R&S AFQ100A
Baseband Block
1401.3084.32 4.38
E-3
The synchronization mode has to be set for each instrument. One of the instruments must be appointed
Master and another one must be appointed
Last
slave. The remaining instruments have to be
appointed
Slave
.
Multitriggering
The master receives an external trigger signal (
TRIG)
. The master delays the triggering and sends the
signal to the slaves (
TRIG
) via the
Marker
output. All instruments are in the state "Pre-triggered".
The rising edge of the following Reference Clock pulse acts as trigger for all instruments. All
instruments start signal output simultaneously (see following figure).
Fig. 4-2
Multitriggering of several connected R&S AFQs for precise synchronization
Note:
Variation in temperature may impact timing accuracy.
Keep temperature constant
in running mode to ensure a stable simultaneous signal output.
Time and Frequency Shifts
The user can set time and frequency shifts in the
t
f
/
dialog of the Baseband Block. Time shifts are
implemented using a digital filter whose range and accuracy are ±2 ns and 10 ps, respectively.
Time Shifts
The time shifts are defined in the upper part of the
t
f
/
dialog. If the I and Q delays are 1 ns and
0 ns, respectively, then the I signal will be delayed by 1 ns whereas the Q signal is not changed.