22
Using length Mode
You can use Length Mode to measure the length of an unterminated
cable. Do not use this test mode to measure a terminated cable’s length.
Measuring the length of a terminated cable run through splitters and/or
other devices causes one or more of the following errors:
▪
The cable length is computed incorrectly showing an inflated length reading.
▪
The “Short” icon appears.
▪
The “Terminated” icon displays.
▪
If the unit is connected to a cable terminated with a 75 ohm resistor,
the display reports the length as “---” and the “Short” icon appears.
When length is measured, the coax cable is tested for the
presence of an active signal or voltage. If detected, a dynamic
warning displays until the unit is disconnected from the voltage
or active signal source. The Coax Clarifier™ automatically turns
OFF after 90 seconds if the unit is not removed from the voltage
or signal source.
Measure Cable length
1. Connect one end of the coax cable to the F-Connector coupler on top
of the unit.
2. Press the LENGTH button. The LCD display screen shows the
following upon entering Length Mode (see Figure 12):
▪
LENGTH icon appears.
b. Test individual splitters by connecting the Coax
Clarifier™ to the splitter input (cable run through the
splitter) and connecting the dB Loss meter to the
splitter outputs (cable(s) exiting the splitter).
Note:
With a multiple output splitter, you may need to connect the dB
Loss meter to each cable exiting the splitter to verify that each
output produces a good reading.
3. Interpret display results and investigate any variation greater
than 4 dB.
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