Ericsson EF738 Service Manual page 70

9 RF CAL Calibrates the RSSI levels based on the level of the signal cur-
rently being received.
The value determined for each level is the minimum strength
signal for that level, averaged over 16 readings to provide a
more reliable value.
The value for level 0 is used to update the Receiver Carrier
Detect (RXCD) such that signals below this level are ignored.
This value (plus a fixed offset) also determines the minimum
signal threshold for the AFC.
When the received signal is below this threshold, the AFC pro-
vides TCXO compensation based on a default temperature com-
pensation table.
The values for level 1 and 5 are used to determine the RSSI
graph to display.
The values for level 2, 3 and 4 are interpolated from these two
reference levels.
M+# displays the next RSSI level number and its current value
M+S reads an averaged RSSI value and stores it
10 RX SENS Adjustment of the receiver audio output
M+# enables calibration and echoes the initial value
# / * increases/decreases the value by 1; new value is echoed
M+S stores the current value
11 KEYPAD Factory and level 5 repair only
13 BANDGAP Factory and level 5 repair only
14 AUDIO DEV Adjustment of the audio deviation
M+# enables calibration and echoes the initial value
# / * increases/decreases the value by 1; new value is echoed
M+S stores the current value
15 AFC Sets the AFC operating mode and displays AFC information
0
1
2
3
4
Any other code entered in handset mode will display:
ABCCDDEEFF where
A = AFC operating mode
0
1
2
3
4
only temperatue compensation
temp. + age compensation
temp. + age + freq. compensation, smoothed (default)
temp. + age + freq. compensation, no smooth
no compensation
only temperatue compensation
temp. + age compensation
temp. + age + freq. compensation, smoothed (default)
temp. + age + freq. compensation, no smooth
no compensation
Test/Service Programs
9