Re: ADE25MH Mixer - warning
#tinysa
Hi Gary - In my version I added a 3dB attenuator pad between the mixer and the 434MHz filters so the mixer does not see a huge mismatch (only roughly 2:1) for frequencies other than 434MHz.? This is
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m0wid
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#859
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Re: New tinySA.exe problem
Is the averaging set to off? Please send a screenshot -- HBTE Files section: /g/HBTE/files Erik, PD0EK
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Erik Kaashoek
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#858
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New tinySA.exe problem
If I start up tinySA.exe, input a 10MHz signal and do a scan, it works fine. If I just change the input to say 11MHz, and do a scan, it shows a lower level 10MHz signal but no 11MHz at all. If I
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wb6ogd
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#857
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Re: New tinySA.exe uploaded
Jerry, I just tried to speed up my CH340G. In DeviceManager, it can only go to 128000 (driver limitation?). Tried to put that in the Arduino but it can only set normal baud rates, 115200 is therefore
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wb6ogd
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#856
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Re: New tinySA.exe uploaded
The bit-banged SPI interface could also be a factor in the max achievable sample rate if the UART baud rate were increased up from 115.2kbaud. Using hardware SPI pins, the Si4432 could be run at up to
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Jerry Gaffke
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#855
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Re: New tinySA.exe uploaded
A few corrections: The CH340G datasheet states: " CH340 supports common baud rate: 50,75,100,110,134.5,150,300,600,900,1200,1800,2400,3600,4800,9600,14400,19200,28800, 33600,38400,
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Jerry Gaffke
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#854
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Re: New tinySA.exe uploaded
Some Arduino boards have a processor chip that integrates a USB interface. Sending data with the Serial command would not involve any UART at all, could be relatively fast. The UART on the Nano can go
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Jerry Gaffke
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#853
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Re: New tinySA.exe uploaded
Arduino's vary, I have no idea what they all do with regard to the UART link.. But let's assume the Nano, which is probably the least capable of what folks here are using. The Nano's ATMega382P chip
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Jerry Gaffke
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#852
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Re: tinySA Mixer Sub
#tinysa
Officially rated till 500MHz so just as the ADE-1 I expect it will perform fine. -- HBTE Files section: /g/HBTE/files Erik, PD0EK
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Erik Kaashoek
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#851
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Re: 3.3V compatible Arduino boards
#tinysa
Daniel and Dan, I am using cheap 5V Arduino Nano V3? (ATmega328P) (about $3.50) with 4 channel FET level converter ($1). Works fine with the BUFFERSIZE fix. Erik is using Arduino Zero (3v). I am not
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wb6ogd
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#850
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tinySA Mixer Sub
#tinysa
Erik, I have some brand new mini circuits TFM-2+ mixers, actually a tube on 18 of them. I will upload a data sheet to your folder. I believe this is a military spec version of the SBL-1 if I remember
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Dan Reynolds <on30ng@...>
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#849
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Re: 3.3V compatible Arduino boards
#tinysa
Hi colleagues, I have two questions. Can?I use Arduino Uno or Mega2560 with level converters? In a parallel stage wouldn't it be appropriate for the Nextion Enhanced NX8048K050? It's not cheap but it
By
[email protected] [email protected]
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#848
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Re: SI4432 Module Modifications
#tinysa
FB Gary. I hated being alone - Ha, ha! I'm assuming a Arduino Zero clone would work just fine. I'm pretty sure I have some somewhere (anybody else have that problem). I also have some mixers I'm going
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Dan Reynolds <on30ng@...>
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#847
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Modifying the LO SI4432 for the extended frequency range of the tinySA
#tinysa
If you want the tinySA to measure above 150MHz you have to modify the LO SI4432 and remove all the low pass and trap filters. As there are many different schematics used for the SI4432 module I can
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Erik Kaashoek
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#846
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Re: ADE25MH Mixer - warning
#tinysa
No issue. Its intended to ne for matching. Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ Owner - Operator Big Signal Ranch ¨C K9ZC Staunton, Illinois Owner ¨C Operator
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K9HZ
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#845
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Re: ADE25MH Mixer - warning
#tinysa
My ADE25 module has locations for caps on the inputs and outputs but they are stuffed with 0 ohm resistors.. It seems to work ok, should I be worried?? Should I put in caps? What value. It also has
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wb6ogd
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#844
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Re: New tinySA.exe uploaded
The reason is speed if you are using CDC over USB USB CDC transfers have substantial overhead so the more bytes you send in one send the faster -- HBTE Files section: /g/HBTE/files
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Erik Kaashoek
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#843
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Re: TinySA and phase noise. Understanding the limitations of the SI4432
#spectrum_analyzer
The different is most probably a ground loop, what you saw was the difference between very loose and manually tightened -- HBTE Files section: /g/HBTE/files Erik, PD0EK
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Erik Kaashoek
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#842
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Re: New tinySA.exe uploaded
I'm not sure what the output buffer does for us other than waste RAM. Why not send each binary byte on its way individually with Serial.write()? ? Serial.write() is blocking. If there is no room for
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Jerry Gaffke
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#841
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Re: TinySA and phase noise. Understanding the limitations of the SI4432
#spectrum_analyzer
Nice, awesome example details to get the general idea. Thinking torque wrench will be a good idea to invest in, adding that to the list for next month (I guess I can use a scale to a wrench). I just
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jafinch78 .
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#840
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