Tektronix TG8000

AVG7 module adjustment procedures
3. Set the oscillo
scope settings as indicated below:
Vertical scale
CH 1: 5 mV/div, CH 2: 1.00 V/div
Bandwidth
250 MHz (CH 1)
Horizontal scale
100 μs/div
Horizontal delay time
200 ns/div
Delayed runs time
993.472 μs(DelayedOnly)
Trigger position
50%
Trigger source
CH 2
Trigger type Edge
DPO (InstaVu)
Variabl
e Persistence: 500 ms
CH 2 waveform OFF
4. Set the test signal generator (ATG7 module) settings as indicated below:
Output selection BLACK 1
Signal format
PAL
Test signal
Field Reference
5. Select the CCIR17 signal of the AVG7 Generator module as follows:
a. Press the MODUL E button to display the AVG7 main menu.
b. Pre
ss the FORMAT button to select PAL-1, and then press the ENTER
button.
c. Pr
ess the OTHER button to select CCIR17.
6. Select the CH1/2/3: Composites video configuration as follows:
a. Press the up (▲)ordown(▼)arrowbuttontoselectCONFIGURATION,
and then press the ENTER button to access the C ONFIGURATION
submenu.
b. Press the left (◄)orright(►)arrowbuttontoselectCH1/2/3:
Composites, and then press the ENTER button.
7. Locate variable capacitors C837A, C737A, C637A, C804B, C704B, C604B,
C835A, C735A, and C635A, and variable resistors R835A, R735A, and
R635A. (See Figure 6-4.)
8. Rotate C837A, C737A, and C637A 180° from its initial position and set
R835A, R735A, and R635A to its center position.
6–8 TG8000 Multiformat Test Signal Generator Service Manual