Publication No. 980935 Rev. A
3152B User Manual
EADS North America Test and Services
Operation 3-35
•
Pulse
Width
•
Totalize (counts the number of trigger events)
Use one of the following commands to select the measurement
function:
coun:func freq
Selects the frequency measurement function.
The 3152B takes readings continuously and
places them in the output queue, waiting for a
read operation to clear the queue for the next
reading.
coun:func per
Selects the period measurement function.
coun:func aper
Selects the averaged period measurement
function.
coun:func puls
Selects the pulse width measurement
function.
coun:func tot
Selects the totalize function. The counter will
detect and count all trigger events from the
trigger input.
You may adjust the gate time and display mode. If you want to take
continuous counter readings, use the default display mode as
follows:
coun:disp:mod norm
Enables continuous measurements and
read cycles.
coun:disp:mod hold
Stops the measurement cycle and
performs a single measurement when
triggered by a read operation. The next
measurement cycle may be performed
after you clear the counter buffer using the
following command:
coun:res
Resets the counter, clears the output
queue, and arms the counter for its next
measurement event.
Chapter 5 contains programming references that will allow you to
program all of the counter/timer parameters.
Counter/Timer
Limitations
A summary of counter/timer limitations is given below.
1. Measurement
speed
The rate at which the counter performs its measurements depends
upon the display mode setting. The Normal setting simulates the
display of a bench-top instrument, where the user sees the result of
each measurement as it completes. The display time is roughly
300 ms, allowing enough time to check the result after each gate
time cycle. The maximum rate is three measurements per second
when using low-period gate times. The Hold display mode allows
one reading at a time. The reading starts when the input senses a
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