User Guide

Technical Documentation
NHD–4
System Module
P.A.M.S
Page 4–33
Original 11/97
RX_ICT
RX_ICT is the control current to the CDAGCR IC (N1).
RX_IREF
RX_IREF is the reference control current to the CDAGCR IC (N1).
RX_OFFSET
RX_OFFSET is a PDM voltage. CDSB ASIC (D704) pin 123, this PDM
will vary from 0 to 3.15 V when moved over its dynamic range. The ASIC
side of R712 would be another good probe point.
TX_GAIN
TX_Gain originates at pin 5 of the CDRFI, and is used for CDMA TX Gain
control.
TX_ICT
TX_ICT is the control current to the CDAGCT IC (N100).
TX_IREF
TX_IREF is the reference control current to the CDAGCT IC (N100).
TX_OFFEST
TX_OFFSET is a PDM voltage. Measured at the CDSB ASIC (D704) pin
120, this PDM will vary from 0 to 3.15 V when moved over its dynamic
range. The ASIC side of R711 would be another good probe point.
TXB
TXB is a PDM voltage. When measured at its origin, pin 122 of the ASIC,
this PDM will vary from 0 to 3.15 V when moved over its dynamic range.
The ASIC side of R703 would be another good probe point.
TXI
The TXI signal is a voltage originating from the Detector (V114). TXI will
be approximately 1.0 V when the phone is transmitting at maximum
power. Note: It is important to never read TXI at the detector, pin 1.
Doing so will load this device down. TXI should be read from N202, pin 1
or 2.
TXI_REF
TXI_REF is a PDM voltage. When measured at its origin, pin 126 of the
ASIC, this PDM will vary from 0 to 3.15 V when moved over its dynamic
range. The ASIC side of R702 would be another good probe point.
VBAT
VBAT is the battery voltage.