CCS Technical Documentation
Troubleshooting
RH-10
Issue 1 09/2002
Nokia Corporation Confidential
Page 19
TN TX Limiting Cell CDMA2000: Po
This is the same as the previous tuning (
TN TX Limiting Po Cell IS95, Low channel (or
LowMid, MidLow, Mid, MidHigh, HighMid or High channel)
), except that CDMA2000
(C2K) modulation is used instead of IS95.
For an explanation of result, see the previous tuning.
Manual Verification:
Same as the previous tuning, except choose the CDMA2000 tuning
in the RF Tuning dialog box.
Troubleshooting:
Same as previous tuning.
TS ACPR Cell — Low
See the description for PCS ACPR. In cell band, however, the offset is -0.9 MHz
(+0.9 MHz).
Manual Verification:
Set up the measurement as described in
section 42.3
but turn on
the Cell transmitter to channel 384. Likewise, use the TxdBCtr value for Cell TX Limiting
on channel 384 in IS95 mode. Measure at the center frequency of 836.52 MHz, and the
offset of +/- 0.9 MHz.
Troubleshooting:
Refer to
section 42.3
and also the Cell TX troubleshooting guide. Cell
band TX decoupling capacitors are C653, C633, C649, C648, C619, C841, C817, C810,
C811, C803.
TN RX IF AGC RXdBCtr (0) [or (1) or (2)]
This tuning calibrates the RX IF AGC curve, because the output power of the IF part of
the Batman IC is not a linear function of RX_IF_AGC. The tuner injects three known sig-
nal power levels into the phone’s receiver and, for each one, the phone’s AGC algorithm
adjusts the RX_IF_AGC to get the same amplitude at the output of Batman (although
different amplitudes are going in). From these three points, curve fitting is used to inter-
polate between measurement points.
The result is a value of RxdBCtr (which corresponds to a value of RX_IF_AGC) for each of
three CW input powers injected into the receiver:
-87.5 dBm, -57 dBm, and -18 dBm
Manual Verification:
With the phone in local mode, use the Main Mode dialog to turn on
the AMPS receiver set to channel 384. Using the RF Tuning dialog, perform the manual
tuning three times—each time injecting the CW signal at the amplitudes listed above;
one amplitude per tuning. Each time, record RxdBCtr—which is returned by Phoenix dur-
ing the manual tuning. For the manual tuning, use the RF Tuning dialog box with
“mode”= RF Tuning, and choose the appropriate tuning name. Ensure that the resulting
value of RxdBCtr is within the limits in the tuning results file.
Troubleshooting:
While injecting a signal into the receiver, check the values of RSSI and
