RE: [MT63] Frequency Setup
- Thanks for everyone's help.
Sometimes I automatically look for a difficult solution when the answer
is quite simple.
73 de Mack N9NTB
From: dalite01@... [mailto:dalite01@...]
Sent: Monday, October 22, 2007 12:18 PM
To: Brophy, Mack - DMA; MT63@yahoogroups.com
Subject: RE: [MT63] Frequency Setup
IMHO, the MT-63 terminal was written to remove the options that seem to
confuse and provide a simple to use application.
Here are some basic premises:
1. Starting Frequency is hard coded at 500Hz
2. Bandwidth, added to starting frequency determines center frequency
3. Interleave changes the time period in which the next bit of
information is transmitted, and the short interleave takes away FEC and
should be used on frequencies where good propagation between the sending
parties is confirmed before hand.
4. Bandwidth ultimately determines how wide the signal is, which
how much info can be processed at one time. Wider is faster in terms of
extrapolated WPM as a figure of merit.
With this in mind, if you were tuned to 14.100 (random example), and the
mode with 1000Hz Bandwidth, you would start making RF power at 14099.50
(14,099,500 Hz, which is 500 Hz below the DIAL freq)) and stop at
Rig control doesn't even work into the equation.
If you set your rig on the DIAL frequency (Either 1.5 KHz Above or Below
ASSIGNED frequency, depending on the sideband), the software will direct
sound card to send tones to generate power at the appropriate portion of
3.0 KHz bandwidth associated with the ASSIGNED frequency.
LSB Dial Freq is 1.5KHz Above Assigned freq
USB Dial Freq is 1.5KHz Below Assigned freq
Bandwidth of Assigned freq is 3KHz wide before signal enters into the
USB MT63 signals move up the band toward and past the Assigned frequency
approaching the upper limit of the 3 KHz surrounding the Assigned freq.
LSB MT63 signals move down the band toward and past the Assigned
approaching the lower limit of the 3 KHz surrounding the Assigned freq.
In both cases, the point at which RF power starts to be generated is the
starting frequency (offset). In the case of the hard coding in the MT63
Terminal, this is always 500Hz away from the DIAL freq, moving up or
dependent on sideband used. The RF power generation ends at the part of
3 KHz total bandwidth determined by the Bandwidth selected for the MT63
signal. In all cases, it moves toward, and possibly past the Assigned
Simple answer is that the software doesn't care what the transceiver is
to. I will make power and look for signal 500 Hs away from wherever the
transceiver is set, and send it in a direction dependent on Sideband
and bandwidth selected.
MixW gives you far more choices, but I don't recommend that anyone
using it out unless they have a grasp of the basic operation concepts
outlined above. If you try to jump on MixW, not using Rig Control,
the option of setting variable start freq, accepting automatic offset
standard sideband selection, you may find that you have too many options
choose from. Also, with the lack of a wide choice of MT-63 signals to
on, it can become very frustrating trying to master a lot of changeable
parameters on an elusive signal.
Having said that, both programs are capable of doing a great job of
as long as the sending station uses a starting frequency of 500 Hz.
FWIW, if the sending station uses a starting frequency of 1000Hz, with
MT-63 terminal (and also MultiPSK) you will have to invert the Sideband
tune off 3KHz to find and decode their signal; intercepting it in the
direction in which it is traveling. When you understand why that
you should be able to run any software that is available for MT-63.
I am not a MT-63 guru. I am just making observations that I believe to
constant, based on what I have observed running MT-63 the past few
From: MT63@yahoogroups.com [mailto:MT63@yahoogroups.com] On Behalf Of
Sent: Monday, October 22, 2007 11:55 AM
Subject: [MT63] Frequency Setup
This may be a dumb question but when doing the setup for my IZ9BLY MT63
software I cannot find where to setup the band and frequency that I
have the transceiver set at.
Is there somewhere similar to the MixW software band and frequency
setup for the IZ8BLY software?
Thanks for your help.
73 de Mack N9NTB
- No there is not.
Just use the big knob on your rig to tune.
Can't say about Mixw never have used it.
At 10:55 AM 10/22/2007, you wrote:
>This may be a dumb question but when doing the setup for my IZ9BLY MT63
>software I cannot find where to setup the band and frequency that I
>have the transceiver set at.
>Is there somewhere similar to the MixW software band and frequency
>setup for the IZ8BLY software?
>Thanks for your help.
>73 de Mack N9NTB
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