The baud rates 38400 or 115200 must be the internal ones with which the on-board electronics is communicating with the radio, this is faster than what the radio can transmit.
I assume that UR-1 means a Topcon radio.
Depending on your frequency and bandwidth you may have different options.
25 khz bandwidth max radio transmit rate is as long as I know 9600 baud
with 12.5 khz Trimble receivers have a mode with 8000 baud, but Topcon may be limited to 4800 baud.
The Topcon radio maybe more or less autoconfigure. Means you need to try different options on your base and see if the machine receives data.
With so low baud rates and nowadays dozens of visible satellites you may have to turn off tracking of satellites/constellations. 4800 baud is basically just 500 bytes per second and RTCM 3 is a rather space consuming protocol. I've had issues even with 9600 baud and RTCM 3. This is no issue via mobile connection, since that one isn't limited to 9600 baud, but with radio.
First thing I'd try is to call the imachine support and get as much information about the onboard components as possible, make, manuals and supported protocols
Otherwise, your best bet is to start transmitting
- GPS/Glonass only, try increasing afterwards
- try to find out what the onboard receiver support, no point in transmitting more than is supported and convoluting the limited baud rate
- with Satel or PDL radio protocol
- at 4800 baud only, try to increase afterwards
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Ronny Schneider
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Original Message:
Sent: 05-05-2026 13:21
From: Cliff Vandergrifft
Subject: Re: Using R10 as a base for machine control using Topcon Rovers, is this possible?
I am trying to use a 450mhz base with RTCM 3.x with an iMachine. Do you know the setting the iMachine has to be set to? I tried Radio Type UR-1 (UHF) but the only Baud rate the machine has listed is 38400 or 115200. I could not get it to work. Any help would be appreciated.
Cliff
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Cliff Vandergrifft
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Original Message:
Sent: 06-10-2020 07:58
From: Filip Slavnic
Subject: Re: Using R10 as a base for machine control using Topcon Rovers, is this possible?
Topcon should normally use Trimtalk, at least we use our SPS bases when we have Topcon machine on site. Also corrections should be RTCM 3.X.