Forward Lna Channel Verification; Lna Output Level Verification; Lna Output Signal Alarm; Reverse Pa Channel Verification - Andrew 2400 Operation And Maintenance Manual

385700-4006-006
2.5.3.2

Forward LNA Channel Verification

Set the DLA direction to the forward direction.
2.5.3.2.1

LNA Output Level Verification

Attach either a signal generator (frequency = 2467 MHz) or a MDR to J3 (FWD OUT/RVS IN)
port of the Distribution Line Amplifier Assembly. Adjust the signal generator or BDR signal
level at J3 to -50 dBm ± 1 dB. Using a power meter verify that the signal level at the J4 (FWD
IN/RVS OUT) port of the Distribution Line Amplifier Assembly equals G
G is equal to the expected gain of the LNA channel. If the gain is not equal to G
lna
dB perform the steps outlined in section 2.5 for the LNA output adjustment. If after completing
the amplifier setup procedure the output level of the LNA channel is not G
all external test measurement cable losses are accounted for, the amplifier should be
replaced. Contact Andrew for additional information.
2.5.3.2.2

LNA Output Signal Alarm

This step assumes that the LNA output level has been set as explained in section 2.5.3.2.1
Attach a voltmeter to J4-2 on the Alarm I/O relay board (LNA output alarm test point). TP1 or
TP2 can be used as the ground connection. Remove the pilot tone cable from the LNA
module J5 Aux RF IN port port. Verify that J4-2 on the Alarm I/O relay board is < 0.7 VDC. If
J4-2 is > 0.7 VDC, perform the steps outlined in section 2.5 for the LNA output alarm
adjustment. If after completing the amplifier setup procedure the output alarm is not < 0.7
VDC with the previously set input level to J3, the amplifier should be replaced. Contact
Andrew for additional information.
2.5.3.3

Reverse PA Channel Verification

Set the DLA direction to the reverse direction.
2.5.3.3.1

PA Output Level Verification

Attach either a signal generator (frequency = 2417 MHz) or a BDR to J3 (FWD OUT/RVS IN)
port of the Distribution Line Amplifier Assembly. Adjust the signal generator or BDR signal
level at J3 to 0 dBm ± 1 dB. Using a power meter verify that the signal level at the J4 (FWD
IN/RVS OUT) port of the Distribution Line Amplifier Assembly equals G
G is equal to the expected gain of the PA channel. If the gain is not equal to G
pa
dB and the Distribution Line Amplifier has not been tested for the forward direction, perform
the steps outlined in section 2.5 for the PA output adjustment.
amplifier setup procedure the output level of the PA channel is not G
external test measurement cable losses are accounted for, the amplifier should be replaced.
Contact Andrew for additional information.
Document use is restricted to that described on cover
INSTALLATION
dBm ± 1 dB where
lna
dBm ± 1
lna
dBm ± 1 dB and
lna
dBm ± 1 dB where
pa
dBm ± 1
pa
If after completing the
dBm ± 1 dB and all
pa
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