Voltage/Frequency (V/F) Board - Teledyne 9110AH Instruction Manual

TELEDYNE Model 9110AH NO
Now set the baud rate of the Analyzer to the speed required by the modem and it should work.
If you are still experiencing problems, a cable adapter may be needed. Please contact the factory
for assistance.

9.3.3 Voltage/Frequency (V/F) Board

The V/F Board consists of 16 analog input channels, each software addressable, 8 digital inputs,
and 24 digital outputs, each independently addressable, and 4 independent analog output
channels. The analog input channels are connected to a V/F converter capable of 80,000 counts,
which is approximately 16 bit resolution. The integration period is software selectable from 40
msec to 2.4 secs. Commands from the SBC40 computer and digitized values from the V/F
section of the board are sent via the STD bus interface. The schematic for the board is in the
Appendix.
The overall operation of this board is quite complex, to fully check it out in all of its
operational modes is not possible in the field. Therefore a few of simple tests are described
here that test one analog input channel, the 4 analog output channels, one digital input, and one
digital output.
1. V/F board analog input test.
Each analog channel is routed through a programmable 16 channel multiplexer. Chances are
that if one channel works, they all work.
A. Turn on instrument.
B. Press TEST key on front panel keyboard until DCPS test is displayed.
C. The value displayed should read 2500 ± 200 mV.
If the M9110AH passes this test, it has successfully digitized a 2500 mV composite
voltage output from the Power Supply Module. The signal should also be quiet ± 25 mV.
2. Analog output channel test.
In the DIAGNOSTIC menu on the front panel, there is a test that outputs a step voltage to
the 4 analog outputs. This test is useful for calibrating chart recorders and dataloggers
attached to the M9110AH. The test can also be useful in diagnosing faults in the V/F board.
Analyzer Operator Manual, 01620, Rev. F
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