User Guide

RM-11

Troubleshooting - RF (Part 2) CC Technical Documentation

Use the PDM settings from the previous section. Following are the approximate power

levels you should expect for the PCS band (Channel 600):

• C660 Output of Robin (N601), input to Hornet (N602)

Probed power ≅-2dBm (If not, then replace Robin)

• C627 Output of split-band filter (Z601)

(Gain ≅10.5dB – (filter loss 2.3dB) ≅ 8.2dB)

Probed power ≅ 7dBm (If not, then replace Hornet)

• C802 Output of the TX Switch (Loss ≅ 1dB)

Probed power ≅ +6dBm (If not, then replace the switch)

• C803 Output of PCS PA (use 10dB pad on probe or just sniff part)

Probed power ≅ +18dBm (If not, then replace the PCS PA)

• C809 IREF into PCS PA should be ≅ 2.7V (If not, trace back to Robin and then

to the BB)

Cell and AMPS Band TX Probe Points

Figure 20: Cell and AMPS band TX probe points