Bob, I got the point, thank you. Jean-marc
Bob McGwier a écrit : > Jean-marc BORD wrote: >> Hi Tim, >> >> Thank you for your feedback, I love your marketing and your sales >> addiction. >> As least when you say No, one would love to have a minimum >> explanation rather than just 'No'. >> >> I can cope with answer 37 as it is pure hardware design, but 38 is >> just not a fair answer, as long as you have spare parts for SDR1K . >> I'm pretty sure you can sell them, especially aiming to improve your >> customer's equipments and satisfaction. >> >> 73's >> Jean-marc F1HDI >> > > Jean-marc: > > There is no separate BPF board in the Flex 5000 systems. The filter > board is integral to the transmitter or receiver. Part of the reason > for this is that the entire base system board has one RX and one TX on > it, is almost all surface mount, extremely low profile, and fully > balanced everywhere. This makes it especially quiet and easier to > manufacture than the SDR-1000 (by a lot). > > Frankly, it is a testimonial to software radio that the same software > is going to run on both systems except for those capabilities added to > the new radio that are unavailable on the SDR-1000. > > Bob > N4HY > > >> >> Tim Ellison a écrit : >> >>> >>> Jean-marc, >>> >>> The answers to your question can be found in the Knowledge Base >>> FLEX-5000 FAQ article listed as questions Q37, Q38, Q39. >>> http://kb.flex-radio.com/article.aspx?id=10374 >>> >>> -Tim >>> ----- >>> FRS KB Administrator >>> >>> -----Original Message----- >>> From: [EMAIL PROTECTED] >>> [mailto:[EMAIL PROTECTED] On Behalf Of Jean-marc BORD >>> Sent: Wednesday, April 11, 2007 2:39 AM >>> To: [EMAIL PROTECTED] >>> Subject: [Flexradio] Two silly questions >>> >>> Hi, >>> >>> I have two areas of interests , which I don't see covered in either the >>> Flex5000 Faq nor in the SDR1000 kdb >>> >>> a) The SDR1K main weaknesses are coming from the DDS/mixer board, >>> and at >>> a lower level by the non-narrowband BPF. >>> On the first issue of concern, is the SDR5k design permitting an >>> DDS/mixer upgrade as a kit for the SDR1K ?. >>> On the second one, is it possible to get bandpass filter PCBs (I would >>> need two) without the BPF components or without any components at an >>> affordable price as the 3 pole chebischev can be reworked for 6 >>> narrower >>> HamBand BPF >>> >>> b) When designing a 'fixed 11,025kHz' narrowband receiver, the I/Q >>> rejection is done within this narrowband (up 9,9kHz wide) and is pretty >>> constant . As soon as you introduce dual watch, the I/Q calibration >>> done >>> at only 11,025 is not consistent within the full 80kHz audio band >>> coming >>> from the sound card (FA66 96k here). This is why m0kgk has a full I/Q >>> cal within the the full AF range. Do you intend to expand the I/Q >>> cal to >>> the full AF spectrum in the future ?, if yes, either it would need the >>> user to feed the receiver with multiple carriers or ask for one >>> external >>> carrier and move the LO accordingly (the strong assumption here >>> would be >>> that the I/Q drifts are mainly coming from the soundcard). >>> >>> Kind regards >>> Jean-marc F1HDI >>> >>>> >>> _______________________________________________ >>> FlexRadio mailing list >>> [EMAIL PROTECTED] >>> http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz >>> Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ >>> FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: >>> http://www.flex-radio.com/ >>> >>> >>> >> >> >> _______________________________________________ >> FlexRadio mailing list >> [EMAIL PROTECTED] >> http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz >> Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ >> FlexRadio Knowledge Base: http://kb.flex-radio.com/ >> FlexRadio Homepage: http://www.flex-radio.com/ >> >> > > _______________________________________________ FlexRadio mailing list [EMAIL PROTECTED] http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/
