Tn Amps Pl3 (Or 4, 5, 6, Or 7) Po; Tn Tx Limiting Po Cell Is95, Low Channel (Or Lowmid, Midlow, Mid, Midhigh, Highmid, Or High Channel) - Nokia RH-10 Series Troubleshooting Manual

RH-10
Troubleshooting

TN AMPS PL3 (or 4, 5, 6, or 7) Po

This procedure tunes power levels 3 through 7, all on the center channel. (Power level 0
was tuned in the previous test. Power levels 1 and 2 are the same as 0 for this phone.)
The result is measured trasmit power in dBm for power levels 3 through 7 on
channel 384.
Manual Verification: Use the same procedure as in the previous tuning (TN AMPS PL2
Po Mid (or Low, LowMid, MidLow, MidHigh, HighMid, or High)), but on channel 384
note that the limits are different from the previous tuning.
Troubleshooting: Trouble the cell transmitter, setting the AGCs as in Table 1 for the power
level that failed.
TN TX Limiting Po Cell IS95, Low channel (or LowMid, MidLow, Mid, MidHigh,
HighMid, or High channel)
This tuning provides an upper limit on the transmit power while in Cell IS95 mode. The
reason for this is to ensure that the phone never violates the SAR (Specific Absorption
Ratio) limit, which is a health and safety specification that limits the amount of radia-
tion near the user's head. The phone is set to transmit and TxdBCtr is adjusted for the
maximum transmit power.
The result is a power level in dBm, which is the maximum allowed. This is done on each
of the seven channels.
Manual Verification: Using Phoenix, set the phone to local mode; then turn on the Cell
transmitter set to each of the channels in the following list.
Using the RF Tuning dialog box, adjust TxdBCtr in the "values" dialog box until the TX
power—measured on the RF connector with a spectrum analyzer—is within the limits on
each of the following channels.
Troubleshooting: If the maximum cannot be reached, either a component in the trans-
mitter has too much loss, or not enough gain. Troubleshoot the Cell transmitter with the
phone set to the same channel as the failed channel.
Page 18
Channel
Low
LowMid
MidLow
Mid
MidHigh
HighMid
High
Nokia Corporation
CCS Technical Documentation
Cell
991
107
245
384
512
660
799
Confidential Issue 1 09/2002