Tektronix LTA7P Series, Service Manual

Page: 100 / 172

Adjustment/Verification Fixture Adjustment
5- 14
TLA7Nx, TLA7Px, & TLA7Qx Logic Analyzer Module Service Manual
The following procedure checks the internal clock frequency.
Parameter tested Internal Clock Frequency
Equipment
Required Adjustment/verification fixture and power supply (item 2)
Frequency counter (item 8)
Signal generator (item 16)
Shorting jumpers (item 14)
Prerequisites Warm-up time: 30 minutes for adjustment/verification fixture and test
equipment
1. Set up the frequency counter as follows:
a.
Right input (10 Hz -- 100 MHz)
b. Select Direct Resolution: 10 Hz
c. 1 M input termination
d. X1 Attenuation
2. Move one jumper on J16 to DESKEW (pins 2 and 3). Keep the other jumper
connected to pins 4 and 5.
3.
Using the frequency counter, measure the oscillator frequency at J1. It will
measure 50.0650 MHz
±
0.01% (50.0600 -- 50.0700).
Internal Clock Frequency
Check