User Manual 2461 Type C
B-5
INPUT1:ATTEN
Attempt to change attenuation state
INPUT1:ROUT SEP
Attempt to change to separate inputs
In addition to the above common settings, the default settings when the Fall Time function
is selected are:
Command
Measurement Function
CONF1:TINT
Time Interval 1-2
INPUT1:COMP:SLOPE NEG
Negative Slope, INPUT 1
INPUT2:COMP:SLOPE NEG
Negative Slope, INPUT 2
The following commands, when sent to the 2461 Type C while Fall Time is enabled, will
generate errors:
Command
Measurement Function
INPUT1:COMP:SLOPE POS
Attempt to change slope on INPUT 1
INPUT2:COMP:SLOPE POS
Attempt to change slope on INPUT 2
INPUT1:COMP:SETUP:AUTO OFF/ONCE Attempt to change Auto trigger state on
INPUT1
INPUT1/2:COMP:LEVEL
Attempt to set a trigger level on INPUT 1 & 2
INPUT1:ATTEN
Attempt to change attenuator state
INPUT1:ROUT SEP
Attempt to change to separate inputs
Phase Measurement
Phase measurement on the UCT is a sequence of functions, and is accomplished by
measuring the time interval between the two signals and calculating the phase as a
function of the total Period. This complex measurement is implemented as a series of
three measurements:
(
1)
A Ratio 1/2 or (2/1) to determine if the signals are the same frequency.
(2)
A Period measurement to determine the period of the reference signal.
(3)
A Time Interval measurement to determine the time difference between the two
signals.
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