Setting Up Several Connected R&S Afqs For Precise Simultaneous Signal Output - R&S AFQ100A Operating Manual

R&S AFQ100A
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.
1401.3084.32 4.36
Baseband Block
E-3