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Display the input signal's minimum response only
(unlimited or for a certain amount of time)
Capture the selected trace and compare traces
Load a saved trace
Hide the selected trace
Remove all the traces and initialize the trace
settings
NOTE
For the Max Hold and Min Hold, your instrument compares newly acquired data with the
active trace and displays larger maximum values or smaller minimum values on the
screen. You can set it to Unlimited to hold and view maximum or minimum data or
specify a certain amount of time up to 60 seconds by using numeric keys or the rotary
knob.
4.
To select the detection option, press the More (1/2) > Detectors, and then do one of the
following:
To display
Random noise better than the peak without missing signals
The highest value in each data point
The root mean squared average power across the spectrum
The lowest value in each data point
The center value in each data point
5.
Optional. Press the More (1/2) > Trace Info soft key, and then select the trace number to view
the trace's parameter setting information stored at the time of the measurement or None to hide
the information display.
6.
Optional. If you have the two traces T1 and T2, you can perform trace math. To view the power
difference between the traces, press the T1 – T2 -> T5 or T2 – T1 -> T6 soft key.
The result is overlaid on the screen along with the second Y-axis.
NOTE
To be able to load a trace, the trace to be overlaid must be saved in the same
measurement mode and frequency setting as the current measurement.
Sound indicator
You can use the Sound Indicator to help you identify interfering signals by sounding an alarm.
Procedure
Configure test parameters as described in the "Configuring test parameters" on page 95.
1.
2.
Press the MEASURE SETUP hot key.
3.
Press the Sound Indicator soft key.
4.
Toggle the Sound soft key between On and Off to enable and disable the alarm sound.
5.
Select the alarm reference option from the following choices:
–
To set the active marker position as the alarm reference, toggle the Alarm Reference soft
key and select Marker.
Min Hold
Capture
More (1/2) > Load
Trace View > Off
More (1/2) > Trace
Clear All
Using Interference Analyzer
JD780A Series Analyzers
m
C
L
F
Select
Normal
Peak
RMS
Negative Peak
Sample
103
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