Plenty of errors to be found in comments and documentation, including mine.
Better off obsessing with how it works than what the documentation says.
> WOW. Has this always been there ??
Been there for awhile.
I doubt it's "trivial".
And for UHF, I'd use an Si5338 or Si5341 instead of messing with doubling the Si5351,
But yes, seems reasonable to do.
You can get years of tinkering out of that $109 investment,
if that's what you're looking for.
toggle quoted message
Show quoted text
On Wed, Mar 14, 2018 at 05:54 pm, Michael Shreeve wrote:
Well, wrong or right isn't what I'm looking for, but the basic detail I was interested in here:?
Likewise, a high side clk1 of 56995000 hz? for USB always flips the sidebands when translating to 12mhz,
however the low side clk1 of 32995000 hz we use to receive the 7.2mhz LSB signal does not:
corresponds to what I measured basically. The high 57 is used for usb, and the low 33 is used for lsb.
And of course, that doesn't match (at least last I looked) what Ashhar says. The description text is a little vague, but the block diagram specifically says 33 for usb, 57 for lsb. Maybe just a typo, but not sure.?
If my counter is on freq, which I still haven't determined, the frequencies I'm measuring seem to indicate that possibly each raduino is matched to the radio, and the master clock actual frequency wouldn't be so important if some of the calibration routines are used. The radio would still be fairly accurate. I should know soon. thanks again.
A part of Ashhars writeup that I did not notice before is down below,?
"?VHF/UHF coverage?With the 45 MHz IF, it is trivial to build band-pass filters with microstriplines for 144 MHz, 220 MHz and 432 Mhz frequencies. The Si5351’s clock may not high enough for the first conversion directly at 432 Mhz but a sub-harmonic mixer that works with only half the local oscillator frequency can easily scale this rig for VHF/UHF work. MMICs like the MAR6 series and power modules from Mitsubishi can easily scale this radio to reasonable performance level for weak signal and satellite work."?
WOW. Has this always been there ??
?
?
