Model 5328A
Applications
4-37.
RATIO MEASUREMENTS
-
4-38.
In contrast to many counters which relegate ratio measurements to limited capability rear
panel inputs, the 5328A offers full bandwidth, sensitivity, and signal conditioning of the channel
A,
B,
and C input amplifiers.
4-39.
Two ratio functions are available: B/A and C/A (for Option 030 channel
C
installed). The
ratio of the frequency at
B
(or C) to the frequency at A is measured for
N
counts of A where
N
is
selected by the RESOLUTION switch. The resolution of the measurement improves with
increasing
N
and
is
given by
1
part in B/A
x
N
(or C/A
x
N).
Since the rangeofA is0-10MHz while
B
is 0-100 MHz, the lower frequency
is
normally applied to the A input although there
is
no
restriction that this be the case (i.e., ratio's less than 1 may be measured). If B/A
is
greater than
1,
the measurement resolution
is
better than switching the inputs for
a
ratio
4,
provided the value
of
N
remains the same.
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