Which digital receiver?

Forum for DMR, dPMR, NEXEDGE, Mototrbo, MARC, Tetra & all other DIGITAL modes

Re: Which digital receiver?

Postby mark99 » Sat Nov 14, 2020 11:47 am

A transceiver will be a fraction of the cost of a DMR scanner.
As much as a tenth of the price.
Advantages, it can be set to RX only.
It wont be as deaf as a post like most of the digital scanners.
Many now have promiscuous modes so you can listen with colour codes and talk groups or capacity + admin .
They can be programmed with encryption keys.
Many things like shop watches now are either Mototrbo basic privacy or hytera basic privacy keys.
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Re: Which digital receiver?

Postby Metradio » Sat Nov 14, 2020 2:26 pm

mark99 wrote:A transceiver will be a fraction of the cost of a DMR scanner.
As much as a tenth of the price.
Advantages, it can be set to RX only.
It wont be as deaf as a post like most of the digital scanners.
Many now have promiscuous modes so you can listen with colour codes and talk groups or capacity + admin .
They can be programmed with encryption keys.
Many things like shop watches now are either Mototrbo basic privacy or hytera basic privacy keys.


Fine as long as you know where to listen...

Mike
Connect Systems CS750 and CS800, Hytera PD-365, Motorola DP4600.
Raspberry Pi 2 and DV4Mini HotSpot.
AOR AR-DV1 Digital Voice Receiver / eSPY on ARD.
WS1088 / TRX-1 / Whistler Q /UBCD3600XLT / WTR Browser.
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Re: Which digital receiver?

Postby jimh » Sat Nov 14, 2020 4:07 pm

While some could be nearly 10 times, many digital scanners will be about 3 times more expensive than a transceiver.
Several transceivers are now front panel programmable and dual band, but watch out for those that aren't.
A transceiver is of no use if Motorola RAS is enabled (which is just as common as encryption, especially on shopwatch type schemes)
Enhanced (often RC4-based) encryption is more common than basic privacy, 40bit - so that's 1099511627776 possible keys unless you know it already.
Hytera encryption will specifically require a Hytera radio. Most chinese manufactures implement their own form of encryption but none of these will be compatible with Motorola Basic Privacy
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Re: Which digital receiver?

Postby moj » Sat Nov 14, 2020 9:18 pm

Jimh explained it perfectly ;)

The other recent killer to scanning is where they are now able to hide the talkgroup info which has been sent !

this is programmable into all hytera radios ota , even dsd shows no kind of talkgroup info and stays blank so when a hytera radio is setup this way so it impossible to program your own radio to listen in, another nail added to the scanner listening coffin !
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Re: Which digital receiver?

Postby jimh » Sun Nov 15, 2020 11:48 am

moj wrote:The other recent killer to scanning is where they are now able to hide the talkgroup info which has been sent !

Thanks Moj....that's interestings. Are you able to share any further details of this Hytera feature? I've not seen mention of this before. Is that the fixed channel TX contact feature?
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Re: Which digital receiver?

Postby mark99 » Sun Nov 15, 2020 12:09 pm

A memorandum security alert was issued last year instructing all town security radio systems to secure their networks in response to the heightened alert .
Covid had delayed this slightly, but it will be implemented .
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Re: Which digital receiver?

Postby Metradio » Sun Nov 15, 2020 2:17 pm

And of course all councils will do as their told by national government :)

Mike
Connect Systems CS750 and CS800, Hytera PD-365, Motorola DP4600.
Raspberry Pi 2 and DV4Mini HotSpot.
AOR AR-DV1 Digital Voice Receiver / eSPY on ARD.
WS1088 / TRX-1 / Whistler Q /UBCD3600XLT / WTR Browser.
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Re: Which digital receiver?

Postby rovman » Sun Nov 15, 2020 3:59 pm

I have notice here in Colchester that some of the local shop watch DMR channels no longer work , Before the radio would detect DMR and tell you Slot + Col to switch to but it no longer does this but the signal is still there I can only assume that they have changed encryption as all the other active DMR channels work fine and this has only happen in the past few weeks .
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Re: Which digital receiver?

Postby mark99 » Sun Nov 15, 2020 6:05 pm

Contracts with suppliers who are unable to implement encryption or simply dont understand it wont be re ordered.
Its sh1t or bust now for the contracts, they have been told to get it secured.
They are the eyes and ears of the town centre and the comms need to be secure and they will be.
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Re: Which digital receiver?

Postby G4RMT » Fri Nov 20, 2020 11:08 pm

I can't imagine using any of my numerous digital radios as a scanner - once you programme any of the current radios with code plugs with lots of contacts and talk groups scan speed is terrible. The one thing that worked fine on the Whistler I sold was the scan speed, even when heavily populated. I've not found any of the common radios much use as scanners, as so many of them are totally unable to enter things they find into their memories - the OS doesn't seem to think this is a useful feature.
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