R&S ESU Instrument Functions
Receiver Mode
4.60 Operating Manual 1302.6163.12 - 03
Preamp - Switching the preamplifier on and off
The preamplifier can be switched on/off separately for each subrange.
Remote command: SCAN1:INP:GAIN:STAT OFF
Auto Preamp - Activates the auto preamp function
Remote command: SCAN1:INP:GAIN:AUTO OFF
RF Input - Selects the RF Input
INPUT 1- Input 1 covers the whole frequency range.
INPUT 2 - Input 2 is pulse resistant and is limited to 1 GHz
Remote command: SCAN1:INP:TYP INPUT1
LN Preamp - Activates Low Noise Preamplifier
Activates or deactivates the low noise preamplifer if option R&S ESU-B24 is
installed.
The low noise preamplifier provides the maximum sensitivity of the R&S ESU. Since
the low noise preamplifier is in front of the preselection filters the risk of intermodula-
tion is increased. This preamplifier covers the range from 100 kHz to the upper limit
frequency. Activating the low noise preamplifier deactivates the standard preampli-
fier.
As of firmware version 4.43 ist is possible to activate the low noise preamplifier in
combination with an active preselector.
Default value is OFF.
Remote command: INP:GAIN:LNA:STAT ON | OFF
ADJUST
AXIS
The ADJUST AXIS softkey automatically sets the limits of the diagram so that the
lower limit frequency corresponds to the start frequency of range 1 and the upper
limit frequency to the stop frequency of the last range.
Remote command: --
INS BEFORE
RANGE
The INS BEFORE RANGE softkey shifts the active scan range in the table to the left
by one column. A new column with identical settings is created. The limit frequen-
cies can be changed accordingly.
Remote command: --
INS AFTER
RANGE
The INS AFTER RANGE softkey shifts the active scan range in the table to the right
by one column. A new column with identical settings is created. The limit frequen-
cies can be changed accordingly.
Remote command: --
ON The preamplifier is considered in autoranging. It is only cut in after the
attenuation has been reduced to the minimum settable value.
OFF Auto ranging without preamplification.
To Next Page
Loading...
