User Guide

2115i/2116/2116i (RH-66)

RF Description and Troubleshooting

Table 5 includes the descriptions and values for Rx DC troubleshooting test points shown

in Figure 16.

Receiver RF Test Points

For the test points in Figure 17, an external signal source of –25 dBm was injected to the

RF input. The signal was then traced throughout the receiver chains. An Agilent 8960 call

box is recommended. (Open Call Setup, press the Active Cell soft button, and then

select CW.)

Inject a continuous wave (CW) signal for PCS (1960MHz) or Cell/AMPS (881.52MHz) at a

fixed –25 dBm power level. Measurements were taken with the AAS-10 RF Probe. Signal

levels are approximate, and the accuracy may be +/- 2 dB or more depending on the

probe position and grounding.

Table 5: Rx DC Test Points

Test

Point

Description Value

1 LO Vdd 2.6 VDC LO Amp Vdd supply lines for Cell and PCS

2 RFA Vdd 2.8 VDC RF Amp Vdd supply line for Cell band

3 C_LNA Vdd 2.8 VDC External Vdd supply line for Cell LNA

4 P_LNA Vdd 2.8 VDC External Vdd supply line for PCS LNA

5 IFA Vdd 2.8 VDC IF Amp Vdd supply line for CDMA and AMPS IFs

6 IFA Vdd 2.8 VDC IF Amp Vdd supply line for CDMA and AMPS IFs

7 RX LO lock voltage 1.2 to 1.7 VDC