Dual beeps during dispatch transmission

[technogizmo007]

Recently, anytime dispatch broadcasts on our EMS channel, there are dual beeps that are included every ~10 seconds over tones and voice, only when dispatch broadcasts, not other mobiles/portables. They only come on this channel (Motorola Centracom broadcasts on 6 channels total, all VHF except one 800mhz channel, only comes through on this channel, even when simulcasting). EMS channel is one tower, no repeater, uses PL tones. Any idea what they indicate and how to fix them? Here is a link to a video recording of the broadcast: https://youtu.be/-sAAny8WhcU
Thanks for your help!

 

[Thunderknight]

Might be some type of alarm notification tone being inserted by the base station. Power failure, high SWR, PA failure, etc. The first step would be for the radio shop that maintains it to look at it. If they aren't sure the source, then see if it is coming up the circuit from dispatch or not. If not, then it's being inserted by the base station. Next check would be an power/SWR check.

 

[sfd119]

Almost sounds like something is running on battery. When our system goes on battery, one beep was on battery, two beeps was battery getting lower.

 

[wildbillx]

Sounds like it is a warning beep associated with a problem with the tx radio like reflective power.

 

[SteveC0625]

Could be that the Channel Marker is on. A quick call to dispatch should answer that question.

 

[talviar]

2 quick beeps on most Motorola base stations now is a sign of a Power issue (either too low or two high)

Basically- let the dispatch center know- they may have an issue. . . . .