Thorny41587
Member
I have a question. Most of the time EMS comes in on 462.975 loud and clear. But today I can only hear the dispatcher. They are on a repeater... Why is that? HTanks
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462.975?
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Thorny41587
Member
*Update* Now they're back... but what causes this?
KR4BD
Member
Possibly their repeater was "not repeating" ??? You would hear the dispatch, but the mobile units (transmitting on 467.975) were not being repeated on the output frequency of 462.975. On some systems, I have heard mobile units asked the dispatcher to turn off the repeater so they could talk somewhat "privatately". You could still hear the mobiles if you were montoring the input frequency (467.975) and were close enough to the mobile units (but you would not hear dispatch on 467.975.......they would be on 462.975). If I have been too detailed, or technical, I apologize.
If they have multiple repeaters on that freq, It's possable that the mobile was transmitting to a repeater that you can't hear. The Base might transmit on all of the repeater sites at all times.
There was a system nearby that did something like that. I'll add that it's not very likely, but possable.
There was a system nearby that did something like that. I'll add that it's not very likely, but possable.
Hi all,
Having operated this sort of system I can say it's likely not a repeater in the conventional sense, it's a base or remote base. The console operator has the option of repeating the mobile frequency or not, that is he/she controls the transmitter and sends audio via a telco line or radio control channel, usually a microwave link. For this reason the dispatcher isn't heard on the mobile frequency as he/she is on a repeater input. In some cases the operator can control a repeater via a telco line or radio link but usually this is not so.
Having operated this sort of system I can say it's likely not a repeater in the conventional sense, it's a base or remote base. The console operator has the option of repeating the mobile frequency or not, that is he/she controls the transmitter and sends audio via a telco line or radio control channel, usually a microwave link. For this reason the dispatcher isn't heard on the mobile frequency as he/she is on a repeater input. In some cases the operator can control a repeater via a telco line or radio link but usually this is not so.
b7spectra
EMS Dispatcher
WAY back when I worked EMS, dispatch simulcasted on Med 5 & 9, so if I was talking to them on 5, whoever was listening on 9 wouldn't hear me. Or as everyone above said, the repeater could have been down.
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