ASMxxxx Series User’s Manual
Asia Pacific | EMEA | Americas 125
10.48 VSWR Calibration
This page is used to set up the VSWR Calibration algorithm for VHF, UHF and 700/800/900MHz systems utilising “legacy”
model bi-directional couplers.
The ASM is equipped with an algorithm to improve the “at the antenna” VSWR measurement for installations utilising these
“legacy” model couplers. This algorithm compensates for some of the feeder system frequency and phase variables present
during VSWR measurement and is not required, and should not be used, for site installations using “current” model dual-
directional couplers. For site installations using “current” model couplers, the VSWR Calibration Enabled box should remain
unchecked, and the Tx Port VSWR Calibration process need not be performed.
Reported Fwd Pwr & Reported Rev Pwr:
The result of the last signal power level measurements in dBm.
To update to the latest measurements, click the Refresh button.
Cancel:
Exits the VSWR Calibration page without saving any changes and returns to the Tx Port Calibration page.
Apply:
This applies the VSWR Calibration algorithm. Use the Enable setting on the Tx Port Calibration page to control usage of the
algorithm in VSWR calculations.
TX PORT VSWR CALIBRATION:
To perform the VSWR Calibration, complete the RECOMMENDED CALIBRATION PROCEDURE in the previous section of this
manual.
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