Potential GLONASS Reception Failure

Discussion related to the Garmin Oregon 7x0 series GPSr
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GPSrChive
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Potential GLONASS Reception Failure

Post by GPSrChive »

There have been multiple reports by users of the GPSMAP 64 series (non 'x') and the eTrex Touch 25/35 series indicating complete failure to obtain GLONASS satellite signals. These devices all use the same MediaTek MT3332N GNSS chipset.

The Oregon 6x0, 7x0 and Rino 75x also use this GNSS chipset.

Anyone having any GLONASS reception issues with those yet?
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Wojtas81
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Re: Potential GLONASS Reception Failure

Post by Wojtas81 »

Oregon 700, firmware 6.00

GPS + GLONASS + WAAS/EGNOS - works flawlessly
Oregon 700 satellite page
oregon700.bmp
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GPSMAP 66sr, GPSMAP 64sx, Montana 680t, Oregon 700, eTrex 30
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javawa
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Re: Potential GLONASS Reception Failure

Post by javawa »

It does work fine on my Oregon 700 too. I'm using only GPS though, GLONASS has no added value for me.
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Wojtas81
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Re: Potential GLONASS Reception Failure

Post by Wojtas81 »

javawa wrote: Mon Aug 03, 2026 3:22 pm...GLONASS has no added value for me.
In good conditions yes. But when conditions worsens (eg. tall buildings), adding GLONASS increases accuracy and stability (less drifting) for me.
Fortunately Oregon 700 works as expected, but I am frustrated that GLONASS is suddenly gone for other devices (eg. Montana 610/680).
GPSMAP 66sr, GPSMAP 64sx, Montana 680t, Oregon 700, eTrex 30
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