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3M 965DSP/SA Instruction Manual
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3M 965DSP/SA Instruction Manual

Dynatel 965dsp series subscriber loop analyzers
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Advanced Test Equipment Rentals
www.atecorp.com 800-404-ATEC (2832)
Dynatel
965DSP Series
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Subscriber Loop Analyzers
Instruction Manual
Includes Spectrum Analyzer (optional)
and Active ADSL Modem (optional)
June 2005
78-8130-7429-7-F

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  • Page 1 ® Advanced Test Equipment Rentals www.atecorp.com 800-404-ATEC (2832) Dynatel 965DSP Series ™ Subscriber Loop Analyzers Instruction Manual Includes Spectrum Analyzer (optional) and Active ADSL Modem (optional) June 2005 78-8130-7429-7-F...
  • Page 2 Welcome to the Instruction Manual for the 3M ™ Dynatel 965DSP Series of Subscriber Loop ™ Analyzers. The 965DSP Series includes the 965DSP, 965DSP/ADSL, 965DSP/SA and 965DSP/ADSL/SA Loop Analyzers. This document will give you a brief overview of the products, a description of their test functions, and some technical hints on how to find problems on telecommunications cables.

  • Page 3: Table Of Contents

    Table of Contents Out of the Box ............4 Front Panel .............5 Control Keys .............6 Editing...............6 Function Keys ...........7 Welcome ..............8 Setup (Country, Language, Units, Clock Format, Set Clock, Set Beep, Autotest Limits, Printer, Power Down Timeout, Edit Wire Gauge, Voltage Termination, User Info)...9 Functions Contrast/Backlight ..........20 Help ..............21...
  • Page 4 Additional information is also found in the 965DSP help screens. For Technical Service, Warranty or Repair questions call: 800 426 8688 in the US or Canada, or contact your local 3M Representative. Communication Markets Division 3M Telecommunications 6801 River Place Blvd.
  • Page 5 Screen The 965DSP screen is a graphical LCD (Liquid Crystal Display) that gives high resolution for viewing text and graphics. The screen format is similar to the following for most functions. Test Leads The Test Lead icons are shown on each of the measurement screens.

  • Page 6: Control Keys

    Control Keys Use the red and yellow keys to control the actions and the setup of the 965DSP and its functions. The active control keys for each function are shown at the bottom of the corresponding 965DSP screen. Use the [Return] key to return to a previous step in a function.

  • Page 7: Function Keys

    Function Keys Use the blue keys to select the different test functions in the 965DSP. The blue keys become number or letter keys when editing. Use the [Voltage] key to measure DC or AC voltage. Use the [Current] key to measure loop current.

  • Page 8: Welcome

    Welcome Screen This is the screen that you see when you first turn on the 965DSP. It shows the model name, installed options, serial number, copyright year, software version, and the selected country. The battery symbol in the upper right-hand corner of the display gives an indication of the approximate battery capacity.
  • Page 9 Country Use the Country setup to configure the 965DSP for a specific country. Selecting a new country will configure the 965DSP with the setups for language, units, clock format, wire gauges, and cable types for that particular country. Use the [Up] and [Down] keys to highlight a Country.
  • Page 10 Units Use the Units setup to change the units of measurement for the 965DSP: Use the [Up] and [Down] keys to highlight the option. Use the [Tab] key to select the parameter for each unit of measurement. Distance: Feet or Meters. This affects all distances displayed in the 965DSP.
  • Page 11 TDR: Vp (Velocity of Propagation) or m/µS (meters per microsecond). This affects the TDR “velocity of propagation.” Use “Vp” in the US and Canada. Use “m/µS” in other countries. Use the [Enter] key to accept any changes and return. Use the [Return] key to return to the Welcome Screen without making changes.
  • Page 12 Set Clock Use the Set Clock setup to change the date and time. Use the [Tab] key to select either the date, time, or a.m./p.m. Use the [Left] and [Right] keys to select the digit to change. Use the blue keys to enter the values.
  • Page 13 Autotest Limits Use the Autotest setup to change the pass/fail threshold values for the Inactive Pair, Active Pair and Wideband Autotests. Use the [Up] and [Down] keys to highlight the desired Autotest parameters to modify. Press the [Enter] key to select the highlighted choice or press the [Setup] key to restore the factory default values for the selected Autotest.
  • Page 14 When the Inactive Pair, Active Pair or specific Wideband service is selected, the Threshold Limits screen will be displayed. This screen displays a list of measurements performed in the selected Autotest and the corresponding pass/fail limits for each measurement. The limits indicate the values at which the measurement result passes (OK), is marginal (Yield Sign) or is unacceptable (Stop Sign).
  • Page 15 A custom Loss Frequency (sometimes known as the “Nyquist frequency”) can be set for use in the Wideband Autotest. The custom Loss Frequency edit screen is accessed by pressing the [Setup] key from the startup screen, selecting Autotest Limits, then Wideband.
  • Page 16 Power Down Timeout To change the power down timeout, press the [Setup] key from the Welcome screen, then select Power Down Timeout. Use the [Up] and [Down] arrow keys to select the desired timeout period, then press the [Enter] key to set that period as the default. After a period of inactivity equal to the default period, the unit will beep, then automatically power down.
  • Page 17 Edit Wire Gauge This function allows you to set up custom wire gauges to be used wherever the set uses a wire gauge menu. Press the [Setup] key from the Welcome screen, use the [Down] arrow key to scroll to Edit Wire Gauge, and then press the [Enter] key to edit.
  • Page 18 Voltage Termination (supported countries only) This option allows you to select the input impedance of the 965DSP digital voltmeter. Press the [Setup] key from the Welcome screen, use the [Down] arrow key to scroll to Voltage Termination, and then press the [Enter] key to select.
  • Page 19 If 100Kohm termination is selected, the 965DSP will display ‘100K’ on the voltage measurement screen as indicated below. User Info This selection allows you to add optional additional information to your saved records. Press the [Setup] key from the Welcome screen, use the [Down] arrow key to scroll to User Info, and then press the [Enter] key to select.
  • Page 20 Use the [Tab] key to select ‘ON’ or ‘OFF’ and [Enter] to save your selection. Once the User Info option has been changed, the changes remain in effect until you explicitly change them again. Contrast/Backlight Press the [Contrast] key to display the contrast screen.

  • Page 21: Help

    Help Press the [Help] key at any time in any screen to get help on that function. Press the [Enter] or [Return] key to return to the previous screen. High Voltage This screen indicates that a high voltage (120 Vac/ Vdc or greater) has been detected between the test leads when not in the Voltage Mode.

  • Page 22: Voltage

    Function Keys Voltage This function first measures and displays the DC voltage between the red and black test leads. Press the [Tab] key to move to the next test lead configuration. The highlighted reading is “live” and the non-highlighted readings are the last values. Press the [Enter] key to switch from the DC to the AC voltage measurement.

  • Page 23: Current

    Current This function measures the DC current flowing through a 430 Ohm resistor inside the 965DSP. Connect the red and black leads to the pair to measure loop current. If the Current is greater than 110 mA, you will see the following ‘Current Warning’...

  • Page 24: Resistance

    Resistance This function first measures the resistance between the red and black test leads. Press the [Tab] key to move to the next test lead configuration. The “V” in the upper right corner of the screen indicates that the resistance measurement compensates for C.O.

  • Page 25: Soak Test

    Soak Test Use the Soak Test function to continuously measure the non-compensated resistance tip to ground and ring to ground simultaneously. Press the [Right] arrow key to access the Soak test from the Resistance screen. Connect the red and black leads to an inactive pair. Connect green to shield or ground.

  • Page 26: Toolbox

    Toolbox The “Toolbox” menu contains a selection of functions depending on the options equipped in the unit and the Country Code selected during Setup (i.e. Caller ID is available only in North America and ADSL Stored Results is only available on /ADSL- equipped models).
  • Page 27 Self-Calibration Use this function to calibrate the 965DSP anytime the outside temperature changes by more than 35°F (20°C), after changing the batteries, or anytime the battery pack completely discharges. Calibrate the 965DSP at the same temperature at which it will be used. Note: Initiate a self-calibration prior to the very first use of your 965DSP.

  • Page 28: Load Coils

    Load Coils This function counts up to five load coils on the pair and determines the distance to the first one. The distance measurement requires that you specify the wire gauge of the pair. This is done in the Load Setup screen. Use the [Up] and [Down] arrow keys to highlight the correct wire gauge.

  • Page 29: Kick Test

    Kick Test Use the Kick Test function to continuously measure the voltage, resistance and capacitive length on tip- ring, ring-ground, and tip-ground. Connect the red and black leads to the selected pair. Connect green to shield or ground. Press the [Tab] key to move to the next lead configuration.

  • Page 30: Stored Results

    Stored Results Use this function to view previously stored results of the Autotest or TDR function. If no results have been stored, “No Results Stored” will be visible on the screen. If one or more test results have been stored, the ID number for each will be displayed.
  • Page 31 Delete Results Press the [Right] key to display the Delete screen. Press the [Enter] key to delete all saved results. Press the [Tab] key to delete the saved results of the selected ID. Press the [Return] key to return to the main Results screen.
  • Page 32 To print the results to a printer, you must have a compatible serial printer such as the Seiko DPU- 414-30B and a printer IR adapter cable (3M PN 26- 1014-6888-7 available through 3M Communication Markets Division Repair Center). The printer should be configured for 9600 baud, 8 data bits, 1 stop bit, no parity.

  • Page 33: Adsl Results

    ADSL Results Use this function to view previously stored ADSL Modem test results (/ADSL option only). Note: “ADSL Results” does not appear in the Toolbox menu unless the /ADSL option is installed. If no ADSL Modem test results have been stored, “No Results Stored”...
  • Page 34 Upload ADSL Results To upload ADSL stored results to a computer, press the [Tab] key to display the Upload screen. Press the [Enter] key to upload all of the saved ADSL results. Press the [Tab] key to upload the saved results of the selected ID. Press the [Esc] key to return to the main ADSL Results screen.
  • Page 35 The results will be displayed in the format used in the actual test. To upload the ADSL test results to a PC, use an IR adapter cable (3M P/N 80-6109-9197-0) and 3M PC Link Communications software package Version 1.4 (or higher).

  • Page 36: Caller Id

    Caller ID This function detects the Caller ID signal sent on the pair and displays date, time, the calling number, the calling party name, the signal level, and the message status. Certain result boxes may be blank if the information is not available. Connect the red and black leads to an active pair and press the [Enter] key to start the test.
  • Page 37 Ringing Length (A) - The measured time duration of the first Ring Burst. Preseize Time (B) - The measured time period between the first Ring Burst and Channel Seizure. Twist - The ratio of the received Mark and Space signal levels. Seizure Bits - The number of bits received during the Channel Seizure (C) period.

  • Page 38: Special Resistance

    Special Resistance Use this function to measure the: • Loop Resistance between the red and green test leads. • Resistance of each conductor connected to the red and green test lead. • Resistance Difference between the two conductors. Connect the red lead to one side of the pair. Connect the green lead to the other side of the pair.

  • Page 39: Ground Resistance

    Ground Resistance Use this function to verify the protector ground resistance compared to a Central Office (C.O.) using the 965DSP and an active pair. Connect the red lead to Ring of the active pair. Connect the black lead to Tip. Connect the green lead to Ground.

  • Page 40: Ohms/Distance

    Ohms/Distance Use this function to convert from Ohms to Distance based on temperature and wire gauge. Enter the value of Ohms, then press the [Tab] key to select gauge or temperature. If you select “gauge,” press the [Up] and [Down] keys to select the desired gauge.

  • Page 41: K-Test

    “closed” (the strap connected). You may choose to use a “far-end switch” to open and close the far-end. The 3M KM Box Model 1162 is recommended for this application. The 965DSP will automatically send tones on the blue and yellow leads to communicate with the 3M KM Box (far-end switch).
  • Page 42 Connect black to the reference wire (either the shield or another conductor in the cable). If you are using a far-end switch (3M KM Test Switch Model 1162) to open and close the far-end, you should also connect the blue and yellow leads to the pair under test.
  • Page 43 K-Test Hookup: Close Far-End The 965DSP will display the following screen if it does not detect any hook-up errors during the “Open Far-End” test. The “Open Ratio” value displayed on the screen is the ratio of R1/(R2+R1) times 100. This value is used by some companies as part of the K-Test measurement.
  • Page 44 K-Test Results The 965DSP will display the following screen if there are no problems with the “Close Far-End” portion of the test: The 965DSP displays the Resistance to Strap (RTS), Resistance to Faults (RTF) and the Resistance Strap to Faults (RSTF). The 965DSP displays the open and closed fault ratios.
  • Page 45 K-Test Summary If you press the [Enter] key in the previous screen, the 965DSP will display the following summary of up to five K-Test results: The 965DSP displays the Resistance to Faults (RTF), Resistance Strap to Faults (RSTF), and the Resistance to Strap (RTS) for up to five measurements.
  • Page 46 K-Test Error: Flip red and green The 965DSP will first make a measurement to verify that the heavier fault is connected to red and the lighter fault is connected to green. If the size of faults is reversed, you will see the following screen: K-Test Error This screen indicates that the connections to the red and green leads are reversed and the leads should be...
  • Page 47 K-Test Error: R1<2*R2 The 965DSP checks to see that the fault on the green lead is at least twice the value of the fault on the red lead. This screen indicates that the ratio of the faults is too low. Press [Enter] to return to the initial “K-Test Hookup: Open Far-End”...
  • Page 48 K-Test Error: Rloop > 7kΩ The 965DSP checks to see if the resistance of the loop is less than 7kΩ. If the resistance is greater than 7kΩ, then the distance to strap may be too long, the strap is not connected, or the far-end switch did not switch properly.
  • Page 49 K-Test Error: R1+R2<100*Rloop The 965DSP checks to see that the sum of the faults is more than 100 times the loop resistance. The 965DSP will display the following screen if the sum of the faults is less than 100 times the loop resistance. Press [Tab] to continue even though the fault values are too low.

  • Page 50: Ringers

    Ringers This function measures the capacitance associated with one or more ringer circuits on the line or the equivalent number of ringers (1 ringer = 0.47 uF). Either the Ringers Capacitance screen or the Ringers (equivalent) screen will be displayed depending on which was last selected.

  • Page 51: Splice Locate

    Splice Locate Use this function to find the location of a splice in two sections (of different wire gauges) of cable. Start Connect the red and green leads to the pair. Connect the strap at the far-end across the pair. Use the [Tab] key to select either: 1) the first section wire gauge, 2) the second section wire gauge, 3) the Distance to Strap (DTS), or 4) the temperature.

  • Page 52: Opens

    Opens This function measures the distance to a complete “open” on a pair based on a selected cable type. “Opens” is more accurate if other cable pairs are active. If other pairs are not active, short at least 30% of the inactive pairs to the cable shield. The TDR function should be used to determine distance to a “partial”...
  • Page 53 Press the [Tab] key to edit the “Custom” cable type. Press the [Setup] key to edit the “Calibrated Cable” type. Edit Custom Use this function to change the value of the “Custom Cable” type. Select Custom Cable if you are using a specific type of special cable on a regular basis.
  • Page 54 Enter the length of the section and press the [Enter] key to measure the capacitance. The 965DSP will then display the measured capacitance/distance for the reference pair. Press the [Enter] key to accept the results as the “Calibrated Cable” and return to the Setup screen. Press [Return] to return without saving.

  • Page 55: Tone

    Tone Use this function to send a tone on a pair. Use the [Up] and [Down] keys to select the desired tone. Note that there are ten tones. Use [Up] and [Down] to scroll through the tone selections. There are three types of tones: ID Tone for pair identification and coiling, Precision Tone for 600 Ω...
  • Page 56 ID Tone Precision Tone High Frequency Tone The volume of the tone heard in the 965DSP speaker may be adjusted for the ID Tone and the Precision Tone. No tone is heard in the speaker for the High Frequency Tone.
  • Page 57 Press the [Up] and [Down] keys to adjust the volume. The output impendance for the Precision Tone (600 Ω) and the High Precision Tone (135 Ω) will be visible in the lower left side of the screen. Use [Enter] to stop sending. Note: The volume control does not affect the level of the tone sent on the pair.
  • Page 58 RFL (Resistance Fault Locate) Use this function to locate a Resistance Fault on a pair or on a single conductor. There are two possible hookups: Separate Pair or Single Pair. Use [Tab] to switch between the two hookups. Separate Pair (This is the preferred hookup) You must first use the Resistance function to determine the faulted conductor and identify a separate good pair (a pair with no faults).
  • Page 59 Connect the red test lead to the faulted wire. Connect the black Lead to the reference. (The reference is the return path for the fault and can be the shield or another wire in the cable.) Connect the green and yellow test leads to the separate good pair.
  • Page 60 The screen shows the fault resistance beside the resistor symbol. The wire gauge, temperature and section number are displayed above the bottom bar. If the Yield Sign shows beside the results, this indicates a possible marginal result (due to noise or other line conditions).
  • Page 61 RFL Single Pair Use the RFL Single Pair hookup when only one wire in a pair is faulted and a separate good pair is not available. Use the Separate Pair hookup for all cases in which a separate pair is available; it is always the preferred method.
  • Page 62 During the measurement a bar graph of the measurement null voltage for RTS and then RTF will be visible at the bottom of the screen. The results at the top of the screen indicate the “Distance to Strap”. The results on the second line indicate the “Distance to Fault”...
  • Page 63 If there is a problem with the connections, you will see the “Hookup Error” screen. There are two possible single pair hookup errors: 1) the Fault is greater than 20 MΩ, or 2) the red/green strap is bad. The screen will show the combination of errors that have been detected.
  • Page 64 Press the [Tab] key to select either the wire gauge menu, cable temperature, or length (distance to Strap) for editing. If you select the Wire Gauge menu, press the [Up] and [Down] keys to select the desired gauge. If you choose Temperature or Length, enter the new value using the blue numeric keys.
  • Page 65 The Multi-Section screen shows a summary of up to six sections, and the common temperature for all sections. One cable parameter (a section length or temperature) should be left as unknown. If a value is entered for all parameters, temperature will be treated as an unknown and will be calculated by the 965DSP.
  • Page 66 Edit Section Information If you choose to edit the Section information (gauge or distance) for any of the six sections, use the [Up] and [Down] keys to select the desired section, then press the [Setup] key to edit the selected section. Press [Enter] to accept the changes for the section and return to the previous RFL Setup screen.
  • Page 67 RFL Multiple Results There are two possible formats for displaying the results of an RFL Multiple measurement: 1) The temperature is known. In this case the screen will show the calculated Distance to Strap (the sum of all sections) in the main result box and the “Distance to Fault”on the left on the next line and the “Distance Strap to Fault”...
  • Page 68 2) The temperature is unknown. In this case the screen will show the entered Distance to Strap (or the sum of all sections) in the main result box, and will show the calculated temperature at the bottom. The screen also shows the number of the faulted section at the lower right side of the screen.
  • Page 69 Use [Tab] to convert between Ohms and Distance. Use [Setup] to display the RFL Multi-Section Setup screen again. The multi-section screen will now show the computed length of the unknown section. RFL Errors One of several errors may occur during an RFL multi-section measurement.
  • Page 70 If the temperature is known and the total of the specified section lengths is greater than the measured distance to strap, then the calculated unknown section length would be negative. This will cause a “Yield Sign” to be displayed to the left of the setup boxes and “***”...
  • Page 71 Use this function to perform specialized tests on ISDN and DSL lines. Use the [Up] and [Down] arrow keys to move to the desired test, then press the [Enter] key to accept the choice. Note: All 965DSP Series Loop Analyzers are equipped with the ISDN Datalink function;...
  • Page 72 Connect the red and black leads to the pair and press the [Enter] key. The 965DSP displays the word “Connecting” while the instrument goes through three steps: 1) AIP (Activation in Progress), 2) Sync (Synchronization) , and 3) Link (successful connection). If any of these three tests is unsuccessful, the words “Link Failed”...
  • Page 73 ISDN Error Test (supported countries only) The 965DSP can perform a near-end and far-end block error test after linking to an active ISDN line. Note: This function is suppressed in countries where ISDN interoperability with the 965DSP Block Error Test has not been verified. The 965DSP will count and display the number of near-end and far-end errors.
  • Page 74 965DSP models which include the ADSL modem function are identified by the /ADSL option on their Welcome screens. The Welcome screens for the 965DSP/ADSL and 965DSP/SA/ADSL are shown below. Use the ADSL modem feature to establish a link with a DSL Access Multiplexer (DSLAM) in the central office or remote cabinet and determine the ADSL data rate that the pair will support.
  • Page 75 ADSL Setup Use ADSL setup to select the desired test type, ADSL service type, and to enable or disable Pass/Fail thresholds. Use the [Tab] key to move between fields and the [Up]/[Down] arrows to select an option. Select Captured Test to set up a link, measure the line performance, and drop the line automatically to save battery life.
  • Page 76 Press the ReTest key to repeat the self test.The internal ADSL modem may still function if the self test fails, but performance could be degraded. Contact 3M Technical Service for assistance.
  • Page 77 ADSL Connecting The 965DSP displays this screen while it is connecting with the DSLAM. Status messages about the connection process are displayed as they occur. The hourglass indicator at the bottom of the screen is displayed as the connection process proceeds. Connection states include: Starting: The ADSL modem in the 965DSP is...
  • Page 78 Otherwise, the Status screen below is displayed. Only the achieved Upstream and Downstream line rates and capacity values are shown. The pair PASSED if the line rates were greater than or equal to the threshold rates and the capacity values were less than or equal to the threshold capacities.
  • Page 79 Note: This screen is continuously updated in Continuous Test Mode. FAST: Achieved line rate in kilobits per second on the Fast channel. INTR: Achieved line rate in kilobits per second on the Interleaved channel. Note: FAST or INTR will display with the achieved line rate to indicate the selected channel type.
  • Page 80 DSLAM modem manufacturer information is displayed if available, but this feature is not supported by all service types or manufacturers. The 965DSP displays ‘unknown’ in this field if the DSLAM manufacturer information is unavailable. FEC, CRC, and HEC counts in each direction are also displayed.
  • Page 81 Note: This screen is continuously updated in Continuous Test Mode. LOS indicates a Loss of Signal alarm. This means that the ADSL received pilot tone power was 6dB or more below its reference power. Pilot tones do not carry data and are used for line synchronization. LOF indicates a Loss of Frame alarm.
  • Page 82 The ADSL Graph presents a graphic display of the number of bits transmitted in each ADSL Discrete Multi Tone (DMT) frequency bin. ADSL modems require wide bandwidth to operate since they essentially use 256 separate simultaneous modems, each requiring about 4kHz of bandwidth called a bin.
  • Page 83 The date and the time display the 965DSP “system clock.” See the “Set Clock” section on page 12 for further information on setting the clock, and also for information on the format of the date and time. Use the blue keys to enter an alphanumeric ID. The ID may have up to fourteen characters.
  • Page 84 Edit the Tech ID and Job Number using the same procedure described previously. Up to 14 alphanumeric characters can be entered in each field. Use the [Tab] key to jump between highlighted boxes. Use the [Setup] key to clear both fields. The data entered into each field will remain present for every saved result until explicitly changed or cleared.
  • Page 85 965DSP Modem Information Conditions affecting the internal ADSL modem in the 965DSP are displayed via warning screens. In the unlikely case that the warning message shown above appears, simply exit the ADSL Modem application for a few minutes to allow the modem to cool down.
  • Page 86 Common error codes and their causes are listed in the table below. Contact 3M Technical Service for any undefined codes. i t a , e t s i e i t a i t a i f i i t a...
  • Page 87 Error conditions causing modem timeouts are displayed with numeric codes and as ‘Connection: Timed Out’ abbreviated text definitions. Common error conditions and their causes are listed in the table below. Contact 3M Technical Service for any undefined codes. Numeric Meaning Code...
  • Page 88 965DSP models which include DSL Parametric Tests are identified by the /SA option on their Welcome screens. The Welcome screens for the 965DSP/SA and 965DSP/SA/ADSL are shown below. For DSL loss and DSL noise measurements (/SA option only), you first need to select the type of DSL service that you want to test.
  • Page 89 DSL Loss (/SA option only) Use this function to measure loss from the far-end to near-end using a tone between 20kHz and 1.2MHz. You must use a separate instrument to generate the tone at the far-end. The screen displays the signal level in dBm, the frequency of the tone in kHz, the selected service type, and the line terminating impedance.
  • Page 90 Spectrum Analyzer (/SA option only) This function provides a graphic display of the signals and noise on a line over a selected range of frequencies. Connect the red and black test leads to the pair. Use the [UP] and [DOWN] arrow keys to select the frequency span of interest.
  • Page 91 Interference Frequency Signatures The 965DSP Spectrum Analyzer function provides a graphical display of the signals and noise on a line over a selected range of frequencies. The spectrum analyzer continuously analyzes the line and updates the screen as conditions change. The screen displays the average power of all signals and noise in the selected frequency span in dBm at the upper left.
  • Page 92 Proper Operation The 965DSP Subscriber Loop Analyzer measures extremely low noise levels and requires proper handling of the test leads to ensure consistent measurements. Extend the test leads away from the 965DSP when conducting DSL tests, and make sure that the red and black leads are kept as close together as possible to minimize RF noise pickup.
  • Page 93 This function shows the pair as a “trace” on the screen. TDR measures distance to events based on input about the pair. TDR Setup TDR features a setup function that allows you to enter the cable type, gauge and first length. Vp is then automatically set from these selections.
  • Page 94 Single Trace Connect the red and black test leads to the pair under test. Single Trace is used to view a single pair at a time. Dual Trace Connect the red and black test leads to the pair under test. Connect the blue and yellow test leads to the reference pair.
  • Page 95 The pair under test is displayed at the top of the screen. The reference pair is displayed at the bottom of the screen. Any changes in the control parameters affect both traces. It is not possible to control each trace independently. Dual Trace is used to compare two pairs at the same time (usually a faulted and a good pair).
  • Page 96 Memory Connect the red and black test leads to the pair under test. Memory mode is used to compare a pair under test to a stored trace in memory. The first screen in memory mode will show a list of the ID numbers for all stored TDR traces.
  • Page 97 You may move the cursor by using the [Left] and [Right] keys. The control settings for the stored trace can be viewed by pressing the [Tab] or [Enter] keys but the settings cannot be changed. The TDR Memory function includes a Difference control, accessible from the memory screen by pressing the [Tab] key.
  • Page 98 Peak Use the TDR Peak mode to capture events that may be intermittent. This mode continuously detects and displays the maximum and minimum traces that occur from the time that the mode is first selected. The ‘live’ trace is also displayed continuously. As a new maximum or minimum trace is detected, it will replace the previous one on the display.
  • Page 99 TDR Controls The controls described below are valid for all modes except the Memory mode. The 965DSP displays the controls and other parameters at the bottom of the screen. Use the [Tab] and [Enter] key to move forward or backward through the TDR controls. Use the [Up] and [Down] key to change the parameters for the control selected.
  • Page 100 Gain: 0db, 6db, 12db, 18db, 24db, 30db, 36db, 42 db, 48db, 54db through 198 db - for a total of 34 gain settings. Gain allows you to select the vertical gain of the TDR. Higher gain will make events look taller on the screen and is helpful for finding small faults.
  • Page 101 Zoom: x1, x2, x4, x8, x16 Zoom allows you to set the horizontal gain of the TDR. Higher Zoom will spread out the trace and make it easy to identify the start of an event. Move Cursor: [Left] [Right] Use the [Left] [Right] arrow keys to move the cursor across the screen.
  • Page 102 that is out of viewing range or until one of the display controls is changed. This is demonstrated below. The first screen shows the TDR trace before vertical offset. The next screen shows the TDR trace after offset. The vertical offset function affects all modes except Memory.
  • Page 103 ‘Peak’ Events Launch Pulse: The first peak on the screen is the “launch pulse” which occurs where the 965DSP connects to the test leads (at a distance of 0 feet or meters). The distance to the cursor includes the five foot length of the test leads.
  • Page 104 The date and time displayed is the 965DSP “system clock.” See the “Set Clock” section on page 12 for further information on setting the clock and for information on the format of the date and time. Use the blue keys to enter an alphanumeric ID. The ID may have up to fourteen characters.
  • Page 105 Edit the Tech ID and Job Number using the same procedure described previously. Up to 14 alphanumeric characters can be entered in each field. Use the [Tab] key to jump between highlighted boxes. Use the [Setup] key to clear both fields. The data entered into each field will remain present for every saved result until explicitly changed or cleared.
  • Page 106 Use this function to measure Loss, Noise, Longitudinal Balance, Wideband Loss, or perform a Level Trace. Press the [Up] or [Down] keys to move to a test. Press the [Enter] key to accept the choice. For Loss, Noise and Longitudinal Balance, you will first be asked to dial a number (for a quiet line, milliwatt line, etc.) before starting the test.
  • Page 107 Loss Use this function to measure the loss from the far- end to the near-end using a tone between 200 Hz and 20 kHz. You must use a separate instrument to generate the tone at the far-end. Press the [Tab] key to go to Noise. Press the [Left] arrow key to go to Longitudinal Balance.
  • Page 108 Longitudinal Balance Use this function to measure the active Longitudinal Balance on the pair. The 965DSP automatically goes off-hook to measure Longitudinal Balance. Press the [Tab] key to go to Loss. Press the [Left] arrow key to go to Noise. Press [Enter] to return to the dB menu.
  • Page 109 Level Trace Use this function to measure and display the AC impedance of an inactive pair as a function of frequency. This test can be used to analyze a pair for loading and bridge tap problems. The result is displayed on a graph with relative impedance level displayed on the y-axis (in dB) and the frequency on the x-axis.

  • Page 110: Autotest

    Use this function to perform an automatic sequence of tests on an Inactive, Active or Wideband pair. The Wideband Autotest requires the use of a Far-end Device (FED) such as a 3M FED, FED II, or CTC Smart Strap . The Inactive Pair Autotest can be ™...
  • Page 111 Use the [Tab] key to select the cable type, test type, or wire gauge for editing. Use the [Up] and [Down] keys to highlight the desired cable type or wire gauge. Press [Enter] to accept the changes and return to the previous screen. Use the [Return] key to exit without making changes.
  • Page 112 The test result values or pass/fail status will be displayed for each test. Press the [Enter] key to repeat the test. Press the [Tab] key to view the test values for all tests. Press the [Tab] key to return to the pass/fail screen or [Enter] to retest.
  • Page 113 Press the [Setup] key to change the Active pair parameters. Use the [Up] and [Down] keys to select Loss or Noise/Longitudinal Balance setup and press the [Setup] key. The Noise/Longitudinal Balance setup screen is identical to the screen above, except for the heading. Press the [Tab] key to select the parameter to edit.
  • Page 114 Connect the red test lead to ring of the pair, the black lead to the tip and the green test lead to ground. From the Auto Menu Screen, press the [Enter] key to start the Autotest. The Active Pair results screen will appear.
  • Page 115 ™ Inactive Active Wideband Use the [Up] and [Down] keys to select a 3M FED, 3M FED II, or the CTC Smart Strap ™ If a CTC Smart Strap is selected, you must also enter the pair number to be tested. Use the [Tab] key to highlight the Test Pair number box.
  • Page 116 ID tone on the Control pair. This can be used to identify the pair at the other end. If an ID tone is not needed, the 3M FED can be left off since it will be remotely powered up during the Autotest.
  • Page 117 SmartStrap™ Connection The CTC Smart Strap Model C1100 supports ™ Inactive Pair testing only and requires a separate, good control pair. A Wideband Module Model C1110W is required for Wideband Autotest. At the far end of the cable, connect the Control Pair (Pair 0) T and R terminals to the separate control pair in the cable.
  • Page 118 Inactive Pair Autotest (with a FED) The Inactive Pair screen displays the type of test (Basic or Full), the type of service (POTS), the wire gauge, the FED type, and the cable type. If the FED II has been selected for the Far End Device, the user can test Pair 1 by pressing [Enter] or test Pair 2 by pressing the right arrow key.
  • Page 119 FED, two additional test leads that are used to control the Smart Strap will be shown on the screen. Inactive Setup (with FED) Press the [Setup] key to change the Inactive pair parameters. Inactive setup with 3M FED selected...
  • Page 120 Press [Enter] to accept the changes and return to the previous screen. Use the [Return] key to exit without making changes. Note: For Inactive Autotest with the 3M™ FED II and Pair 2 selected, the following screen will appear during the FED II initialization process.
  • Page 121 Inactive Pair - Basic Test - Pass/Fail Screen Inactive Pair - Full Test - Pass/Fail Screen The test result values or pass/fail status will be displayed for each test. Press the [Enter] key to repeat the test. Press the [Tab] key to view the test result values for all tests.
  • Page 122 Inactive Pair - Basic Test - Value Screen Inactive Pair - Full Test - Value Screen Press the [Tab] key to return to the pass/fail screen or [Enter] to retest. To view the graph of the voice-band sweep loss results, press the [Down] key. Press [Enter] to return to the previous screen.
  • Page 123 SmartStrap will be shown on the screen. If the 965DSP has DSL Parametric Test capability (/SA option) and the 3M FED II has been selected for the Far End Device, five additional service types (HDSL2, HDSL4, H2/4ACC, H4NACC and H4RACC) can also be tested.
  • Page 124 Wideband Setup Wideband Setup - FED Wideband Setup - FED II or SmartStrap Use the [Tab] key to select the cable type, test type, wire gauge, type of service, or longitudinal balance termination (FED II or Smartstrap™ only). Use the [Up] and [Down] keys to highlight the desired choice.
  • Page 125 If the 965DSP has DSL Parametric Test capability (/SA option), and the 3M FED II has been selected for the Far End Device, five additional service types are available. These are HDSL2, HDSL4, H2/4ACC, H4NACC and H4RACC. H2/4ACC is a prequalification/acceptance test for HDSL2 or HDSL4 service.
  • Page 126 Wideband - Basic Test Wideband - Full Test The Wideband - Full Test includes a resistive balance test (using special resistance) that requires a different test lead connection. When this part of the Autotest is reached, the user will be requested to swap the black and green test leads or to skip this test.
  • Page 127 The test result values or pass/fail status will be displayed for each test. Press the [Enter] key to repeat the test. Press the [Down] key to view test result values for all tests. Press [Enter] to return to the Pass/Fail screen or the [Down] key to display the Transmission Data screen.
  • Page 128 FED Initialization Error Screens The 965DSP performs a test to determine if it can communicate with the FED. If this test fails, the following warning screen will appear. The 965DSP performs a second test to determine if the user’s choice of a FED II is correct. If a FED is found instead of a FED II, this screen will appear.
  • Page 129 If the green test lead is not properly connected, the following screen will be displayed. Check the test lead hookup for the 965DSP and the FED. The Autotest can be run with the FED connected directly to the 965DSP to determine if the cable hookup is causing the problem.
  • Page 130 Autotest Configurations The following tables list the tests performed for the Inactive Pair, Active Pair and Wideband Tests. Test Basic Full Pass/Fail Ohms Opens Long. Balance Load Coil Inactive Pair Tests without FED Ohms Opens Long. Balance Voiceband Scope Single Tone Loss Loop Resistance Load Coil Inactive Pair Tests with FED...
  • Page 131 50, 80, 130, 196, 250, 300, 350 H4RACC** 50, 90, 130 20, 30, 50, 70, 90, 110, 130, 196, 400 50, 90, 130, H4NACC** 20, 30, 50, 70, 90, 110, 130, 196, 400 *Changeable by user **965DSP/SA series only Inactive & Wideband Loss Frequencies...
  • Page 132 Autotest Save You can save all of the results of an Autotest. After an Autotest has completed, press the [Save] key (camera icon) to save the results. The 965DSP will display the Save Results screen as follows: The date and time display the 965DSP “system clock.”...
  • Page 133 To change or delete any of the characters that have been entered, use the [Right] or [Left] key to move the cursor under the letter to be changed or deleted. To delete the character, press the [Down] key. To change the character, press the key of the new character once (for a number) or several times (for a letter).
  • Page 134 Autotest Results Screen Symbol Definitions - DC Volts measurement results - Ohms measurement results - Opens measurement results - Longitudinal balance measurement result - Load coil detect/distance to first load coil - Loop current measurement result - Ground Resistance measurement - Single frequency loss measurement result - Metallic Voiceband or Wideband noise measurement result...
  • Page 135 Talk Set This function allows you to use the 965DSP as a Talk Set on active pairs or to send DTMF tones on inactive pairs. Connect the red and black leads to the pair for lines using Loop Start. Also connect the green lead to ground on Ground Start lines.

  • Page 136: Talk Set Setup

    Talk Set Setup Press the [Setup] key to access the telephone number directory. Use the [Tab] key to highlight a desired menu. Use the [Up] and [Down] arrow keys to move to a desired telephone number, select the dial mode (DTMF or Pulse), and the start mode (Loop or Ground).

  • Page 137: Care And Maintenance

    Care and Maintenance Battery Pack The 965DSP uses a Nickel Metal Hydride (NiMH) battery pack. Typical life of the battery pack is two years. To change the battery pack: 1) Loosen the six screws on the battery compartment door and remove the door. 2) Remove the old pack.
  • Page 138 AC Charger Use the AC charger to charge the NiMH Battery pack. Plug the AC cord into the AC charger and into a power outlet. Plug the DC cord into the 965DSP. Make sure that the key on the plug fits properly into the slot in the connector.
  • Page 139 Use soap and water to clean them if necessary. Replacement Items You may order any of the following replacement items from 3M. Contact 3M Communication Markets Division Customer Service at 800 426 8688 for more information. Accessory...

  • Page 140: Troubleshooting

    Please make a note of the conditions when any failure occurred and record any error messages that may have appeared on the screen. Call 3M Repair Service at 800 426 8688 and select Option 2 (in the US or Canada), or call your local 3M representative in other countries for further details on repair service.

  • Page 141: Specifications

    Specifications Size: 4.6x10.3x3" (11.7x26x7.6 cm) (\ADSL option): 4.6x10.3x3.75” (11.7x26x9.5 cm) Weight: 4.0 lbs (1.8 kg) (\SA option 4.2 lbs (1.9 kg) (\ADSL option): 4.4 lbs (2 kg) Operating Temp: 0 to 140°F (-18 to 60°C) Storage Temp: -40 to 165°F (-40 to 75°C) Note: Weight includes softcase and test leads.
  • Page 142 Function Range Accuracy Loss: -40 to +10 dBm 0.5 dB @600 Ω 200 to 3000 Hz 2 Hz 3 kHz to 10 kHz 10 Hz 10 kHz to 20 kHz 20 Hz Wideband Loss: -50 to +2 dBm 2 dB @135 Ω...
  • Page 143 >0 dBmOp Ground <25 — >25 Ohms Resistance* Insulation >3M 300K to 3M <300K Ohms Resistance Longitudinal >59 50 to 59 <50 Balance * Note: Ground Resistance can not be measured on “floating tip” or “floating A” switches such as the AT&T #5ESS.

  • Page 144: Self-Test Board

    Self-Test Board A self-test board is included with the 965DSP to verify the performance of Opens and RFL. This is particularly important if operating conditions (shock, temperature, etc.) have changed and you want to check the unit's accuracy. Check Opens performance: To verify Opens, connect the red test lead to the “R”...
  • Page 145 Check RFL performance: To verify RFL, connect the red test lead to “R,” the black test lead to the “B,” the green lead to “G,” and the yellow lead to “Y.” Press the [RFL] key on the 965DSP. Press the [SETUP] key, enter 70°...
  • Page 146 Warranty; Limited Remedy; Limited Liability. This product will be free from defects in material and manufacture for a period of one (1) year from the time of purchase. 3M MAKES NO OTHER WARRANTIES INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.

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