Date   

Re: Weird "signal diagnostics" readings

Kenneth Sejkora
 

I can attest to this 'phenomenon'.  I use an RTL-SDR V3 dongle with SDRSharp in direct sampling mode to listen to 20-meters and other frequencies in the HF band.  I live between Boston and Providence, so there are plenty of AM transmitters in the vicinity.  After about 18:00 local time, and up until about 07:00 local, the spectrum displays some minor phantom signals about every 60 kHz apart.  However, during daylight hours, there are strong signals every 10.0 kHz apart on exactly 10-kHz multiples... 14,100.0, 14,110.0, 14,120,0, etc., several of which exhibit audible audio intermodulation with bandwidths up to 4 khz wide, like listening to a AM broadcast..  Same thing if I drop down to 75-meters... 3,800.0, 3810.0, 3820.0, etc.  No, I do not have any kind of AM broadcast high-pass or band-stop filter installed.  But once it starts getting dark, somewhere between about 17:30 and 18:30 local, those 10.0-kHz interval signals disappear.  I suspect it's a combination of both higher daytime power and different antenna patterns, as almost all of the AM broadcasters in the area exercise both practices of diurnal/nocturnal power and antenna patterns changes.

I did consider the possibility of temperature-related phenomena, such as joints/junctions in wires, fences, rain gutters, etc. being heated up by the sun and forming a pseudo-diode junction that radiated RF, but with recent single-digit daytime temps, the pattern looks the same as it does on warmer days.

Of course, your mileage may vary depending on the number of AM BCB stations, transmit power, frequencies, antenna patterns, etc. in your local vicinity.  I've been considering buying and trying an AM band-stop filter to see if it helps.  I'd welcome any experiences, successes, or failures anyone has had with such band-stop filters.

Good luck!

Ken, WBØOCV Norton, MA USA
41.959546N, 71.163996W  FN41kx


On Wednesday, January 23, 2019, 08:05:28 AM EST, jdow <jdow@...> wrote:


Dumb question - what time of day was this and what time of day do you usually
use it? At least in the states most broadcast stations run with different day
and night power and antenna patterns. And noise and signals do show a daily
pattern even on LF, at least around here in the past.

{o.o}



Multiple SDR# instances running concurrently

EB4APL
 

Hi,

I currently run several instances of SDR# and I have multiple copies of
the program folder which only differs in the configuration files, which
are tailored for different receivers.

While I think that I did my homework, I didn't found a trick for using
different profiles and only a program folder, such the one used with
Spyserver. While I tried the same schema, it did not work. Is it
possible to do it now or maybe something planned for the future?. This
way updating the program only in one folder is much better than doing it
in more than my current 12 copies.

Best regards,

Ignacio, EB4APL


---
El software de antivirus Avast ha analizado este correo electrónico en busca de virus.
https://www.avast.com/antivirus


Re: Weird "signal diagnostics" readings

Patrick
 

Hi !

Thanks for the replies and comments.

<< In any case, you can trust what the signal diagnostics plugin says it's not "just for display >>
That's the reason why I was so surprised with the reading ! I know this tool is very reliable and I often use it.

<< Lower ambient noise? Some neighbor is on vacation or changed his noisy TV? >>
RSPduo / SDRuno should have also shown lower values in such a case, but they were the usual ones, as specified in my first post (signal strength for this beacon has been the same, within a dB, for 3 years, using this antenna !)

<< IF noise reduction or another plugin is enabled? >>
Same parameters / settings I always use. Of course, I checked the HF AGC, HF ATT all was OK.
The weird thing is that the values got back to normal progressively after about 1h, for undetermined reason, without modifying a single parameter.

<< what time of day was this and what time of day do you usually use it? At least in the states most broadcast stations run with different day  and night power and antenna patterns >>
It was in the evening, as usual. This LF beacon is about 20 km from home and it strength level is very stable. That's why I use it to ensule my setup is OK (or to compare antennas for example).

<< And noise and signals do show a daily  pattern even on LF>>
As stated above, this would not explain why the SDRuno / RSPduo combo was showing the very usual values (same antenna, same cable, etc)

Nothing too bad of course, but quite surprising (never noticed this before).
I will run another test when the snowfalls stop. If it occurs again, I have to think about running SDR Console to see if it also shows unsual numbers, even if not as accurate as the "signal diagnostics" tool.

Pat




Le mer. 23 janv. 2019 à 12:48, prog <info@...> a écrit :
On Wed, Jan 23, 2019 at 12:46 PM, Patrick wrote:
Is there an explanation to this ?
Lower ambient noise? Some neighbor is on vacation or changed his noisy TV? IF noise reduction or another plugin is enabled?
In any case, you can trust what the signal diagnostics plugin says it's not "just for display".


Re: Weird "signal diagnostics" readings

jdow
 

Dumb question - what time of day was this and what time of day do you usually use it? At least in the states most broadcast stations run with different day and night power and antenna patterns. And noise and signals do show a daily pattern even on LF, at least around here in the past.

{o.o}

On 20190123 02:26:53, Patrick wrote:
Hi there !
Yesterday, just after my HF+  was connected to the desktop, I tuned to my local LF beacon (received via ground wave) to ensure everything was OK using the 'signal diagnostics' feature. I immediatly noticed both the beacon strength and noise level were about 15 dB lower than usual.
I double-checked the cables, connectors, software settings, stopped SDR#, relaunched it, disconnected the HF+, etc,nothing abnormal found.
Then, I connected my second SDR (RSPduo), and surprisingly SDRuno software showed the usual readings, for both the local NDB and the noise floor.
Back to the HF+ / SDR# : still about -15 dB lower numbers
After about, say 30 minutes, new try : the discrepancy was then only about -8 / -10 dB, and after about 1h the readings were exactly the ones I usually have ...
No such phenomenon a few days before : the values were immediatly OK, within a dB (as expected I guess).
Is there an explanation to this ?
Thanks !
Pat


Re: Weird "signal diagnostics" readings

prog
 

On Wed, Jan 23, 2019 at 12:46 PM, Patrick wrote:
Is there an explanation to this ?
Lower ambient noise? Some neighbor is on vacation or changed his noisy TV? IF noise reduction or another plugin is enabled?
In any case, you can trust what the signal diagnostics plugin says it's not "just for display".


Weird "signal diagnostics" readings

Patrick
 

Hi there !

Yesterday, just after my HF+  was connected to the desktop, I tuned to my local LF beacon (received via ground wave) to ensure everything was OK using the 'signal diagnostics' feature. I immediatly noticed both the beacon strength and noise level were about 15 dB lower than usual.

I double-checked the cables, connectors, software settings, stopped SDR#, relaunched it, disconnected the HF+, etc, nothing abnormal found.

Then, I connected my second SDR (RSPduo), and surprisingly SDRuno software showed the usual readings, for both the local NDB and the noise floor.

Back to the HF+ / SDR# : still about -15 dB lower numbers

After about, say 30 minutes, new try : the discrepancy was then only about -8 / -10 dB, and after about 1h the readings were exactly the ones I usually have ...

No such phenomenon a few days before : the values were immediatly OK, within a dB (as expected I guess).

Is there an explanation to this ?
Thanks !

Pat


Re: Multiple SpyServer instances running concurrently with SDR#

prog
 

On Tue, Jan 22, 2019 at 09:34 PM, Ben Z en de rest wrote:
"Do your homework" ? 
https://airspy.groups.io/g/main/message/29998


Spyserver: Could not acquire the device

Ruben Navarro Huedo (EA5BZ)
 

Hello friends:
I was running fine spyserver with rtl-sdr on my rasp but i had a problem with the SD and i had to reinstall raspbian.
In this new setup rtlsdr is running ok with Satnogs and with rtl_test but not with spyserver.
What do you think?
Thank's a lot..

---------------
Have a look:

pi@Raspi:~ $ rtl_test
Found 1 device(s):
  0:  Realtek, RTL2838UHIDIR, SN: 00000001

Using device 0: Generic RTL2832U OEM
Found Rafael Micro R820T tuner
Supported gain values (29): 0.0 0.9 1.4 2.7 3.7 7.7 8.7 12.5 14.4 15.7 16.6 19.7 20.7 22.9 25.4 28.0 29.7 32.8 33.8 36.4 37.2 38.6 40.2 42.1 43.4 43.9 44.5 48.0 49.6
[R82XX] PLL not locked!
Sampling at 2048000 S/s.

Info: This tool will continuously read from the device, and report if
samples get lost. If you observe no further output, everything is fine.

Reading samples in async mode...
^CSignal caught, exiting!

User cancel, exiting...
Samples per million lost (minimum): 0
pi@Raspi:~ $ cd spyserver/
pi@Raspi:~/spyserver $ ./spyserver
SPY Server v2.0.1700
Copyright (C) 2016-2018 Youssef Touil - https://airspy.com
Reading the configuration file: spyserver.config
Listening for connections on 0.0.0.0:8089
Accepted client 192.168.1.100:54729 running SDR# v1.0.0.1700 on Microsoft Windows NT 6.2.9200.0
Device was sleeping. Wake up!
Could not acquire the device

Spyserver config:

# SPY Server Configuration File

# TCP Listener
#
bind_host = 0.0.0.0
bind_port = 8089-8089

# List Server in Airspy Directory
#
list_in_directory = 1

# Owner Name
# For example: John Doe L8ZEE
owner_name = Ruben Navarro EA5BZ

# Owner email
# For example: john@...
owner_email = runahue@...

# Antenna
# For example: Random Wire/Magnetic Loop/Mini-Whip/Inverted V/etc.
antenna_type = VHF QFH

# Antenna Location
# For example: 48.858332, 2.294560
antenna_location = 38.2768, -0.6711

# General Description
#
general_description = RTL-SDR and VHF QFH. Online when Satnogs Ground Station is not receiving. Enjoy it !

# User sessions
#
maximum_clients = 4

# Maximum session duration
# In minutes. 0 for no limit
#
maximum_session_duration = 30

# Allow clients to retune and change of gain of the device
#
allow_control = 1

# Device Type
# Possible Values:
#   AirspyOne (R0, R2, Mini)
#   AirspyHF+
#   RTL-SDR
#   Auto      (Scans for the first available device)
#
device_type = RTL-SDR

# Device Serial Number as 64bit Hex
# For example: 0xDD52D95C904534AD
# A value of 0 will acquire the first available device.
#
device_serial = 0

# Device Sample Rate
# Possible Values:
#   Airspy R0, R2 : 10000000 or 2500000
#   Airspy Mini   :  6000000 or 3000000
#   Airspy HF+    :   768000
#   RTL-SDR       :   500000 to 3200000
# Comment to use the device's default
#
#device_sample_rate = 2500000

# Force 8bit Compression Mode
# The 8bit Compression mode has proven sufficiently good for most streaming use cases.
# Use it to same some internet bandwidth.
#
#force_8bit = 1

# Maximum Bandwidth
# Limits the maximum IQ bandwidth the clients can set
# Recommended value for WFM is 200000
# Recommended value for narrow band modes is 15000
#
#maximum_bandwidth = 15000

# FFT Frames Per Second
#
fft_fps = 15

# FFT Bins
# Bins = 2^fft_bin_bits
#
fft_bin_bits = 16

# Initial Center Frequency
#
#initial_frequency = 7100000

# Minimum Tunable Frequency
# Comment if using the device default
#
#minimum_frequency = 0

# Maximum Tunable Frequency
# Comment if using the device default
#
#maximum_frequency = 35000000

# Frequency Correction in PPB
#
#frequency_correction_ppb = 0

# Initial Gain
#
#initial_gain = 5

# RTL-SDR Sampling mode
# Quadrature = 0,
# Direct Sampling I Branch = 1
# Direct Sampling Q Branch = 2
#rtl_sampling_mode = 0

# Converter Offset
# Set to -120000000 to enable the SpyVerter offset
#converter_offset = -120000000

# Bias-Tee
# For AirspyOne only - Useful for LNA's and SpyVerter
#enable_bias_tee = 0

# Buffer Size (in milliseconds)
#
buffer_size_ms = 50

# Buffer Count
#
buffer_count = 10


Re: Multiple SpyServer instances running concurrently with SDR#

Ben Z en de rest
 

Hi Youssef, thanks for your reply.

Please be kind. I do like your software a lot, however, "Do your homework" ? 

I did read and follow all instructions, even the one for the recommended method to run multibple instances with multiple configs. I talked about rtl-sdr in my message, thought it was clear that I try to run it with 2 rtl-sdr dongles which have been given  a serial number wih rtl_eeprom but that does not seem to be useful in the spyserver.config because of the fact that the serial numbers seems to need to be a hexadecimal number which only appears to be possible when using Airspy receivers. I have 4 different Airspy units in use but not free for this purpose. They all have a daily duty for recording, playing server, creating heatmap and tracking amateur satellites. 

So, I try to run 2 instances of Spyserver, with 2 different config files, from one folder, with 2 rtl sdr dongles. Still the Spyserver only claims an rtl sdr dongle when a remote receiver connects, making it impossible to make shure that the receiver does get connected to the right rtl-sdr dongle. One is setup with a converter and is connected to that converter, however, the Spyserver could find the rld-sdr dongle which is connected to a normal 430 MHz antenna and serve that with the converter settings, showing a wrong frequency and not giving the stations one wants to receive.

Hope you can help me to solve this problem,
Kind regards,
Ben - PE2BZ 

Op di 22 jan. 2019 om 16:05 schreef prog <info@...>:

[Edited Message Follows]

On Tue, Jan 22, 2019 at 03:51 PM, <hoofdeigenwijs@...> wrote:

I am running 2 instances of the server from 2 different folders does not help. I tried that and I think the problem is that the Spyserver only claims the USB device if someone connect to it. I can run the spyserver, no clients connected, than I can start SDRSharp which runs the rtl-sdr which I did want to "assign" to the server and then when a client connects Spyserver says it cannot clame the usb device. 

I try to setup one Spyserver with converter, 13 cm down to 1492 MHz which works quite nice, but if the "other spyserver" tuned to 436 MHz gets the dongle which is connected to the downconverter the rx is unusable.

I have 2 dongles with different serial number, is there a chance that either Spyserver claims the dongle right after the start and stays connected to that dongle so that I can start the 2 spyserver instances in order ?

Thanks,

Ben

Dongle is a very board term nowadays. What dongle? Are you sure your serial number is an actual serial number and not an index? Why do you run the server in multiple folders? Are you aware of the recommended method used to run multiple instances of the server with multiple configs?

I am exposing two HF+ devices from home using two instances of SpyServer with specific configurations residing in the same folder and they do not "steal" the devices from each other.

If you read carefully the old discussions in this mailing list, you will probably get all the answers. Do your homework.


Re: Multiple SpyServer instances running concurrently with SDR#

prog
 
Edited

On Tue, Jan 22, 2019 at 03:51 PM, <hoofdeigenwijs@...> wrote:

I am running 2 instances of the server from 2 different folders does not help. I tried that and I think the problem is that the Spyserver only claims the USB device if someone connect to it. I can run the spyserver, no clients connected, than I can start SDRSharp which runs the rtl-sdr which I did want to "assign" to the server and then when a client connects Spyserver says it cannot clame the usb device. 

I try to setup one Spyserver with converter, 13 cm down to 1492 MHz which works quite nice, but if the "other spyserver" tuned to 436 MHz gets the dongle which is connected to the downconverter the rx is unusable.

I have 2 dongles with different serial number, is there a chance that either Spyserver claims the dongle right after the start and stays connected to that dongle so that I can start the 2 spyserver instances in order ?

Thanks,

Ben

Dongle is a very board term nowadays. What dongle? Are you sure your serial number is an actual serial number and not an index? Why do you run the server in multiple folders? Are you aware of the recommended method used to run multiple instances of the server with multiple configs?

I am exposing two HF+ devices from home using two instances of SpyServer with specific configurations residing in the same folder and they do not "steal" the devices from each other.

If you read carefully the old discussions in this mailing list, you will probably get all the answers. Do your homework.


Multiple SpyServer instances running concurrently with SDR#

Ben Z en de rest
 

I am running 2 instances of the server from 2 different folders does not help. I tried that and I think the problem is that the Spyserver only claims the USB device if someone connect to it. I can run the spyserver, no clients connected, than I can start SDRSharp which runs the rtl-sdr which I did want to "assign" to the server and then when a client connects Spyserver says it cannot clame the usb device. 

I try to setup one Spyserver with converter, 13 cm down to 1492 MHz which works quite nice, but if the "other spyserver" tuned to 436 MHz gets the dongle which is connected to the downconverter the rx is unusable.

I have 2 dongles with different serial number, is there a chance that either Spyserver claims the dongle right after the start and stays connected to that dongle so that I can start the 2 spyserver instances in order ?

Thanks,

Ben


Re: #spyserver no populating maps #spyserver

andrea ottaviani
 

You're always right. I do not know why, I first put the points for the coordinates.
now I find the commas.
I put the points back and see me on the map! ok !!!
Is it normal that I do not see what users type, that is, change frequency and reception modes?

Thank U Prog!
best 73 de IK0MMI
andrea



Re: Power value recording on RPI

prog
 

On Sun, Jan 20, 2019 at 09:53 PM, jdow wrote:
I'm not sure but I suspect the answer is "drag out a compiler and start coding."

Check the Github repository for code examples. Do your homework.


Re: #spyserver Question about a friends spy server settings. #spyserver

prog
 

On Sun, Jan 20, 2019 at 09:53 PM, Glen Ellenbart wrote:
My friends spy server that I like to log on to His SSB bandwidth filter wont go  wider than  5,859,  His spectrum bandwidth is 2400 at the most mhz so does anyone know what adjustments he needs to make so That I can use wider filter bandwidth on USB? Id like to go 10khz  wide or more, is this possible??

For data modes, use the RAW format. Use the search bar in this mailing list for the discussion.


Re: #spyserver no populating maps #spyserver

prog
 

On Sun, Jan 20, 2019 at 09:54 PM, andrea ottaviani wrote:
My server on Orange in on-line and green. But I'don't se me on map.
Did you set the antenna location? Is it in the right format? If in doubt, keep the field empty and it ?ill be deduced from your IP.


#spyserver no populating maps #spyserver

andrea ottaviani
 

Hello. My server on Orange in on-line and green. But I'don't se me on map.
Any suggestion?
Thanks
best 73 de IK0MMI
andrea
IP: 79.40.195.122


Re: Power value recording on RPI

Alan G4ZFQ
 

I have the equipment to calibrate the mini and the antenna I will use. I will be able to match the relative power readings from SDR# to that of an actual spectrum analyzer. I would still like to know how I can collect the power readings without having to mouse over the value and record it by hand.
Some SDR software can do this. I do not know if SDR# can.
A good alternative is to feed the audio to Spectrum Laboratory, or similar.
That can be set to record amplitude, as a text file or it will draw a chart.

73 Alan G4ZFQ


Re: Power value recording on RPI

jdow
 

I'm not sure but I suspect the answer is "drag out a compiler and start coding."
{o.o}

On 20190119 17:12:52, lk2gn@virginia.edu wrote:
Hi,
Thanks for the reply.
I have the equipment to calibrate the mini and the antenna I will use. I will be able to match the relative power readings from SDR# to that of an actual spectrum analyzer. I would still like to know how I can collect the power readings without having to mouse over the value and record it by hand. An actual spectrum analyzer like those developed by keysight, NI, R&S has the option to export data as a CSV as the frequency graph is literally plotting value pairs. I would like to know if anyone has tried to extract these spectrum data.
Best


#spyserver Question about a friends spy server settings. #spyserver

Glen Ellenbart
 

 My friends spy server that I like to log on to His SSB bandwidth filter wont go  wider than  5,859,  His spectrum bandwidth is 2400 at the most mhz so does anyone know what adjustments he needs to make so That I can use wider filter bandwidth on USB? Id like to go 10khz  wide or more, is this possible??


Re: Power value recording on RPI

lk2gn@...
 

Hi, 
Thanks for the reply.
I have the equipment to calibrate the mini and the antenna I will use. I will be able to match the relative power readings from SDR# to that of an actual spectrum analyzer. I would still like to know how I can collect the power readings without having to mouse over the value and record it by hand. An actual spectrum analyzer like those developed by keysight, NI, R&S has the option to export data as a CSV as the frequency graph is literally plotting value pairs. I would like to know if anyone has tried to extract these spectrum data.
Best

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