Performance Ve ri fi cation
1. Initial oscill
oscope setup:
a. Terminate the RF input in 50 Ω and make sure that no input signal is
applied.
b. Push the front-panel Default Setup button.
c. Turn channel 1 off.
d. Push the front-panel RF button to turn on the RF channel and display
the bottom-bezel RF menu.
e. Turn on the average trace as follows: Push the bottom-bezel Spectrum
Traces button and set Normal to Off. Push the side-bezel Average button
to set the Average Traces to On.
f. Turn on the average detection as follows: Push the bottom-bezel
Detection Method button. Push the side-bezel button to set the detection
method t
o Manual. Push the side-bezel Average Trace button. Set the
detection method to Average.
g. Set the
reference level to –25.0 dBm as follows: Push the front-panel
Ampl button. Push the side-bezel Ref Level button. Set the Ref Level to
–25.0 dBm.
h. Set the start and stop frequency as follows: Push the front-panel
Freq/Span button. Push the side-bezel Start button. Set the start
frequency to 50 kHz. Push the side-bezel Stop button. Set the stop
frequency to 5 MHz.
2. Check from 50 kHz to 5 MHz (all models):
a. Set Manual Marker (a) at the frequency with the highest noise level
as follows: Push the Markers front-panel button. Push the Manual
Markers side bezel button to turn on the markers. Turn Multipurpose
knob a to move the marker to the frequency at the noise threshold (highest
p
oint of noise), ignoring any spurs. For this span, it should be at 50 kHz
on the far left of the screen. See the following figure.
MDO4000 Series Specifications and Performance Verification 89
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