User Manual

AS4000 Survey Tool
605-0000-429
Issue 1.6. Date 1/9/99
DLP-004
Page 1 of 4
PANNING THE CRU
The following procedure will have to be completed before placing the AS4000
system into service. All results must be entered on the Survey Test Result form, see
DLP-005.
STEP PROCEDURE
1. CRU Characterisation
The CRU has a characterisation label fixed to the CRU back plate. This label records factory
measured readings of TX PC and RX AGC Volts for different set levels.
2. AGC Voltage Recording
Check the label on the CRU to get an indication of the receive signal strength from the
characterised readings to ensure that the required fade margins are attained; The higher the
voltage the stronger the signal.
-98
-92
-88
RECEIVE SIGNAL
STRENGTH /dBm
AGC DIGITAL
VOLTMETER
READING
Figure 13. Label Detail: Receive AGC