Power Control Loop; Amps And Tdma; Fig 43 Power Detection - Nokia RH-13 Series Troubleshooting Manual

CCS Technical Documentation

Power control loop

Basically, the power detection is done with Power detector module and power control is
done inside SAFARI. Power detection is similar for both bands, except both bands have
own coupler.
Is TXPWRDET vs.
output power OK?
See chart below.
Y
Is DAC value vs.
TXPWRDET (mV)
OK?
The detected voltages are illustrated in the following table and diagram.

AMPS AND TDMA

TXPWRDET values can be checked with Phoenix autotuning.
Table 3: TYPICAL DETECTED VOLTAGES AT POWER LEVELS PL2...PL10
800A
Pout TXPWRDET
PL dBm dac
2 25.7 450
3 23.3 301
4 19.3 179
5 15.3 107
6 11.1 60
7 7.0 33
8 - -
9 - -
10 - -
Issue 1 11/02
Figure 43: Power detection.
Check VR2 and
N
PATEMP .
Check C921, C922
and PWRDET
module.
N
Check UEM
(BaseBand)
800D
Pout TXPWRDET
mV dBm dac
27.3
23.3
19.3
15.3
11.1
7.0
- 3.0 18
- -1.0 8
- -5.0 3
ãNokia Corporation
Troubleshooting
Note !
See TXPWRDET vs. Output
power curve
1900
D
Pout TXPWRDET
mV dBm dac
27.3 503
23.3 304
19.3 182
15.3 105
11.1 57
7.0 30
3.0 15
-1.0 6
-5.0 2
RH-13
mV
Page 61