Date   

Re: fm Questions

Kriss Kliegle KA1GJU
 

   For practice with tuning and filter on NFM, try tuning the NOAA broadcasts on 162.400 to 162.550 MHz. Start your radio at 1Mhz or just less than that and you can see all the NOAA WX Radio stations. During this shot, they were playing the alert tone due to sever thunderstorm warning for Boston Harbor. Just like DMR transmissions, some of the NOAA TXR's are in sync with each other, evident by the same traces on the waterfall.

73 Kriss KA1GJU



Re: fm Questions

Kriss Kliegle KA1GJU
 

Forgot to answer the other one Bob, NFM is used on 2M and nearby police, fire, ambulance freqs just above in the 150 - 160 MHz.
Here's a pic of 145.230 MHz, the Boston 2M repeater (you can see the DRM signal immediately next door on 145.240 Mhz):

73 Kriss KA1GJU (in the middle of a thunderstorm)


Re: HF Antenna Query

Allan Isaacs
 

Thanks for the advice Dave & Siegfried

I’m quite friendly with my neighbour as we get his (lockdown) groceries via our deliveryman and I’m forever sorting out his computer. The last fix was a new capacitor on his graphics card foc.

 

I’m sure his PLAs do have a filter because it is not quite right (see attached) with a frying noise on all signals (3.5 to 3.75MHz).

My own mains wiring is flooded with his RFI.

The picture shows 80m with the outer ends of the scan cutting off because of the Andrus bandwidth of 400KHz.

Noise-free, the RF level should be -150dBm.

Allan G3PIY

 

 


Re: fm Questions

doug
 



On 7/14/20 8:32 AM, rmrrgs wrote:
Hello,

Just started playing around with fm.
Using a Scantenna ST-2 up in the attic.  (with a RSPdx)

Am i correct that for the normal local fm broadcast stations,
the WFM button is the correct one ?

If so, what typically uses the NFM ?

And, e.g., 90.9 means 90.9MHz ?

Any general fm reception hints ?
Filters, etc. ?

Thanks,
B.
_._,_._,_


WBFM=Wide Band FM--the channel is about 300KHz wide, and provides for excellent music fidelity, and the channel also has room for stereo sound, storecast (elevator music)
and sometimes more. NFM= Narrow Band FM, and is used for communications--police and fire dispatching, VHF amateur radio (which also uses other modes) and some
digital signaling. NFM takes up no more channel width than an equivalent AM transmission, but is more noise resistant.
Yes, 90.9 is MHz--MegaHertz. Millions of cycles per second.
--doug, WA2SAY, retired RF Engineer


Re: fm Questions

Kriss Kliegle KA1GJU
 

You may or may not have a BFM option initially, if it's not visible in the modes window, click on the three dots and add it (red circle on left).
For the RDS (Radio Data System) to work, you need to turn it on, via the "View Tab", "Waterfall Extras", click on "RDS".
RDS is the data that give you station ID, artist, and name of song, among other stuff, just like in a 'modern' automobile.

See attachment!

73 Kriss KA1GJU


Re: SDR Console 3.0.23 stops

Terry W6LEO
 

Tell us what the winning combo was!

de W6leo


Re: Midi #future

Siegfried Jackstien
 

on my midi i have a configuration tool that also can be programmed to have an autorepeat (with setable speed)

i use that to use a "button" (only a single button press) to act as "range" (like the tuning wheel) ...

and also for those functions where an up down setting is done (drive slider, filter edges, etc)

so i have 4 button for the filter edges (lower end up/down and upper end up/down) with a repeat function

drive up down ... mic gain up down ... processor gain up down ... all theres have a repeat function added in the midi control software

with that soft you can set any button to have any function (also a button acting like a turn wheel but then you need two for up down)

so the repeat function ... and also the "mapping" (what button sends what midi note ... repeat, channel number etc.) all is done in the midi config tool ... (that also converts the "hid" commands to midi)

the device when plugged in the pc announces itself in windoze as a hid device (like a keyboard or a mouse) ... and the driver/mappingsoft ... converts that to midi commands (any button can send any note ... with or without repeat)

two buttons left as spare for now ... turn wheel has two speeds (with touch sensor ontop) and the other two speeds are "converted" to buttons that are programmed to also act like a turn wheel (+/- 1kc and +/-10kc)

a few sleepless nights till i got all configured well :-)

hope you find a working solution ... hack an old mouse open and use its rotary encoder is one option

but in the midi commands (of sdr console) that tick box is not needed in my view

what i would like is a MOMENTARY ptt (midi knows note on and note off as two different comands) ... but its a "toggle" switch now

a momentary switch like that what we have on the serial port (ptt on as long as you hold it down) ... that would also be nice to have on midi

greetz sigi dg9bfc

ps ... a "quick look" is not enough to configure midi!! ... its a bit tricky

Am 14.07.2020 um 06:38 schrieb Radioman ZeroZero:

I had a quick look at the midi part of sdr-console last night.
Would it make sense to have a tick box for command repeat? I'm thinking if a controller button is in the down position it could be used to tune, to avoid multiple button clicks.  I think the only way of tuning at the moment is with a rotary encoder which I and many others dont have.
Having said that I'm not sure how tuning speed would be implemented. I guess a fixed repeat rate would be best to start with.
--
Thanks Steve M0ZEH


Re: HF Antenna Query

Siegfried Jackstien
 

a wifi extender instead of a powerline modem would solve that

sometimes even only move the main wifi router a bit left or right ... and/or placing a sheet metal behind it (as reflector to fire more towards tv set) could help

you can filter you own main against low frequency (and higher) noise ... that would lower conducted noise (also good for your own receiver)

but the "radiated" noise from HIS wiring can not be lowered that way ... do not point your antenna to tv set ... use a pump gun (just kidding here!!!)

how high is the noise on the normal ham bands?? does he maybe use a "not allowed to be used" device?? (ham bands should be notched out) ...

a noise generator is not the right way ... but maybe give him a wifi repeater as a "neighbours gift for a good friendship" ... (also could be an old router reconfigured as access point)

maybe on tv and router end the antennas could also be a bit improved (without using wifi "boosters" ... real rf amps ... those are sure forbidden)

you are a ham radio operator so you sure know enough about antennas ... rf reflections from walls etc ... to help your neighbour for a reliable WIFI connection for his tv set ... but i do not know how good (or already very bad) your "friendship" now is ...

good luck to find a solution

greetz sigi dg9bfc


Am 14.07.2020 um 07:59 schrieb Allan Isaacs:

My house must be pretty typical Kriss.

I got rid of a specific bad mains plug power supply and the MF bands quietened considerably but one day we had two power cuts in quick succession causing my neighbours supply to trip out.

As he was away on holiday the trip wasn’t reset.

The whole spectrum suddenly became really quiet especially the 300-400KHz band carrying airport beacons but also 80m which had been noisy.

As soon as the guy returned from holiday the racket came back, wiping out the MF band and producing plateau-like noise across half the 80m band. It turned out to be his Ethernet-over-mains adaptors which he’d installed for his smart TV which was too far from his wireless router. I demonstrated this to him and suggested he stop using them but he didn’t bother. His house is a thatched cottage with thick stone walls and a stone floor making the use of ordinary cable a bit unsightly so I’m stumped.

The mush not only comes from his house, but it pervades my own mains wiring as well.

 

Is it possible I wonder to make a noise generator to stop his Ethernet adaptors from working reliably (like a jammer) and then I could suggest he simply moves his wireless router nearer the TV? Maybe couple the jammer into my mains supply? I could also move one end of my 80m inverted V to a point directly behind his TV and couple up my linear.

 

Allan G3PIY

 

 


Re: fm Questions

Siegfried Jackstien
 

mot wfm but BFM !!! (broadcast fm) ... with stereo and rds decode ...that is what you need for your local radio on 88 to 108 megs

dg9bfc sigi

Am 14.07.2020 um 12:32 schrieb rmrrgs:

Hello,

Just started playing around with fm.
Using a Scantenna ST-2 up in the attic.  (with a RSPdx)

Am i correct that for the normal local fm broadcast stations,
the WFM button is the correct one ?

If so, what typically uses the NFM ?

And, e.g., 90.9 means 90.9MHz ?

Any general fm reception hints ?
Filters, etc. ?

Thanks,
B.


Re: Ettus compatibility #sdrconsolev3 #ettus

Erik. M0MWF
 

If your interest lays with USRPs (as mine does), you'll want a 3rd-gen USRP, such as X3xx, given RFNoC is the direction they are going in. You'll also want the clock module.

And as Ray has said previously, and my testing shows, the UBX series daughterboards seem to be by far, the best.

If I didn't mind a divorce, it would be an N320 for me. Seems to be an 'all in one' box, 2x2 MIMO, 3MHz to 6GHz, 200MHz bandwidth / 250MS/s, QSPF+ port, stand-alone operation, built-in GPSDO. Though I've no idea on the NF or anything in real life, as I've not used one yet. But it is in my 'sights' though...

UHD under windows is a PIA in my opinion. Needlessly complicated, and Ettus should sort this out. Though we are not the intended end-user in their eyes, they might say..

HTHs.


Re: HF Antenna Query

D R
 

Hi Allan,

Your neighbour could try using a WiFi extender instead of those infernal ethernet over mains adapters.  You can even buy mains socket faceplates with the extender built in - they are quite cheap, but work very well, as I can testify from using one to cure the poor signal in an upstairs room.

Buy one as a present and offer to fit it for him - it may be the easier way to sort out your problem :)

Regards,
Dave


Re: Ettus compatibility #sdrconsolev3 #ettus

Erik. M0MWF
 

Actually, my B210 on USB3 streams more bandwidth than my N200 on GigE.

My B210 comfortably runs at 28MHz bandwidth (56MHz viewable, but unusable audio), and is also 'snappier' to use over USB, compared with the ethernet-connected USRPs. Runs 32MHz on HDSDR via EXTIO easily too.

My N200 gives 20MHz OK, some drop-outs at 25MHz, and is a similar story for the X310 over GigE.

My X310 over 10GE, can comfortably show 40MHz bandwidth, on a single 10GE interface (remember it has two), drawing a continuous ~1.3Gb/s on the NIC without issue. I don't have any 120MHz-wide daughtherboards to play with yet, as I'm waiting for more 'covid cast-offs' from Fleabay to try that.


fm Questions

rmrrgs <rgsrose@...>
 

Hello,

Just started playing around with fm.
Using a Scantenna ST-2 up in the attic.  (with a RSPdx)

Am i correct that for the normal local fm broadcast stations,
the WFM button is the correct one ?

If so, what typically uses the NFM ?

And, e.g., 90.9 means 90.9MHz ?

Any general fm reception hints ?
Filters, etc. ?

Thanks,
B.


Re: HF Antenna Query

Stu C <stu@...>
 

OK an alternative viewpoint - use the noise.

my experience over the last --too long--.
(settling on LZ1AQ loops mainly)

1. All copper is an antenna, reduce copper or make it hard for RF to get in/out (ferrite or shielding, rarely both). Spot long copper runs anywhere and break them up with ferrite or reduce them if possible. If you can’t remove / break it then know it will have common mode RF on it – give that a short route to ground or some way to dissipate that energy.

2. Replace Ethernet with Fibre, it is price comparable now and provides a more relaxed feeling during electrical storms.

3. Use Magnetic antennas close to the ground but as far from buildings as you can.

4. Create a really good ground reference (see next).

5. Pass at least one antenna feed up some buried copper tube, use the same tube for grounding.

6. Water your ground or create some method for avoiding it drying out….

7. Build a physically solid and symmetrical loop for the LZ1AQ antenna (important for nulls).

8. Use WSPR to record antenna performance, test over time (with noise plots if you can).

9. Consider the copper around you as an antenna, identify where in the “house antenna” your SDR lies, can you move it? E.G. run a single extension mains cable from another point on the feed/house see if that helps. If you are suffering at one particular frequency make sure your SDR is not at one impedance inversion at that frequency, from the RF earth.

10. build a mains filter from decent (not cheap Chinese type) commercial filter and large ferrites (search M0NWK)

 

Get your own RX into top shape before going at the neighbours, why? Because you can use the "broadband noise source known as neighbours" to fine tune your immunity then once you help them you have a noise floor that would have been hard to profile and work on without noise..

 

See my WSPR results on KB9AMG’s site (M0AQY) then consider the footprint of my three HF antennas is 6ftx4ft (Max 6ft high) furthest point 30ft from noisy terraced houses. It’s working OK considering.
I  have never managed to work on the noise sources but I can tolerate a lot more now.


Re: DIY Arduino Midi Controller for SDRC completed

jdow
 

As a side note, with both networking and USB there is enough overhead messages that are oh 20 bytes cost little more than messages two or three bytes long in terms of the medium's traffic capacity. (Very) mild verbosity can sometimes help development by being somewhat human readable - e.g. BCD rather than binary.

{^_^}

On 20200714 03:55:13, Andrea Dalbagno wrote:
...and...  would be a great thing if keyboard and MIDI libraries would work togheter ;-)
Tchuss
Andrea
Il mar 14 lug 2020, 12:53 Andrea Dalbagno via groups.io <http://groups.io> <andrea.dalbagno@... <mailto:gmail.com@groups.io>> ha scritto:
Great hint! Will gove a try this evening.
BRG
Andrea
Il mar 14 lug 2020, 08:44 DL2EBV <dl2ebv@... <mailto:dl2ebv@...>> ha
scritto:
Hello Andrea,
you can try the following code-example:
|#include <Keyboard.h> void setup() { // make pin 2 an input and turn on
the // pullup resistor so it goes high unless // connected to ground:
pinMode(2, INPUT_PULLUP); // initialize control over the keyboard:
Keyboard.begin(); } void loop() { while (digitalRead(2) == HIGH) { // do
nothing until pin 2 goes low delay(500); } delay(1000);
Keyboard.press(KEY_RIGHT_ALT); |||Keyboard.press(KEY_RIGHT_SHIFT); | Keyboard.press('+'); delay(100);
Keyboard.releaseAll(); delay(1000); }|


Re: DIY Arduino Midi Controller for SDRC completed

Andrea Dalbagno
 

...and...  would be a great thing if keyboard and MIDI libraries would work togheter ;-)

Tchuss

Andrea

Il mar 14 lug 2020, 12:53 Andrea Dalbagno via groups.io <andrea.dalbagno=gmail.com@groups.io> ha scritto:
Great hint! Will gove a try this evening.
BRG

Andrea

Il mar 14 lug 2020, 08:44 DL2EBV <dl2ebv@...> ha scritto:

Hello Andrea,
you can try the following code-example:

#include <Keyboard.h>

void setup() {
  // make pin 2 an input and turn on the
  // pullup resistor so it goes high unless
  // connected to ground:
  pinMode(2, INPUT_PULLUP);
  // initialize control over the keyboard:
  Keyboard.begin();
}

void loop() {
  while (digitalRead(2) == HIGH) {
    // do nothing until pin 2 goes low
    delay(500);
  }
  delay(1000);
  Keyboard.press(KEY_RIGHT_ALT);
  Keyboard.press(KEY_RIGHT_SHIFT);
 Keyboard.press('+'); delay(100); Keyboard.releaseAll(); delay(1000); }

 


Re: DIY Arduino Midi Controller for SDRC completed

Andrea Dalbagno
 

Great hint! Will gove a try this evening.
BRG

Andrea

Il mar 14 lug 2020, 08:44 DL2EBV <dl2ebv@...> ha scritto:

Hello Andrea,
you can try the following code-example:

#include <Keyboard.h>

void setup() {
  // make pin 2 an input and turn on the
  // pullup resistor so it goes high unless
  // connected to ground:
  pinMode(2, INPUT_PULLUP);
  // initialize control over the keyboard:
  Keyboard.begin();
}

void loop() {
  while (digitalRead(2) == HIGH) {
    // do nothing until pin 2 goes low
    delay(500);
  }
  delay(1000);
  Keyboard.press(KEY_RIGHT_ALT);
  Keyboard.press(KEY_RIGHT_SHIFT);
 Keyboard.press('+'); delay(100); Keyboard.releaseAll(); delay(1000); }

 


Re: DIY Arduino Midi Controller for SDRC completed

Andrea Dalbagno
 

Hallo Ernst
I'm far away from my PC, but if I rememeber right there is a shortcut assign list somewhere in SDRC. This evening I'll give you some more infos.
Though the combination should works without any other procedure...
BRG

Andrea

Il mar 14 lug 2020, 08:29 DL2EBV <dl2ebv@...> ha scritto:

Hello Andrea,
I am not so familiar with SDR-Console.
You wrote about zooming with the shortcut AltGr+Shift++/-.

I just tried this with the real keyboard and nothing happens.
Have I to configure something before?

Is there a list of possible shortcuts?

I didn´t find information on shortcuts with SDR-Console.

Ernst


Re: HF Antenna Query

jdow
 

Ah, yes, a bribe may help. And some household chokes at your home MAY do some good. On his home they might make his network more reliable for him. But, they are expensive. Always give him suggestions that will improve his situation, if you can.

Another thing to consider is whether or not he has DSL. If he has DSL common mode chokes on his telephone line might provide better balance and a significant improvement, both for you and for him.

Apply honey liberally. It develops friendships and solves social level problems. (Note to self - you REALLY gotta remember this more than you do, Joanne.)

{o.o}

On 20200714 03:07:07, Michael.2E0IHW via groups.io wrote:
Maybe suggest  a wifi extender, or  a mesh wifi system for his TV maybe as a gift ???
Chokes on your own mains wiring might also  help.
But stay supportive - and legal.
Michael
On 14/07/2020 08:59, Allan Isaacs wrote:

...  It turned out to be his Ethernet-over-mains adaptors which he’d installed for his smart TV which was too far from his wireless router. I demonstrated this to him and suggested he stop using them but he didn’t bother. His house is a thatched cottage with thick stone walls and a stone floor making the use of ordinary cable a bit unsightly so I’m stumped.

The mush not only comes from his house, but it pervades my own mains wiring as well. >
...I could suggest  he simply moves his wireless router nearer the TV?
Allan G3PIY


Re: HF Antenna Query

Michael.2E0IHW
 

Maybe suggest a wifi extender, or a mesh wifi system for his TV maybe as a gift ???

Chokes on your own mains wiring might also help.

But stay supportive - and legal.

Michael

On 14/07/2020 08:59, Allan Isaacs wrote:

... It turned out to be his Ethernet-over-mains adaptors which he’d installed for his smart TV which was too far from his wireless router. I demonstrated this to him and suggested he stop using them but he didn’t bother. His house is a thatched cottage with thick stone walls and a stone floor making the use of ordinary cable a bit unsightly so I’m stumped.
The mush not only comes from his house, but it pervades my own mains wiring as well. >
...I could suggest he simply moves his wireless router nearer the TV? Allan G3PIY

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