Some experiments with Pin 8 (POWER ON) show that if it is asserted
(grounded per the Owner's Manual) it turns the K3 on just fine as expected. However if it is negated the K3 remains on. The Owner's Manual says it should remain asserted (grounded) until a PS0 command is sent before negating. Has the behavior of Pin 8 been modified in the firmware to make a momentary assertion sufficient? BTW, once turned on via Pin 8, and even though Pin 8 remains asserted, a front panel turn off via the Power button works to shut down the K3. That reinforces the notion the Pin 8 is really activating the K3 via the leading edge of the assertion only rather than the level of Pin 8. Clarification? 73 jim ab3cv ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
Momentary assertion is preferred. While leaving it asserted (grounded)
won't cause any particular issue, it won't allow the K3 to shut down (haven't tested this entirely). I use a USB controlled relay, assertion about 100ms to power on the K3, remotely. Rick wa6nhc/7 On 6/7/2017 8:36 AM, Jim Miller wrote: > Some experiments with Pin 8 (POWER ON) show that if it is asserted > (grounded per the Owner's Manual) it turns the K3 on just fine as expected. > > However if it is negated the K3 remains on. > > The Owner's Manual says it should remain asserted (grounded) until a PS0 > command is sent before negating. > > Has the behavior of Pin 8 been modified in the firmware to make a momentary > assertion sufficient? > > BTW, once turned on via Pin 8, and even though Pin 8 remains asserted, a > front panel turn off via the Power button works to shut down the K3. That > reinforces the notion the Pin 8 is really activating the K3 via the leading > edge of the assertion only rather than the level of Pin 8. > > Clarification? > > 73 > > jim ab3cv > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [hidden email] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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