R&S AFQ100A
Baseband Block
1401.3084.32 4.36
E-3
Setting Up Several Connected R&S AFQs for Precise Simultaneous
Signal Output
A simultaneous signal output of several R&S AFQs requires the synchronization of the connected
instruments. Very precise simultaneous signal output beyond the normal trigger resolution of 3.3 ns can
be reached by connecting and configuring the instruments as described below. A delay between trigger
and signal output of only approx. 30 ps can be reached.
Note:
The very precise synchronization of several connected R&S AFQ I/Q Modulation Generators
requires the
Baseboard Revision 8
or higher. Up to baseboard
Revision 5
only synchronization
mode
Normal
is provided (stand-alone mode).
A simultaneous signal output of several R&S AFQs is only available for analog signal output.
One instrument is used as the master to control the other slave instrument(s). The figure below
illustrates the correct cabling of the instruments.
The following has to be observed:
The instruments have to be wired as a daisy chain. BNC T-adapters are used to this end.
A bus terminator is needed on the last instrument in the chain. This instrument must be setup as
Last
slave. The required terminator resistance is automatically applied to the inputs
TRIG IN
and
REF IN
.
The output
REF OUT
of the Master-AFQ has to be connected to the signal inputs
REF IN
of all
Slave-AFQs.
The output
MARKER 1
of the Master-AFQ has to be connected to the signal inputs
TRIG
of all
Slave-AFQs.
The
connecting cables
from the master instrument to the slave instrument must be of
same
length
and
type
, concerning both, the REF-OUT to REF-IN connection and the MARKER1 to TRIG
connection.
