User Guide

CC Technical Documentation Troubleshooting - RF (Part 2)

RM-11

Alfred Receiver Troubleshooting

Figure 31: Alfred receiver troubleshooting layout

Things to keep in mind:

• There is a separate LNA for 800MHz (Cell and AMPS) and 1900MHz (PCS).

• Inside Alfred is the RFA again. There is a separate RFA for 800MHz (Cell and

AMPS) and 1900MHz (PCS).

• After RFA, there is a mixer and then the signals are separated by CDM (Cell and

PCS) and AMPS.

For example, if there is no IF frequency (128.1MHz), check both Cell and PCS. If

only one has at 128.1MHz (L753), check IF_Sel is working. If it is, then replace

Alfred (bad RFA).

• If Cell and AMPS are working fine, but PCS is not, look at the band select line and

the PCS LNA before replacing Alfred.