Motorola V200 Service Manual page 36

Troubleshooting
32
RX Audio Gain
This phasing procedure is used to phase the deviation that results from normal
audio levels.
Table 7. RX Audio Gain Test Values
Parameter
Test Voltage at Battery Terminals
Test Voltage at Acc. Connector
TEST_CHANNEL
MINIMUM_GAIN_SETTING
MAXIMUM_GAIN_SETTING
LOW_LIMIT
TARGET
HIGH_LIMIT
• Select the SUSPEND button to put the phone into Suspend Mode.
• Under CP_MODE, select the AMPS button to place the transceiver into Analog
call processing mode.
• Under the LOAD_SYN heading, enter desired channel and select the Set Chan
button to tune the UUT to the TEST_CHANNEL
• Under AUD_PATH heading, set Input to 1 and Output to 4, RX MUTE and
select SET.
• Set AUD_LVL to level 3.
• Under AUD_CTRL, select Sidetone OFF.
• Under COMPD, select Compander ON.
• Under SET_RF_PWR, set transceiver to power step 2.
• Under CARRIER, select ON to enable the analog carrier.
• See Figure 11.
• The test set should be configured as follows: 15 kHz LPF, 50 Hz HPF, 750 µSec
de-emphasis. Input a -50 dBm signal modulated with a 1 kHz audio tone at 2.9
kHz peak deviation into the UUT receiver. Set the audio analyzer to measure
RMS audio input
• Measure the audio level from the audio out pin of the accessory connector.
October 04, 2001
CDMA V200
Value
3.60V
4.40V
350
0
7
34.4mV
40mV
45.6mV
6881039B10