Search found 18 matches

by KE2KB
Wed Dec 07, 2016 4:22 pm
Forum: SDRuno
Topic: Zero vs Low IF
Replies: 3
Views: 1626

Re: Zero vs Low IF

Thanks guys; I guess the SDRPlay defaults to Zero IF so that you can get the full 10Mhz bw, which seems to be a big selling point. I am finding that I use 2Mhz most of the time. After all, there isn't one HF Amateur band that spans even 2Mhz! Interesting about the LO vs tuned frequency. When I first...
by KE2KB
Tue Dec 06, 2016 7:44 pm
Forum: SDRuno
Topic: Why so much delay?
Replies: 3
Views: 1705

Why so much delay?

Hi; I was listening to a repeater on my Yaesu FT60R, and at the same time listening to the same repeater and its input on SDRPlay RSP1 with SDRUno 1.1. There was about 1/2 seconds delay on the SDR compared to the repeater direct on the Yaesu HT. I tried switching to ASIO drivers, but that didn't cha...
by KE2KB
Mon Dec 05, 2016 11:52 pm
Forum: SDRuno
Topic: Zero vs Low IF
Replies: 3
Views: 1626

Zero vs Low IF

I had to learn the hard way when to use Zero-IF and when to use Low-IF, during which time I was baffled. I had been listening to the 40m band using the default Zero-IF. At some point I switched to the AM broadcast band, and found that when I tuned to one of my local stations (880Khz), set the filter...
by KE2KB
Mon Dec 05, 2016 1:23 am
Forum: SDRuno
Topic: QRN (noise) reduction?
Replies: 6
Views: 2017

Re: QRN (noise) reduction?

Thanks for the advice DXer; I can't use the AM "Soft Filter", because I'm not listening to AM, but to SSB on the amateur bands. My USB cable does have ferrites at each end, but perhaps I could buy a better one. I also tried a different USB port, but couldn't find one that was less noisy. M...
by KE2KB
Sun Dec 04, 2016 11:13 pm
Forum: SDRuno
Topic: What is "LO Plan Frequency"
Replies: 2
Views: 1276

What is "LO Plan Frequency"

Hi; I'm new to SDR, but not to Amateur radio. That said, I have never heard of "LO Plan Frequency", so I am trying to figure out what it is in regards to the setting in SDRUno 1.1 with SDRPlay RSP1. I do know that LO is Local Oscillator, and do understand basic receiver theory (I used to k...
by KE2KB
Sun Dec 04, 2016 5:11 pm
Forum: SDRplay related
Topic: Proposed upgrades to RSP1 no cancelled ??
Replies: 14
Views: 7878

Re: Proposed upgrades to RSP1 no cancelled ??

Does anyone know what the RSP2 does (if anything) to reduce images? It's been a while since I've been "in the books" on RF engineering. Would dual conversion reduce images, or just introduce new ones? I have to do a complete run on the RSP1, which I purchased a couple weeks ago, to determi...
by KE2KB
Sat Dec 03, 2016 7:24 pm
Forum: SDRuno
Topic: SDRUno 1.1 ZAP function
Replies: 2
Views: 2258

Re: SDRUno 1.1 ZAP function

On my Windows 10 and Windows 7 SP1 install of SDRUno 1.11, the Zap button doesn't appear to do anything at all, but the VFO button at the bottom of the SP1 window does center the current frequency in the window if zoomed in at least one level. Otherwise, that button does nothing as well. I have also...
by KE2KB
Sat Dec 03, 2016 5:40 pm
Forum: SDRuno
Topic: QRN (noise) reduction?
Replies: 6
Views: 2017

QRN (noise) reduction?

Hi; I have a new SDRPlay running with SDRUno on Windows 10 and Windows 7 (dual-boot). Everything is working, albeit I am still learning the more technical workings of SDRUno, but I have one complaint. SDRUno doesn't seem to do enough to reduce the background noise (QRN) associated with simple random...

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