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→2024.01.05: GNSS antenna changes
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==2024.01.05: GNSS antenna changes==
==2024.01.05: GNSS antenna changes==
We would like to inform you that starting from February 2023, there will be a significant enhancement in the manufacturing process of our FMC130 devices. We will be transitioning to utilize Surface Mount Device (SMD) manufactured GNSS antennas, which will replace the existing Dual-In-line Package (DIP) technique.
We would like to inform you that starting from February 2024, there will be a change in the manufacturing process of our FMC130 devices. We will be transitioning to utilize Surface Mount Device (SMD) manufactured GNSS antennas, which will replace the existing Dual-In-line Package (DIP) technique.
{| class="wikitable"
{| class="wikitable"
|-
|-
| style="text-align: left; background: white;" |Change type
| style="text-align: left; background: white;" |Change type
| colspan="2" style="text-align: left; background: white;" |SLM320 modem firmware update.
| colspan="2" style="text-align: left; background: white;" | Mechanical part changes
|-
|-
| rowspan="2" style="width: 221px; text-align: left; background: white;" |Detailed description
| rowspan="2" style="width: 221px; text-align: left; background: white;" |Detailed description
| colspan="2" style="width: 908px; text-align: left; background: white;" |GNSS antennas performance haven’t changed for FMC130 device.
| colspan="2" style="width: 908px; text-align: left; background: white;" |Change of the manufacturing process, transition from Dual-In-line Package (DIP) to Surface Mount Device (SMD) process.
|-
|-
| style="text-align: left; background: white;" |Old version: <br> Dual-In-Line Package (DIP) manufactured antennas [[File:GNSS antenna Dual-In-Line Package (DIP).png|center]]
| style="text-align: left; background: white;" |Old version: <br> Dual-In-Line Package (DIP) manufactured antennas [[File:GNSS antenna Dual-In-Line Package (DIP) v1.png|center]]<br>
| style="text-align: left; background: white;" |New version: <br> Surface Mount Device (SMD) manufactured antennas [[File:GNSS antenna DSurface Mount Device (SMD).png|center]]
Antenna size: 25x25x4 mm<br>
Center frequency: 1575.42 MHz, 1602 MHz<br>
VSWR: <1.1<br>
Average Gain: -2.6 dB<br>
Return loss: <-25 dB<br>
| style="text-align: left; background: white;" |New version: <br> Surface Mount Device (SMD) manufactured antennas [[File:GNSS antenna DSurface Mount Device (SMD) v1.png|center]]<br>
Antenna size: 25x25x4 mm<br>
Center frequency 1575.42 MHz, 1602 MHz<br>
VSWR: <1.9<br>
Average Gain: -2.5 dB<br>
Return loss: <-9 dB<br>
|-
|-
| style="text-align: left; background: white;" |Change reasons
| style="text-align: left; background: white;" |Change reasons
| colspan="2" style="text-align: left; background: white;" |1. SMD manufactured antennas.<br> 2. Better GNSS performance
| colspan="2" style="text-align: left; background: white;" | Standardization of GNSS antennas throughout device portfolio and manufacturing efficiency improvements.<br>
|-
|-
| style="text-align: left; background: white;" |Release date
| style="text-align: left; background: white;" |Release date
| colspan="2" style="text-align: left; background: white;" |February, 2023.
| colspan="2" style="text-align: left; background: white;" |February, 2024.
|}
|}
| 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;" | During transition period clients might receive devices with previous DIP manufactured antennas. The transition period can last from February to June.
| colspan="2" style="width: 908px; text-align: left; background: white;" | During transition period clients might receive devices with previous DIP manufactured antennas. The transition period can last from February to June.
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. The new SMD GNSS antenna provides an equivalent track quality and performance level, as verified through testing. Testing results:
{| class="wikitable"
|+ Caption text
|-
! '''Device''' !! '''Antenna''' !! '''Avg. Difference from precise track [m]*'''
|-
| FMC130_211|| SMD|| 3.30
|-
| FMC130_264|| SMD|| 2.94
|-
| FMC130_351|| SMD|| 2.65
|-
| FMC130_476|| DIP|| 4.23
|-
| FMC130_640|| DIP|| 3.52
|}
* 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.
** Testing is done inside vehicle interior. Devices were placed on the carpet, with front passenger seat removed. It is worth noting that GNSS signal is heavily influenced by the exact location device(s) is(are) placed.
|-
|-
| style="text-align: left; background: white;" |Suggested implementation plan
| style="text-align: left; background: white;" |Suggested implementation plan