Hi all:

After not using my RX-888 MK II for a few weeks I started it this afternoon and it really is acting strange.

The audio is rather muffled on MW, the frequency display is way off...

• tuning 740 kHz on the display receives 960 kHz on the receiver.
  
  
• seemingly near-deaf on HF.
  
  
• BC-FM tuning 90.560 on the display receives 89.500 on the receiver.
  
  
• NOAA 162.550 MHz. - - tuning 163.836 on the display receives 162.550 on the receiver.

I've had this radio calibrated exactly before and its performance was pretty good before now.

Attached is a screenshot showing the situation for receiving NOAA weather on 162.550 MHz and also 960 kHz on MW.

Sorry, I momentarily forgot how to do screenshots here.

And, trying once more.

Full size so it's readable, please. (Attachments tend to work. Including them into the message leads to groups.io shrinking them losing all the detail.)

{^_^}

Sorry, one of those last two worked.

Well, one difference I see with the way I use it and the way you are using it is that I run the full 64 MHz bandwidth and simply tune to the section I want to see. Working that way I desperately need an intermediate bandwidth window to show the narrower view you have. I've not had it notice it showing me the wrong frequency when doing that, however. I suspect the way you have it setup MAY show aliasing.

The RX888 MK2 does not include any RF tuner or filtering beyond the 64 MHz anti-aliasing filter.  I don't know how Simon implements lower sample rates. People using that seem to have had problems. So I use it the way I use it.

{o.o}   Joanne

Joanne:

You run yours more like this then?

And here is the 89.5 BC-FM. It should be over where the KBAQ marker is.

Also, in the first post, I mentioned that the audio is mostly horrible.

It's got me totally stumped.

No, I don't think so. I am not sure how you have your windows arranged.

Ah - multi-band view is in use? That doesn't look like it to me.

(I think this works in T'bird....) This is how my main window looks with 120 MHz sample rate.

You cannot use zoom to look at AM broadcast only. Are you docking a Multi-Band to view that narrower segment? And have you noticed the bottom bar on the waterfall? Compare it to mine. I'm not sure what is going on here. (When I set to x50 for the bottom bar it goes out to absurd frequencies.) It looks like something is set to about a sample rate below 1 MHz. Look in the radio definitions.

{^_^}   (Going to bed soon. Had to get up 0500 today to get Loren in to cataract surgery. I'm flogged.)

Regarding VHF - somebody else can answer that. I've not bothered to use it. You do NOT want to try to get more than 10 MHz bandwidth on VHF. That's all the tuner does. In other regards I'd expect it to act pretty much like an AirSpy R2. (I have one so don't plan to use an RX666 derived product for it.)

For HF - sample rate to 120 MHz or 128 MHz. Set center of main screen to 32 MHz. Leverage the Multi-Band capability to look closely at specific bands. You'll probably have to design a setup for yourself.

{^_^}