Difference between revisions of "LMS-6 Radiosonde"
Paul Rixon (talk | contribs) (Initial entry, specs, some connectors, CPU/RF chip) |
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| − | == Overview == | + | ==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. | 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 == | + | ==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 | + | *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 | + | *Frequency tolerance +/-30ppm |
| − | * Mean TX Power 70.8mW (18.5dBm) | + | *Mean TX Power 70.8mW (18.5dBm) |
| − | * Emission Designator 16K8F1D | + | *Emission Designator 16K8F1D |
| − | * FSK with a maximum modulating frequency of 4.8 kHz | + | *FSK with a maximum modulating frequency of 4.8 kHz |
| − | * Emission 3dB BW +/-5.0 kHz | + | *Emission 3dB BW +/-5.0 kHz |
| − | * Emission 20dB BW +/-12.7 kHz | + | *Emission 20dB BW +/-12.7 kHz |
| − | * Omnidirectional antenna | + | *Omnidirectional antenna |
| − | * Main beam gain 2dBi | + | *Main beam gain 2dBi |
| − | * Horizontal Beamwidth 360 degrees | + | *Horizontal Beamwidth 360 degrees |
| − | * Vertical Beamwidth +84 degrees | + | *Vertical Beamwidth +84 degrees |
Source: https://apps.fcc.gov/els/GetAtt.html?id=121623&x=. | Source: https://apps.fcc.gov/els/GetAtt.html?id=121623&x=. | ||
| − | == Photos == | + | ==Photos== |
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| − | == Connectors == | + | ==Connectors== |
sens 1 - NC (7-pin) (baro?) | sens 1 - NC (7-pin) (baro?) | ||
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SP1 - 2x4pin 0.1 - tu U14 (SPI mem?) | SP1 - 2x4pin 0.1 - tu U14 (SPI mem?) | ||
| − | == Components == | + | ==Components== |
GPS - Trimble 63530-50 s/n 1190122906 | GPS - Trimble 63530-50 s/n 1190122906 | ||
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U3 - 72F324J6T6 - ST72324 - Main Microcontroller, ST7 series | 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) | U21 - TI/Chipcon CC1050 (TSSOP 24) | ||
| − | == Circuits == | + | ==Circuits== |
RF from CC to Ant1 - coming soon | RF from CC to Ant1 - coming soon | ||
Revision as of 01:58, 2 September 2020
The LMS-6 Radiosonde is a radiosonde manufactured by Lockheed-Martin Sippican, and used for meteorological sounding.
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.
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
Connectors
sens 1 - NC (7-pin) (baro?)
sens 2 - RH
sens 3 - standalone TC
sens 4 - RH TC
Card edge - 40-pin, looks like ISA spacing
J1 - 4 pin 0.1
- 1 - Black
- 2 - White
- 3 - Red
- 4 - NC
J4 - NC - earphone jack? uses SENS3 leads
J5 - 4-pin 0.1 - to U3 (STM)
SP1 - 2x4pin 0.1 - tu U14 (SPI mem?)
Components
GPS - Trimble 63530-50 s/n 1190122906
https://www.trimble.com/embeddedsystems/copernicus2.aspx
U3 - 72F324J6T6 - ST72324 - Main Microcontroller, ST7 series
U13 LMV761
U21 - TI/Chipcon CC1050 (TSSOP 24)
Circuits
RF from CC to Ant1 - coming soon
