Tektronix TG8000 Service Manual

AGL7 module adjustment procedures
2. Set the horizon
tal fine timing for BLACK 1 through BLACK 3 to 0.00 ns as
follows:
a. Press the up (▲
) or down (▼)arrowbuttontoselectGENLOCK and
then press the ENTER button.
b. Press the le
ft (◄)orright(►) arrow button to select INTERNAL,and
then press the ENTER button.
c. Press the BA
CK button to return the AGL7 main menu.
d. Press the up (▲) or down (▼) arrow button to select SELECT OUTPUT.
e. Press the left (◄) or right (►) arrow button to select BLACK 1,andthen
press the ENTER button.
f. Press the up (▲)ordown(▼) arrow button to s elect TIMING,andthen
press the ENTER button.
g. Press the up (▲)ordown(▼) arrow button to select Horizontal Fine,
andthenpresstheleft(◄)orright(►) arrow button to set the timing to
0.00 ns
.
h. Press the BACK button twice to return the AGL7 main menu.
i. Repeat parts e through h of this step to set the horizontal fine timing for
BLACK2andBLACK3to0.00ns.
3. Attach the two P6139A probes to the oscilloscope CH1 and CH2 i nputs.
4. Locate test points TP410, TP420, TP430, TP501, T P502, and TP504 on the
AGL7 circuit board. (See Figure 4-3.)
5. Locate variable resistors R470, R471, R472, R473, R474, and R475 on the
AGL7 circuit board. (See Figure 4-3.)
6. Turn all the variable resistors completely counterc l ockwise.
7. Connect the probe tip from the oscilloscope CH1 input to TP501.
8. Connect the probe tip from the oscilloscope CH2 input to TP430.
9. Set the oscilloscope settings as indicated below:
Vertical
500 mV/div
Ve rtical position –3.0 div
Horizontal
2ns/div
Trigger source
CH1
Trigger level 1.5 V
Trigger slope Rising Edge
TG8000 Multiformat Test Signal Generator Service Manual 4–9

Tektronix TG8000 Specifications

General

Brand	Tektronix
Model	TG8000
Category	Portable Generator
Language	English