Re: [time-nuts] Thunderbolt GPS rollover

2012-06-06 Thread Robert Watzlavick.com
Onboard gps units tend to drop out at high altitude and/or high velocities due to COCOM limits. Some will re-acquire at apogee but it doesn't always work. I'm planning for onboard telemetry but a multilateration system is the backup. I correspond with others on aRocket and unrestricted gps

Re: [time-nuts] Thunderbolt GPS rollover

2012-06-06 Thread Robert Watzlavick.com
I poked around a bit on that site-I'll check it out more tomorrow. My vehicle is a liquid so acceleration will be lower than a solid. Max velocity will still be ~ mach 2 and max altitude will be over 100k ft. The successful recovery rate with large amateur liquids is very low so every idea

Re: [time-nuts] 58536A splitter and 9390-6000 GPS

2011-05-20 Thread Robert Watzlavick.com
I thought the 58536A was supposed to provide a load to the other receivers for that reason. But now that I look at the datasheet more closely, that feature may only be available for the 58537. -Bon On May 20, 2011, at 7:25 AM, paul swed paulsw...@gmail.com wrote: It may need a resistor to

Re: [time-nuts] Lady Heather Question

2011-05-02 Thread Robert Watzlavick.com
Assuming the vertical scale doesn't change, there should be no change to a particular trace as it scrolls across the screen, even if there is more than one sample per pixel. That's where a peak detect plotting algorithm helps out. Imagine an ink pen plot of some signals then stand back about 10

Re: [time-nuts] STP2145A

2011-03-08 Thread Robert Watzlavick.com
Murray, Thank you very much for the datasheet. That confirms my suspicion about what was posted on eBay. For my application I actually need the 5V control voltage because I'm planning on using it with my Datum bc635PCI and TS2100. It's way too large for either unit but for the PCI card I can