https://youtu.be/d0X91hppyvo?si=KeYJEEbSXWksak9v
9 minute video from feb 2024 "PSEC 700 Radio Testing vs RFD UHF System Fireground Operations" very cool - 9 minute video - seems that 'county' and 'cmd 3' were on repeater - and 'tac 6' was direct - county was digital - city was analog - at the very beginning digital crapped out with the fan running which apparently had more to do with background noise than radio waves / radio pathways PSEC = the new county 700 mhz trunked radio system (TRS) guessing that county 700 was on repeater since it crapped out totally in the man down in the basement to repeat - the radio systems are different in several ways - city is 460 mhz and analog - county is 700 mhz and digital - also - county is trunked but city is not - but that probably was not a major factor here and there is also the difference between repeater channels and direct channels - "direct" channels do NOT use a repeater - so you could call the 'direct' channels 'nonrepeater' channels they need to go back and test 700 digital direct - there should be some direct channels in those new radios - thats the only way to get a real 'apples to apples' comparison on uhf - they might have MO3 also - so thats another complicating factor - (MO3 would be a repeater in the fire truck) - of course the county radio might have had a MO3 also this was a great first step in the testing process - they need to do more testing with more channels and in more sites - and with and without the loud background noises anyone who does not really understand how repeaters work will have a very hard time figuring this video out let me do a quick repeater explanation - a repeater is 2 radio boxes that sit on the top of a hill - one box is a radio receiver box - it listens for traffic on frequency 1 - the 2nd radio box is a radio transmitter box - it transmits out on frequency 2 - there is a wire that runs from the radio receiver box TO the radio transmitter box - when the radio receiver box picks up a message on freq 1 - it immediately ships it down the wire to the radio transmitter box - the radio transmitter box then immediately transmits the message out via freq 2 If Riverside City FD Command Channel 3 is 460.60 - then the repeater is listening on 465.60 - and transmitting on 460.60 if anyone needs help with this stuff - drop me a note at zerg90 at gmail -- shes got a kid ... together - https://youtu.be/IQQ-hxIwm70?si=8jrwZRcfZg-vN4Ye&t=237 -- You received this message because you are subscribed to the Google Groups "massfire" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/massfire/CAFXWwKa77Fd-zNVTnNN7Be3LtXQwbLr%3DM7t5HLQO3yAy11_xfw%40mail.gmail.com.
