Rx Agc (Cell Mode) - Nokia RH-77 Troubleshooting Manual

2118 (RH-77)
RF Description and Troubleshooting

Rx AGC (Cell mode)

The following Rx RF AGC PDM vs. AGC Voltage table shows the Rx RF AGC PDM vs. AGC
voltages in local mode on channel 384.
Conn RF Pin CELL RF AGC
-25 1.492
-35 1.298
-45 1.159
-55 1.019
-65 0.861
-75 0.705
-85 0.530
-92 0.425
-95 0.633
-100 0.594
-105 0.524
Page 28
Table 15: Rx RF AGC PDM vs. AGC Voltage
PDM Typical Value
-512 0.08
-400 0.260
-300 0.436
-200 0.597
-100 0.753
0 0.913
100 1.076
200 1.24
300 1.403
350 1.494
400 1.570
500 1.740
511 1.761
UNITS VDC
Table 16: Rx AGC vs. RF Pin for CELL Band
Comments
In Normal mode, the mobile terminal will adjust RF RX AGC
Rx power is coming in, the I and Q will be about 0.5Vpp and 1.3V
Approximately 1pdm per 1mV
Note the reduced delta because the LNA is switched on
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Company Confidential Issue 01 04/2005