Tait TB8100 Service Manual

80 Reciter Fault Finding TB8100 Service Manual
© Tait Electronics Limited September 2006
Task 4 —
Check 12.8MHz
Clock
Refer to Figure 3.3 and Figure 3.4 on page 81. The circled number in the
following instructions refers to Figure 3.4.
1. Disconnect the power from the reciter, and remove the RF side cover.
2. Power up the reciter.
3. Using an oscilloscope, check the 12.8MHz clock signal at the test
point
b on the RF board.
4. Check for a clean wave form with the following specifications:
frequency 12.8MHz
voltage 1.2 V
pp
(approximately)
duty cycle 50% (approximately)
If the wave form meets these specifications, return to Task 2
. If it
does not, return the complete reciter to your nearest CSO for repair
or replacement.
Figure 3.3 Typical 12.8MHz clock wave form

Tait TB8100 Specifications

General

Brand	Tait
Model	TB8100
Category	Accessories
Language	English