Question: Which Version of the RPi 4B do you prefer ?
tnx info
herbert
SAT Controller SDR Nano
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For fast PTT detection the signal TX GND from ACC socket can be connected to CTS input of the USB/serial adapter (because via serial CAT command there will be some delay):
If the SCU-17 sound card interface is used for CAT then there is a small modification of the CT-62 (RS232/CAT) cable required. For this cut the track on PCB between RTS and CTS pins and solder the emitter of a PNP transistor to the RTS pin and the collector to the CTS pin. Connect the base via a 4k7 resistor to TX GND signal of ACC socket:
Remark: The original cable can not be used for this because there is no wire connected to TX GND. It has to be replaced.
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Hi Frank,
thank you for that lovely project
Could you please explain with a few words why you are using two RTL sticks and not just one?
Is that neccessary for the beacon correction only?
I am using almost a GPSDO stabilized LNB.
When can we expect the image for the PI4 ?
73, Mike
DK1ML
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Hello to all,
Question: Does anybody has running the "Drift correction" properly?
Today 2 pcs. of NooElec Nano 3 arrive and this was last idea i have what could be the problem. But no success.
Again: I lock system to Master-beacon. Fine.
Then i tune to CW-beacon in audio window to 1,5KHz.
LNB LO corrects automatily according drift but the tuned signal of CW-beacon is not corrected.
This means it drifts away from 1,5KHz in audio window.
Who has any idea what the problem can be?
73
Volker, DH2VH
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Hi, when can we expect the image for the PI4?
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Due to the low feedback (probably many OMs do not use a Raspberry Pi), I only improved my own system and have not released any new image. Maybe sometime - if there is demand - I will prepare and publish an actual image. BTW: I love my little Raspberry station
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Hi Frank,
I think, that a used Windows Notebook for less than 100 EUR with the SDR-Console is more powerful and cheaper than a 50 EUR Raspberry Pi with touch display that alone will cost around 100 EUR.
That is the reason for the lack of demand for your good software,
73, Mike
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As addition to the publication in the current "AMSAT-DL Journal" i have prepared the image for Raspberry Pi 4:
Download: http://www.satcontrol.de/images
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TNX! Will try today.
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Small hint: The default setting for the master frequency is now 10706 MHz (engineering beacon of Es'hail-2). Since this signal has the opposite polarization, it is not very strong. But it works well. The beacon is the left peak in the receiving spectrum (see screenshot below):
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Just playing with the new version. Although equipped with an aluminum cooler/case, the pi4 gets very hot - the software is not to blame for this, from other experiments i knew it would get hot. I think a fan is mandatory.
The performance is good , quick and the delay compared to the pi3b+ or even an analog rx is small. While i had some problems with crackling and interrupted audio on the p3b+ running the older version, this version for the pi4 runs smooth so far. Thumbs up!
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Many thanks for your response. I use the case below with passive cooling (no fan). It runs 24/7 without problems:
https://flirc.tv/more/raspberry-pi-4-case
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Hi was mich nu interesiet ist unterstüzt die Software auch ein FT-897 ???
ich meine die Fernsteuerung des TRX
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Wenn das nicht geht war das mal wieder ein teurer versuch
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Dan schreib ich ebend hier
Wo bekomme ich den das tool her (satcontroler) und gqrx mit den Einstellungen aus der version 2 her
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Wo?
Habe ich noch nicht gefunden
