Synthesizer Troubleshooting; Synthesizer Setup - Nokia RH-57 Series Troubleshooting Manual

2112 (RH-57)
Troubleshooting - RF

Synthesizer Troubleshooting

Faulty synthesizers can cause both Rx and Tx failures during tuning, in addition to the
VCTCXO tuning. The following synthesizers are incorporated into the 2112 (RH-57):
• UHF (cell) PLL inside Jedi IC (N601)
• Tx VHF (457.2MHz) with PLL in Jedi IC in Cell Mode
• Tx VHF (527.2MHz) with PLL in Jedi IC in PCS Mode
• Rx VHF (367.2MHz) with PLL in Yoda IC

Synthesizer Setup

Use the following steps to set up the phone for Tx troubleshooting in Phoenix.
1. Open the Phone Control dialog box.
2. Click the LOCAL button in the Phone State area to put the phone into Local
Mode.
3. Use the following settings for the Band, Channel, and Mode fields on the RF
Main Mode dialog box:
• UHF: Use the Rx/Tx mode and channel 384 in Cell band. This allows you to
check power in both the Rx and Tx circuits.
• Rx VHF: Use the Rx mode. One band is enough.
• Tx VHF: Use the Rx/Tx mode in Cell band.
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Figure 20: Phone Control dialog box for Tx troubleshooting
©2004 Nokia Corporation
Nokia Customer Care
Company Confidential Issue 1 07/2004