SP3OSJ
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OVI40 -> 1200MHz 23cm
« on: 05. May 2018, 11:56:13 »
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Hi
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| « Last Edit: 29. June 2022, 17:01:28 by SP3OSJ » |
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dl2eea
schon länger dabei
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Posts: 59
Ich liebe meine Frau!
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Re:OVI40 -> 1200MHz 23cm
« Reply #1 on: 05. May 2018, 15:44:24 »
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Super Artur!
You did in a short time TRX "SPARROW" and now you have developed a new TRX 23cm and unfortunately we have nothing new. Our OVI 40 stands still.
Congratulations on ideas and enthusiasm!
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DB4PLE
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Urgestein
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Re:OVI40 -> 1200MHz 23cm
« Reply #2 on: 05. May 2018, 16:15:19 »
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Hi,
I have to admit, that I could not follow some of what you wrote but I think I got the idea.
Software or colleagues will want to make changes to the firmware STM?
1) unblocking the transmitter for the operating band SI570 70.4MHz - 118.4MHz
(display: 17.6MHz - 29.6MHz)
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This is already possible (with very low output power), just go to menu and enable TX out of bands. Don't know about the required input power for your circuit. This might not be enough to drive the TRX.
2) Take that for the work SI570 70,4MHz was displayed on the display: 1240.000MHz
and for the SI570 118,4MHZ work the frequency of 1300.000MHz was displayed.
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If I understand your text correctly, you should be able to do this, just set XVTR Offs/Mult to 4 and XVTR Offset so that 17.6 Mhz are shown as 1240000.
I am willing to work on this if the currently existing firmware is not sufficient under the condition you provide the schematics for the Lapwing under a open license such as the OHL.
Technically we would/should define a new RF hardware boards, which needs to be enabled in the menu and then the UHSDR firmware automatically does the right things (frequency display, extended transmit frequency range etc.). It seems to me that it is not possible to automatically detect that a Lapwing board is connected, however.
73
Danilo
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DF5LI
alter Hase
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Ich liebe meinen SParrow !
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Re:OVI40 -> 1200MHz 23cm
« Reply #3 on: 05. May 2018, 19:23:50 »
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Ich frage mich nur, welchen Sinn ein 48 kHz breites Spektrum- und Wasserfalldisplay bei dem Band noch hat ? Das kann dann wohl wegfallen...
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73, Harri
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SP9BSL
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Re:OVI40 -> 1200MHz 23cm
« Reply #5 on: 06. May 2018, 09:24:05 »
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Hi,
as we talked with Artur on our Polish forum, we (I) can add code for ADF4350 to UHSDR firmware for setting the registers, have it working. We can then omit another cpu in this project and make it more flexible. I will use this chip for my RF board soon, so I will implement it anyway. The only one thing required is SPI port with CS which is already available on OVI40 board.
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73 Slawek
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SP9BSL
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Re:OVI40 -> 1200MHz 23cm
« Reply #7 on: 06. May 2018, 10:55:17 »
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Hmm, with 250kHz of span we are aproaching the DDC concept with more fancy (expensive) ADC/DAC chips, and without FPGA it may be not possible...
Edit: Or use the internal ADC with its limited dynamic to ~60dB...
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| « Last Edit: 06. May 2018, 11:02:03 by SP9BSL » |
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73 Slawek
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dl2eea
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Ich liebe meine Frau!
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Re:OVI40 -> 1200MHz 23cm
« Reply #11 on: 06. May 2018, 17:47:11 »
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You have finished projects and are happy to criticize them. and I praise it very much.
Congratulations again and admire your enthusiasm!
Josef
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dg9bfc_sigi
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DG9BFC
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Re:OVI40 -> 1200MHz 23cm
« Reply #13 on: 16. May 2018, 18:50:00 »
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very nice project that 23 cm trx ... hopefully it will work like you want it :-)
i nice idea would be 13 cm tx with 23 rx ... with a modded lnb (with 9 ghz lo) you then would have a nice setup for es hail
tx on 13 cm (is what es hail receives)
rx on 1200 megs ( (best would be 800 to 1500 megs receive)
depending what lo your modded lnb has you will have 800 or 1200 or 1400 megs rx signal from es hail
if finished you set up a sat dish towards 26 east ... and can work es hail like on the telephone ... grin
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peter_77
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THE mcHF and UHSDR forum !
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Re:OVI40 -> 1200MHz 23cm
« Reply #14 on: 02. September 2018, 14:15:09 »
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| Wir sitzen hier mit unseren UI Boards auf heißen Kohlen und warten sehnsüchtig auf das RF Board.... |
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Falls alle Stricke reissen hat Chris ja wieder seine 0.6er RF Boards zum Verkauf 
http://www.m0nka.co.uk/?page_id=740
Damit lässt sich das I40 UI Board ja wenigstens zum Leben erwecken....
Das "echte" wäre natürlich schöner. Zumal wenn es dann dafür ein passendes Gehäuse gäbe was mindestens genau schön aussieht wie das von Arturs SParrow !
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| « Last Edit: 02. September 2018, 14:17:12 by peter_77 » |
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