Looks good George!
MY QO100 SETUP
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Hi George,
on the NB TPX the bandwidth is limited to 2.7 kHz. Thus Spread Spectrum makes no sense.
On the WB TPX you can try Spead Spectrum Schemes but please make use of the chat channel in the WB Spectrum Monitor to announce your tests.
Kind regards
Matthias
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On the WB TPX you can try Spead Spectrum Schemes
??
Matthias, present not included in the bandplan ..... -
Hello Robert,
yes and no. It will be difficult to allocate part of the transponder to new modes as long as those have not been implemented.
In my opinion it was never out of the question that AMSAT-DL encourages new wideband modes.
Testing those modes should be announced on the chat channel of the spectrum monitor to avoid interference with other users.
If we see that a new mode is getting adopted by more user we can of course still adapt the band plan and allocate part of the spectrum of the wide band transponder to such new modes. Yet I think it is too early to do this. Let us see the results of the tests first.
Kind regards
Matthias
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hello help pll ADF4351 PIC12F675
i made the converter 433 mhz / 10489 for qo-100 as LO I use pll ad4351 with controller pic12f675 i as a reference I use external 10 mhz of the isotemp 131-100 it is very good problem that if I turn on the pll the lock does not turn on if I turn off then I turn on first the external reference 10mhz and then I turn on the pll so does any idea work?
i used this project;
http://www.f5ubz.fr/adf4351/ADF4351_F5UBZ.html
thank
73 de iw5bsf Roberto
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Hi Roberto,
If you do not connect the 10MHz, power on, see that the PLL doesn't lock, then pulse the MCLR on the 12F675, does the PLL lock then?I've made something similar, but with attiny13, it can be found elsewhere on this forum. I don't have the problem you have: PLL always locks when 10MHz is connected.
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hello not lock only if I first turn on 10 mhz connected then of lock I had tried with attiny 13 usual problem
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12f675 pic
I noticed that touching the pin mclr pic 12675 with the finger of the hand restarts the lock
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I found I was able to reproduce the "non lock" with an eval board, and I have a theory of what is happening
Looking closer at the datasheet of the ADF4351, it seems that "programming the registers" does more than just load values it it, a number of circuit selections happen inside the chip while the programming process is happening. This is why the registers must be programmed in a certain sequence: R5, then R4, then R3, ... last R0.
If there is no reference frequency during the process then it will fail.
If you power-up the adf4351 with a reference, then remove it, then connect it again, the PLL will lock. The problem is if the PLL is that if the PLL is programmed when the reference frequency is missing, the programming doesn't seem to work.
My suggestion would be to make sure that your programming includes correct programming of the Lock Detect output, then change the programming of the 12F675 so that after programming you wait a bit, wait for Lock Detect to go active, and if not, re-start the programming process. I have not tried it, but your "touch the MCLR" suggest this will work.
I'm nervous about the "touch MCLR" comment. Does this pin have a pull-up resistor? -
Thanks for the answer, I use the pickt3 as a programmer following some indications on the net I put a resistor between VDD and MCLR for programming
the sequences in the asm file up to these:
EEPROM LOCATION
DE 0x00, 0x7D, 0x80, 0x10 ; register R0 2514,000Mhz // ok
DE 0x08, 0x00, 0x80, 0x29 ; register R1
DE 0x00, 0x00, 0x4E, 0x42 ; register R2
DE 0x00, 0x00, 0x04, 0xB3 ; register R3
DE 0x00, 0x85, 0x00, 0x3C ; register R4
DE 0x00, 0x58, 0x00, 0x05 ; register R5
therefore the sequences must be reversed
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I took a look after reading your directions datasheet 4351 page 22 it says register 3 also serves to determine TIMER AND FAST LOCK REGISTER SEQUENCES TER
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hello
I found this information interesting
on pic 12f675
