R&S ESCI Configuration/Setup
1166.6004.12 4.207 E-3
SETUP menu:
PRESELECT
ON OFF
The PRESELECT ON/OFF softkey switches the preselection on or off.
The softkey is available only in the analyzer mode.
IEC/IEEE bus command INP:PRES ON
Preselection causes additional dependencies which are automatically taken into account in the coupled
setting.
• With the preselection active, the FFT bandwidths are not available.
• With the preselection active, the start frequency is set to 150 kHz in the FULL SPAN setting to avoid
permanent switching of the relay at the band limit of 150 kHz.
• Due to the limited tuning speed of the tracking passband filters, the maximum sweep rate (3 GHz / 5
ms) can no longer be attained with the preselection switched on. The minimum settable sweep time is
obtained from the sum of the minimum possible sweep times in the associated filter bands.
Filter band Min. sweep time for filter band
9 kHz to 150 kHz -
150 kHz to 2 MHz -
2 to 8 MHz 500 ms
8 to 30 MHz 50 ms
30 to 70 MHz 50 ms
70 to 150 MHz 50 ms
150 to 300 MHz 50 ms
300 to 600 MHz 50 ms
600 to 1000 MHz 50 ms
1000 to 2000 MHz 50 ms
2000 to 3000 MHz -
Preamplification
Switching on the preamplifier diminishes the total noise figure of the R&S ESCI, thus increasing the
sensitivity. The preamplifier follows the preselection filters so that the risk of overdriving by strong out-of-
band signals is reduced to a minimum. The signal level of the subsequent mixer is 20 dB higher so that
the maximum input level is reduced by the gain of the preamplifier. The total noise figure of R&S ESCI is
reduced from approx. 18 dB to approx. 11 dB with the preamplifier switched on. The use of the
preamplifier is recommended when measurements with a maximum sensitivity are to be performed. If
the measurement should be performed at maximum dynamic range, the preamplifier should be switched
off.
The gain of the preamplifier is automatically considered in the level display. In Analyzer mode, on
switching on the preamplifier the RF attenuation or the reference level is adapted depending on the
settings of the R&S ESCI.
SETUP menu:
PREAMP
ON OFF
The PREAMP ON/OFF softkey switches the preamplifier on or off.
The softkey is available only in the analyzer mode when the measurement
with preselection is activated.
IEC/IEEE bus command :INP>:GAIN:STAT OFF
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