Isn't Simulcasting complicated and tricky? What are the issues?

Positioning the coverage overlap areas: Where possible sites are selected and antenna types are used to position the coverage overlap area where there is less radio population. If possible, advantage is taken of coverage area geography (mountains!) to minimise coverage overlap.

It is difficult to manage the size of coverage overlap but where possible maximum use of signal strength is taken to reduce the depth of nulls in overlap areas.

Dealing with overlap from multiple sites: Care is taken where possible to avoid overlap from multiple sites and where this is unavoidable, an experienced commissioning engineer can minimise the effects of multiple overlap.

What Frequency references can be used?

Any reference that provides 10 or 12.8 MHz is OK. We recommend stability in the order of 0.005ppm ageing per year. References that are externally corrected can also be used.

Is the GPS unit used at the remote site OK to use as a reference?

The remote site GPS unit is not used to provide a frequency reference. It is used to provide a one pulse per second (1pps) output used to synchronise CTCSS. GPS frequency references certainly can be used but the standard unit offered with the remote site equipment is a simple inexpensive unit intended for CTCSS. GPS frequency references are more sophisticated, specialised and costly.

Why are there no AIM's ARM's anymore?

Audio Inversion and Recovery Modules were provided with the original T805 Series 1 equipment purely to deal with CTCSS, to invert and then recover the audio band for linking to remote sites so that CTCSS could be passed on the limited link audio band. They are no longer required.

How does it deal with CTCSS?

The remote site GPS unit provides a a pulse per second (1pps) output used to synchronise CTCSS. With all sites synchronised to GPS 1pps, CTCSS is guaranteed to be transmitted in phase from all sites.

How many sites or channels can be used?

31 sites can be supported per channel. There is no limit to the number of channels. Support for more than 31 sites can be added if required.

How long does training take?

Approximately 10 seconds for a 2 site system.

What about a GUI instead of a VT100 terminal?

This is being considered but will not be provided at launch. The VT100 terminal does provide OS independence and as an engineering tool offers the same industry standard type functionality commissioning engineers are used to with, for example, Routers.

What sort of voters can be used?

Sinad Voters are supported as standard although RSSI voting has been and can be used, with some customisation.

How many monitor receivers do I need?

Each system transmitter must be able to be received by a monitor receiver. If one monitor receiver is in the coverage area of all system transmitters then only one is required (best case), or if for some reason monitor receivers cannot be placed where they can receive more than one transmitter, one is required per transmitter (worst case).

For multi-channel systems, the central site can remotely control monitor receiver frequency, in order to train for all system channels with one set of monitor receivers.

Can I have receive only sites?

Yes, the system directly supports receive only sites.

What is the audio latency through the system?

Dependant on link delays, about 140msec.

Will it work with TB8000/T800 and other manufacturers' product?

Yes although the performance and interface capabilities of non-Tait products would be evaluated on a case-by-case basis.

Will it work with the old T805 Tait Quasi-Sync System?

No, this is not supported.