Mark, John, Bill, Tom, I received a number of off-line emails from you about the new Jackson-Labs Fury GPSDO, thanks much for your interest! Let me try to address all of your questions here, please excuse the long email. I am loosely associated with Jackson-Labs - it carries my name :) The Fury GPSDO is going through it's final stages of software development, the hardware has stabilized about two months ago and not changed since. We have about 10 units available from stock at this point. We are thinking of offering these to Time-Nuts members at a preferred price until sold out. The time-nuts special pricing we can offer is $750 for the single-oven AT-cut, and $1050 for the double-oven SC-cut OCXO both in single piece quantities. This includes a Trimble GPS antenna and the Fury PCB. Software upgrades will be available on our Website for free download. The next batch of Fury's will be inside metal enclosures, and will be more expensive. My personal recommendation is the double-oven SC-cut unit, the OCXO is so good that it virtually does not require any electronic temperature compensation (spec is 6.7E-012 per degree Celcius)! The single-oven OCXO unit is recommended to be operated in some form of enclosure. The software interface uses a subset of the HP/Symmetricom 58503B SCPI interface commands, which follows the SCPI Standard Version 1994.0. We added a number of propriatary commands to access and change loop control parameters, as well as OCXO current, temperature, UTC offset etc. The direct access to loop parameters such as IIR filtering, PI control, Aging, Tempco, OCXO-temp. and current, etc as well as logging of capture parameters to .txt files should allow Time-Nuts months of experimentation! Logged data such as OCXO temperature versus EFC-DAC etc can be directly viewed with Ulrich Bangerts fantastic plotter program. The remaining software development effort is focussing on achieving 100% compatibility with SatStat, and GSPCon, this has not quite finished yet, but the units' can be easily firmware-upgraded in the field via the serial port later. Here are the key features that separate the Fury from the competition in our opinion: * only <4.5W at 12V needed, allows simple Pb Battery backup * No spurs visible in phase plot when checking with TSC5120A; <-155dBc phase noise >1KHz * M12+ receiver, and double oven SC-cut OCXO for around $1K new small qty * No need for thermal insulation with Double Oven OCXO * Significantly better phase noise, ADEV, Power consumption etc than 58503B * 32-bit, 58Mips RISC processor running extremely fast RTOS * Sine Wave as well as CMOS outputs available in parallel * Access to internal loop parameters and easy data logging of capture results for stability tweaking and experimentation. * Alarm output. 1PPS output from either raw GPS or OCXO. 1PPS output can be set +-10us to UTC in 1ns steps * Configurable serial port 9600 - 115200 Baud. Secondary serial port allows full access to M12+ receiver via WinOncore12 * Two LCD and keypad options (16x2, or 20x4 LCD), 1 or 5 key's, or fully controlled via serial port Please send us your suggestions for product features or improvements! We would love to get feedback. Bye, Said
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