Tn Tx Gain Comp Cell (Or Pcs) Po Md (Or Lo, Lm, Ml, Mh, Hm, Or Hi) - Nokia NPD-1 Series Troubleshooting - Rf

NPD-1
Troubleshooting — RF
PDM for TX RF AGC
-512 decimal
-67 decimal
-22 decimal
+418
+511
Troubleshooting: Check Robin (N801) according to Tables 1, 2, and 3. Also check D400,
which generates the PDM signals. Check AGC PDM voltages according to Table 1. Trou-
bleshoot the rest of the cell transmitter, if needed, according to Table 2.

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

Description for this and next tuning: This tuning ensures that the value of TxdBCtr cor-
rectly 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 the
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 chan-
nel 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 window.
Using the Phoenix RF Tuning window, 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 20
Nokia Corporation
CCS Technical Documentation
Acceptable range for output
power (in dBm)
check limits in tuning results file
Confidential Issue 1 11/2002