On Monday, August 5, 2013 11:21:58 PM UTC-4, Fred McKenzie wrote:
I think I'm in over my head, trying to get D-Star to work with a new

IC-9100. My basic question is, how can I tell if the UT-121 D-Star

module is working?



Mine has the UT-121 installed. I can access menu M3, and everything

appears to work as far as programming is concerned. HOWEVER anytime I

transmit, the transmitter locks up. The only way I found to stop it

from transmitting is to turn off the radio. Listening to the output on

another FM radio, there is no modulation.



When tuned to a local D-Star repeater, a digital transmission causes

the radio's DV symbol to flash. Then the FM symbol starts flashing and

the DV symbol stops. There is never any indication of having received

data and the digital squelch never opens.



Questions:



1. If my UT-121 is working, what is the minimum that must be programmed

to get D-Star to work? Although I have entered data for the local

repeater, I think it should work with only MY and a UR of CQCQCQ in

order to transmit on a simplex frequency.



2. What happens when the DV mode is selected on an IC-9100 that does

NOT have the UT-121 installed? Does it ever show menu M3 when the MENU

button is pressed several times?



3. If Menu M3 does appear, can the various parameters (MY, UR, etc.) be

programmed?



4. If the microphone push-to-talk is pressed, does the transmitter lock

up, or does it stop transmitting when push-to-talk is released?



I have searched the web and found lots of helpful info on D-Star, but

nothing specific to my problem with an IC-9100. The radio is working

well in other modes.



Fred

K4DII

hi
i am ve6avk
from alberta canada,had the same problem
i found out that on page 181 reset cpu partial did work after installing a good ground on all radios as i seemed to have stray rf in the shack keeping the radio in xmit mode mic relased
73 jonn

Mechanical - physical ground strap from the ground stake outside to the transceiver does not solve RF problems.
As a matter of fact, if the ground strap is 9 feet long, it is a perfect 6 meter dipole - will cause more problems then it will solve.

In article ,
wrote:

hi
i am ve6avk
from alberta canada,had the same problem
i found out that on page 181 reset cpu partial did work after installing a
good ground on all radios as i seemed to have stray rf in the shack keeping
the radio in xmit mode mic relased
73 jonn

John-

In the process of troubleshooting, I did both a partial and complete
reset. That did not help. RF was not the cause, since I was using a
good dummy load.

Someone else reported the actual problem in another newsgroup. At least
in my case, the UT-121 D-STAR board was not seating correctly. It was
necessary to re-seat the board five or six times before it worked. I
believe this is a design flaw. Icom knows about it, but probably will
not do anything. It would be a major modification to change the tiny
connector along with using a new board.

When working, the transmitter does NOT lock-up when transmitting in
D-STAR mode. To use the radio on D-STAR, the minimum requirement is to
set your call letters in the MY field. It may even work without MY
being set.

Apart from the D-STAR problem, I have had some trouble with stray RF. I
have several Radio Shack ferrite choke cores on cables such as for the
external speaker and key. In one case, the problem was RF getting into
the old Accu-Keyer and causing it to lock up!

73,
Fred
K4DII

I think you are confused - you did not put Ferrite Choke Cores on your cables,, you put Ferrite beads.. http://en.wikipedia.org/wiki/Choke_%28electronics%29


Radio Shack Ferrite beads are not manufactured to any sort of specifications - hence you would be just as well off using Cheerio's.