ASMxxxx Series User’s Manual
Asia Pacific | EMEA | Americas 124
TX PORT 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 this Tx
Port VSWR Calibration process need not be performed.
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 Calibration – Tx Port process first, then select a channel in the middle of the
frequency range and then check the “Enabled” box on the Calibration – Tx Port screen.
Tx Port Calibration screen
Then select the “Calibrate” button and the screen in the following section of this manual will appear after a prompt.
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General