User Guide

PAMS
Technical Documentation
NHD–4
Disassembly & Troubleshooting
Page 43
Original 11/97
RF Node Powers – CDMA RX Mode
A high impedance passive RF probe may be used with a spectrum
analyzer to obtain the RF nodal power levels along the receiver chain.
The following levels assume the above probe and a –65 dBm, 881.52
MHz, unmodulated tone input into the receiver. Maintain a 1.0 MHz span
on the spectrum analyzer. A CDMA test box with spectrum analyzer
capabilities will do.
The RF power levels published below were found with a passive probe
with the 500 ohm tip. The blank column is reserved for values the user
will obtain with their own probe.
Node Frequency
MHz)
Power Lvl
HP10020A
500 ohm tip
(dBm)
Power Lvl
(your own)
(dBm)
CDAGCR IC N1 Pin 19 180 –24
CDAGCR IC N1 Pin 8 45 –61
CDMA SAW Output L6/L7/C63 45 –88
Diode Switch V10 pin 4/L8/L9 45 –57
1st IF Amp V9 collector, pin 1 45 –57
1st IF Amp base, pin 3 45 –80
Mixer T1 pin 4 – IF 45 –80
Mixer T1 pin 8 – LO 926.52 –19
Mixer T1 pin 5 – RF 881.52 –75
RF Switch N701 pin 7 – output 881.52 –75.5
RF Switch N701 pin 5 – input 881.52 –75.5
LNA V12 collector 881.52 –68
LNA V12 base 881.52 –90
RF Switch N702 pin 7 – output 881.52 –85.5
RF Switch N702 pin 5 – input 881.52 –85.5
Duplexor Z102, RX In pin 881.52 –92
Duplexor Z102, ANT pin 881.52 –89
Coax W400 – Antenna input 881.52 –87
Coax W400 – Connector input 881.52 –88