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Maintenance and Performance Checks 5-16
2.
Make the following connections:
a. Connect function generator output to the input of the
50
S
“T”Connector.
b. Connect one end of the 50
S
“T” Connector to the
3152 TRIG IN and the other end to the counter
Channel A input.
c.
Connect the 3152 OUT to the counter Channel B
input.
3.
Set counter to phase measurement. Terminate counter
inputs with 50
S
.
4.
Set Pulse/Function generator to output a 2 Vp-p, 10KHz
square waveform.
5. Adjust R535 for a counter reading of 45
E
±3
E
. Note and
record the exact counter reading for the next adjustment.
6.
Set Model 3152 PHAS2:FINE to 36. Adjust R537 until
reading
falls within the following reading:
Value recorded in step 5 + 36 ±2
E
.
Troubleshooting
The troubleshooting instructions contained in this section are
intended for qualified personnel having basic understanding of
analog and digital circuitry. The individual should also be
experienced at using typical test equipment as well as ordinary
troubleshooting procedures. The information presented here has
been written to assist in isolating a defective circuit or circuit
section. Isolation to a specific component is left to the technician.
Recommended Test
Equipment
Recommended test equipment for troubleshooting and adjustment
of the Model 3152 are listed in the section entitled Recommended
Test Equipment in the beginning of this chapter. Other equipment
such as a logic analyzer, an in-circuit emulator, etc., could also be
helpful in a difficult situation.
Power-Up Tests
Upon power-up, the Model 3152 performs a set of tests. If the
instrument locks up after power on, proceed with the
troubleshooting procedure given in the following paragraphs
Self-Test
An advanced feature of the Model 3152 is its self-test capability.
This feature helps in reducing troubleshooting time of faulty circuits
to the minimum. If the instrument fails its self-test procedure, it will
generate an error bit. *TST? initiates the self-test procedure. If the
instrument executes its self-test without errors, 0 is placed at the
output queue. Non-zero indicates self-test failure.
The self-test procedure is intended to verify general operation of
the Model 3152. It does not test for accuracy. Therefore, it should
be used as an indication that the Model 3152 operates, in general.
The self-test procedure checks about 95% of the Model 3152
hardware. If the self-test procedure fails to respond correctly,
troubleshooting the Model 3152 is suggested using the procedure
given below.
Содержание 3152
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