Receiver Troubleshooting; Rx If - Nokia RH-57 Series Troubleshooting Manual

2112 (RH-57)
Troubleshooting - RF

Receiver Troubleshooting

Rx IF

Use Phoenix to perform the following steps for troubleshooting the receiver. Together
with the VCO frequency and level verification, this test should be the first test for a non-
working receiver. This test verifies the entire receiver chain, from input connector to
baseband output.
1. Inject a CW signal 881.82MHz or 881.22MHz (CH-384 offset by 300KHz) at a
fixed –75dBm power level. If you do not have a signal generator, use the CALL
BOX in AMPS mode on Channel 374 or 394 (10 channels away from
channel 384).
2. Open the Phone Control dialog box.
Figure 11: Phone Control dialog box for Rx IF troubleshooting
3. Click the LOCAL button in the Phone State area to put the phone into Local
Mode.
4. Select the following values on the RF Main Mode dialog box:
Band = Cell (CDMA)
•
Channel = 384
•
Mode = Rx
•
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©2004 Nokia Corporation
Nokia Customer Care
Company Confidential Issue 1 07/2004