Racal Instruments 2461 User Manual page 38

2461Type C User Manual
Racal Instruments  1998
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Totalize Input 2 by Input 1
Displays the sum total of events occurring at Input 2 during
the interval between START and STOP events at Input 1.
The action is as follows:
INPUT 1 Slope
POSITIVE
NEGATIVE
It is possible to delay the arming of the STOP circuit; this
feature may prevent premature triggering of the STOP
circuit due to external noise (e.g. contact bounce from a
switch generating the START event).
Manual Totalize Input 1
Displays the sum total of events occurring at Input I
between START and STOP events provided either by
means of SCPI commands or a button on the soft front
panel of the VXIplug&play install disk (Racal Instruments
part number 60-0087).
The summation of events is cumulative over successive
periods until the count is cleared by means of either a SCPI
command or a button on the soft front panel of the
VXIplug&play install disk.
Manual Totalize Input 2
Displays the sum total of events occurring at Input 2
between START and STOP events provided either by
means of SCPI commands or a button on the soft front
panel of the VXIplug&play install disk (Racal Instruments
part number 60-0087).
The summation of events is cumulative over successive
periods until the count is cleared by means of either a SCPI
command or a button on the soft front panel of the
VXIplug&play install disk.
Ratio Input 1/Input 2
Measures the ratio of the frequencies applied to Input 1 and
2.
Ratio Input 3/Input 2
Measures the ratio of the frequencies applied to Input 3 and
2.
Check
Checks the counting circuits for basic functionality.
Counting circuits that are working correctly will return a
START STOP
↑ ↑
↓ ↓
Theory of Operation 3-11