Table of Contents
Advertisement
Page 14
Modei545A
Logic Level Performance Test.
With test equipment connected as shown in Figure 7, proceed as follows:
a.
Set power supply A to +5.0V.
b.
Set power supply B to OV.
c.
Set TTL-CMOS switch to TTL.
d.
Set power supply B to +1.5V. Probe indicator should light dimly.
e.
Increase power supply B voltage until indicator just reaches full brilliance. Probe tip voltage should be
+2.0, +0.4 -0.2V.
f.
Reduce power supply B voltage until indicator is just extinguished. Probe tip voltage should be +0.8V, +0.2V
-0.3V.
NOTE
For use in the TTL mode, the 545A logic Probe can use power supplies up to
+15V, with slightly changed thresholds. See Figure 4.
g.
Set TTL-CMOS switch to CMOS.
h.
Set power supply A to +5.0V.
i.
Set power supply B to +2.5V. Probe indicator should light dimly.
j.
Increase power supply B voltage until probe indicator just reaches full brilliance. Probe tip voltage should be
+3.5V, ±0.5V.
k.
Reduce power supply B voltage until indicator is just extinguished. Probe tip voltage should be +1.5V to
±0.5V.
I.
Disconnect test equipment.
Advertisement
Table of Contents
