User Manual

AS4000 Release3 and Release 4 Central

Terminal Installation and Commissioning

DLP-015

605-0000-432

Issue 1.3a Date 18th October 1999

Page 5 of 8

c) Connect the AC Mains supply cable to the AC PSU and power up the unit at the

mains supply outlet socket.

UP Link

Cable to

CT Rx

Down Link

Cable from

CT TX

ACPSU

TEST CRU

TEST

TELEPHONE

Figure 38. Test CRU Connections.

6. Setting Of RX Gain Control.

a) On 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.

Figure 39. RF Gain Settings

b) Ensure that the Test CRU has acquired an RF link. The RF link has acquired when

the Red, RF Link Fail LED is extinguished on the respective modem under test and

the small amber LED’s on the modem board are on.

c) Take the test phone off hook to achieve correct power levels.