Tektronix LTA7P Series, Service Manual

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Performance Verification: Ajustment/Verification Fixture
4- 36
TLA7Nx, TLA7Px, & TLA7Qx Logic Analyzer Module Service Manual
9. Set one of the vertical cursors before the leading edge of the CH 2 pulse, and
the other cursor after the leading edge of the CH 1 pulse.
10. Connect the CH1 probe to R127. Verify the CH1-CH2 delay is averaged
around 3.0 ns
±
100 ps.
11. The CH1-CH2 delay represents the setup time at R127. Record the setup
time at R127 on the Calibration Data Report.
12. Connect the CH1 probe to R321. Verify the CH1-CH2 delay is averaged
around 3.0 ns
±
100 ps.
13. The CH1-CH2 delay represents the setup time at R321. Record the setup
time at R321 on the Calibration Data Report.
Use the following procedure to verify the external clock input.
Parameter tested External Clock Input
Equipment
required 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 the jumper positions as listed in the table.
Jumper Jumper name Jumper setting
J13 P6434 Deskew/probe setup 1-3 and 5-6 connected
J15 Clock selection EXT
J16 Deskew 1-2 and 4-5 connected
J17 Setup/hold select SETUP
J19 Clock polarity select Disconnected
2. Using the signal generator, insert a 225 MHz, 1 V
p-p
signal at J18 EXT CLK
IN.
3. Using the frequency counter, verify that the data is being output at a
112.5 MHz clocked rate at J1 and J2.
Verify External Clock Input