Re: Price of the IC-7000
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Hi Buck,
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Yes, the IC-7000 will use DSP filtering in the final IF. This is the same technology as used in the IC-756Pro series, the IC-746Pro/7400 and the IC-7800. The ultimate performance of the DSP-IF subsystem - dynamic range, noise floor, filter shape factors, noise reduction etc. is a function of the ADC (analogue/digital converter) which is the interface between the analogue RF/IF chain and the DSP. The faster the DSP chip, the better the filter shape factors, NR etc. are likely to be. All the current Icom DSP-based radios use a 24-bit ADC and DAC and a 32-bit floating-point DSP. The 756Pro series uses the ADI SHARC, whilst the 746Pro and 7800 use faster TI devices. The ADC used in the 756Pro series has a slightly better noise floor than that of the 746Pro. The 7800 uses very high-quality ADC's which are rather costly. The demands placed on the DAC (digital/analogue converter are rather less than those which the ADC has to meet, although the DAC plays an important role in setting the dynamic range of the transmitter. The ADC is the key to the receiver; if it degrades the incoming IF signal, all that information is lost forever and cannot be recovered. There are a number of articles covering these topics (and others) on my Icom page. Cheers for now, 73, Adam VA7OJ/AB4OJ -----Original Message-----
From: Buck (N4PGW) [mailto:na4fm-list@...] Sent: 16 February 2005 05:58 To: ic7000@... Subject: [ic7000] Price of the IC-7000 Hello to all and thank you to the moderator of this reflector. Ever since I have seen the IC-7000, I have been reading and talking about it. Like most of us here, I have considered it the new IC-706 radio but after all I have read and seen, I have begun to think that 7000 is to the 706 what the 756 pro is to the 746 pro. What weighs most strongly is the fact that it will use electronic filtering rather than the crystal lattice filter. If I recall, isn't this the same filtering technology used in the IC-7800, the $10,000 radio? From what I gather, the 706 is the most popular mobile HF radio on the market with sales greatly exceeding its runner-up. Right now it sells for about $800 US. I realize that the cost of technology drops over time, and with inflation, prices rise a bit, but at this point I am wondering if the rig might not be priced considerably higher than the 706. Around here, a few hams are thinking it will be in the $1500 US range. What do you all think? Buck N4PGW Scanned by WinProxy |
Adam Farson