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DSP-100/2000
Users Manual
2-22
Overvoltage Test
The test tool periodically checks for dc voltages on the cable connected to the
RJ45 jack. A dc voltage means that the test tool is connected to an active
telephone cable or other power source. If voltage is detected, the following
message appears:
WARNING! EXCESSIVE VOLTAGE DETECTED AT INPUT.
Voltage on the cable can damage the test tool or cause errors in measurements.
Voltage must be removed before you can run any tests.
Noise Test
The test tool periodically checks for excessive electrical noise on the cable under
test. If excessive noise is detected, the following message appears:
WARNING Excessive noise detected.
Measurement accuracy may be degraded. To continue the test,
press E. If you continue the test and then save the test results, the test
report will include the warning given above.
To stop the test and return to the first screen of the selected test mode, press e.
Configuring the Test Tool
Controlling the Backlight
To turn on the display backlight, press C on the keypad. Press the key again to
turn off the backlight. On Model DSP-2000, the backlight key toggles the
backlight between two levels of brightness.
You can set the backlight timer to automatically turn off the backlight after a
specified period of inactivity. You can also disable the backlight timer.
To set the backlight timer or disable the timer, proceed as follows:
1. Turn the rotary switch to SETUP.
2. Press $Page Down once.
3. Use D to highlight the backlight time-out setting.
4. Press ! Choice.
5. Use D U to highlight the desired time-out period or the disable status.
6. Press E to accept the highlighted selection.