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APMxxxx Series User's Manual
10.46 Calibration – Rx Port
Rx Subsystem Gain (Loss):
This field previously appeared under Configuration – Antenna Isolation in earlier firmware versions.
The combined value of the receive antenna coaxial cable feeder insertion loss, TTA or Receiver Multicoupler gain (or loss) and
an separate preselector or post-filter.
The value of the nett gain (or loss) of the Receiver subsystem should be entered here. This value represents the sum of the
insertion losses of the various elements of the receiver subsystem and the gain of its amplifier elements (if any).
Examples of this may be;
or;
The Rx Subsystem loss considers all of the Rx subsystem components that determine the Rx signal level as seen by the base
station receivers on the site.
Receiver Feeder loss
Receiver Preselector loss
Receiver Multicoupler gain
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Rx Subsystem Nett Gain
TTA Preselector loss
TTA Amplifier gain
Receiver Feeder loss
Receiver Multicoupler Divider loss -10.0 dB
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Rx Subsystem Nett Gain
Asia Pacific | EMEA | Americas
-3.0 dB
-1.0 dB
+7.0 dB
+3.0 dB
-1.0 dB
+20.0 dB
-3.0 dB
+6.0 dB
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