Search found 10 matches

by IQbert
Thu Apr 19, 2018 5:44 pm
Forum: Spectrum Analysis
Topic: RSP Spectrum analyser software available shortly
Replies: 89
Views: 71110

Re: RSP Spectrum analyser software available shortly

Nice! Would this be able to do modulation analysis as well? (i.e. QPSK, 16QAM, FM deviation, analog % modulation etc.)
by IQbert
Thu Mar 08, 2018 1:27 am
Forum: General
Topic: RSP1A Bias -T
Replies: 4
Views: 4225

Re: RSP1A Bias -T

I haven't looked at the schematic, but typically a voltage is added to an RF line through an RF Choke/inductor. Remove that, and tap into the non-RF side. Good luck.
by IQbert
Tue Feb 27, 2018 11:59 pm
Forum: SDRplay related
Topic: Anyone ? - An SDRplay Radio Used As The Core Module
Replies: 4
Views: 3668

Re: Anyone ? - An SDRplay Radio Used As The Core Module

There are many Android-based double-din car radios that are affordably priced.
I have often imagined having one of those based around the RSP.
Hopefully, that's in the works.
by IQbert
Thu Feb 22, 2018 10:56 pm
Forum: General
Topic: Do not connect to an antenna in the nearfield of a transmitting antenna?
Replies: 1
Views: 1902

Re: Do not connect to an antenna in the nearfield of a transmitting antenna?

Maximum input is either 0 or 10dBm (I can't recall at the moment). If your field strength will be that high at the antenna port, add an attenuator. Never leave your RSP at home 8-) .
by IQbert
Thu Feb 15, 2018 7:24 pm
Forum: SDRplay related
Topic: Audio output on Circuit board to solve latency?
Replies: 4
Views: 3697

Re: Audio output on Circuit board to solve latency?

Is there a point on the RSP1 circuit board to sample analog audio? If there was a way to directly grab audio before it get converted to digital and sent to the USB port, that would solve the latency issues. Take a look at this article that RadioUser did in December 2014 about the RSP. In the block ...
by IQbert
Thu Feb 15, 2018 7:13 pm
Forum: General
Topic: Antenna Ports A & B Reversed
Replies: 4
Views: 3568

Re: Antenna Ports A & B Reversed

All of these symptoms seem to point to your IF gain being too high. Have you tried to take your RSP to your friend's house and look at it working on his computer? Or have his on your computer? Take your time and play with the settings. Go through the manual page by page. This is an excellent device....
by IQbert
Tue Jan 30, 2018 11:52 pm
Forum: SDRuno
Topic: FM Stereo problem for v1.22
Replies: 4
Views: 3797

Re: FM Stereo problem for v1.22

Also, be sure that your VFO is offset from your LO. Many issues can occur when don't offset them.
by IQbert
Tue Jan 30, 2018 11:32 pm
Forum: SDRuno
Topic: SDRuno Unable to tune above 412MHz
Replies: 8
Views: 6420

Re: SDRuno Unable to tune above 412MHz

Are you installing Version 1.22? Perhaps try rolling back to an earlier version.
by IQbert
Wed Jan 24, 2018 2:10 am
Forum: SDR Antennas
Topic: Newbie question
Replies: 2
Views: 3796

Re: Newbie question

I think what is meant is an active transmit antenna. You don't want to send high power into your RSP that has a 1mW input limit, hence the warnings. Even if you have a TX/RX switch, it might fail and toast your box. If your "TX antenna" is disconnected from any active transmitting radio, then it's j...
by IQbert
Tue Jan 16, 2018 12:56 am
Forum: SDRuno
Topic: Ideas for future Updates
Replies: 33
Views: 25022

Re: Ideas for future Updates

1. Add the ability to demodulate the Quadrature signal when in SAM-DSB (Synch AM). Currently, we can only hear the In-phase signal. This would allow for distortion analysis and background monitoring. When in SAM, I could choose DSB-I (default) or DSB-Q (perhaps in a settings menu). 2. Allow the De-E...