Search found 8 matches

by rjmura
Mon Aug 12, 2019 2:45 am
Forum: RTL-SDR Discussion
Topic: Newb trying to receive Weather Faxes
Replies: 4
Views: 1569

Re: Newb trying to receive Weather Faxes

what program (e.g., sdr#, sdr console, hdsdr, sdruno) are you using for your radio? for step 1, when you run your sdr radio, look for a configuration menu (like a gear) that shows "quadrature sampling". if you click on the drop-down box, you should see something like "q branch". step 2 is the noaa w...
by rjmura
Sun Aug 11, 2019 3:24 am
Forum: RTL-SDR Discussion
Topic: Newb trying to receive Weather Faxes
Replies: 4
Views: 1569

Re: Newb trying to receive Weather Faxes

i don't have a mac, but you may be able to figure out how to do it by seeing how i do it on a pc. 1. you can tune your sdr below 28 MHz by direct sampling the Q branch. on sdr sharp, this means changing the sampling mode from quadrature sampling in the configure source menu. 2. go to https://www.nws...
by rjmura
Tue Jul 30, 2019 1:27 am
Forum: RTL-SDR Discussion
Topic: Max Volume
Replies: 14
Views: 3173

Re: Max Volume

you may have inadvertently created a ground loop and induced 60 Hz power into the system. try disconnecting the ground to the shield. i need to crank up the volume all the way in sdr# for a green signal of 75% in wxtoimg. if i lower the volume in sdr#, the level in wxtoimg also drops up to the point...
by rjmura
Wed Jul 24, 2019 11:45 pm
Forum: RTL-SDR Discussion
Topic: Max Volume
Replies: 14
Views: 3173

Re: Max Volume

just reduce the volume in sdr sharp.
by rjmura
Sat Jun 29, 2019 8:15 pm
Forum: Troubleshooting Help
Topic: rtl-sdr lna problem
Replies: 8
Views: 2980

Re: rtl-sdr lna problem

you're right about overloading causing the problem, since i live within a mile or two from am, fm and tv transmitters. am using both am and fm filters, but apparently they are overwhelmed by the strong interference. found that i get best results by using the am and fm filters without an lna, and by ...
by rjmura
Sun Jun 02, 2019 9:24 pm
Forum: Troubleshooting Help
Topic: rtl-sdr lna problem
Replies: 8
Views: 2980

Re: rtl-sdr lna problem

recording of noaa 18 satellite pass with 67 deg max elev was unsuccessful. started off with fm trap to rtl-sdr LNA to rtl-sdr dongle running sdrsharp at 0 rf gain and got nothing but noise. looking at the attachment, the pass starts at the top. the black strip is when i turned off sdr sharp temporar...
by rjmura
Sun Jun 02, 2019 9:31 am
Forum: Troubleshooting Help
Topic: rtl-sdr lna problem
Replies: 8
Views: 2980

Re: rtl-sdr lna problem

managed to get bias_tee_on.bat and bias_tee_off.bat to work by changing -d 0 to -d 1 as suggested by github on mar 2, 2018. must be a windows 10 thing. i'll try to get a satellite picture again tomorrow. may have had the rf gain raised and overloaded. now see that raising the rf gain on the dongle d...
by rjmura
Sun Jun 02, 2019 4:30 am
Forum: Troubleshooting Help
Topic: rtl-sdr lna problem
Replies: 8
Views: 2980

rtl-sdr lna problem

tried to activate bias-t on my new lna using the instructions in the v3 dongle user guide, but when i tried to run bias_tee_on.bat, the cmd screen flashed and nothing happened. tried running bias_tee_on.bat in cmd mode, but got a "usb_open error -12". turned on bias t with hdsdr, but signals aren't ...