The cable loss test verifies the signal attenuation level of the cable. This test can be done using the Cable Loss or Return Loss Measurement with a short or an open connected at the end of the system. The advantage of using the Cable Loss measurement is that there is no need to compute the results. Cable Loss is a Return Loss measurement, but it also takes into consideration that the signal travels in both directions.
Procedure
1. If a test port extension cable is to be used, connect it to the RF Out connector on the BTS Master.
2. Press the Measurement main menu key and press the Cable Loss submenu key.
3. Press the Freq/Dist main menu key and set the Start Frequency and Stop Frequency.
4. Press the Shiftkey, then the Calibrate(2) key.
5. Press the Cal Type submenu key to set the calibration to 1-Port.
6. Press the Start Cal submenu key and perform a 1-port OSL calibration at the connector or at end of the extension cable. When the Calibration is finished, Cal Status On should be displayed in the upper left part of the display and the trace should be centered around 0 dB when the short or open is connected.
7. Connect the test port extension cable to the Feed Line.
8. Refer to the User Guide for saving the trace measurement. Note that average Cable Loss: (peak + valley) / 2 is displayed in the status window.
