[DSP-10] New ver 3.96 of UHFA.EXE
Bob Larkin
boblark at proaxis.com
Mon Mar 3 00:04:22 EST 2014
Hi All,
I posted a new version, 3.96, of the PC DOS executable for the DSP-10:
http://www.proaxis.com/~boblark/uhfa396.zip
This unzips to the files that need to be present to make the DSP-10
operate. There is a read-me file there, as well as an updated help file.
The biggest differences with 3.94 /3.95 are:
* An old, old bug that would occasionally produce an "E2 DSP-Status"
error has been fixed.
* The milliHertz addition has been extended to restore from shutdown,
or to save in memories.
Version 3.94 and later included the milliHertz capability, when used
with version 35 of later of the UHF3 program in the DSP. What that does
is to make the tuning number for the 3rd I-F LO (10 to 20 kHz) into
24-bits, allowing a display resolution of 1 milliHz and a tuning step of
1.43 milli Hertz. It used to be 16-bits.
Some details:
As before, the milliHz display/entry resolution is toggled on and off
with SCRL-Z (or -z). If it is off, you do not see the extra three digits
in the frequency readout, nor is it used in setting the transmit or
receive frequencies. This all happens at the nearest integer Hertz.
But, starting with 3.96, the milliHertz detail is kept with all
frequency info, such as VFO or Memory settings. It is saved at shutdown
in the UHFA.CFG file. And it will always come back with Scrl-Z.
Six new keys are defined to do direct tuning at the high resolution
Scrl Ctrl Alt Shift F9 Down 1 milliHz
Scrl Ctrl Alt Shift F10 Up 1 milliHz
Scrl Alt F9 Down 10 milliHz
Scrl Alt F10 Up 10 milliHz
Scrl Shift F9 Down 10 milliHz
Scrl Shift F10 Up 10 milliHz
None of these keys are active, unless the Scrl Z toggle has the milliHz
being displayed and used.
ALT-9 direct entry box is available for this and allows entry of 12
digits, like 432.123 456 789
The option to display and use milliHz is stored in the CFG file as the
variable show_freq_detail. It can be edited in the CFG file, as with
all variables.
All these changes work on either the DSPx or the EZ-Kit Lite DSP.
The DSP-10 home page http://www.proaxis.com/~boblark/dsp10.htm has been
updated to reflect these changes. Mike, KD7TS, has updated the User's
Manual and Jimmy, W7CQ, has updated the Command List. Thanks to Mike
and Jimmy for all the testing, help and ideas.
And, why? This first came up with some KD7TS-PUA experiments on
2-meters where we were measuring the Doppler shift on our 200 mile
path. The output of the DSP-10 ran into Spectrum Lab with a precision
sample rate clock. By knowing all the frequencies precisely,
interesting measurements are possible. I bet there are many other
uses. We just aren't used to having the capability.
73, Bob W7PUA
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