Is there a software maintenance mode?
As of UV-3R sold until January 2012 (Mark I and Mark II) there is no software maintenance
mode. If it is there, nobody has figured out how.
My UV-3R just completely reset itself. Why?
If the frequency on the display was outside the normal range, e.g. 133MHz, when the UV-3R
was turned off, it will completely reset itself to the factory default when you turn it on.
Heinrich DB9PU explains:
The firmware checks the active frequency during the shutdown procedure and, if the
frequency is outside the firmware range of allowed frequencies, an internal failure of
the microprocessor is assumed and a hardware reset will be made.
To avoid this:
1. before switching off choose a channel with a frequency in the range 136 to 174 or
400 to 470MHz
2. switch off.
NB: in order to get into this condition you must have played with the configuration file of the
UV-3R PC software and recorder an “out-of-band” frequency. This is NOT a normal condition
your RTX can get into, so you should not worry if you are not doing anything strange with the
software.
Is it possible to change radio calibration settings with
the provided software?
As of October 2011 it is not possible to change UV-3R calibration settings. From message #342
(http://groups.yahoo.com/group/UV-3R/message/342):
I also (mostly) reverse-engineered the UV-3R memory map. Unlike previous work
with the FT-817, I didn't have to write my own program as the UV-3R program
includes a handy function that shows the EEPROM map *and* changes that have
occurred if you modify a setting. Using a normal HEX editor program, it's easy
to figure out where the header is and make "additional" changes if necessary -
although it's possible to make some changes that cause the PC program itself to
crash when you load the memory map!
The upshot of this is that there does not appear to be any obvious place in
there where other parameters may be changed, such as the amount of audio
deviation, PA bias (to effect setting of the High/Low power and, to an extent,
the harmonic content.)
If such values are stored in nonvolatile memory, they are either hard-coded into
UV-3R FAQ v. 2012-01-27
Page 30
