Skanti DSC 9001, Technical Manual, Page: 165 / 178

Step no. 16 Rx signal path test.
Tests Rx Signal Path PCB 915.
The pre-selector and the synthesizer is set-up so no signal passes the receiver. The AF Detector at
the output checks that no signal is present.
Pre-selector: PRE 0
Band: 67.5 - 75 MHz
1. LO: 75.0000 MHz
3. LO: 456.7 kHz
The test is OK if AF CHECK=1
Error code Possible error source
1601 PCB 915 or cable
1602 RSP AF cable or PCB 717
Step no. 17 Rx signal path test.
Tests Rx Signal Path PCB 915.
By choosing the right synthesizer frequency the signal passes the 45 MHz filter and is mixed to a
1.7 kHz tone in the audio part of the receiver. The AF Detector at the output checks that signal is
present.
Band: 45 - 52.5 MHz
1. LO: 44.99900 MHz
3. LO: 456.7 kHz
The test is OK if AF CHECK=0
Error code Possible error source
1701 PCB 915 or cable
1702 RSP AF cable or PCB 717
Step no. 18 EEPROM test
Tests Programmable Communication Processor PCB 717.
Checks and re-writes the EEPROM.
The test is OK if the checksum is correct.
Error code Possible error source
1801 PCB 717
SELF-TEST SERVICE
DSC 9000 TECHNICAL MANUAL 5-13