User manual

3152B User Manual Publication No. 980935 Rev. M
4-30 ArbConnection Astronics Test Systems
Counter/
Timer
The Counter/Timer panel (Figure 4-20)
contains controls that
select the measurement function and adjust
the counter/timer
parameters for measuring external signals. The counter/timer
measures signals that are connected to the TRIG IN input. The
various parameters that control the counter/timer features are
described below.
State
The State Group has controls to enable or disable the counter. And
to reset the counter and arm it for the next measurement cycle.
Note that when the counter function is turned on, all other waveform
generation features of the 3152B are purged.
Measurement Function
The measur
ement function group has control to select the
measurement function for the counter/timer operation. The 3152B
can measure the following function: Frequency, Period, Period
Averaged, Pulse Width, and Totalize. The totalize function has two
options. If Tota
lize Infinite function is selected the input will count
every legal pulse at the counter input, for an indefinite period of
time, and displays
the total number of pulses until the counter has
been reset. If Totalize Gated function is selected, the input will
count every legal pulse at the trigger input for a period of time that
is defined with the Gate Time parameter.
Figure 4-20, Counter/Timer Panel
Display
The Display Group has controls to select the display mode and to
select if the display shows measurement or gate time readings.
In normal mode, the counter is armed to receive signal at the trigger
input. When signal is sensed, the gate to the counter opens for
duration
as programmed with the Gate Time parameter, processes
the resu
lt, displays the reading and continues with the same
process as long as the signal is available at the input.
In hold mode, the counter is armed to receive signal at the trigger