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ID using MCW rather than CW

Posted: Tue Jul 09, 2019 4:02 pm
by G4AON
The Shark ID is currently sent by keying a carrier on/off, other hotspots send a carrier that has an FM modulated keyed tone that is easy to copy on any hand held.

While there is little point in transmitting ID on a unit that radiates no further than a car remote locking key, if necessary for licensing purposes can the Shark ID be changed to a mode that can be heard on an FM hand held?

73 Dave

Re: ID using MCW rather than CW

Posted: Tue Jul 09, 2019 4:12 pm
by HA2NON
The currently transmitted unmodulated carrier wave satisfies regulatory requirements.

Re: ID using MCW rather than CW

Posted: Tue Jul 09, 2019 4:18 pm
by G4AON
HA2NON wrote:
Tue Jul 09, 2019 4:12 pm
The currently transmitted unmodulated carrier wave satisfies regulatory requirements.
It might well do, but as a seasoned ex professional Morse operator, even I find it hard to work out my own ID from a Shark using an FM hand held...

73 Dave

Re: ID using MCW rather than CW

Posted: Wed Jul 10, 2019 7:49 pm
by Tyrbiter
G4AON wrote:
Tue Jul 09, 2019 4:18 pm
HA2NON wrote:
Tue Jul 09, 2019 4:12 pm
The currently transmitted unmodulated carrier wave satisfies regulatory requirements.
It might well do, but as a seasoned ex professional Morse operator, even I find it hard to work out my own ID from a Shark using an FM hand held...

73 Dave
Don't think MCW is possible using the ADF7021 modem, it's not intended for analogue modes.

Re: ID using MCW rather than CW

Posted: Wed Jul 10, 2019 11:42 pm
by G4AON
Tyrbiter wrote:
Wed Jul 10, 2019 7:49 pm

Don't think MCW is possible using the ADF7021 modem, it's not intended for analogue modes.
There’s an ADF7021 in my MMDVM hat sitting on a Raspberry Pi, running under Pi-Star. That sends FM MCW which sounds fine on an FM handy.

73 Dave

Re: ID using MCW rather than CW

Posted: Thu Jul 11, 2019 7:54 pm
by Tyrbiter
G4AON wrote:
Wed Jul 10, 2019 11:42 pm
Tyrbiter wrote:
Wed Jul 10, 2019 7:49 pm

Don't think MCW is possible using the ADF7021 modem, it's not intended for analogue modes.
There’s an ADF7021 in my MMDVM hat sitting on a Raspberry Pi, running under Pi-Star. That sends FM MCW which sounds fine on an FM handy.

73 Dave
I have 3 Pi Zero Ws with HS_HATs, but I've never enabled the CWID.

I suppose I should read the code to see how to do it, have to say that the ADF7021 data sheet doesn't say much about non-FSK modes.

Ah, I see what has been done, they use 4FSK to simulate FM deviation by stepping through +1, +3, +1, 0, -1, -3, -1, 0 offsets. Apparently Andy that writes the modem code did this about 18 months ago.

Re: ID using MCW rather than CW

Posted: Wed Jul 24, 2019 8:21 am
by G4AON
In beta v48 the MCW CW ID works fine, great news!

73 Dave

Re: ID using MCW rather than CW

Posted: Tue Jul 30, 2019 8:57 pm
by Tyrbiter
G4AON wrote:
Wed Jul 24, 2019 8:21 am
In beta v48 the MCW CW ID works fine, great news!

73 Dave
Good news. At least that should make those that care happy.