4-8
PERFORMANCE VERIFICATICMM
PROCEDURE
14/15/16/17. Trigger
sensitivity channel
A and B
The trigger
sensitivity depends on the
amplitude and frequency
of
the
trigger
signal. This
test checks the trigger
sensitivity of the ScopeMeter. Also
the
•hSLOPE/>SLOPE furrction
(triggering on negative slope) 1$
tested for both
channels
A and B. Channel
B
is
tested first.
Test equipment:
Tektronix
SG 503 Constant Amplitude Sine Wave
Generator
Test setup:
Procedure/requlrementsfor
channel B trigger
seneftivHy measurement:
A Apply 3 100 MH2 sine wave, with an amplitude of approximately
500 mV peak'to-peak
to
channel B.
Use a 50Q termination.
6 Adjust the
amplitude of the input signal to exactly 4 divisions
on the display.
C Verify that
the signal Is well triggered.
D Apply
8 60 MHz sine wave, with an amplitude of
approximately 1 00 mV peaK-io-peak
to
channel B. Use a 500 termination.
£ Adjust the amplitude of the Input signal
to exactly 1 .5 divisions on the display.
F Verify
that the signal Is well triggered.
G Apply a 10 MHz sine wave.
wHh an amplitude of 300 mV
peak-to-peak to
channel 8. Use
a
500 termination.
H Adjust the amplitude of the Input
signal to exactly 1 .5 divisions, on the display.
I Verify that the signal
is well triggered on the falling edge.
See figure 4.5.
Figure 4.5 S/gnai triggered
on the failing (negative)
edge
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