Using The Gate & External Arm Menu Key; Overview Of Gate/External Arming Functions; Gate/External Arming Capabilities; Auto Arming - HP 53131A Operating Manual

Chapter 2 Operating Your Universal Counter
Using the Gate & External Arm Menu Key
Using the Gate & External Arm Menu Key

Overview of Gate/External Arming Functions

Table 2-2 for the HP 53131A (and HP 53132A with a serial number prefix
MEASURE
below 3646) and Table 2-3 for the HP 53132A with a serial number prefix
Freq & Time &
Period 3646 and above (on page 2-19 and page 2-23, respectively) list the menus
Ratio
for all the arming configurations, and shows how the Gate and External
Other Gate &
Meas ExtArm
Arming menu changes as a function of the measurement and the arming
mode.
The HP 53131A/132A Counter has four arming modes: auto, external,
digits, and time. However, the HP 53131A (or HP 53132A with a serial
number prefix below 3646) and HP 53132A have different arming
capabilities for Time Interval measurements. Thus, for simplicity, their
Time Interval arming capabilities are discussed in separate subsections.
• If you are using an HP 53131A (or HP 53132A with a serial number
prefix below 3646), read the Time Interval Delay arming information
starting on page 2-17.
• If you are using an HP 53132A (with a serial number prefix 3646 and
above), read the Time Interval Delay arming information starting
on page 2-20.

Gate/External Arming Capabilities

AUTO Arming

For frequency, period, frequency ratio, risetime, falltime, pulse width,
dutycycle, and phase, auto arming means make individual
measurements as fast as possible.
For totalize, auto arming means the Counter starts to count when it is
enabled by the pressing of either the Run or Stop/Single key.
The Counter stops counting when the Stop/Single key is pressed.
2-16 Operating Guide