I had a frequency lockup problem. I called to see if TenTec had a ROM
update that might help. They had a newer ROM, but they didn't think it
would help. I got the new one anyway, and when I put it in, the problem
went away. I don't have any idea as to the cause, but I never had another
Dan - W4TQ.
From: JEFF S JOHNSON <email@example.com>
To: firstname.lastname@example.org <email@example.com>
Date: Monday, October 04, 1999 6:04 PM
Subject: Re: [TenTec] Frequency lockup OmniVI+
>I don't know about the Omni-6 but on the Omni-5 I have done a master
>reset a few times if it starts to lock up or have any problem. To master
>reset remove the backup battery and while power is off press in reset on
>the side then hold in the clear button on the keypad. Then turn on the
>power there should then be two beeps one low and another higher pitched
>release the clear button and rig should be operating properly. Everything
>will be at default and all memory lost. If it won't you may need a new
>software chip. As long as the rig power is turned on at the rig, not from
>the power supply the power up should not cause lockup as the internal
>regulator board will be in play. Maybe someone with an Omni-6 can help
>73 Jeff, aa8ve
>On Mon, 04 Oct 1999 17:01:41 +0100 Piotr Tomczak <firstname.lastname@example.org> writes:
>> Well Elmers I try again...
>> I have problems with frequency lockup once a while while powering
>> omni VI+ up. (Still )
>> There has been only few responses.
>> One case is sure, it helps to have the power supply on all time. (as
>> Then the problem disappers.
>> I checked the power supply (Drake PS7) Any way are there any of you
>> old good PS7 from Drake to power your Omni ???
>> The PS7 power supply is clean and very stable even with 25A load
>> (not on
>> Actually I see some oscilaltions while the voltage is powered on
>> and off but it is about max 3 v overshut and the oscilations varies
>> 5 to 100nano secounds. Difficult to chatch it with Osciloscope.
>> One should notice that the Omni's power switch is OFF and only the
>> xtal owen is on.
>> Any way I get that lockup from time to time ,if you like it or not.
>> Does any bodyknow how the frequency is hold ? Is it stored in the
>> battery backuped RAM ???
>> Has any body looked at the RESET circuit of the controll processor
>> for OMNI
>> There is only a capasitor and resistor. This combination gives us
>> 10 - 20 mili sek REST pulse for the 80c32 processor. Normally it is
>> The industry standard specs it to 150 mile Sek.
>> May be the processor gets alive too fast ???
>> I decided to change over the RESET circuit with a monolitic reset
>> circuit from Dallas, it gives a stable 150 mili Sec reset puls after
>> voltage has
>> stabilize itself. The chip look like a small transistor with only 3
>> (suits fine in the position of the existing network)
>> Any sugestions ??? Need your help !!!
>> Piotr LA9HFA
>> · ·
>> Piotr Tomczak Ham call: la9hfa
>> Nera ASA Tel: +47 6724 3135 Fax: +47 6724 4445
>> 1361 Billingstad E-mail job: email@example.com
>> Norway E-mail home: firstname.lastname@example.org
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