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Model 5328A
Applications
4-2
ARM
SWITCH
ON
SWEEP
SWEEP
OUT
GENERATOR
Figure 4-1.
Measuring Linearity
4-11.
To make a PERIOD
or PERIOD AVG measurement, select the desired function, select
appropriate input signal conditioning (see Paragraph 3-71), and apply the signal to the A input of
the standard
or Option
040 universal
module.
For single period
measurements,
the
RESOLUTION
switch scales the time base frequency which determines the resolution of the
measurement. For optimum resolution, select N=1. Other N values may be desireable to prevent
display overflow
or to get rid of unstable digits.
For PERIOD
AVG
measurements,
the
RESOLUTION switch selects the number of periods over which the period average measurement
is made (the time base is 10 MHz for this case). The PERIOD AVG mode gives increased resolution
and accuracy. Trigger error is decreased by N and the resolution is increased by N (resolution =
1 ns or ans for Option 040). The measurement time is equal to the period times N.
4-12.
In PERIOD and PERIOD AVG with the rear panel ARM switch OFF, the measurement cycle
is initiated by the SAMPLE RATE control. With the ARM switch ON, PERIOD and PERIOD AVG
are armed by a trigger event at the B input. To measure the frequency of a tone burst signal, use
arming and the PERIOD AVG (for increased resolution over a low frequency measurement) as
shown in Figure 4-2. Select N equal to or less than the number of periods in the tone burst and
adjust channel B trigger level to trigger on the first cycle of the input signal.
REAR
PANEL ARM SWITCH ON
va
B TRIGGER
LIGHT
INDICATES WHEN
B TRIGGER
EVENT
ARMS
MEASUREMENT
Figure 4-2.
Tone Burst Measurement
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