Table of Contents
Advertisement
Model 545A
NOTE
In the CMOS mode the 545A logic Probe can use power supplies up to +18V.
Thresholds levels are a function of the supply voltage. See Figure 5.
Positive Pulse Performance Test.
With test equipment connected as shown in Figure 8, proceed as follows:
a.
Set power supply A to +5.0V.
b.
Set TTL-CMOS switch to TTL.
c.
Set pulse generator to output a positive-going 5V /10 nsec pulse.
Page 15
d.
Set pulse generator repetition rate to approximately one-pulse-per-second. The probe indicator should
flash once every second.
e.
Gradually increase power supply A voltage to +15.0V while observing probe indicator. There should be no
change in probe indicator response.
f.
Set TTL-CMOS switch to CMOS.
g.
Set power supply A to +5.0V.
h.
Repeat steps c and d.
NOTE
To test CMOS operation over voltage range in specifications vary power supply
A from +3V to +18V and change pulse generator output to track power supply
voltage. Observe that probe indicator flashes on once-per-second.
i.
Disconnect test equipment.
Advertisement
Table of Contents
