HP 5328A - 4-37. Ratio Measurements; 4-39. Ratio Functions (B;A and C;A)

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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