Eric,
Again, thanks for the information. Exciting on the low band stuff. Even 2200 M. Wow. I just need to figure out how to stretch out that mile of wire around my property now. J Your write up still didn't clear it up for me on the diversity receive/beam steering. However, I did talk with Gerald. After he explained it 3 different ways, the light finally came on. It comes down to you need to two SCU's to get the physical phase delay which must be captured from our analog world. (That is the "additional information" to which you refer.) You have to have the separate SCU to get the additional information into the system on the second antenna. Slice receivers won't do it, as you are only getting the same info or other bands on the slices. Hence the need for the 6700. I get it! I'm slow on the uptake. But I'm not afraid of asking stupid questions until I do get it. Bummer on the misinformation on 2M. sigh 73, Scott AC8DE From: Eric Wachsmann [mailto:[email protected]] Sent: Monday, May 21, 2012 5:07 PM To: Scott Myers Cc: [email protected] Subject: Re: [FlexEdge] Which one do I want? We understand the need for clear information and are working towards a dynamic FAQ that we can publish and expand on the website. Please bear with us as we are still recovering from the Dayton trip. In the interest of some clear answers, see my comments below. Eric Wachsmann FlexRadio Systems Tune in ExcitementT On Mon, May 21, 2012 at 3:05 PM, Scott Myers <[email protected]> wrote: snip 1 - 2 Meters I thought both the 6500 & 6700 had 2 meter. At least this is the info I was given at the show, before I pulled the trigger. Another post said the 6500 didn't have 2 meters. [Eric] Only the 6700 will support 2m without external transverters. The output is 0dBm nominal. The brochure is somewhat confusing on this and we'll clarify this on the spec table. 2 - Diversity receive and beam steering I'm really trying to get my head around why only the 6700 will do this. I assumed the 6500 would do this. (Pardon my thickness on this.) Since the 6500 has a "Receive A" and standard antenna connector, why won't it do it? I read a previous post on this subject, but it read like Greek to me. [Eric] While you can have up to 4 or 8 slice receivers depending on the model (6500 = 4, 6700 = 8), there is another important distinction. The 6700 includes a complete second RF front end. This includes the preamplifiers, filters, and the wideband ADC. We call this a Spectral Capture Unit or just SCU for short. While you could put multiple slice receivers from the same SCU on the same frequency and do "diversity" on it, it would serve no benefit as the digital data used would contain no additional information. In order to do diversity like we do with the FLEX-5000, you need a separate front end to provide an input from a separate antenna. 3 - Satellite operation Is the 6500 going to be sufficient for Satellite operation? [Eric] With the appropriate external hardware to run 70cm and any necessary amplification of the nominal 0dBm output on 2m, the answer is yes. 4 - 600 Meter operation I know this is somewhat of an unknown thing yet. But being a SDR, will the 6000 series (or any Flex) be able to handle RX and TX on the newly to be assigned 600 meter band? [Eric] Yes! This, 2200m, and 4m are all covered on both receive and transmit (again low power, nominal 0dBm output). _______________________________________________ Flexedge mailing list [email protected] http://mail.flex-radio.biz/mailman/listinfo/flexedge_flex-radio.biz This is the FlexRadio Systems e-mail Reflector called FlexEdge. It is used for posting topics related to SDR software development and experimentalist who are using beta versions of the software.
