Tektronix LTA7P Series, Service Manual

Page: 107 / 172

Adjustment/Verification Fixture Adjustment
TLA7Nx, TLA7Px, & TLA7Qx Logic Analyzer Module Service Manual
5- 21
9. Connect the CH1 probe to J2 and center the rising edge on the center
horizontal graticule. Trigger on the CH2 probe connected to J1.
10. Connect the CH1 probe to J4 (SU/HOLD CLK OUT) and verify for a 0
skew (
±
25 ps).
The following procedure is used to adjust the setup time.
Parameter tested Setup Time Adjustment
Equipment
Required Adjustment/verification fixture and power supply (item 2)
Oscilloscope (item 3)
Two 1 M
Ω
10X oscilloscope probe (item 4)
Shorting jumpers (item 14)
Prerequisites Warm-up time: 30 minutes for adjustment/verification fixture and test
equipment
1. Install the following jumpers:
Jumper Jumper name Jumper setting
J13 P6434 Deskew/probe setup 1-3 and 5-6 connected
J15 Clock selection INT
J16 Deskew 1-2 and 4-5 connected
J17 Setup/hold select SETUP
J19 Clock polarity select Removed
1. Set up the oscilloscope by pressing Setup, and then press Factory Setup, and
then press OK Confirm Factory Init to return the oscilloscope to default
conditions.
2.
Set up the oscilloscope as listed below.
a.
Set up the CH1 Vertical menu as follows:
H
Coupling DC/50
Ω
H
Fine Scale 200 mV/div
H
Position --3.32 div
b. Set up the Horizontal menu as follows:
H
Time Base Main
Setup Time Adjustment