USER
MANUAL
MPD-1611291-A
EXACT-V2 High End Rack Modulator / Exciter
3/10/2017
MPD-1611291-A
Page 33/94
The figure below shows the entire VX20-x0x2 synchronization processing block (the
on-board GPS being depicted as “GPS receiver”):
Figure 13: VX20-x0x2 synchronization processing block
Then, depending on the user’s setup, three cases can be considered:
1) Working with external GPS signal reference (using on-board GPS receiver):
Figure 14: VX20-x0x2 clock synchronization - GPS signal
In this case, the modulator processes the 1PPS due to the on-board GPS receiver. The
GPS reference signal is available on GPS In interface. This 1PPS reference signal is used
both for temporal synchronization and 10 MHz PLL locking. The 1 PPS I/O can be
configured as an output to provide a 1PPS signal to other equipment.
