[Elecraft] [Elecfaft K3] Power Cycle

[Dave & Jeanne]

Thanks for the information. Very interesting and it fully explains why 
it is important to do a power reset after a firmware upgrade.
73
Dave KD1NA

On 2/7/2011 10:45 AM, Dick Dievendorff wrote:
> There is a subtle difference. The K3 Utility does indeed issue a command that causes a reset. However pressing the power button initiates what Wayne calls "parameter save" where selected parameters (like the VFO frequency) are saved to EEPROM for use after the next start.
>
> So power off and on is just a bit more than reset.
>
> Config save preserves this EEPROM. During restore I write to that EEPROM, then reset the MCU. During startup the newly restored EEPROM is used to set up RAM versions  of config. Restore wouldn't work if EEPROM were written as part of the post-restore reset.
>
> To see this at work: turn the VFO to 7.00000 MHz, then turn the radio off and on. It should come back at 7.000 MHz. Then turn the VFO to 7.050. Then load firmware. After the firmware reset completes, what VFO setting do you see? That's the EEPROM parameter save at work. If you save and restore config, the current VFO setting us one of those settings.
>
> Dick, K6KR
>
> On Feb 7, 2011, at 7:34, "David Robertson"<darjar at comcast.net>  wrote:
>
>> Everyone,
>> Many times by both the K3 engineers and others it has been stated to recycle the K3 power after doing a firmware upgrade. I understand the logic behind this action and do perform a power reset after doing a firmware upgrade or reload.  My question is this. Every time a firmware upgrade is installed there are several apparent power resets that occur, even after the firmware install is finished. Am I correct in assuming these apparent power resets are not complete resets?
>>
>> Thanks and 73
>> Dave KD1NA
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