R&S ESCI External Generator Control - Configuration
1166.6004.12 4.300 E-1
EXT SRC
ON OFF
The EXT SRC ON / OFF softkey switches the external generator on or off.
It can only be switched on successfully if the generator has been selected by means of
SELECT GENERATOR and configured correctly by means of FREQUENCY SWEEP.
If one of these conditions is not fulfilled, an error message will be output.
Notes: When switching on the external generator by means of EXT SRC ON, the
R&S ESCI switches off the internal tracking generator and starts programming the
generator settings via the IEC/IEEE-bus interface IEC2.
Programming requires takeover of the IEC/IEEE-bus control at this interface by the
R&S ESCI. To avoid any access conflicts, ensure that no other controller is connected
to the IEC2 interface or the external generator when selecting EXT SRC ON.
The maximum stop frequency is limited to the maximum generator frequency.
This upper limit is automatically reduced by the set frequency offset of the
generator and a set multiplication factor.
With the external generator switched on, the FFT filters (FILTER TYPE FFT in the
menu BW) are not available.
If an error occurs on the IEC/IEEE bus when programming the external generator,
the generator will automatically be switched off and the following error message
will be output:
When the external generator is switched off using EXT SRC OFF, the IEC/IEEE-
bus control is handed over again at the IEC2 interface, i.e. a different controller
will then take over the control of the signal generator.
IEC/IEEE-bus command: SOUR:EXT ON
SELECT
GENERATOR
The SELECT GENERATOR softkey opens a table for selection of the generator
and definition of IECBUS address and control interface.
The table permits configuration of two generators so that switching between two
different configurations is easily possible.
The individual fields contain the following settings:
SRC Index of generator selected
TYPE The field opens the list with the available generators:
After completion of the selection, the remaining fields of the table are
filled with the generator characteristics.
A list of generator types supported by the R&S ESCI is to be found at the
end of section "Softkey SELECT GENERATOR".
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