M/A-Com P5100 Series, Руководство по установке

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MM102225V1, Rev. B
47
6.3
TOWER TOP LOW NOISE AMPLIFIER (TTA) GAIN
MEASUREMENT (REQUIRED)
The purpose of this test is to measure the gain of the TTA. The method will be to inject a
test signal into the transmit jumper cable using a
receive channel frequency . This signal
will be coupled from the transmit antenna to the receive antenna and a reference power
level measurement will be made with the TTA “On” and a second measurement will be
made with the TTA “Off”. This is a relative measurement and the difference will be the
TTA gain value.
STEPS ACTION
MISCELLANEOUS
1.
Select the RF GEN screen and configure
the following:
RF Gen Freq: Set as appropriate for
any assigned receive
frequency per SDO
(TX Freq –45 MHz).
Amplitude: 0dBm
Output Port: Dupl
AF Gen 1 & 2: Off
2.
Verify a test cable is still connected from
the transmit jumper cable (normally
connected to the Bird Power Monitor
output port) and the Duplex out port on
the HP 8920.
3.
Disconnect the Jumper at the TTA
Control Panel RF output labeled “ TO
RECEIVER MULTICOUPLER”.
4.
Connect a test cable between the TTA
Control Panel RF out port labeled “To
RECEIVER MULTICOUPLER” and the
Antenna In port of the HP 8920.
5.
Verify that the Power Switch on the
front of the TTA Control Panel is in the
“On” position.