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Description
Detector
Scale Type
Scale/Division
Marker 1
Key Access:
AC
DC
To prevent damage to the input circuitry of the analyzer, please ensure
CAUTION
that dc and transient signals are suppressed before selecting dc coupled
mode. Select ac mode if you are unsure of the nature of the input signal.
Sets CISPR BAND B start frequency to 150 kHz and the stop to
150 kHz - 30 MHz
30 MHz. The reference level is set to 75 dBuV in log scaling and the
units to dBuV. The resolution bandwidth is set to 9 kHz (Man Couple),
the marker is turned on as the active function, and the following
settings are set to Auto: video bandwidth, video bandwidth ratio, sweep
time, attenuation, and center frequency step size. Start Frequency is
made the frequency default.
Chapter 2
Setup
Peak
Log
10 dB/Div
Normal, active
Meas Setup
Sets the input coupling to ac coupling. Measurements
below 100 kHz (10 MHz for E7405A) will have
significant amplitude errors in the ac coupled mode.
You should use the dc coupled mode to avoid this rolloff
effect.
Key Access:
Meas Setup
Sets the input coupling to dc coupling. This allows you
to make measurements at low frequencies with
increased accuracy.
Once dc coupling has been selected, the analyzer
remains in the dc coupled mode until you do one of the
following:
1. Press
Preselect
2. Press
Input/output
3. Press
Meas Setup
keys that automatically set the coupling mode to ac
or manually set the coupling to ac under one of the
band keys that allow ac and dc coupling.
4. Execute a SCPI remote commands that is the
equivalent to one of the items 1 through 3.
Key Access:
Meas Setup
Front-Panel Key Reference
,
9 - 150 kHz
.
,
(AC).
Coupling
and then select one of the band
,
9 - 150 kHz
Meas Setup
123
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