Tx Tx If 11 Dbm Set Cell Po; Tn Tx Rf Agc Cell Po (0) [Or (1), Or (2)] - Nokia NPD-4 Series Technical Documentation Manual

CCS Technical Documentation
PDM for PA AGC
+218 decimal
-12
-202
-268
-329
Troubleshooting: If the power readings are low, check the AGC voltages as in Tables 1
and 3. You can also probe on the PA input as in Table 2 to find out if the power level is
low going into the PA, or if the power level is correct going into the PA but the PA gain is
too low. If the power level going into the PA is too low, probe the TX chain at all the
other points prior to the PA listed in the table to see where the gain is lacking. When
that point is identified, check the soldering of all related components, and replace com-
ponents until the fault is found. If the power on the PA input is not low and the PA AGC
voltage is correct, similarly probe the power at all points after the PA to find the fault,
being extremely careful not to short the probing point to ground because this will
instantly destroy the PA. Visually check soldering first, and probe on PA output as a last
resort.

TX TX IF 11 dBm Set CELL Po

See previous tuning. This is the part of the previous tuning when the TX IF AGC is
adjusted so that the output power is +11 dBm
The result is a power in dBm. A perfect result would be +11.00 dBm.
Manual Verification: See previous tuning.
Troubleshooting: See previous tuning.
TN TX RF AGC Cell Po (0)
This tuning characterizes the RF AGC curve by entering PDM values to the RF AGC and
measuring the output power.
The results are TX power readings in dBm of the transmitted signal measured for each of
the listed PDM settings of the Cell TX RF AGC.
Manual Verification:
Turn on the cell CDMA transmitter in Phoenix using the RF Main Mode window, and set
it to channel 384. Set modulation to IS95 voice.
Set the Cell PA PDM to –329.
Issue 1 02/2003
Acceptable range for output
power (in dBm)
limit range for Po(5)
limit range for Po(4)
limit range for Po(3)
limit range for Po(2)
limit range for Po(1)
[or (1), or (2)]
Nokia Corporation
Troubleshooting — RF
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