Hi One would *guess* that since it has the 702 antenna on it, it does have L1/L2 firmware enabled in the receiver ( 701 = single L1 band, 702 = L1 / L2, 703 = L1,L2.L5 ). Indeed the hardware spans a wide range of “things” depending on the exact license keys you shoot into it. Buying those keys “after the fact” never seemed to be very cost effective ….
Bob > On Oct 9, 2017, at 4:02 PM, Tom Van Baak <t...@leapsecond.com> wrote: > > Christopher, > > Thanks for that additional information. Can you (or Gregory) also comment on > the external frequency input / output and the 1PPS output of this receiver? > > A quick look at the om-20000128.pdf and om-20000129.pdf documents has words > like "better than 250 ns accuracy" and "50 ns increments" but I didn't see > mention of 1PPS quantization, sawtooth correction, or other words commonly > used in GPS timing receiver specifications. I'm guessing this product is > mostly designed for the PN part of PNT (Positioning, Navigation, Timing)? > > /tvb > > ----- Original Message ----- > From: "Christopher Hoover" <c...@murgatroid.com> > To: "Discussion of precise time and frequency measurement" > <time-nuts@febo.com> > Sent: Monday, October 09, 2017 12:35 PM > Subject: Re: [time-nuts] Novatel Dual frequency GNSS receivers on ebay > > >> I have quite a bit of experience with Novatel hardware include OEM6, CPT >> and SPAN. >> >> CPT is an IMU made by KVH and relabeled by Novatel. The accelerometers >> are MEMs and the roll rate sensors are FOGs. Pretty old design. >> Performance is decent (but not auto alignment good). >> >> http://www.kvh.com/Military-and-Government/Gyros-and-Inertial-Systems-and-Compasses/Gyros-and-IMUs-and-INS/IMUs/CG-5100.aspx >> >> SPAN is the "solution." SPAN-CPT puts the CPT IMU and the receiver in a >> single box. You could also get just the CPT in a box. >> >> The feature set enabled depends on the software keys that are loaded. >> Caveat emptor. >> >> Dual receiver (even if you have the hardware) and ALIGN feature are extra >> features. >> >> Also worth noting is that the circular connectors used on some of the >> hardware are pricey. Some are impossible to assemble without specialty >> tools. >> >> -- Christopher. >> 73 de AI6KG >> >> >> On Sat, Oct 7, 2017 at 2:36 PM, J. L. Trantham <jlt...@att.net> wrote: >> >>> Any idea what they are selling for at this time? >>> >>> I see that some sold for the BIN price of $349.99 up until June 20. After >>> that, 'Offer Accepted' occurred up through October 5, with a BIN price now >>> of $649.99, all plus $40 shipping. >>> >>> Joe >>> >>> -----Original Message----- >>> From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Gregory >>> Maxwell >>> Sent: Saturday, October 07, 2017 2:17 PM >>> To: Discussion of precise time and frequency measurement >>> Subject: [time-nuts] Novatel Dual frequency GNSS receivers on ebay >>> >>> There is an ebay listing for "Novatel GPS-702-GG with SPAN-CPT Single >>> Enclosure GNSS/INS Receiver + Cable" with a fairly large number available. >>> >>> This is a Novatel OEM628 dual frequency receiver (supports GPS, Glonass, >>> SBAS, apparently including L1C and L2C), plus a three fiber ring gyros >>> (with bias performance that blows away any mems gyro I've ever used) and an >>> 3-axis mems acceletrometer in an aluminum case, plus a decent dual >>> frequency antenna. This is a generation-ish old kit. >>> The industrial casing conspires to make it look somewhat less modern than >>> it actually is. >>> >>> The receivers have external clock input (though not plumbed to the outside >>> of the case) which appears to work though I didn't try much with it yet. >>> Mine came with 2013-ish firmware but easily upgraded to current (2016) >>> firmware. There is a windows based firmware update tool which talks to it >>> over serial and is very straight forward (The firmware update OEM6631.zip >>> can be found via google). >>> >>> You can communicate with them over serial in ascii, there is extensive >>> firmware documentation that goes over every command >>> https://www.novatel.com/assets/Documents/Manuals/om-20000129.pdf some of >>> which are specific to other modules. There is also a separate manual for >>> the inertial navigation specific features (NovAtel SPAN-CPT Users >>> manual.pdf) >>> >>> The external clock should allow you to hang it off a more stable >>> oscillator which will improve the stability of the GNSS results, and _I >>> presume_ improve the quality of the PPS output-- the firmware manual and >>> operating manual are thin on details, and mostly just go into telling you >>> how to adjust the kalman filter constants for different clock types. >>> >>> These also appear to support the novatel 'align' mode where you serial >>> connect two receivers separated by a short baseline and get really accurate >>> absolute headings; I'm planning on trying that that but haven't set it up >>> yet. >>> >>> Looks like uber (last position was ubers offices in denver) had a fleet of >>> these things. The couple I got run great, including the IMU, the antennas >>> obviously spent a long time outside, but work fine. The cable they come >>> with is weird, but I had no problem chopping one end off and figuring out >>> the pinout (see bottom). >>> >>> The novatel OEM6 is well supported by rtklib and I was able to get >>> post-processed positions very easily. >>> >>> Seller takes best offers a fair amount below the $649 asking price. >>> Looks like they may have another 30 or so of them. >>> >>> May be useful for doing time transfer especially with the clock input. >>> Just using it to get nice dual band observations to precisely survey an >>> antenna location for a traditional GPSDO may improve GPSDO performance by a >>> fair amount. >>> >>> Here is the signals and wire colors on the cables mine came with. >>> YMMV, I'd suggest not blindly trusting that colors match on other >>> units. These cables don't plumb out many of the signals from the >>> module (in particular, they don't carrying COM2, which is why I haven't >>> tried multi-receiver headings yet, since I'd need to figure out how to talk >>> to it over USB if com1 is in use for that), I'm unsure if they're wired >>> through the to external connector. >>> >>> 01 white power return (-) >>> 02 brown 9-18 VDC power input (+) >>> 03 yellow COM1 RS232 TX >>> 05 pink COM1 RS232 RX >>> 09 green COM1 GND >>> 10 black USB D+ >>> 11 purple USB D- >>> 12 yellow brnstp USB GND >>> 15 red ODO SIGA >>> 16 blue ODO SIGA-inv >>> 29 grey pinkstp PPS (high resistance? 80 ohm) >>> 30 whitw grnstp Event1 >>> 31 red blustp signal ground >>> _______________________________________________ >>> time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to >>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>> and follow the instructions there. >>> >>> _______________________________________________ >>> time-nuts mailing list -- time-nuts@febo.com >>> To unsubscribe, go to https://www.febo.com/cgi-bin/ >>> mailman/listinfo/time-nuts >>> and follow the instructions there. >>> >> _______________________________________________ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
