User's Manual

USER
MANUAL
MPD-1611291-A
EXACT-V2 High End Rack Modulator / Exciter
3/10/2017
MPD-1611291-A
Page 34/94
2) Working with external 1PPS reference signal:
Figure 15: VX20-x0x2 clock synchronization – external 1PPS signal
In this case, the modulator directly uses the 1PPS available from the external source
available on the 1PPS I/O interface. This 1PPS reference signal is used for both temporal
synchronization and 10 MHz PLL locking.
3) Working with external 10 MHz and external 1PPS reference:
Figure 16: VX20-x0x2 clock synchronization – external 10 MHz and 1PPS signal
In this case, the modulator uses the external 10 MHz signal as well as the external
1PPS signal available on the 10 MHz In and 1PPS I/O interfaces, respectively.
A 10 MHz reference signal is always available on the 10 MHz Out interface.