59
edits
Changes
→Components: Added U13 information
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== Overview ==
There are two models of the LMS-6, a 403MHz model and a 1680MHz model. This article will cover the 403MHz model unless specified.
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== Specs ==
* 16 Fixed transmit carrier frequencies (MHz): 400.250, 400.625, 401.000, 401.375, 401.750, 402.125, 402.500, 402.875, 403.250, 403.625, 404.000, 404.375, 404.750, 405.125, 405.500, 405.875* Frequency tolerance +/-30ppm* Mean TX Power 70.8mW (18.5dBm)* Emission Designator 16K8F1D* FSK with a maximum modulating frequency of 4.8 kHz* Emission 3dB BW +/-5.0 kHz* Emission 20dB BW +/-12.7 kHz* Omnidirectional antenna * Main beam gain 2dBi* Horizontal Beamwidth 360 degrees* Vertical Beamwidth +84 degrees
Source: https://apps.fcc.gov/els/GetAtt.html?id=121623&x=.
== Photos ==
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== Connectors ==
sens 1 - NC (7-pin) (baro?)
SP1 - 2x4pin 0.1 - tu U14 (SPI mem?)
== Components ==
GPS - Trimble 63530-50 s/n 1190122906
U3 - 72F324J6T6 - ST72324 - Main Microcontroller, ST7 series
U13 [https://www.ti.com/lit/ds/symlink/lmv761.pdf LMV761]<!-- Package marking shows C22A. TI Part marking lookup provides LMV761. The SOT-23 footprint appears to match what is on the PCB. -->
U21 - TI/Chipcon CC1050 (TSSOP 24)
== Circuits ==
RF from CC to Ant1 - coming soon