Search found 38 matches

by franko
Sun Nov 18, 2018 8:05 pm
Forum: SDRplay related
Topic: Safe distance between RSPduos and a low-power WSPR transmitter?
Replies: 2
Views: 56

Re: Safe distance between RSPduos and a low-power WSPR transmitter?

Thanks, Roger. From the documentation it appears that the WSPR transmitter's power output can be set at custom levels using the configuration software -- I'll check that out further. Regarding RF limiters, I saw the following item mentioned here or in one of the other SDRplay discussion sites a few ...
by franko
Sat Nov 17, 2018 8:36 pm
Forum: SDRplay related
Topic: Safe distance between RSPduos and a low-power WSPR transmitter?
Replies: 2
Views: 56

Safe distance between RSPduos and a low-power WSPR transmitter?

I have two RSPduo's with several virtual receivers each running 24/7 to monitor a number of HF FT8 bands. One is connected to a Wellbrook ALA1530LNP magnetic loop antenna, the other to a W6LVP magnetic loop antenna. Later today I'll be receiving one of these WSPR transmitters: https://www.zachtek.co...
by franko
Tue Oct 23, 2018 4:59 pm
Forum: SDRuno
Topic: Why are these SDRUno instances performing so differently?
Replies: 9
Views: 803

Re: Why are these SDRUno instances performing so differently?

Hi Roger, this sounds a little like the diversity mode offered in some transceivers, where the radio makes use of two separate antennas to increase its ability to pull weak signals out of noise. I wonder if there is (or will ever be) a way to do that in SDRUno or other software making use of more th...
by franko
Tue Oct 23, 2018 4:49 am
Forum: SDRuno
Topic: Why are these SDRUno instances performing so differently?
Replies: 9
Views: 803

Re: Why are these SDRUno instances performing so differently?

Thanks much for the explanations -- they are very clear. My objective is, first, to test RSPduo's against each other to ensure that there is no significant difference in their performance, and then use them to compare different antennas on a given band in real-time. This information will help enable...
by franko
Mon Oct 22, 2018 10:13 pm
Forum: SDRuno
Topic: Why are these SDRUno instances performing so differently?
Replies: 9
Views: 803

Re: Why are these SDRUno instances performing so differently?

Hmm, well, I seem to have my issue basically resolved now, though I'm not sure exactly what the cause was, or what fixed it. When I changed the sample rate to 2 MHz and clicked to display the SP1 windows, I noticed that the LO was somewhat different in one instance, so I sync'd them up. Now the two ...
by franko
Mon Oct 22, 2018 12:07 am
Forum: SDRuno
Topic: Why are these SDRUno instances performing so differently?
Replies: 9
Views: 803

Re: Why are these SDRUno instances performing so differently?

Okay, I have my hard disk issue resolved, and am ready to resume working on the question I posted about. I gather that proceeding with Main > Opt > Reset to Default Settings will return SDRUno to its factory defaults. I'm reluctant to do this at this point, because there may be settings in the curre...
by franko
Wed Oct 17, 2018 2:39 pm
Forum: SDRuno
Topic: Why are these SDRUno instances performing so differently?
Replies: 9
Views: 803

Re: Why are these SDRUno instances performing so differently?

Thanks for the suggestions. As an unrelated issue, one of the two hard drives in the PC's RAID array appears to be gradually failing, so I'm leaving the computer off for a couple of days until a replacement drive arrives. By the weekend I'll probably be ready to resume working with SDRUno, and will ...
by franko
Tue Oct 16, 2018 9:47 pm
Forum: SDRuno
Topic: Why are these SDRUno instances performing so differently?
Replies: 9
Views: 803

Why are these SDRUno instances performing so differently?

I'm scratching my head over results I got when testing a couple of RSPduo units today, and would be interested in any ideas. I have two RSPduo's (call them units A1 and A2) both connected to the same Windows 7 PC. Antenna port 2 of each RSP is connected via SMA cable to one of the two outputs of a M...
by franko
Sun Sep 09, 2018 4:07 pm
Forum: General
Topic: Test to determine if receive damaged?
Replies: 7
Views: 990

Re: Test to determine if receive damaged?

A simple test using an $12 noise generator and two home made attenuators is described here: https://www.sdrplay.com/community/viewtopic.php?f=5&t=3352 Great post, thanks for the link. I ordered one of the noise sources and will try this out when it arrives (probably in 2-3 weeks). What design d...
by franko
Sun Sep 09, 2018 12:00 am
Forum: General
Topic: Test to determine if receive damaged?
Replies: 7
Views: 990

Re: Test to determine if receive damaged?

Contact a 2-Way shop in your area, ask if they can use the service monitor they all have to test the rigs sensitivity. Thanks for the suggestion. Is there a more specific name for the service monitor equipment? I bought the RSP's from a Ham Radio Outlet, so I could ask them. Then again, it also occ...

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