Operating Manual EMI TEST RECEIVER ESIB7 - Rohde & Schwarz

ESIB
Analyzer - Level Display/RF Input
RF Input Configuration – INPUT Key
In addition to manual entry of the input attenuation, the ESIB provides an option which allows the RF
attenuation, dependent on the selected reference level, to be automatically set. Thus, it is guaranteed
that an optimum combination of RF attenuation and IF amplification is always used. For the automatic
selection process, three modes are provided. The AUTO LOW NOISE mode selects the
amplification/attenuation combination so that the display of noise on the ESIB is at a minimum. The
signal/noise ratio is maximised. The AUTO LOW DISTORTION mode is tuned for minimisation of the
internally generated interference products. This causes, however, a lower signal/noise ratio. The ATTEN
AUTO NORMAL mode is a compromise between low noise and low distortion.
When the instruemnt is equipped with option FSE-B21, External Mixer Output, the ESIB26 and ESIB40
can be operated with external mixer.
INPUT menu:
INPUT
INPUT
RF ATTEN
MANUAL
ATTEN AUTO
NORMAL
ATTEN AUTO
LOW NOISE
ATTEN AUTO
LOW DIST
MIXER
LEVEL
INPUT
SELECT
The INPUT key opens the menu for configuring the RF
input. It contains the input attenuator and mixer level for
matching the RF input to the input signal.
The RF ATTEN MANUAL, ATTEN AUTO NORMAL,
ATTEN AUTO LOW NOISE and ATTEN AUTO LOW
softkeys are mutually exclusive selection switches. only
one can be active at any one time.
Softkeys INTERNAL MIXER and EXTERNAL MIXER are
only available when the ESIB is equiped with option FSE-
B21, External Mixer Input (see manual of option).
The INPUT SELECT softkey calls a submenu for
configuration of the RF input
INTERNAL
MIXER
EXTERNAL
MIXER
RF ATTEN
MANUAL
The RF ATTEN MANUAL softkey activates the entry of an attenuation factor
independent of the reference level.
The following attenuation settings are available, irrespective of which input is
active:
• INPUT 1: 0 to 70 dB in 10 dB steps
• INPUT 2: 0 to 70 dB in 5 dB steps
Other inputs will be rounded to the next higher integer value.
If the defined reference level cannot be set for the given RF attenuation, the
reference level will be adjusted accordingly and the warning "Limit reached"
will be output.
IEC/IEEE-bus command :INPut:ATTenuation 40DB
1088.7531.12 4.171 E-15