И вот сегодня как раз новость от Deepace :
Wider frequency ranges, Dual port vector analysis, Digital IF processing, Powerful 7GHz Handheld Analyzer KC901V Coming Soon!!
http://bbs.deepace.net/index.php/topic/show/35We have received much positive feedback since we launched the KC901S. With the manufacturing process improving, instruments with higher frequencies and higher accuracy have been in development. Kechuang Institute began development of the KC901V RF multimeter in September 2015. Its basic functions are similar to the KC901S. The KC901V’s frequency range is up to 5.8G, which is the microwave communication band. The development time frame was three months and the development was expected to conclude by the end of 2015. However, various issues, such as having to change the chipset three times to address bugs, have caused a three-month delay in the completion. Testing of the KC901V was completed on 02-03-2016. Currently we are working on final testing. If we are able to keep on track, we will be expecting to launch KC901V in June.
The differences between KC910S and KC901V (Only for reference. The final version will be taken as the final standards)
1. Wider frequency ranges. The lowest valuable frequency is down to 5kHz and the highest one is up to 7GHz.
2. The sensitivity of the spectrum is 10dB lower than the KC901S.
3. The KC901V’s S21 signal direction is opposite to the KC901S. So the measuring port position interchanged while testing the S21. S21 is vector measurement too, and it can test the phase and group delay simply. S21 only supports the simple calibration. But over all, the functions of KC901V are more powerful than KC901S.
4. Both antenna analyzer and spectrum functions use the digital intermediate frequency technology. So the RBW can be adjusted in a small range.
5. The uncertainty of amplitude (relevant to phase) has been improved by an order of magnitude. In other words, the impedance measurement will be more accurate than the KC901S.
The following picture shows the absolute directionality of the bridge (uncalibrated). The amplitude’s fluctuation can be removed by calibration. Note that the frequency at the right most side is 7GHz. If focused on the low frequency’s directionality, it can reach 40dB in the range of 0-3G. But it will be broken once it’s over 3G. After adjusting the directionality from 3-6G to 20dB, the low frequency will be in degradation in somehow. But for the handheld vector instruments, this directionality is enough to satisfy the operation demands.
About the appearance, KC901V has the new interface display as well as the different shell color compared with KC901S.