Hi Mike, The Lassen IQ is a little PCB mounted 12 channel receiver about half the size of a matchbox, which is intended for OEM applications. It's not easy to open to see what's inside. It uses tiny surface mount connectors to get signals in and out but there's no access to the oscillator if you want to use an external osc. It doesn't have a built in antenna so the performance depends on the external antenna connected to it. It seems to handle constellation changes quite well as far as I can see. The application info says it can be used for navigation as well as timekeeping.
It has 2 serial ports as well as a 1 pps output. One serial port is used to control and read it using Trimble's TSIP binary protocol. There is free DOS and Windows software available from Trimble to do this. The other port can be configured to use TSIP, NMEA or Trimble's own ASCII protocol called TAIP. I paid AU$70 about 2 years ago, which at the time was equivalent to about US$60. You could probably do better these days. I bought a bunch of old 6 channel VP Oncore receivers about a year ago on ebay for AU12 each. They are ideal for timing aplications and clocks. HTH, Morris > > These units look interesting. Do you mind if I ask some questions? > > 1. What kind of non-time keeping uses have you found for them? > > 2. How well do they work indoors? Do you have to be near a window? > What about inside a multi-story building? > > 3. How well do they handle constellation changes? Is there an abrupt > shift in position? > > 4. Have you ever taken the shield off and looked inside? If so, can > you see the crystal oscillator and tell whether it is a bare crystal > or a complete oscillator module? > > 5. How much do they cost? Do you know of any others that are > cheaper? > > Thanks for your help! > > Best Regards, > > Mike Monett > > _______________________________________________ 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.