Tektronix TG8000 Service Manual

AVG7 module adjustment procedures
6. Restart the ins
trument in Factory mode:
a. Press and hold the MODULE, ENTER,andFront Panel ENABLE
buttons simul
taneously.
b. Continue holding the buttons until the message TG8000 Booting...
displays.
c. When the message TG8000 Booting... displays, release the MODULE
and ENTER bu
ttons. Continue holding the Front Panel ENABLE
button.
d. When the me
ssage TG8000 Start up with Factory Mode displays,
release the Front Panel ENABLE button.
7. Select th
e 525 GBR signal format as follows:
a. Press the MODUL E button to display the AV G 7 main menu.
b. Press the FORMAT buttontoselect525 GBR, and then press the
ENTER button.
c. Press the COLOR BAR button.
8. Select the DAC Test calibration signal as follows:
a. Press the up (▲)ordown(▼) arrow b utton to select CALIBRATION.
b. Press the left (◄)orright(►) arrow button to select DAC Test,andthen
press the ENTER button.
c. Press the ENTER button again to confirm the signal output.
9. Sel
ect the Sync ON All Channels mode as follows:
a. Press the up (▲) or down (▼)arrowbuttontoselectVIDEO,andthen
pr
ess the ENTER button to access the VIDEO submenu.
b. Press the up (▲
) or down (▼) arrow button to select GBR SYNC.
c. Press the left (◄)orright(►)arrowbuttontoselectSync ON All
Channels, and then press the ENTER button.
10. Locate variable capacitors C835A, C735A, and C635A, and variable resistors
R835A, R735A, and R635A on the AVG7 c ircuit board. (See Figure 6-6.)
11. Turn the LEVEL knob on the peak detector amplifier so that the green LED
lights.
12. Adjust C835A so that the signal amplitudes of 500 kHz and 5 MHz are at the
same level. (See Figure 6-8.)
6–12 TG8000 Multiformat Test Signal Generator Service Manual

Tektronix TG8000 Specifications

General

Brand	Tektronix
Model	TG8000
Category	Portable Generator
Language	English