Figure 3.3 Typical 12.8Mhz Clock Wave Form - Tait TB8100 Service Manual

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