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FMT100 Product Change Notifications (view source)
Revision as of 16:54, 25 October 2023
, 16:54, 25 October 2023→2023.10.25: GNSS antenna changes
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==2023.10.20: GNSS antenna changes==
==2023.10.25: GNSS antenna changes==
We would like to inform you about the GNSS antenna change for FMT100 starting from October 2023.
We would like to inform you about the GNSS antenna change for FMT100 starting from October 2023.
| rowspan="2" style="width: 221px; text-align: left; background: white;" |Detailed description
| rowspan="2" style="width: 221px; text-align: left; background: white;" |Detailed description
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|-
| style="text-align: left; background: white;" |Old version: [[File:OldantennaFMT100.png|600px]]
| style="text-align: left; background: white;" |Old version: [[File:FMT35.jpg]]
<br>
<br> Antenna size: 35x35x3 mm
<br>
<br> Center frequency: 1575.42 MHz, 1602 MHz
<br>
<br> VSWR: <1.8
<br>
<br> Average gain: -1.3 dB
| style="text-align: left; background: white;" |New version: [[File:NewantennafMT100.png|600px]]
<br> Return loss: < -14 dB
| style="text-align: left; background: white;" | New version: [[File:FMT25.jpg]]
<br> Antenna size: 25x25x4 mm
<br> Center frequency: 1575.42 MHz, 1602 MHz
<br> Center frequency: 1575.42 MHz, 1602 MHz
<br> VSWR: <1.2
<br> VSWR: <1.2
<br> Average Gain: -1.2 dB
<br> Average Gain: -1.2 dB
<br> Peak Gain: < 3.3 dBi
<br> Return loss < -29 dB
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| style="text-align: left; background: white;" |Change reasons
| style="text-align: left; background: white;" |Change reasons
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| style="width: 221px; text-align: left; background: white;" |Risk assessment
| style="width: 221px; text-align: left; background: white;" |Risk assessment
| colspan="2" style="width: 908px; text-align: left; background: white;" |Since the change of the GNSS antenna is visible visually on PCB, in order to avoid problems at the customs of certain countries, we suggest informing the relevant authorities about the change of the GNSS antenna as soon as possible. The new GNSS antenna provides an equivalent track quality and performance level, as verified through testing.
| colspan="2" style="width: 908px; text-align: left; background: white;" |Since the change of the GNSS antenna is visible visually on PCB, in order to avoid problems at the customs of certain countries, we suggest informing the relevant authorities about the change of the GNSS antenna as soon as possible. The new GNSS antenna provides an equivalent track quality and performance level, as verified through testing. Testing results:
{| class="wikitable" style="text-align:center; background-color:#ffffff;"
|- style="font-weight:bold;"
! style="color:#000000;" | Device
! Antenna
! Mounting conditions*
! style="color:#000000;" | Avg. Difference<br /> from precise track** [m]
|-
| style="color:#000000;" | FMT100_162
| New
| Excellent
| style="color:#000000;" | 2,59
|-
| style="color:#000000;" | FMT100_745
| Old
| style="background-color:#FFF;" | Excellent
| style="color:#000000;" | 4,43<br />
|-
| style="color:#000000;" | FMT100_170
| New
| Good
| style="color:#000000;" | 3,45
|-
| style="color:#000000;" | FMT100_937
| Old
| Good
| style="color:#000000;" | 4,68
|-
| style="color:#000000;" | FMT100_238
| New
| Normal
| style="color:#000000;" | 3,93
|-
| style="color:#000000;" | FMT100_705
| Old
| Normal
| style="color:#000000;" | 4,92
|-
| style="color:#000000;" | FMT100_071
| New
| style="background-color:#FFF;" | Poor
| style="color:#000000;" | 4,98
|-
| style="color:#000000;" | FMT100_638
| Old
| Poor
| style="color:#000000;" | 5,05
|}
'''*'''''Mounting conditions'' - device position under the hood from a poor location (thick metal layer above device) to an excellent location (thin metal layer above device) <br>
'''**'''''Avg. Difference from precise track'' - measured by comparing positioning data from devices and RTK (Real-time kinematic positioning) system data which is considered precise data. The smaller avg. difference from precise track, means better track quality.
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|-
| style="text-align: left; background: white;" |Suggested implementation plan
| style="text-align: left; background: white;" |Suggested implementation plan