Tektronix LTA7P Series, Service Manual

Page: 76 / 172

Performance Verification: Ajustment/Verification Fixture
4- 28
TLA7Nx, TLA7Px, & TLA7Qx Logic Analyzer Module Service Manual
J20
J6 J7
J1
J2
J3
J16
J13
J4
J17
J19
J18
J15
J26
GND
GND
Setup/Hold
Clock out
Clock
Clock
J16
DESKEW
INT EXT
J15
Ext/Int
Clock select
J19
Jumper installed:
clocked on falling edge
Jumper removed:
clocked on rising edge
SETUP HOLD
J17
Setup/Hold
select
External
Clock in
J5
J14
1 2 3 4 5
J13
P6434
Deskew/Probe setup
J4
PROBE
SETUP
DESKEW
R127
R39
R67
R321
R85
R38 (V
DD
adjust )
J8 (V
EE
)
J9 ( GND )
J10 (V
DD
)
Threshold
in
J22
DC in
Denotes ground
side of resistor
1
6
Figure 4- 11: Adjustment/verification fixture detail
Table 4- 6: Adjustment/verification fixture jumper settings
Jumper Jumper name Jumper function
J13 P6434 Deskew/probe
setup Determines whether checking setup/hold or deskew for the
P6434 probe (J5)
J15 Clock selection Determines whether the internal clock (50.065 MHz) or the
external clock (J18, BNC) will drive the circuitry
J16 Deskew Selects between minimum or nominal pulse width
J17 Setup/hold select Determines whether checking setup time or hold time
J19 Clock polarity select Selects polarity of the clock for setup and hold testing