3-26 PN: 10580-00343 Rev. H S820E UG
3-6 Advanced Measurements Cable and Antenna Measurements
Transmission (Ext. Sensor)
If you are able to connect only one end of the cable to the Site Master, then
you can use the Transmission measurement with External Sensor. For this
measurement, you connect the cable under test to Port 1 of the Site Master,
and you connect a USB transmission sensor or power sensor to the other end
of the cable. USB extenders can be used for long cable runs. This
measurement provides accurate results of cable loss up to 30 dB. This is a
scalar measurement, providing only magnitude data (no phase) and,
therefore, does not use vector error correction for its calibration steps.
Instead, it uses a sensor reference calibration. Figure 3-15 is a Cable Loss
Measurement Example of an External Sensor Transmission.
When performing both transmission and return loss measurements on the
same cable, for best results, the return loss should be measured with a
good-quality termination at the end of the cable.
Figure 3-15. External Sensor Transmission Measurement Example
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