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iz0qwm ha scritto:

Ecco le parole di Jerry (copiatele e incollatele sul traduttore di google):

First I would like to dispel the rumors that there will never be a CS7000. The CS7000 has a lot of interdependent pieces that are dependent on other people as well as myself as will be explained.

The hardware for the CS7000 had previously been designed and is now subject to review of Covalue to make sure there are no obvious design errors. The same people who are working on the CS700 and CS800 are needed to look at and implement the design. Because the CS700 and CS800 were delayed, it was not possible to get the CS7000 hardware finished without interfering with the other projects. Now that those projects are essentially finished, I can press Covalue to finish the implementation of my hardware.

The CS7000 can be thought of as a combination PC, sound card, DMR coprocessor, and Vocoder coprocessor. Instead of a PC, we use a high speed 64 bit processor with built in floating point processor. The sound card consists of the A/D from the C5000 DMR coprocessor and the A/D built into the 64 bit processor. The Vocoder consists of the AMBE 3000R from DVSI and does all the vocoder technologies needed except for P25 Phase 1.

The most difficult part of this project is doing the firmware. While I am not finished I have a good start. My biggest problem in the past has been too many distractions answering customer call, supporting both radios and controller products, and just general corporate busywork. To solve this problem I hired Christopher Edwards (Chris) who is going to do most of the support of our products. His call sign is KK6MLY and he has an Amateur Extra Class license.

I should now be able to spend most of my time supporting the design of the CS7000 and I will give you more information of exactly what has to be done.

It is my intention to use Covalue to implement the DMR part of the radio with the utilities around that part done by myself. I also expect to get some help with the DSTAR part of the design.

While I appreciate all the offers for people to do Beta Testing of this product, I do not need more help at this time.

At this time the product is still in the R&D stage and there is no guarantee of the exact completion date. However there are some things about the project that can be said with a high degree of certainty.

DSTAR can be implemented with the existing hardware design. The reason why I am certain is because it has been done before using the same type of microprocessor. I believe the one that I am using is slightly faster than the one that was done by someone else.
DMR can be implemented with the existing hardware design. The reason why I am certain is because it has been done in the product called the CS700 and the design of the CS7000 is a superset of the CS700. Instead of the Vocoder being done with firmware like with the CS700, it is being done with hardware using the AMBE 3000R.
Analog can be implemented with the existing hardware design. The reason why I am certain is because the computational resources to do Analog is much less than it is to do Digital. Whether or not we can implement certain Analog functions such as DMTF decode and MDC1200 Decode will only be determined by trying it but there is reason to believe that all standard analog features can be implemented with the existing hardware.

I keep talking about implementing FUSION, NXDN, P25 Phase 1 and P25 Phase 2 after we are finished with the first version. The question is could those protocols be implemented?

FUSION, NXDN and P25 Phase II all use four level FSK and the AMBE 3000R Vocoder and should be able to be implemented with the existing hardware. However, until it is done there is no guarantee we can do it. The question being is it possible to implement the Four Level FSK modem with the existing hardware as well as the Convolution Encoding and Decoding, CRC error checking, scrambling, and a dozen other algorithms with the microprocessor we are using. If the existing architecture cannot support those other algorithms, then a future version of the CS7000 will have the existing microprocessor replaced with a fast DSP.

P25 Phase 1 will require the Vocoder to be done in Firmware because the existing AMBE 3000R does not support IMBE. The same comments about the ability for the existing microprocessor to be able to support the necessary algorithms still apply.

So if I am certain all the different formats can be done with a fast DSP chip, why was it not put in the original CS7000? The answer is because it took both Hytera and Kirisun over five years with a large staff of engineers to implement the DMR algorithm and sell a product. We are a much smaller company and we cannot afford to take the approach that the other companies took. We are taking a more conservative approach that should allow us to achieve the same results but in a much smaller time frame.

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