Search found 321 matches

by g1hbe
Sun Jun 17, 2018 4:46 pm
Forum: General
Topic: RSPduo Bias-T
Replies: 4
Views: 63

Re: RSPduo Bias-T

It's worth checking to see if the voltage is appearing at the tuner 1 port instead. The rsp2 suffered from swapped-over ports a few months ago and it caused great confusion!
by g1hbe
Fri Jun 15, 2018 2:56 pm
Forum: Spectrum Analysis
Topic: Sweep width availability
Replies: 1
Views: 100

Re: Sweep width availability

Quote from the 'feedback' thread:

'As mentioned in the release notes, due to problems with the sweep system, sweep widths of less than 10KHz, and greater than 10MHz have been disabled. This issue will have been resolved for the next release. '
by g1hbe
Thu Jun 14, 2018 11:47 am
Forum: Spectrum Analysis
Topic: Feedback for version 0.9a here
Replies: 71
Views: 1837

Re: Feedback for version 0.9a here

Thanks for a very interesting piece of software. On a rather cursory look at it yesterday I noticed some thing odd. I normally use a Signal Hound SA-44b analyser, so I did a comparison with that. With the CF set to 3.0 MHz and a signal on 3.01 MHz at -40dBm, the SH shows a peak as expected at 3.01 M...
by g1hbe
Fri Jun 01, 2018 10:07 pm
Forum: SDRuno
Topic: How can I set the zoom on Main SP
Replies: 9
Views: 1630

Re: How can I set the zoom on Main SP

It sounds like you have an antenna or coax problem - are you sure all connections are good (no shorts etc)? Check also the sma plug to make sure it has a centre pin. The only other thing that may cause poor reception is incorrect setting of the gain slider. If you are using the RSP2, check you have ...
by g1hbe
Thu May 31, 2018 6:01 pm
Forum: SDRuno
Topic: How can I set the zoom on Main SP
Replies: 9
Views: 1630

Re: How can I set the zoom on Main SP

To see max bandwidth, select 10 MHz sample rate and decimation 1. This will give you the RSP's maximum bandwidth of 10 MHz. Both these settings are found in the small MAIN window. Then just check that you are zoomed right out by clicking the < ZOOM button at the bottom of the big MAIN SP window. You...
by g1hbe
Wed May 30, 2018 1:37 pm
Forum: SDR Antennas
Topic: RSP2 with ALA1530 Antenna
Replies: 1
Views: 240

Re: RSP2 with ALA1530 Antenna

Hi. I have had a 1530 and then the 1530LN for years and I swear by them, but connecting the 50-ohm coax output from the interface box to the green connection block causes much confusion among enthusiasts. The first thing to realise is that a mismatch of 50r to 1k is not that serious and any loss inc...
by g1hbe
Tue May 29, 2018 11:15 pm
Forum: SDRplay related
Topic: When will we see support for 14 bits in RSP2?
Replies: 1
Views: 377

Re: When will we see support for 14 bits in RSP2?

Don't quote me, but I think that in order to be able to free-up the extra bits, a small hardware change was necessary.
by g1hbe
Tue May 29, 2018 7:25 am
Forum: SDR Antennas
Topic: External LPF / Attenuation
Replies: 1
Views: 231

Re: External LPF / Attenuation

I've never had to put attenuation on the Hi-z port as I find the range of the RF gain slider is plenty enough. A set of filters is a good idea. I use a LPF to roll off everything above 500KHz when I'm looking for NDB's (200 to 500 KHz) and another LPF which rolls off at 100 KHz when I'm looking for ...
by g1hbe
Sun May 27, 2018 10:05 pm
Forum: SDRuno
Topic: Corruption of SAM SB audio
Replies: 5
Views: 355

Re: Corruption of SAM SB audio

What's actually happening - ie what does it sound like? I notice from your screenshot that your noise level is high and I can't see the level of the incoming signal as it is hidden behind the SAM box. However I think the SNR is very poor, possibly 3dB? I think under those conditions it would be diff...
by g1hbe
Sat May 26, 2018 5:08 pm
Forum: SDRuno
Topic: SDRuno Software Issue
Replies: 2
Views: 250

Re: SDRuno Software Issue

This sounds like the bug that has the default step for AM set at 100kHz. It's due to be corrected soon, I think. You can select a step of your choice by right clicking in the main frequency display area and selecting from the menu.

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