AVG7 module adjustment procedures
AVG7 module ad
justment procedures
This section
contains information needed to adjust the AVG7 module.
Adjustment in the AVG7 module are for the output offset and gain, frame timing
and clock ti
ming, group delay, frequency response, and interchannel delay.
Requirements for adjustment
Before doi
ng the adjustment, note the following requirements:
Personnel
This proc edure is only to be performed by trained service technicians.
Warm-up period
The AVG7 module requires a 20 minute warm-up time in a +20 °C to +30 °C
environment before it is adjusted. Adjustments done before the operating
temperature has stabilized may cause errors in performance.
WARNING. To avoid potential shock, which could cause injury or death, use
cauti
on when removing the TG8000 mainframe top cover w ith power connected.
Access
When
adjusting the AVG7 module, remove the top cover of the
TG8000 mainframe. (See page 2-25, Top cover.)
NOTE. If the serial number of your instrument is B010600 and above, replace the
resistor and capacitor numbers in the figures and procedures as follows:
R6xxx → R6xxx_1 (for example, R651A → R651A_1)
R7xxx → R6xxx_2 (for example, R751A → R651A_2)
R8
xxx → R6xxx_3 (for example, R851A → R651A_3
C6xxx → R6xxx_1 (for e xample, C604B → C604B_1)
C7xxx → R6xxx_2 (for e xample, C704B → C604B_2)
C8xxx → R6xxx_3 (for e xample, C804B → C604B_3)
6–2 TG8000 Multiformat Test Signal Generator Service Manual
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