Tektronix TG8000 Service Manual

BG7 module adjustment procedures
15. Select the DAC G
ain (700 mV DC) calibration signal for BLACK 1 through
BLACK 4 as follows:
a. Press the left
(◄) or right (►) arrow button to select BLACK 1,andthen
press the ENTER button.
b. Press the le
ft (◄)orright(►) arrow button to select CAL : DAC Gain
(700mV DC), and then press the ENTER button.
c. Press the BA
CK button.
d. Repeat parts a through c of this step to select the calibration signal for
BLACK 2 thr
ough BLACK 4.
16. Locate variable resistor R481 on the BG7 circuit board. (See Figure 8-1.)
17. Adjust R481 so that the output gain is 700 mV ±1 m V.
18. Change the BNC cable connection from the BLACK 1 connector to the
BLACK 2 connector on the BG7 module.
19. Locate variable resistor R581 on the BG7 circuit board. (See Figure 8-1.)
20. Adjust R581 so that the output gain is 700 mV ±1 m V.
21. Change the BNC cable connection from the BLACK 2 connector to the
BLACK 3 connector on the BG7 module.
22. Locate variable resistor R681 on the BG7 circuit board. (See Figure 8-1.)
23. Adju
st R681 so that the output gain is 700 mV ±1 m V.
24. Change the BNC cable connection from the BLACK 3 connector to the
BLA
CK 4 connector on the BG7 module.
25. Locate variable resistor R781 on the BG7 circuit board. (See Figure 8-1.)
26. Adjust R781 so that the output gain is 700 mV ±1 m V.
T
o adjust chroma gain (Option CB only)
Preparation
To perform the chroma gain adjustment, you must first remove the top cover of
t
he TG8000 mainframe. (See page 2-25, Top cover.)
After you have removed the top cover, find the variable resistors on the BG7
circuit board. (See Figure 8-1.)
TG8000 Multiformat Test Signal Generator Service Manual 8–5

Tektronix TG8000 Specifications

General

Brand	Tektronix
Model	TG8000
Category	Portable Generator
Language	English