User Guide

CC Technical Documentation Troubleshooting - Baseband
RM-11
Issue 1 02/2004 ©2004 Nokia Corporation Confidential Page 31
level is found, the tuning system stops and the Found Flag bit is set to HIGH. If a band
limit was reached during the search, the tuning system stops at the band limit, the Band
Limit flag bit is set to HIGH, and the Found Flag is set to HIGH.
While the WRITE/READ is LOW, data can be read by the UPP. At the rising edge of the
BUS Clock, data will be shifted out of the register. This data is available from the point
where the bus clock is HIGH until the next rising edge of the clock occurs.
The stereo audio output signal is fed to the stereo amplifier. Volume control of the FM
audio signal is made by circuitry inside the amplifier. An amplified audio signal is fed to
the headset or IHF speaker. The headset is also used as an antenna input for the radio.
FM Radio Test
To hear the FM radio, first connect a headset to the Tomahawk or UHJ ports because the
headset will be an FM radio antenna. Then, connect the headset to a UHJ port to control
the FM radio by using Phoenix. If you connect a headset (such as HDS-3) to the Toma-
hawk connector, you can not control the phone because you have already occupied the
connection port (Tomahawk). In this case you have to have jumper wires on production
test points (Fbus Tx/RX,GND).
Input Signals to FM Radio
After connecting a headset to the UHJ port to control the phone through Phoenix, you
can see signals by turning on the FM radio in Phoenix. The FM radio menu is under the RF
menu in Phoenix.
• FMClk — Test Point (FM04) : 32 KHz/1.8 V
• FMWrEn — Test Point (FM03) : Write enable at 1.8 V
• FMCtrlClk — Test Point (FM02) : Control clock at 1.8 V
• FMCtrlDa — Test Point (FM01) : Control data at 1.8 V