User's Manual

Exalt Communications, Inc.
Exalt i-Series Installation and Management Guide
5000001 43
2007-04-15
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.
AUTO
SYNC
(A)
FAR-END
RADIO
(B)
SYNC
IN
GPS
ANTENNA
AUTO
SYNC
(A)
FAR-END
RADIO
(B)
SYNC
IN
GPS
ANTENNA
SYNC
RECIPIENT
(A)
SYNC
IN
GPS
ANTENNA
AUTO
SYNC
(A)
SYNC
OUT
SYNC
IN
FAR-END
RADIO
(B)
FAR-END
RADIO
(B)