Racal Instruments 2461 User Manual page 40

2461Type C User Manual
Racal Instruments  1998
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Measures the minimum (minus peak) voltage of the
waveform at Input 1.
Volts minimum Input 2
Measures the minimum (minus peak) voltage of the
waveform at Input 2.
MATH FACILITY
The Math Facility offers the following algorithm:
Reading=Result-Offset
Scale
Where: Offset=0 and Scale=1 by default
AVERAGING
This facility returns the average of 100 measurements for the
following functions:
Frequency Input 1
Frequency Input 2
Frequency Input 3
Period Input 1
Period Input 2
Ratio Input 1/Input 2
Ratio Input 3/Input 2
Time Interval Input 1 to Input 2
Time Interval Input 2 to Input 1
AUTOMATIC/MANUAL TRIGGERING
The trigger level can be set automatically or manually.
Automatic
In automatic mode, the system measures the positive and
negative peaks of the signal and sets the trigger voltage to
the mid-point.
Certain restrictions regarding minimum amplitude and
frequency apply in this mode. A choice of minimum
frequency limit is available. However, the system is able to
work with DC voltages (i.e. voltages with no or very small
AC content. For such DC inputs, the trigger level and the
displayed peak voltages will be set to the perceived
average value of the input (i.e. the perceived DC level).
During auto-triggering, the system will automatically select
Theory of Operation 3-13