3M 965DSP-B - Manuals

10 Press the [Tab] key to move to the next test leadconfiguration. Press the [Enter] key to switch between DC andAC voltage. Voltage This function first measures and displays the DCvoltage between the Red and Black test leads. Press the [Tab] key to move to the next test leadconfiguration. Press the...

11 This screen indicates that a high current hasbeen detected between the test leads and that the965DSP-B has opened an internal relay toprotect itself from damage. Use standard safetypractices for disconnecting the test leads. Pressthe [Enter] key to start the Current test again. Current This funct...

12 Resistance This function first measures the resistancebetween the Red and Black test leads. Press the [Tab] key to move to the next test leadconfiguration. The “V” in the upper right corner of the screenindicates that the resistance measurementcompensates for C.O. voltage on the line. Press the [...

13 Toolbox Use the [Up] and [Down] arrow key to move tothe desired ‘tool’, then press the [Enter] key toaccept the choice. The Toolbox contains four additional functions: • Self-Calibrate • Load Coils • Ohms to Distance • Caller ID Descriptions of these functions are found in thefollowing pages. The...

14 Self-Calibration Use this function to calibrate the 965DSP-Banytime the outside temperature changes bymore than 35 ° F (20 ° C). Calibrate the 965DSP-B at the same temperature at which it will be used. You will see the following screen as soon as youselect Self-Calibration from the Toolbox. Testl...

15 Load Coils This function takes about one minute to countup to four load coils on the pair. You will seethe word ‘Counting’ in the display while the testis in progress. You will see the word ’Done’when then test is complete. Press the [Enter] key at any time if you wish tostop the count earlier. T...

17 Caller ID This function detects the Caller ID signal senton the pair and displays the calling number, thename of the calling party , the signal level, andthe message status. Certain result boxes may beblank if the information is not available from theCaller ID signal. Use the [Up] and [Down] arro...

18 Opens This function shows the distance to an ‘open’(or ‘break’) based on the cable type chosen. TheOpens function is most accurate if other pairs inthe cable are active. If other pairs are not active,you must short at least 30% of the other pairs tothe cable shield. Press the [Up] or [Down] keys ...

19 Edit Custom Use this function to change the value of the“Custom Cable” type. You should use CustomCable if you are using a specific type of specialcable on a regular basis. Press [Enter] to accept the changes and return tothe Opens Setup screen. Press [Back] to returnwithout making changes. First...

20 Calibrate to Cable Use this function to measure the capacitance ofa known good pair within a cable of knownlength. This value can be used as a ‘CalibratedCable’ (or ‘reference’) to find the distance to an‘open’ on the same or similar cable. Connect the Red and Black leads to the pair (tobe used a...

21 Tone Use this function to send a tone on a pair. Press the [Up] and [Down] keys to adjust thevolume of the tone heard in the 965DSP-Bspeaker. Note that the volume control does notaffect the level of the tone sent on the pair. Use the [Up] and [Down] keys to select thedesired tone. Note that the t...

25 RFL Single Pair Use the RFL Single Pair hookup when only onewire in a pair is faulted and a reference pair isnot available. Use the Separate Pair hookup forall other cases; it is the preferred method. You must first use the Resistance function toidentify a faulted conductor in a pair and toverify...

29 ISDN Use this function to detect a 2B1Q ISDN signalon a pair, and to measure near-end and far-enderrors on an active ISDN line. 2B1Q ISDN is sometimes called NI (NationalImplementation) ISDN. Note: the 965DSP-B will not detect older ISDNformats (such as ATT AMI, NTI AMI, etc.). Connect the Red an...

30 The 965DSP-B will count and display the numberof Near-End and Far-End errors. “Near-end” errors are the errors detected at the965DSP-B. “Far-End” errors are errors detected atan ISDN line card. (The far-end count istransmitted to the 965DSP-B over the ISDN link.) The screen displays the elapsed t...

31 dB Use this function to measure Loss, Noise,Longitudinal Balance, or Wideband Loss. See “Talk Set” on page 38 for more informationon dialing numbers. The “Dial Noise” and“Dial Longitudinal Balance” screens appear thesame as above, except for the screen titles. Separate lists of phone number are k...

34 Auto Use this function to perform an automaticsequence of tests on an inactive or active pair. The results appear as each test is completed. If atest cannot be done, “***” appears in theappropriate result box. Inactive Pair Inactive tests are performed on non-workinglines and include: DC Volts, R...

37 Talk Set This function allows you to use the 965DSP-Bas a Talk Set on active pairs, or to send DTMFtones or pulses on inactive pairs. Connect the Red and Black leads to the pair forLoop Start. Also connect the Green lead toground for Ground Start. This screen displays the last number dialed, theD...

38 Talk Set Setup Press the [Setup] key to access the telephonenumber directory. Use the blue keys to change the number. See theEditing instructions on page 6 for additionalinformation. Press the [Enter] key to accept thechanges and return to the previous screen. Use the [Back] key to return to the ...

39 Care and Maintenance Battery Pack: The 965DSP-B uses a NickelMetal Hydride (NMH) battery pack. Typical lifeof the battery pack is two years. To change the battery pack: 1) loosen the sixscrews on the battery compartment door andremove the door, 2) remove the old pack , then3) unplug the battery c...