Receiver Logic Input Voltages - Nokia 2125 Troubleshooting Manual

Nokia Customer Care

Receiver Logic Input Voltages

Following are the measure logic levels for the Rx front end (N7160).
Table 8 includes the logic level values for the Rx front end.
Mode
Cell CDMA high gain
Cell CDMA low gain
PCS CDMA high gain
PCS CDMA low gain
AMPS high gain
AMPS low gain
If the logic levels are significantly off (+/- 0.2 V), replace the N7160 and re-measure. If
the voltages are still out of specifications, refer to the Baseband Description and
Troubleshooting chapter.
ISSUE 1 08/2005
Figure 19: Rx logic input voltages
Table 8: Rx Front-end Logic Levels
IF_SEL
0 V
0 V
0 V
0 V
2.76 V
2.76 V
©2005 Nokia Corporation
2125/2125i/2126/2126i/2128i (RH-71)
RF Description and Troubleshooting
1
Logic Input Voltages
1 2
BAND GAIN_CTL
0.1 V 2.75 V
0.1 V 0 V
2.68 V 2.75 V
2.68 V 0 V
0.1 V 2.76 V
0.1 V 0 V
Company Confidential
2
3
3
Page 27