User Manual

ManualsBrandsExalt Wireless ManualsElectronics4.9GHz Point to Point Fixed Link Radio

Exalt Communications, Inc.

Exalt i-Series Installation and Management Guide

5000001 29

2007-06-25

common clock system, ensuring that all radios simultaneously transmit and receive, and

thus eliminating near-field interference issues and related radio system coupling.

Note: The synchronization function is not currently available on all

Exalt radio models. A firmware upgrade may be required for models

without sync if sync is desired. Contact your Exalt representative for

details.

Synchronization Modes

Synchronization can be accomplished using either an internal or external source. In

either case, one radio in the network must be defined as the primary sync source (A)

radio.

A Global Positioning System (GPS) kit from Exalt is required to implement external

source synchronization. GPS synchronization is not available on all radio models.

Contact your Exalt representative for details.

Synchronization implementation only requires one synchronization source for any

interconnected network. The system also implements a redundancy configuration to

maintain a majority of the synchronization functions in case of primary radio failure.

For internal synchronization, the primary radio is designated SYNC SOURCE. This radio

provides the master timing for all interconnected radios. SYNC SOURCE radios and

collocated radios must be configured as Radio A.

Collocated radios must be in SYNC RECIPIENT mode; they receive sync signaling from

the SYNC SOURCE, either directly or daisy-chained with other collocated radios.

Alternatively, the radio(s) can be placed in AUTO SYNC mode. AUTO SYNC

synchronizes the radios to any source provided on the SYNC IN port. However, if an

appropriate synchronization signal is unavailable, the radio becomes the SYNC SOURCE

for all connected radios.

Internal Synchronization

Figure 4 illustrates the basic interconnectivity of a radio system using internal

synchronization. In this scenario, there are two radios collocated at one site.

Figure 4 Basic radio interconnectivity using internal synchronization

In Figure 5, there are three collocated radios. In this configuration it may be desirable to

make one radio a secondary sync source using AUTO SYNC. This provides

SYNC SOURCE

(A)

SYNC RECIPIENT

(A)

SYNC

OUT

SYNC

FAR-END

RADIO

(B)

FAR-END

RADIO

(B)