User Manual

AS4000 Release3 and Release 4 Central
Terminal Installation and Commissioning
DLP-017
605-0000-432
Issue 1.3a Date 18th October 1999
Page 4 of 6
Power
Meter
ST
Test
Unit
(X Band)
CT Rack
3
1 2
30dB
30dB
30dB 30dB
2:1
Splitter
2:1
Splitter
2:1
Splitter
SMA-N
RF Sensor
N-SMA
11dB
Variable *
Termination
DIP/LNA TX Filter
* Set variable attenuator to give an insertion loss of 106dB
between points A and B (nominal value of 5dB)
NTU NTU
ACPSU
If TX Filter not fitted
Terminate port here
Adapter
Female to
Female
A
B
C
Figure 45. Test Set-Up Modem Shelves (3.4-3.6GHz band)
14. Setting Of RX Gain Control (Test 6).
a) Connect the drop cable of the CRU and if using a voice CRU the telephony VF
pairs to the AC PSU.
b) Connect the AC Mains supply cable to the AC PSU and power up the unit at the
mains supply outlet socket.
c) On the Sitespan, select the Analogue/RF card window to set the Receiver Gain
control voltage in the RF Gain Adjust box. Click on the UP or DOWN buttons to
set the gain control voltage to 1.4 Volts.