Keysight 34972A - Totalizer

Tutorial 7
Keysight 34970A/34972A User’s Guide 333
Totalizer
The 34907A module has a 26-bit totalizer which can count pulses at a 100 kHz
rate. You can manually read the totalizer count or you can configure a scan to
read the count.
– You can configure the totalizer to count on the rising edge or falling edge of
the input signal.
– Using the hardware jumper labeled “Totalize Threshold” on the module, you
can control the threshold at which an edge is detected. Move the jumper to the
“AC” position to detect changes through 0 volts. Move the jumper to the “TTL”
position (factory setting) to detect changes through TTL threshold levels.
– The maximum count is 67,108,863 (2
26
-1). The count rolls over to “0” after
reaching the maximum allowed value.
Signal
Conditioning
Threshold Jumper
+
_
G
GND
Totalizer
On/Off
TTL
AC
Counter
Software
Reset
Data
Gate
Input
Gate
Input
Input Signal
(1V to 42V)
0 V Threshold (AC)
2.5 V Threshold (TTL)