The front USB port will power a wireless USB mouse / keyboard. You can plug in a mouse and keyboard into any of the USB ports to use with the UX. The K4 includes the expected TX & RX 8 band EQ settings, a simple Macro language that you can use to assign to buttons or external software, and every "standard" feature that you would expect in a rig of this class. As soon as I heard how well the K4 handled both the strong and weak stations, I knew that it was this feature that was making it's presence known. The OFF setting will slightly improve preamp-off sensitivity."Īll I know is that it works and it's amazing. In general it should be left at the default setting of ON, which configures the ADCs for best response to very strong signals. Range Optimization menu entry can be used to customize behavior of the K4's analog-to-digital converters (ADCs).
Rfx 150 rear mounted amp schematic manual#
Here's the excerpt from the manual that describes this feature: The K4 has a feature called "RX Dynamic Range Optimization" which is normally turned on. While listening to a net on 40m, there is the typical range of very strong, very weak, and every signal strength in between. Without changing any parameter related to AGC (which you can tailor significantly), I tuned to 40m SSB, turned on the Attenuator to kill some of the ambient noise (attenuator range is from 3db to 21db in 3db increments) adjusted the RF Gain slightly and dialed around to listen to various stations and was absolutely impressed by the way even weak stations popped out. After getting over my initial fascination with the display, it was time to dial around and listen for a while. I could write a small book about the UX, but I'll save some of that detail for later. If you touch the top left part of the screen where the S Meter exists, it will change to a "Mini Pan", zoomed in on the frequency you're monitoring (shown above). That's right, there is a screen capture feature that will write to the USB device you've inserted into the front port. For example, you can freeze the screen, which is helpful if you want to take a screen shot, like this: There are a couple of extra features that are pretty useful. Lastly, the touch screen is intelligent enough to usually "snap to" the waterfall station you're trying to listen to.
The waterfall has a NB setting that you can set to AUTO or adjust as desired. The "AUTO" reference level just works and I haven't found a reason to turn AUTO off yet. The span can be adjusted all the way out to 368 Khz or as tight as 5Khz.
Rfx 150 rear mounted amp schematic Pc#
For lack of a better explanation, I always felt that the Icom 7300 panadapter was "muddy" compared to PC based implementations. First, the most important thing is the way signals just really pop on the screen on the K4 using even just the default display settings. Having used both, I can say without a doubt that the Elecraft implementation is superior in every way possible. I purchased an Icom 7300 when they first came out, curious about how well the touch screen panadapter would work. I will post more pics with other configurations in the coming weeks as I have a new LCD on order which I will dedicate to the rig. In the picture above, I'm showing the Panadapter for both VFO A and B in a split screen, while displaying only a wider VFO A panadapter on the rig.
The HDMI interface allows you to run an external display with several configurations controlling how it is used. The interaction with the rig is a very thoughtful blend of touch screen and traditional buttons and knobs.
First, the display and user interface is stunning.
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