Performance Ver
ification
Check Residual Spurio us Response
This check verifies that the oscilloscope meets the specification for residual spurious response. This check does not
require an input signal.
1. Initial Setup:
a. Terminate the oscilloscope RF input in 50 with no input signal applied.
b. Push Default Setup.
c. Turn on RF.
d. Turn on Average Trace. Push the bottom-bezel S pectrum Traces button and set Normal to Off. Push the
side-bezel Average button to set Average Traces to On.
e. Set Ref Level to –15 dBm. Push the front-panel Ampl button. Push the side-bezel Ref Level button. Set the
Ref Level to –15 dB.
2. Check in the range of 9 kHz to 50 kHz (all models).
a. Set Start Frequency to 9 kHz. Push the front-panel Freq/Span button. Push the side-bezel Start button. Set the
start frequency to 9 kHz.
b. Set Stop Frequency to 50 kHz. Push the side-bezel Stop button. S et the stop frequency to 50 kHz.
c. Observe any spurs above –78 dBm and note them in the test record.
3. Check in the range of 50 kHz to 5 MHz (all models).
a. Set Stop Frequency to5MHz.
b. Set Start Frequency to 50 kHz.
c. Observe any spurs above –78 dBm and note them in the test record.
4. Check in the range of 5 MHz to Maximum Bandwidth (MDO3SA not installed):
a. Set Stop Frequen cy to the maximum bandwidth.
b. Set Start Frequency to 5 MHz.
c. Set RBW to 100 kHz. Push the BW front-panel button. Turn the Mu ltipurpose a knob counter-clockwise to change
the RBW to 100 kHz.
d. Observe any spurs above –78 dBm and note them in the test record.
5. Check in the range of 5 MHz to 2 GHz (MDO3S A installed):
a. Set Stop Frequency
to2GHz.
b. Set Start Frequency to 5 MHz.
c. Set RBW to 100 kHz. Push the BW front-panel button. Turn the Mu ltipurpose a knob counter-clockwise to change
the RBW to 100 kHz.
d. Check the spur level at 1.25 GHz, if present. Push the Markers front-panel button and then push the Manual
Markers side-bezel button to turn on manual markers. Turn the Multipurpose a knob to line up Marker a on the
MDO3000 Series S pecifications and Performance Verification 95
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