Tektronix TG8000 Service Manual

AVG7 module adjustment procedures
16. Move the BNC cab
le from the upper CH 1 connector to the upper CH 2
connector on the AVG7 Generator m odule.
17. Locate variab
le resistors R751A (coarse) and R751B (fine) on the AVG7
circuit board. (See Figure 6-1.)
18. Adjust R751
A and R751B so that the output gain is 700.4 mV ±1 mV.
19. Move the BNC cable from the upper CH 2 connector to the upper CH 3
connector o
n the AVG7 Generator module.
20. Locate variable resistors R651A (coarse) and R651B (fine) on the AVG7
circuit bo
ard. (See Figure 6-1.)
21. Adjust R651A and R651B so that the output gain is 700.4 mV ±1 mV.
22. Move the BNC cable from the upper CH 3 connector to the upper CH 2
connector on the AVG7 Generator m odule.
23. Select the DAC Gain (YPbPr) : 0 mV calibration signal for CH 2 and CH
3 as follows:
a. Press the BACK button to display the CALIBRATION menu.
b. Press the left (◄)orright(►) arrow button to select DAC Gain (YPbPr),
and then press the ENTER button.
c. Press the left (◄)orright(►) arrow button to select 0mV, and then press
the ENTER button.
24. Locate variable resistor R757A on the AVG7 circuit board. (See Figure 6-1.)
25. Adjust R757A so that the output offset is 0 V ±1 mV.
26. Move the BNC cable from the upper CH 2 connector to the upper CH 3
connector on the AVG7 Generator m odule.
27. Locate variable resistor R657A on the AVG7 circuit board. (See Figure 6-1.)
2
8.
A
djust R657A so that the output offset is 0 V ±1 mV.
To adjust group delay
Preparation
To perform the group delay adjustment, you m ust first remove the top cover of
theTG8000mainframe. (Seepage2-25,Top cover.)
After you have removed the top cover, find the v ariable resistors and capacitors on
theAVG7modulecircuitboard.(SeeFigure6-3.)
6–6 TG8000 Multiformat Test Signal Generator Service Manual

Tektronix TG8000 Specifications

General

Brand	Tektronix
Model	TG8000
Category	Portable Generator
Language	English