User's Manual

Exalt Installation and Management Guide
EX-i Series (TDD) Digital Microwave Radios
14 206501-019
2016-05-24
same site. Figure 7 illustrates using a GPS source for the primary synchronization at a typical site with
collated radios.
Figure 7 GPS as primary sync source using AUTO SYNC
Figure 8 illustrates two separate radio locations benefiting from synchronized GPS sources.
Figure 8 Synchronized GPS sources using AUTO SYNC
Offset Timing
Manual control of offset timing is also allowed. This provides a means to delay the synchronization
signal using a user-defined offset. This is helpful when Exalt radios are near other devices operating in
the same frequency band that also use a timing source, such as GPS. The timing source to the Exalt
radios can be adjusted to match the other radio system timing source mechanism.
Offset timing can also optimize timing intervals for repeaters and backbones. As the distance of each
link results in a unique factor for speed-of-light transmission of the radio signal, a subsequent radio can
be delayed in timing so that the overall synchronization of radios is precisely maintained.
Offset timing can be adjusted in 1-ms intervals, from zero to the radio’s frame length setting. For
example, if using a 2-ms frame length, the offset timing can be set from zero up to 1999 ms.
Note: When GPS Sync is enabled, link initiation typically takes 1 to 3 minutes to allow for
the radio to properly synchronize to the available GPS satellites.