Tn Tx Gain Comp Cell (Or Pcs) Po Md (Or Lo, Lm, Ml, Mh, Hm, Or Hi) - Nokia RH-10 Series Troubleshooting Manual

RH-10
Troubleshooting
Set the TX_IF_AGC to the value determined in tuning 24.3 above to give +11 dBm on the
output.
Change the TX RF AGC to the settings in the following table, and measure the TX power
levels. Check to see that they are within the specified range.
PDM for TX RF AGC
-512 decimal
-67 decimal
-22 decimal
+418
+511
Troubleshooting: Check Robin (N801) according to Tables 1, 2, and 4. Also check D400,
which generates PDM signals. Check AGC PDM voltages according to Table 1. Trouble-
shoot the rest of the cell transmitter, if needed.

TN TX Gain Comp Cell (or PCS) Po MD (or LO, LM, ML, MH, HM, or HI)

Both this tuning and the next (TN G_Offset Cell MD) ensure that the value of TxdBCtr
correctly corresponds to the absolute TX output power. On the midchannel, with TxdBCtr
set to a specified value, G_Offset is adjusted so that the output power is -8 dBm, and
that value of G_Offset is recorded (which is an absolute value) in the next tuning. (The
output power in dBm is recorded in this tuning.) After this is done on the midchannel,
the channel is changed to each of the other channels, and output power is reported.
(G_Offset is not adjusted on the other channels as it was on the center channel—just the
output power is recorded.)
The result is the transmitted power in dBm, which should be -8.0 dBm +/- 0.5 dB on the
center channel.
Manual Verification: Set the phone to local mode and program it to Cellular (or PCS)
CDMA RX/TX mode on channel 384 (or 600 for PCS), using the Main Mode dialog box.
Using the Phoenix RF Tuning dialog box, choose "mode" = RF Tuning, and choose this
test. Adjust G_Offset in the "values" dialog box line until the TX output power (measured
on the RF connector with a spectrum analyzer) is equal to -8.0 dBm +/- 0.5 dB. Use the
G_Offset limit range as a guide to which values to enter.
Once this is done on the center channel, change to each of the other channels and record
the power. Do not adjust G_Offset on the other channels—just record the power. It
should be within the limits listed in the tuning results file.
Page 16
Acceptable range for output power, in dBm
check
limits
in tuning
results
file
Nokia Corporation
CCS Technical Documentation
Confidential Issue 1 09/2002