Standard Bias Table - Motorola ASTRO XTS 3000 Service Manual

Standard Bias Table

9-6
Table 9-4, below, outlines some standard supply voltages and system
clocks which should be present under normal operation. These should
be checked as a first step to any troubleshooting procedure.
Table 9-4 Standard Operating Bias
Signal Name Nominal Value
UNSW_B+ 7.5Vdc
SW_B+ 7.5Vdc
+5V 5.0Vdc
+5VA 5.0Vdc
RESET 5.0Vdc
POR* 5.0Vdc
DSP_RST* 5.0Vdc
ADSIC_RST* 5.0Vdc
DCLK 33.0000MHz
ODC 2.4MHz
ECLK 1.8432MHz
IRQB* 8kHz
+5V 5.0Vdc
c
RX_5V 5.0Vdc
a. This is number may vary due to the operating mode of the radio when
it is measured. The ADSIC contains a divider which may divide the
clock by a modulus of 2. Therefore the actual frequency measured
may be clock/2 n . The most common frequency will be 16.5000MHz
nominal.
b. This 8kHz clock will be present only after the MCU has successfully pro-
grammed the ADSIC after power-up. This is a good indication that the
ADSIC is at least marginally operational.
c. Receive mode only.
Tolerance
6.0-9.0Vdc
6.0-9.0Vdc
±10%
±10%
+0.7, -1.0Vdc
+0.7, -1.0Vdc
+0.7, -1.0Vdc
+0.7, -1.0Vdc
a
±500ppM
±30ppM
±500ppM
b
±500ppM
±10%
±10%
Source
J101
Q106
U709
U710
U702
U726
U701
U406
ABACUS
U701
U406
U202
U106