Search found 33 matches

by Ben321
Fri Jul 26, 2019 8:07 pm
Forum: Other SDR Devices
Topic: Any good full-duplex SDRs?
Replies: 8
Views: 6749

Any good full-duplex SDRs?

Even HackRF is still only half-duplex (can only transmit or receive at a given time). Hopefuly there is something out there that can both send and receive simultaneously. I'm thinking like for radar experiments, or RFID reader, or something similar. Each HackRF is quite expensive, so buying 2 of the...
by Ben321
Fri Jul 26, 2019 8:02 pm
Forum: User Projects
Topic: re: just into a new (for me) apt
Replies: 8
Views: 4248

Re: re: just into a new (for me) apt

I just moved into a new apt in the sticks of West Richland. I now have a fenced yard with a very, very tall oak tree in it. Also I can now put up outside ham antennas. The only restriction is no permanent mounts, like a tower set in concrete. Anyways I am setting up RTL dongel on my Dell laptop. At...
by Ben321
Fri Jul 26, 2019 7:31 pm
Forum: Troubleshooting Help
Topic: What is this wideband signal at exactly 432MHz?
Replies: 5
Views: 2514

Re: What is this wideband signal at exactly 432MHz?

Where are you from? And it look like Noise for me. I live in Seattle, WA. I thought that maybe since it had a carrier at a very specific frequency (exactly 432MHz), and also is extremely stable (no jitter in the carrier frequency at all), that maybe it was some kind of GPS calibrated transmitter. A...
by Ben321
Fri Jul 26, 2019 9:35 am
Forum: Troubleshooting Help
Topic: What is this wideband signal at exactly 432MHz?
Replies: 5
Views: 2514

What is this wideband signal at exactly 432MHz?

It's a little over 1 MHz wide and appears to use AM as its modulation, and it appears to have either 2 or 3 subcarriers. If 3 subcarriers, they appear to be using FM modulation, with the lower 2 having a wider bandwidth than the highest one. If 2 subcarriers, the lower one appears to be FSK modulate...
by Ben321
Fri Jul 26, 2019 6:07 am
Forum: User Projects
Topic: I need some advice in creating IQ processing software
Replies: 6
Views: 4610

I need some advice in creating IQ processing software

I'm trying to create software that can process the live IQ stream from an RTL SDR receiver. Problem is, these stream data at a rate of 2.4 MILLION samples per second. That's VERY fast. In fact, it's 50 times the speed of a normal sound card with a SR of 48000 smp/sec. This means every imaginable opt...
by Ben321
Sat Feb 16, 2019 6:27 am
Forum: Other SDR Devices
Topic: Check out the specs on THESE receivers!
Replies: 2
Views: 6487

Check out the specs on THESE receivers!

I don't know how much is software controlled, versus controlled from the front panels of the devices, but the specs are BEYOND AWESOME! https://www.rohde-schwarz.com/us/products/aerospace-defense-security/receivers/pg_overview_63723.html They have a handheld receiver that goes from 9kHz to 7.5GHz. T...
by Ben321
Fri Feb 15, 2019 1:30 am
Forum: User Projects
Topic: How exactly are the IQ channels supposed to be calculated/processed?
Replies: 2
Views: 7684

How exactly are the IQ channels supposed to be calculated/processed?

I had assumed that it worked like this. A radio signal from the antenna if split into identical copies. One is then multiplied by a Cosine wave, and is called the I signal. The other is multiplied by a Sine wave, and is called the Q signal. The 2 sinusoidal waves are described by the equations Cos(2...
by Ben321
Sun Mar 05, 2017 10:16 pm
Forum: RTL-SDR Discussion
Topic: SDR# scanner plugin creation request
Replies: 3
Views: 3551

Re: SDR# scanner plugin creation request

rtlsdrblog wrote:Are you sure frequency manager suite can't already do this? http://www.freqmgrsuite.com

I believe you just need to add your favorite frequencies to a group, then you can scan that group only.
Can it actually scan the group?
by Ben321
Sun Mar 05, 2017 9:29 pm
Forum: RTL-SDR Discussion
Topic: How do I use RTL-TCP?
Replies: 10
Views: 20743

How do I use RTL-TCP?

I'm running RTL-TCP.exe on my computer (which is a server program that allows other programs to get raw IQ data and send control commands, all via TCP), and am writing a TCP client program to communicate with it. It's MUCH easier to write a program that deals with networking (via MS Winsock in Windo...
by Ben321
Sun Mar 05, 2017 8:12 am
Forum: RTL-SDR Discussion
Topic: SDR# scanner plugin creation request
Replies: 3
Views: 3551

SDR# scanner plugin creation request

In light of the fact that all available scanner plugins for SDR# are missing what I consider an important feature, I'm putting out this request to any/all programmers here who have knowledge of how to create SDR# plugins. Here's the problem, all scanner plugins currently work by scanning through a r...