Tektronix TG8000 Service Manual

AGL7 module adjustment procedures
3. Select the DAC O
ffset (0V DC) calibration signal for BLACK 1 through
BLACK 3 as follows:
a. Press the MODU
LE button to display the AGL7 main menu.
b. Press the up (▲) or down (▼) arrow button to select SELECT OUTPUT.
c. Press the left (◄) or right (►) arrow button to select BLACK 1,andthen
press the ENTER button.
d. Press the left (◄)orright(►) arrow button to select CAL, and then press
the ENTER button.
e. Press the left (◄)orright(►)arrowbuttontoselectDAC Offset (0V
DC), and then press the ENTER button.
f. Press the BACK button twice.
g. Repeat parts c through f of this step to select the calibration signal for
BLACK 2.
h. Press the left (◄) or right (►) arrow button to select BLACK 3,andthen
press the ENTER button.
i. Press the left (◄)orright(►) arrow button to select Black Burst (Same
as BLACK2), and then press the ENTER button.
j. Press the BACK button to return the AGL7 main menu.
4. Locate variable resistor R691 on the AGL7 circuit board. (See Figure 4-1.)
5. Adjust R691 so that the output offset is 0 V ±1 mV.
6. Mov
e the BNC cable connection from the BLACK 1 connector t o the BLACK
2 connector on the AGL7 Genlock module.
7. Lo
cate variable resistor R491 on the AGL7 circuit board. (See Figure 4-1.)
NOTE. You may need to disconnect the cable to Channel 1 in order to adjust R491.
8
.
A
djust R491 so that the output offset is 0 V ±1 mV.
9. Move the BNC cable from the BLACK 2 connector to the BLACK 3
connector on the AGL7 Genlock module.
10. Locate variable resistor R591 on the AGL7 circuit board. (See Figure 4-1.)
11. Adjust R591 so that the output offset is 0 V ±1 mV.
TG8000 Multiformat Test Signal Generator Service Manual 4–5

Tektronix TG8000 Specifications

General

Brand	Tektronix
Model	TG8000
Category	Portable Generator
Language	English