tag:blogger.com,1999:blog-5679825113811261335.post4291284235539274110..comments2023-09-19T23:57:37.836-07:00Comments on Michele's GNSS blog: NT1065 reviewMichelehttp://www.blogger.com/profile/03657889163945060210noreply@blogger.comBlogger23125tag:blogger.com,1999:blog-5679825113811261335.post-27240394215899237152019-08-31T03:09:44.852-07:002019-08-31T03:09:44.852-07:00When I connected my NT1065 with the acquisition an...When I connected my NT1065 with the acquisition and tracking hardware in FPGA in the acquired code phase there is a random shift then we observed the sampling clock of NT1065 through spectrum analyser we noticed the sampling clock is changing ie not giving stable output. Kindly suggest what would be the problem. Is there any stability problem in the NT1065 RF board Anonymoushttps://www.blogger.com/profile/06514668132658292648noreply@blogger.comtag:blogger.com,1999:blog-5679825113811261335.post-19798632491746715542019-06-13T10:40:50.828-07:002019-06-13T10:40:50.828-07:00Sir,
I am using this card and when i set the loca...Sir, <br />I am using this card and when i set the local oscillator frequency to 1170 for receiving IRNSS L5 band @ 1176.4 MHz iam getting an IF frequency at 8.85 MHz instead of 6.4MHz. what could be the problem. Jathish J Khttps://www.blogger.com/profile/02489608544639286415noreply@blogger.comtag:blogger.com,1999:blog-5679825113811261335.post-22687319127340773072018-02-25T06:34:44.636-08:002018-02-25T06:34:44.636-08:00Dear Michele Bavaro
I am working on the gnss inte...Dear Michele Bavaro <br />I am working on the gnss interfrence mitigation ,please can you help to get the data with jammer for my simmulation..<br /><br /><br /> kind regardsAnonymoushttps://www.blogger.com/profile/09208694426401503587noreply@blogger.comtag:blogger.com,1999:blog-5679825113811261335.post-74585749297229955582017-09-30T01:16:46.694-07:002017-09-30T01:16:46.694-07:00Can you give the part no of the TCXO used on this ...Can you give the part no of the TCXO used on this board.Anonymoushttps://www.blogger.com/profile/06879252444045008679noreply@blogger.comtag:blogger.com,1999:blog-5679825113811261335.post-80831197170207973462017-07-20T02:02:00.882-07:002017-07-20T02:02:00.882-07:00Thanks for Reply,
Yes I'm using Active Antenn...Thanks for Reply,<br /><br />Yes I'm using Active Antenna, the on board (NT1065 Evaluation Kit) bias tee is used for power up.<br />Anonymoushttps://www.blogger.com/profile/11680507053503421942noreply@blogger.comtag:blogger.com,1999:blog-5679825113811261335.post-80459558898913385262017-07-19T23:05:20.724-07:002017-07-19T23:05:20.724-07:00Mah.. I am not a consultant to you guys.. that see...Mah.. I am not a consultant to you guys.. that seems a little specific for a blog comment.<br /><br />I don't know the specifics of the FMC evaluation kit.. so it's a little hard to guess what you should be expecting.<br /><br />Anyway, is the antenna an active antenna? <br />If no, you'd expect no difference when plugging it in and out of a channel input.<br />If yes, did you use a bias-tee to power it up?<br /><br />For FPGA code I'd say my friend Takuji has good references:<br />http://blog.goo.ne.jp/osqzss/c/e089caedb72f1a5b9e8ff6160b84ecc9<br /><br /><br />Michelehttps://www.blogger.com/profile/03657889163945060210noreply@blogger.comtag:blogger.com,1999:blog-5679825113811261335.post-40651441489929981042017-07-19T20:44:12.712-07:002017-07-19T20:44:12.712-07:00Hi Michel,
As I tried with NT1065 Evaluation Kit ...Hi Michel,<br /><br />As I tried with NT1065 Evaluation Kit using Zedboard, When I ported out Mag and Sign data (NT1065 Internal ADC output) to one of PMOD connector of Zedboard, it gives us Digital Output, but when we removed Antenna (GPS L1)from channel-1 still the same signals observed on DSO (no change), so please guide me How to capture actual and real data. If possible please suggest processing of raw data in FPGA.<br /><br />As well I ported out Clock from NT1065 it gives us perfect Output on DSO.<br /><br />Observation In NT GUI:<br />RF Gain: 25.3 dB, IF Gain: 16.6 (when we removed Antenna its showing: 50.3 dB)<br /><br />Status: Calibration Ok- Green,<br />AOK- Green,<br /><br />Settings selected as follows<br />TCXO-10MHz,<br />Channel-1 selected<br />PPL-A<br />IF pass Band-30.10MHz<br />2-bit ADC Output,<br />RF AGC- Manual<br />IF AGC- Auto<br />N-Divider-159<br />R-Divider-1<br />Anonymoushttps://www.blogger.com/profile/11680507053503421942noreply@blogger.comtag:blogger.com,1999:blog-5679825113811261335.post-16329400889481590172017-07-18T00:18:28.286-07:002017-07-18T00:18:28.286-07:00Hi...
I'm Interfacing NT1065_FMC Evaluation K...Hi...<br /><br />I'm Interfacing NT1065_FMC Evaluation Kit with Zedboard (source code provided by NT labs) in this through Xilinx chipscope acquiring data and using Matlab source code plotted spectrum (db Vs Frequency) the spectrum shows some peaks at 4.999Mhz and power level 139.3 dB, so is this correct data we are acquiring.(actually the data file provided by NT Labs Gives peaks at 6.001 Mhz and power level 71.87dB)<br /><br />Also our aim is to acquire real time raw data from NT1065_FMC Evaluation Kit and process it using FPGA/ Using MATLAB so please suggest us a method.<br /><br />As you tested NT Board in Jan 2016, at that time you used USB DAQ FX2LP for testing, In the same way we wanted to test it using FPGA will it be possible so please guide us.<br /><br />Thanks & Regards<br />Navnath ChikhaleAnonymoushttps://www.blogger.com/profile/11680507053503421942noreply@blogger.comtag:blogger.com,1999:blog-5679825113811261335.post-89428344455725072892017-07-16T23:10:56.528-07:002017-07-16T23:10:56.528-07:00Hi Michele,
Thank You for your guidelines, if the...Hi Michele,<br /><br />Thank You for your guidelines, if there is anything else I'll get back to you...Anonymoushttps://www.blogger.com/profile/06983471046295484874noreply@blogger.comtag:blogger.com,1999:blog-5679825113811261335.post-80323486765392567692017-07-16T21:30:03.983-07:002017-07-16T21:30:03.983-07:00Well, I think this has little to do with the NT106...Well, I think this has little to do with the NT1065 specifically.. I am not a super expert, but although it is always advisable to run both ends of a logic line with the same voltage, small differences in voltage are possible. Usually a small resistor takes care of limiting the currents involved in the voltage drop and also acts as a useful decoupling element for digital noise and/or return signals (which you might want indeed between a FPGA and a GPS front-end). Sometimes for better de-coupling you might even want to add a small capacitor in a RC configuration. Knowing nothing about your design, I'd mention that I have seen 33 ohm used in those cases in the past. <br />Also remember to check in the Zynq driver datasheet that the minimum valid input logic high level is well above 3V (usually it's 0.8*V - if that's the case you should be OK)Michelehttps://www.blogger.com/profile/03657889163945060210noreply@blogger.comtag:blogger.com,1999:blog-5679825113811261335.post-65878548992188199402017-07-15T00:45:23.846-07:002017-07-15T00:45:23.846-07:00Hello Michele,
We are trying to interface NT1065 ...Hello Michele,<br /><br />We are trying to interface NT1065 with Zynq FPGA, NT1065 is powered by 3V and (Zynq FPGA)Bank 34 in Zynq 7020 SoC by 3.3V, I mean we are configuring NT1065 registers using SPI interface from Zynq FPGA, will it work with 3.3V? <br />Because this is still under design stage<br />Please guide usAnonymoushttps://www.blogger.com/profile/06983471046295484874noreply@blogger.comtag:blogger.com,1999:blog-5679825113811261335.post-75286860231209439522017-01-12T04:37:30.797-08:002017-01-12T04:37:30.797-08:00This comment has been removed by the author.MKlimenkohttps://www.blogger.com/profile/04954643081691324396noreply@blogger.comtag:blogger.com,1999:blog-5679825113811261335.post-48682923153745816532016-07-15T00:35:52.591-07:002016-07-15T00:35:52.591-07:00I know the MAX2769 well: it will not do GPS and Gl...I know the MAX2769 well: it will not do GPS and Glonass simultaneously. I did not have issues worth mentioning though, what about yours? <br />For GPS+Glonass you need something like the CAN5125 or the XN116 (just google them). The NTLab NT1065 belongs to a new generation (not from 8 years ago as the MAX2769) and allows doing things that 4 individual MAX2769s won't. Please refer to the datasheets, and match characteristics with your actual needs.Michelehttps://www.blogger.com/profile/03657889163945060210noreply@blogger.comtag:blogger.com,1999:blog-5679825113811261335.post-45429466960826653132016-07-14T20:52:15.789-07:002016-07-14T20:52:15.789-07:00Hi,
I know my question was silly. Yes,I am an entr...Hi,<br />I know my question was silly. Yes,I am an entrepreneur. Can you introduce me some front-end chips to receive gps/glonass signal? What is your opinion about max2769? I had some problem with it. <br />Many thanks for your assistanceAnonymoushttps://www.blogger.com/profile/17010843212533584109noreply@blogger.comtag:blogger.com,1999:blog-5679825113811261335.post-18902378910185038242016-07-14T04:21:01.744-07:002016-07-14T04:21:01.744-07:00What an odd comment..
If I answer "no" I...What an odd comment..<br />If I answer "no" I will unmotivatedly cast doubts over the seriousness of NTLab as fabless chipset design Company.<br />If I answer "yes" I will take full responsibility over your next build of "reliable" GNSS receivers.<br />So I guess I shall not answer.. or rather do with another question "are you an entrepreneur?"<br />Michelehttps://www.blogger.com/profile/03657889163945060210noreply@blogger.comtag:blogger.com,1999:blog-5679825113811261335.post-34016057845542224942016-07-14T04:08:58.153-07:002016-07-14T04:08:58.153-07:00Hi,
NT1065 or NT1036 are new Front-End chips from ...Hi,<br />NT1065 or NT1036 are new Front-End chips from unknown factory. what is your opinion about these chips? can I use these chips for implementing reliable GNSS receivers? <br />Best RegardsAnonymoushttps://www.blogger.com/profile/17010843212533584109noreply@blogger.comtag:blogger.com,1999:blog-5679825113811261335.post-23725667083663299922016-06-28T00:53:31.065-07:002016-06-28T00:53:31.065-07:00Now I am not sure anymore you understood my blog p...Now I am not sure anymore you understood my blog post..<br />The output of the NT1065 evaluation kit if digitized samples.Michelehttps://www.blogger.com/profile/03657889163945060210noreply@blogger.comtag:blogger.com,1999:blog-5679825113811261335.post-47520905589869273062016-06-27T23:20:15.681-07:002016-06-27T23:20:15.681-07:00What exactly is the output of the board? Is it the...What exactly is the output of the board? Is it the digitized samples of demodulated gps signal or is it the NAV data (baseband processed samples)? Anonymoushttps://www.blogger.com/profile/08527132253287220833noreply@blogger.comtag:blogger.com,1999:blog-5679825113811261335.post-78690935694197238752016-06-27T21:46:59.690-07:002016-06-27T21:46:59.690-07:00Thank you very much :)Thank you very much :)Anonymoushttps://www.blogger.com/profile/08527132253287220833noreply@blogger.comtag:blogger.com,1999:blog-5679825113811261335.post-60354532000113319722016-06-27T06:08:24.439-07:002016-06-27T06:08:24.439-07:00Well I only used the internal ADC converter of the...Well I only used the internal ADC converter of the NT1065 which worked really well for me. In fact, 2 bit samples guarantee virtually no loss in presence of AWGN only. Noisy environment would benefit more bits but it all complicates quite a bit. You can integrate a high resolution ADC with the evaluation kit: you will need to mount baluns and use the analogue output of the NT1065. Sharing the clock between the evkit and ADC would be wise. I suggest you contact NTLab if you are going to try tweaking to this level.Michelehttps://www.blogger.com/profile/03657889163945060210noreply@blogger.comtag:blogger.com,1999:blog-5679825113811261335.post-9385059936869302912016-06-27T02:53:22.396-07:002016-06-27T02:53:22.396-07:00Hi Michele,
I am thinking of buying the evaluation...Hi Michele,<br />I am thinking of buying the evaluation board of NT1065. I am not very convinced about the 2 bit ADC. How was your experience with getting the digital data from analog? Is the resolution good enough for further baseband processing? Is there a way to integrate a high resolution ADC with the eval board? Thank you for your response. Anonymoushttps://www.blogger.com/profile/08527132253287220833noreply@blogger.comtag:blogger.com,1999:blog-5679825113811261335.post-21712479143959544232016-06-24T00:03:26.496-07:002016-06-24T00:03:26.496-07:00I don't know, please ask NTLab. I understand t...I don't know, please ask NTLab. I understand that SwiftNav is building on the NT1065, so perhaps the next version of Piksi (expected for this fall) will be usable as evkit too. Cheers, MicheleMichelehttps://www.blogger.com/profile/03657889163945060210noreply@blogger.comtag:blogger.com,1999:blog-5679825113811261335.post-49178525563653730172016-06-23T22:25:55.566-07:002016-06-23T22:25:55.566-07:00What is the cost of the evaluation board?What is the cost of the evaluation board?Anonymoushttps://www.blogger.com/profile/08527132253287220833noreply@blogger.com