User Guide

6235/6235i/6236i (RM-60)

RF Description and Troubleshooting

Figure 31: Receiver IQ Level on AMPS band

Figure 32 shows the AMPS spectrum and the test points located on the top side of the

main PWB. All four test points should be approximately equal. WARNING: Direct current

is present on these test points.

Figure 32: AMPS spectrum and the test points on the top side of the main PWB

Checking Cell Receiver from RF to IQ

Use the following values to check the Cell receiver functionality RF to IQ output.

1. Start Phoenix in Local Mode with only the Rx path turned on.

2. Inject a –75dBm CW signal of 881.82MHz (i.e. 300kHz offset from 881.52MHz or

10 channels away).

Rx_IP

Rx_IN

Rx_QP

Rx_QN