Tektronix LTA7P Series, Service Manual

Page: 56 / 172

Performance Verification: Logic Analyzer Module
4- 8
TLA7Nx, TLA7Px, & TLA7Qx Logic Analyzer Module Service Manual
The following procedure checks the basic operation of the probes by verifying
that the probes recognize signal activity at the probe tips.
Equipment required Adjustment/verification fixture version (item 2 )
Prerequisites Warm-up time: 30 minutes
P6417, P6418 or P6434 probe connected
1
Test equipment connected as shown in Figure 4--2
Diagnostics and SELF_CAL pass
1
Do not mix probes; only one type of probe can be functionally verified at a time.
Adjustment/verification
fixture
J2
J1
J26
Fixture supply
C2/C3/CK3
Channel/Group
J3
Clock channel
J5
Figure 4- 2: Probe functional verification test setup
Perform the following steps to complete the probe functional verification:
1. Ensure that the jumper at J15 on the adjustment/verification fixture is in the
INT position to select the internal 50.065 MHz clock. See Figure 4--4 on
page 4--16 for location of J15.
2. Open the Setup window for the LA module.
3.
Click the Set Thresholds button to display the Probe Threshold dialog box.
4. Adjust the threshold level to 700 mV for all channels.
5. Connect the acquisition probe to be tested to the C3/C2 channel group on the
LA module.
6.
Refer to Figure 4--2 and connect the probe to J1 and J2 on the adjustment/
verification fixture. Ensure that you connect the ground side of the podlets to
the ground side of the adjustment/verification fixture connectors.
Logic Analyzer Probe
Functional Verification
Procedure