the program or are located in EEPROM on the processor itself and aren't readily
available with the supplied program - unless there's a "Calibration menu"
available that can be brought up in the radio that I don't know about...
From what I can tell, the ONLY on-board adjustment is frequency trimming:
There's a small potentiometer that adjusts the VCXO tuning voltage - but I've
not touched that since my UV-3R is just 300 Hz high on 70cm - hardly enough to
worry about!
Help! Display shows DDD.D25!
This happens when a UV-3R Mark II is programmed with an old version of the programming
software. Download the newest software version and try re-programming your UV-3R: it should
return to normal operation.
A solution from John WB1GCQ follows, posted on the UV-3R mailing list and reproduced here
with his authorization.
Here is what I did using the information provided by the Group.
1) If you have preciously installed the software for the UV-3R; delete it from the computer before
you start this procedure for the Mark II.
2) Download from the Files Section the Mark II software. Use v.1.09 - earlier versions may not
work. I also found this software on the 409shop site. Not sure if both are the same version.
3) Download the driver you require from the 409shop site. I downloaded the usb driver for
Windows XP. I did this even though I had the original driver installed. The install will inform you
if you have current driver or newer version available for install. In my case I installed the newer
driver.
4) Plug usb cable into computer. Go to Device Manager.Click on Ports and determine Comm
port assigned to Prolific usb to serial comm. Mine was Comm 6.
5) Run the UV-3R Mark II software from the shortcut on the Desktop. Click on Settings and
select an available Comm port. In my case I selected Comm 6 and clicked Ok to close.
6) On the grid at top it indicates Freq Range. The range 136-174/400-470 is presently selected.
Click on down arrow to right and another range 144-146/430-440 is shown. Click on this range
so it is now selected.
7) At this point my grid filled in the Channel 1 with a rx Freq of 146.0000.
8) My display on the UV-3R had DDDD25 on upper and DDDD25 on lower line at this point. Its
been that way for a week looking for a solution!
9) I clicked on Program on top line of grid and selected "Write to Radio". Got a dialogue box.
UV-3R FAQ v. 2012-01-27
Page 31
