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Placing my own labels on my KiwiSDR
Hi,
I am currently running one KiwiSDR with a 70 cm transverter (only used the RX downconverter part).
Thanks to the extension of the RX to 32 MHz I can now tune between 430 MHz (at 25 MHz) and 437 MHz (at 32 MHz)
I would like to remove the current labels and attach my own labels for the converted frequency.
Or even perhaps when possible a converter setting so the KiwiSDR shows the actual frequency
Any thoughts on this ?
Thanks for your attention,
Ben - PE2BZ
Comments
[11.90,"CWN","Alpha%20F1%20RUS","navigation%20system",{"WL":1}]
Obviously, frequency, mode, label (URI encoded), I assume a label of some sort (exposed as "Notes"?), and then type. It would be helpful to know what the possible values mean, particularly for type (I can figure out what the possible values are for mode, and what they mean).
I'd like to be able to import the .csv files from the swskeds Yahoo Group.
These import directly into the Elad SDR software I've been using and I'd like to
do the same thing with the KiwiSDR software.
Not sure where to start though (yet) and don't want to reinvent the wheel if
someone has already looked at this.
Cheers, Chris
{"o":-1030}] will show the triangular carrier symbol on 350 kHz but center the cwn passband on 350 kHz - 1030 Hz = 348.97 kHz. This hack is so that in a crowded NDB band you can see which carrier is associated with the cw sideband you're listening to."
above.
When creating my own labels I found that, dependent on the "mode", the guideline of the label (pointing to the frquency) is not positioned correctly.
My suggestion for a future overhaul of the labelsystem would be:
It seems that "(N)CW mode" is not actual CW decoding (which would sound a tone dependent on the presence or absence of a carrier), but in fact a form of USB/LSB decoding. The hight of the perceived tone depends on the difference between the actual transmit frequency and the tuned frequency.
With CW the indicated frequency should be the exact frequency of the carrier. In this case "Offset" could be (mis)used as some sort of BFO/Clarifier. Frequency should indicate where the center of the passband is. The little yellow line should be at Frequency+Offset (Offset can be negative). The user can set the hight of the tone with "offset" and the center of the label would be exactly over the transmit frequency.
Jan / PE1OSQ
Note: for people who are not familiar with "NDB".
NDB's are Non Directional Beacons used to indicate the position of landing strips in aviation.
NDB's transmit an AM signal with a frequency around 300-500kHz (NDB utility band) and a bandwith of about 1kHz.
NDB's identify themselves by modulating their AM carrier with a three letter morse code in audio (i.e ROT is Rotterdam and ONW is the id
of Antwerp airport).
Because morse is a single tone the AM sidebands are very narrow. There is lots of QRM on longwave so listening to NDB's in USB makes a
lot of sense. Normally I use USB decoding with a carrier frequency at the frequency of the beacon and a passband of about 50Hz centered
on where you can see the sideband in the waterfall.
If you get the hang of it hunting for NDB's of far away airports can be a lot of fun (and with Kiwi's all over the world your can listen everywhere)
See the dozens (if not a hundred) other comments about this issue earlier in the forum.
If my posting was percieved as such, then I am truly sorry.
English is not my first language...
I merely tried to illustrate that sticking to the "official way" (frequency = suppressed carrier) would prevent confusion.
I am very much aware that different people have different preferences.
On my ICOM SDR there even is a menu setting to switch between the "frequency = carrier" and
"frequency = passband center" representation. In my opinion, implementing this on the Kiwi would
be overkill and a terrible waste of time.
So, no problem at all if the Kiwi continues the "frequency=passband center" representation.
But in that case, in USB/LSB mode, please let the frequency always be the center of the actual
passband. (I mean the passband you can set with the "upper- and lower boundaries")
Now it seems there is a standard offset of +1,5KHz (for all USB) or -1,5KHz (for all LSB).
This would only be correct for the [100-3000] passband commonly used to listen to SSB
voice transmissions.
Regards
Jan (PE1OSQ)