Bird Technologies SK-4000-TC-Manual - Manual (Page 26)

14
Cable Loss Measurement
Ensure that the cable being tested is unterminated (not connected to anything
at the far end).
Note: Ensure that the cable does not have power greater than +23
dBm.
Note: Ensure the frequency band of the system is known.
Performing a Cable Loss Measurement
1. Press CableLoss.
Figure 9 Set Up for Cable Loss Measurement
Figure 3.8 Set Up for Cable Loss Measurement
1
2. Set the frequency start and stop to a range that is well beyond the normal
range of the antenna. "Setting the Measurement Frequency" on page 9.
Example - For a 450 MHz antenna, set the start frequency at 400
and the stop frequency at 500 MHz. For an 800 MHz antenna, set
the start frequency at 700 and the stop frequency at 1,100 MHz.
3. Connect a phase stable cable to the SiteHawk Analyzer antenna test port.
4. Connect a Cal Combo to the other end of the cable.
5. Calibrate the SiteHawk Analyzer. See “Calibration” on page 7.
Note: After Calibration, with the load still connected, the Output
must be below -25 dB. If not, there may be an issue.
6. Remove the Cal Combo unit from the cable.
7. Connect the phase stable cable to one end of the cable under test.
8. Connect the Short connection on the Cal Combo unit to the other end of
the cable being tested.
9. Wait at least 10 seconds to allow the trace to update.
10. Hold the trace on the screen. See “Trigger” on page 21.