R&S 1129.7246.03, Operating Manual

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Operating Manual 1302.6163.12 - 03 4.113
R&S ESU Instrument Functions
Analyzer Mode
For filter type CHANNEL or RRC, the bandwidth is selected from the list of available
channel filters given in section
“Filter Types” on page 4.117 .
For data entry, the cursor keys
U u
and
U d
scroll through this list.
The manual input mode of the resolution bandwidth is indicated by a green asterisk
(*) on the display.
Remote command:
BAND:AUTO OFF;
BAND 1MHz
VIDEO BW
MANUAL The VIDEO BW MANUAL softkey activates the manual data entry for the video
bandwidth.
The video bandwidth can be selected in 1/2/3/5/10 steps in the range between 1 Hz
and 10 MHz.
For numeric inputs, the values are always rounded to the nearest possible allowed
bandwidth. For rotary knob or UP/DOWN key inputs, the bandwidth is adjusted in
steps either downwards or upwards.
The manual input mode of the video bandwidth is indicated by a green asterisk (*)
on the display.
Remote command:
BAND:VID:AUTO OFF;
BAND:VID 10 kHz
SWEEPTIME
MANUAL The SWEEPTIME MANUAL softkey activates the manual data entry for the sweep
time. At the same time, the coupling of the sweep time is cancelled. Other couplings
(
VIDEO BW, RES BW ) remain effective.
In the frequency domain (span > 0 Hz) and for resolution bandwidths above 1 kHz,
the allowed sweep times for spans > 3.2 kHz range from 2.5 ms through to 16000 s.
With spans below 3.2 kHz, the maximum allowed sweep time is reduced to 5 s *
span/Hz.
If FFT filters are used, the sweep time is fixed by the span and the bandwidth and
therefore cannot be set.
In time domain (span = 0 Hz), the range of sweep times is 1 µs to 16000 s is select-
able in steps of max. 5% of the sweep time. For numeric inputs, rounding is made to
the nearest possible sweep time. For rotary knob or UP/DOWN key inputs, the
sweep time is adjusted in steps either downwards or upwards.
The manual input mode of the sweep time is indicated by a green asterisk (*) on the
display. If the selected sweep time is too short for the selected bandwidth and span,
level measurement errors will occur. This happens because the available settling
time for the resolution or video filters is too short. In this case, the R&S ESU outputs
UNCAL on the display and marks the indicated sweep time with a red asterisk (*).
Remote command:
SWE:TIME:AUTO OFF;
SWE:TIME 10s