What is wide/narrow setting?
This setting controls RX bandwidth and FM deviation. These have been measured to be:
TX, max deviation wide, +/- 4.8kHz
TX, max deviation narrow, +/- 2.4kHz
Apparent RX -6dB bandwidth wide +/- 8kHz
Apparent RX -6dB bandwidth /- 4kHz
Adjacent channel selectivity measured as ETS300-086 was 70dB wide and 58dB narrow.
What does RelayM do?
Apparently it delays the return-to-receive after transmitting. This should cut the roger beep on
repeaters that add it automatically.
See
http://groups.yahoo.com/group/UV-3R/message/1921
for a possible answer.
Note: some older models and manuals refer to “ElayM” instead of “RelayM”.
What does the Save function do?
While the user’s manual says it reduces the transmitted power when the received signal is
strong, that seems to be a wrong copy-and-paste from a Yaesu manual.
Measurements have been made on the receive current consumption, and confirmed that the
Save function switches off and on the RX circuitry.
How can I do “reverse” on a repeater?
You can not. UV-3R does not carry the “reverse” command. Instead you can write your repeater
memories alternating
normal
and
reverse
.
How do I generate DTMF tones?
You can not. The radio chip is capable, but the firmware does not support it.
How do I set frequency scan limits?
You can not. UV-3R will scan the entire VHF or UHF band.
As a workaround you can program memories with simplex channels (spaced 10 kHz in IARU
UV-3R FAQ v. 2012-01-27
Page 21
