Why Don't My "Band Edge Beeps" Match The Us Amateur Bands; Can I Transmit All The Way Out To The "Band Edge Beeps; Can I Reprogram The "Band Edge Beeps; Do We Know Anything About The "Band Edge Beeps - Icom IC-746 Faq

http://www.farcircuits.net/dtmf1.htm
have some circuits that might be adaptable. Perhaps someone could base a design upon the
NS TP-5089?
http://alds.stts.edu/datasheet/DTMF/NS-TP5089.pdf
http://www.boondog.com/%5Ctutorials%5Cdtmf%5Cdtmf.htm
Another approach is to let your nearby PC generate the tones. Those with PSK31 (or
equivalent) audio interfaces will find this relatively easy to do. Here are a few of the many
DTMF programs for the PC:
http://www.silverstones.com/DTMFdial.html
http://groups.yahoo.com/group/IC746/files/Dial.zip
6.9

Why don't my "band edge beeps" match the US amateur bands?

Nobody knows what (if anything) the band edge beeps correspond to.
6.10

Can I transmit all the way out to the "band edge beeps"?

Yes, you can transmit all the way out to the beeps. The IC-746, as shipped from the factory,
can transmit outside of the amateur radio bands. This has been tested and confirmed on
several rigs via dummy loads.
6.11

Can I reprogram the "band edge beeps"?

No, there is no known way to reprogram the band edge beeps.
planned updates from Icom dealing with them.
You can, however, turn them off entirely.
6.12

Do we know anything about the "band edge beeps"?

The band edge beeps generate a lot of discussion and speculation. As of October, 2002, the
band edge beeps on all tested rigs (both 746 and 746-PRO) correspond to:
1.8 - 2.0 MHz
3.4 - 4.1 MHz
6.9 - 7.5 MHz
9.9 - 10.5 MHz
13.9 - 14.5 MHz
17.9 - 18.5 MHz
20.9 - 21.5 MHz
24.4 - 25.1 MHz
28.0 - 30.0 MHz
If you know of an ANY rig that differs from this, then please let us know.
Rumor has it that the IC-756-PRO and IC-756-PRO-II have the exact same behavior.
IC-746 FAQ
Page 74 of 113
2003-02-08
There are no fixes or