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Anyone else using the IV menu in U3S firmware? Possible bug?

 

Chris Wilson 06 January 2018


V3.12a has a IV menu option to give 180 degree out of phase outputs
from CLK0 and CLK1 of the Si5351A synthesizer. Mainly for people like
me wanting to drive a Class D push pul amp FET driver direct, probably
on LF or MF.


I am seeing a high frequency being produced at the end of a WSPR2 TX
session on CLK1. CLK0 behaves itself with no output. Whilst the
output on CLK1 is weak and probably unable to trigger the IC driver,
is this expected and do others see this? Other menu setting possibly
of relevance is X2 is *NOT* selected. I think this signal is also
there after going through any menus and pressing the right button.

Thanks 2E0ILY



--

2E0ILY
Best regards,
Chris mailto:chris@...



--
Best regards, Chris Wilson (2E0ILY)
 

Hello QRP Lab people again,

This excerpt from the user manual came to my mind, I have a feeling
what's happening is for whatever reason CLK1 *IS NOT* having the Park
mode reliably disabled when Iv is set to 1. Probably only Hans can
delve that deep! But if anyone feels like `scoping CLK0 and CLK1 with
Iv set to 1 ad X2 off I'd sure appreciate confirmation of what I am
seeing here. Thanks.


"When Iv (Inverted Clk1 output) is enabled in the U3S, the Park Modes
are disabled. The Iv setting overrides the Park mode settings. This
is because the park modes also use the Si5351A Clk1 output"

Saturday, January 6, 2018

Chris Wilson 06 January 2018

V3.12a has a IV menu option to give 180 degree out of phase outputs
from CLK0 and CLK1 of the Si5351A synthesizer. Mainly for people like
me wanting to drive a Class D push pul amp FET driver direct, probably
on LF or MF.

I am seeing a high frequency being produced at the end of a WSPR2 TX
session on CLK1. CLK0 behaves itself with no output. Whilst the
output on CLK1 is weak and probably unable to trigger the IC driver,
is this expected and do others see this? Other menu setting possibly
of relevance is X2 is *NOT* selected. I think this signal is also
there after going through any menus and pressing the right button.
Thanks 2E0ILY










--

2E0ILY
Best regards,
Chris mailto:chris@...
--
Best regards, Chris Wilson (2E0ILY)
 

Hello QRP / Hans,


Any ideas on this please?? Thanks :)

Saturday, January 6, 2018

Chris Wilson 06 January 2018

V3.12a has a IV menu option to give 180 degree out of phase outputs
from CLK0 and CLK1 of the Si5351A synthesizer. Mainly for people like
me wanting to drive a Class D push pul amp FET driver direct, probably
on LF or MF.

I am seeing a high frequency being produced at the end of a WSPR2 TX
session on CLK1. CLK0 behaves itself with no output. Whilst the
output on CLK1 is weak and probably unable to trigger the IC driver,
is this expected and do others see this? Other menu setting possibly
of relevance is X2 is *NOT* selected. I think this signal is also
there after going through any menus and pressing the right button.
Thanks 2E0ILY


--
2E0ILY
Best regards,
Chris mailto:chris@...








--

2E0ILY
Best regards,
Chris mailto:chris@...
--
Best regards, Chris Wilson (2E0ILY)

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