Tektronix PSC1125, Инструкция по эксплуатации

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Performance Verification
PSC 1125 Digital Television Parallel-to-Serial Converter Instruction Manual
4-11
5. Check that the OUT2 eye pattern displayed on the oscilloscope is fully open
(see Figure 4–3).
6. Retain the connections and controls when you go on to the next performance
test procedures.
Only trained service technicians should perform the following procedure:
In the following procedures, you remove the converter top cover and
access an internal module. Be sure to disconnect the power cable from the AC
power line connector when you remove or install the cover or when you access
the internal module.
To avoid serious injury, do not touch the exposed connections or
components when operating the instrument with the protective cover removed.
Dangerous potentials exist at several points within the converter.
Use the test hookup and equipment controls from the previous test.
1. Change the internal cable connection in the converter:
a. Disconnect the AC power cable from the AC power line connector.
b. Remove the top cover and shield cover. Refer to Top Cover and shield
cover in Removal and Installation Procedures on page 7–9.
c. Disconnect the cable connected to the HK-101 OUT 3 terminal and then
connect it to the HK-101 OUT 1 terminal (unused in normal operation).
For disconnecting and connecting the cable attached to the HK-101
module, refer to A10 Board and Connectors beginning on page 7–15.
d. Connect the AC power cable to the AC power line connector to turn on
the converter.
2. Check that the HK-101 OUT 1 output signal eye pattern displayed on the
oscilloscope is fully open (see Figure 4–3).
Check Eye Pattern for
HKĆ101 unused terminal