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RM-164
RF Troubleshooting and Manual Tuning Guide
Figure 18 Some RF test points
Receiver troubleshooting
Introduction to RX troubleshooting
Rx can be tested by making a phone call or in the local mode. For the local mode testing, use Phoenix service
software.
The main Rx troubleshooting measurement is RSSI measurement. This test measures the signal strength of
the received signal. I and Q branches can be measured separately.
In GSM, the input signal can be either a real GSM signal or a CW signal that is 67.771kHz up from the carrier
frequency.
For service tool usage instructions, refer to section Service Tools and Service Concepts.
General instructions for RX troubleshooting
Steps
1. Connect a test jig to a computer with a FPS-10 flash prommer through F-Bus.
Note:
Make sure that you have a PKD-1 dongle connected to the computer's parallel port.
2. Connect test jig with DC supply voltage set to 4.0 V using Phoenix menu as shown next.
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