HP 8924C Assembly page 589

Table 126
Measurement
Auto Range
Attenuator
Counter with
TTL Divider
Counter with
ECL Divider
Temperature
Sensor
N:\mkt\MANUALS\HP8924C\ALR\diagnos.fb
A5 Input Tests (Continued)
Explanation and Suggestions
See Path 4, Node 5 infigure 71 on page
Auto Range Attenuator is programmed to its 3
possible values (+20 dB, 0 dB and -20 dB). At
each setting the output detector is read.
See Path 4, Node 6 in figure 71 on page
signal from the signal generator's synthesizer is
routed to the counter TTL prescaler. The fre-
quency of the signal is set to all values between 1
and 51 MHz in 5 MHz steps. The count returned
is the actual frequency in kHz, divided-by-16.
See Path 4, Node 7 in figure 71 on page
signal from the signal generator's synthesizer is
routed to the counter's ECL prescaler. The fre-
quency of the signal is set to all values between
50 and 1000 MHz in 50 MHz steps. The count
returned is the actual frequency in kHz, divided-
by-256.
See Node 8 in figure 71 on page
perature Sensor produces a DC voltage propor-
tional to the internal temperature. The scale
factor is 10 mV/°C
Chapter 14, Diagnostics Descriptions
Description of RF Diagnostics (RFDIAGS3)
591. The DVM:FILTER_OUT_DET
591. The Counter:INPUT_TTL_COUNT
591. The Counter:INPUT_ECL_COUNT
591. The Tem- DVM:TEMP_SENSE
Measurement Point
589