MDC1200 complaints

[anehring43]

There has been a sudden complaint of the post MDC chirp in my area of my county. Three departments in my immediate area use the system with proper and matching IDs and has been very beneficial in the field and in trainings together for years. The complainer does not use the system so I think that is why they find it annoying (I dont hear it anymore, just part of the transmission)

To make things nice in the sand box, is there a way to mute the chirp from the TXing radio? I understand the DOS muting on the recieving side and all of our radios are set for 175ms. I guess another way of asking this is, can you transmit MDC IDs without the squelch? We operate on an analog VHF-lowband system, the complainer works for a company whos radio system is digital and has IDs with no chirping, so i'm assuming he thinks that it can be done on an analog system. I tried explaining the difference but it fell on deaf ears, because he is always right

APPARENTLY, the county radio tech has recieved an email from MOTO explaining the way to make this happen. Has anyone heard of this? Is it possible? Or should he just put his new big boy pants on and deal with it?

 

[kg9nn]

It's a definite maybe.

We installed a Cimarron C-Plus decoder at the repeater, then programmed it to mute the receiver during MDC IDs. As a side benefit, it limited access to the repeater to only those with a valid MDC ID. The downside was that MDC IDs weren't passed through the repeater anymore so only dispatch saw them. But no one had to hear them

Now, later on, we put the VQS boards in the radios and had the repeater pass the MDC IDs instead of muting them. Now everyone could see on their alias display who was talking and the boards in the radios muted the MDC ID.

But, anyone without one of those boards was stuck listening to all the noise. However, the VQS boards (and probably the Motorola radios) could send MDC without CTCSS, provided the repeater passed all signals. Then again, if only dispatch needed to see the IDs, that wouldn't be a problem, now would it?

 

[com501]

If the other department is not using MDC now, but using Motorola radios, enable MDC signalling on their receive personality, disable MDC display ID, and make sure their DOS mute is enabled. Then their radios will mute on the MDC like yours do.

 

[svfd17]

Or you could change the IDs on your radios and alias the original unit IDs