Search found 38 matches

by mark.
Thu Aug 16, 2018 12:55 pm
Forum: SDRuno
Topic: SDRuno: best settings for AIS decoding?
Replies: 4
Views: 589

Re: SDRuno: best settings for AIS decoding?

I am receiving small blips at those 2 frequencies so I assume those are the AIS signals. I'm about 7 miles west and uphill from the Lake Michigan shoreline in Milwaukee with a 2 meter antenna at the top of my 40 foot tower. So I'm probably set up for good reception. What type of messages are you dec...
by mark.
Wed Aug 15, 2018 5:45 pm
Forum: General
Topic: SDRuno S-Meter = S5 With No Antenna
Replies: 13
Views: 1103

Re: SDRuno S-Meter = S5 With No Antenna

Thanks. My fault for not scrolling far enough. I didn't realize there were 2 charts. :oops:
by mark.
Wed Aug 15, 2018 1:38 pm
Forum: General
Topic: SDRuno S-Meter = S5 With No Antenna
Replies: 13
Views: 1103

Re: SDRuno S-Meter = S5 With No Antenna

Odd. I wanted to duplicate my above observation. Without changing any settings I shut down SDRuno and started it back up. This time the jump in s units from 0-4 happens right at 30 mhz. IIRC that is where a new front end filter gets switched in. Could the s meter jump be related to that? My noise fl...
by mark.
Wed Aug 15, 2018 1:24 pm
Forum: General
Topic: SDRuno S-Meter = S5 With No Antenna
Replies: 13
Views: 1103

Re: SDRuno S-Meter = S5 With No Antenna

With RSP1 and SDRuno 1.22 In my case with the same 50 ohm terminated antenna connector my s meter reading is fine until I get to 29.914 mhz and LO at 29.00mhz. At that point the s-meter will jump up a few s units. How much it jumps up depends on if the LNA is on or off and where the IF gain slider i...
by mark.
Thu Jul 05, 2018 2:00 am
Forum: SDR Antennas
Topic: magnetic loop and pre-amp?
Replies: 5
Views: 1164

Re: magnetic loop and pre-amp?

RSPs have a sensitive front end. A preamp should not be needed for casual listening. Are you saying you pick up no signals at all? Even in the AM and FM broadcast bands? If the antenna is indoors maybe it is close to a strong source of rf noise that is wiping out reception.
by mark.
Mon Jul 02, 2018 12:34 pm
Forum: SDRuno
Topic: Issue when switching on LNA
Replies: 2
Views: 468

Re: Issue when switching on LNA

I live close to a few powerhouse AM and FM transmitters. One of these days I have to build some filters. I found I don't need the LNA below 25mhz. But when I do use the LNA for 10-11 meters I start to see images of the commercial FM signals.
by mark.
Fri Jun 29, 2018 12:47 pm
Forum: SDRuno
Topic: Issue when switching on LNA
Replies: 2
Views: 468

Issue when switching on LNA

I have an RSP1. I don't use the RF AGC feature. When I enable LNA my IF gain reduction slider changes automatically. So I find I always have to manually slide it back where it was. Is it just me or do others find this annoying.
by mark.
Sat Jun 23, 2018 3:26 am
Forum: New Users' experiences
Topic: RSP1a only noise
Replies: 5
Views: 1069

Re: RSP1a only noise

Also screw your antenna into another radio to make sure the antenna,cable and connectors are good.
by mark.
Mon Jun 18, 2018 12:52 am
Forum: SDRuno
Topic: bugs in sdruno
Replies: 4
Views: 726

Re: bugs in sdruno

I used the term ringing because the other poster did. Its more of a howl in that its just on the verge of breaking into oscillation. It changes pitch as you change bandwidth. If this forum allowed attaching an audio clip I would. But I'm too lazy to record one and upload it to some hosting site to l...
by mark.
Sat Jun 16, 2018 7:51 pm
Forum: SDRuno
Topic: bugs in sdruno
Replies: 4
Views: 726

Re: bugs in sdruno

Months ago I noticed that same issue with the filtering ringing sound and did the same workaround that you did with the notch filters. I never mentioned it here because I thought I was being too nitpicky or that it was because of my older sound card.

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