Topcon versus TrimbleWhat are the differences between the following two types of GPS units?  I will be using both for RTK surveys without a base and the price difference is very significant.

1) Topcon Hiper SR Network Rover Kit (enabled with GGD 10Hz OaF files)

2) Trimble R10, internal 4110-470 Mhz radio

I have experience with the Trimble unit, but not with the Topcon.  Am I comparing apples to apples?

St. Paul, MN

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  • Vendor

    Apples to apples...yes, by design but not performance.  The Topcon SR can transmit via Bluetooth to another Receiver and act as a Base or a Rover.  The Trimble R10 has a Radio that does this (at a longer distance).  In short, you are comparing a really low-end GNSS receiver (Topcon) to a really high-end Receiver (Trimble).

    If I were you I would look into the Spectra Precision SP80.  This is a mid-range receiver, combining the best of Trimble, Ashtech and Spectra.  It works with Carlson and Spectra/TDS Survey Pro and receives all of the Constellations without any further upgrading in the future.  It has dual hot-swapable batteries and includes Z-Blade.  It also has an option for internal XDL Radios running a 2w.  The entire package will cost you half of the R10, around the same as the Topcon, but you'll be getting your money's worth.  

    Good luck to you.

    • Land Surveyor

      I use a CHC 900+. Is that a Trimble type clone? It's works really well. Not any down time.

  • Vendor


    Do you know that there is a online product database where you can compare these products, read case studies, view brochures and read reviews. Maybe this can help!,1808,2158

  • Vendor

    The short answer to your question is the Trimble is the latest released in the market. Has all the functionality that you can imagine, enclosed into one of the lightest weight units especially compared to what we are use to. Plus one of the big things is the xFill, which is like the navcom/john deere had in there units called RTK extend. It's when you would lose sats and normally go to a float solution the John  ]Deere sat called Starfire would pick up it's HD signal and keep you fixed for up to 15 mins. The specs show that Trimble is using the Omni Star sats to do the same thing. This technology was being promoted around 2004 by John Deere. Another strong point is the processors and the firmware features are as good as you can get these days....thats why it's more expensive. These units are built for global use  as well, where every kind of environment has been imagined. Now if you want to talk more specific about your area or projects you can call me  at 843.518.8488 Skip Farrow (this statement is not a sales pitch for Trimble or Topcon, it is from what I read from the specs).

    • Hi,

      I was told by the Trimble reps in Ireland that xfill works when the RTK correction signal is lost and not the rover receiver satellite fix signal loss. Is is not the case ?

      Co Down

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