[time-nuts] Trimble Lassen sQ / iQ GPS Receivers (ReCap)

[Gregory Beat]

   Week Number Roll Over (WNRO)

   On April 6, 2019 there was a GPS week number rollover (WNRO) that
   affected all earlier GPS / Timing units in the world, regardless of
   manufacturer, that did not handle the New Epoch.

   In general, the receiver manufacturers did NOT update their 6 and
   8-channel GPS receivers from the 20th century.  In fact, many have
   exited theGPS receiver marketplace (merger, changing product lines, not
   competitive, bankruptcy, etc.).

   Owners of surplus Trimble Thunderbolt GPSDO (Red) and purchasers via
   the Time-Nuts Group know this situation, and that Lady Heather (WNRO
   adjustment) permitted their continued usage.
   ==

   On September 9, 2004 Trimble announced their new 12-channel Lassen iQ
   GPS receivers. This GPS receiver was fully compatible with Trimble’s
   earlier (and popular) Lassen sQ series.

   [1] https://investor.trimble.com/static-files/909a7dcf-fe1e-4cca-8fc0-7
   cdd83346833

   Trimble’s WNRO support statement (2017 Product Bulletin)

   regarding their Larsen SQ and IQ receivers.

   [2]https://trimble.app.box.com/s/h9c5l6jzb851ybjkp7jjkk77xk8mpo1d


   Trimble announced New Lassen iQ Firmware version 1.16

   May 16, 2006

   [3]https://xdevs.com/doc/Trimble/iQ/FIRMWARE%20DOWNLOADS/Lassen%20iq%20
   pb%205122006a.pdf


   Today, the Trimble Larsen sQ and iQ GPS receivers are End of Life
   (EOL).

   However, HEOL Design (France) designed and manufacture Trimble clone
   replacements, for older equipment designs that internally used these
   Trimble receivers (and address WNRO).

   [4]https://www.heoldesign.com/Trimble-Lassen-SK2-iQ-sQ-LP-ACE-clone-rep
   lacements-boards

   I hope that “fills in” the product history of the Trimble Lassen iQ
   receiver series.

   Thanks to HEOL, equipment using that receiver module can continue its
   useful life.

   greg beat, w9gb

   chicago

References

   1. https://investor.trimble.com/static-files/909a7dcf-fe1e-4cca-8fc0-7cdd83346833
   2. https://trimble.app.box.com/s/h9c5l6jzb851ybjkp7jjkk77xk8mpo1d
   3. https://xdevs.com/doc/Trimble/iQ/FIRMWARE DOWNLOADS/Lassen iq pb 5122006a.pdf
   4. https://www.heoldesign.com/Trimble-Lassen-SK2-iQ-sQ-LP-ACE-clone-replacements-boards