[RTTY] Jitter

[David G3YYD]

Hank

The TX bandwidth for 45.45 baud FSK is dependent on the radio rather than
the system used for keying within reason. Obviously if the keyer is
producing lots of short transients then it will widen the bandwidth unless
the FSK is well filtered within the radio.

As for timing jitter, why keep it when it can be avoided? This will save
having to repeat an exchange when it would have been copied first time if
the TX was jitter free.

Much better to use AFSK or 2Tone DOOK. By the way 2Tone AFSK is narrow just
not as narrow as 2Tone DOOK.

73 David G3YYD


-----Original Message-----
From: RTTY [mailto:rtty-bounces at contesting.com] On Behalf Of Hank Garretson
Sent: 26 February 2018 20:42
To: RTTY Reflector
Subject: [RTTY] Jitter

I understand that MMTTY FSK and Windows results in transmit jitter.

I use MMTTY K3 FSK. 2Tone tells me I have jitter.

I understand that my jitter reduces copy-ability (somewhat) for stations I'm
working.

Question: Does my jitter increase my transmit bandwidth?

Or put another way: If I switch to TinyFSK, will my transmit bandwidth be
reduced?

If yes, by how much?

Diddle Exuberantly,

Hank, W6SX
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