Tektronix PSC1125, Instruction Manual

Page: 38 / 92

Performance Verification
4-6
PSC 1125 Digital Television Parallel-to-Serial Converter Instruction Manual
Only trained service technicians should perform the following procedure.
Use the test hookup and equipment controls from the previous test.
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.
1. Change the internal jumper setting 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. Locate J400 on the A10 board and confirm that no jumpers put onto the
jumper pin pairs 3–4 and 5–6. Refer to Setting Sound Packet section for
more information about the jumper configuration.
d. Reconnect the AC power cable to the AC Power line connector.
2. Press the FORMATS button on the TSG1001 generator front panel to set the
FORMATS to SMPTE 274M/59.94Hz.
3. Set the digital TV waveform monitor format setting to SMPTE 240M/274M.
4. On the digital audio monitor front panel, press the MENU button to display
the menu.
5. Select input items from the menu, and select “CH1–2 input: BNC-unbal-
anced” and “CH3–4 input: BNC-unbalanced” items from the submenu.
6. On the digital audio monitor front panel, press the CLEAR MENU button to
clear the menu.
7. On the digital audio monitor front panel, press the CH STATUS button to
display CHANNEL STATUS view.
8. In the view, check CRC errors are not displayed.
9. On the digital audio monitor front panel, press the VIEW AUDIO button and
SESSION button to display AUDIO/SESSION view.
Embedded Audio Check