Skip,
MT63-1000 has a -5 dB minimum S/N, but MFSK16 has a -13.5 dB minimum S/N, so
the static tests you made must be at signal levels high enough that MT63-1000
decodes, which may not be a realistic level.
That is true. Fortunately, there are times when signals are above the decode
threshold
-
From: Tony
To: digitalradio@yahoogroups.com
Sent: Sunday, March 22, 2009 3:03 AM
Subject: Re: [digitalradio] THOR is static-proof (Re: KV9U - MT63)
Skip,
MT63-1000 has a -5 dB minimum S/N, but MFSK16 has a -13.5 dB minimum S/N,
so the static tests you made must be at signal
, March 22, 2009 3:04 AM
To: digitalradio@yahoogroups.com
Subject: Re: [digitalradio] THOR is static-proof (Re: KV9U - MT63)
Skip,
MT63-1000 has a -5 dB minimum S/N, but MFSK16 has a -13.5 dB minimum
S/N, so the static tests you made must be at signal levels high enough
that MT63-1000 decodes
To: digitalradio@yahoogroups.com
Sent: Sunday, March 22, 2009 9:58 AM
Subject: RE: [digitalradio] THOR is static-proof (Re: KV9U - MT63)
I would like to remind all, if you are not already aware, to turn AGC
off when static crashes are an issue.
If you are fortunate enough to operate in a mixed mode net
Tony wrote:
The most impressive thing about MT63 is how it seems to resist heavy
static crashes. I made a few recordings with short segments of
the signal removed to simulate this type of QRN and there was little
effect on copy.
What about THOR? Thor stated to be more static-proof.
Sent: Saturday, March 21, 2009 3:55 AM
Subject: Re: [digitalradio] THOR is static-proof (Re: KV9U - MT63)
Tony wrote:
The most impressive thing about MT63 is how it seems to resist heavy
static crashes. I made a few recordings with short segments of
the signal removed to simulate
particular mission out of all the many available choices.
73, Skip KH6TY
NBEMS Development Team
- Original Message -
From: Tony
To: digitalradio@yahoogroups.com
Sent: Saturday, March 21, 2009 5:05 PM
Subject: Re: [digitalradio] THOR is static-proof (Re: KV9U - MT63
Tony,
Further complicating the static crash test conclusions is the effect of the
static on the receiver AGC. If a long AGC constant is being used, the static
crash is going to desensitize the receiver for as long as the AGC holds the
receiver sensitivity above the decoding threshold. In such
