Difference between revisions of "GEM1305"

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'''GEM1305-4540A00'''
== GEM1305-4540A0 ==
[[File:buynow.png|100px|left|frameless|link=https://www.datagnss.com/products/gem1305]]
<br>


[[File:GEM1305-1-v2.png|450px|thumb|GEM1305 dual-band RTK smart antenna]]
__NOTOC__
 
GEM1305 is a high performance dual-band RTK module with build-in antenna, which is based on CYNOSURE series chipset. <br>It supports BDS-3
GEM1305 is a high performance dual-band RTK module with build-in antenna, which is based on [[TAU1312]]. <br>It supports BDS-3
signals, along with global civil navigation systems, including GPS, BDS, GLONASS, Galileo, QZSS,
signals, along with global civil navigation systems, including GPS, BDS, GLONASS, Galileo, QZSS,
and SBAS.
and SBAS.


[[File:GEM1305-uav-00.png|500px|frameless|GEM1305 dual-band RTK smart antenna]]


'''Feature'''
=== Feature ===
* Supports GPS, BDS, GLONASS, Galileo, QZSS, and SBAS
* Supports GPS, BDS, GLONASS, Galileo, QZSS, and SBAS
* Integrated Real Time Kinematics (RTK)
* Integrated Real Time Kinematics (RTK)
Line 14: Line 16:
* Supports multi-band multi-system high precision raw data output, easy for 3rd party integration
* Supports multi-band multi-system high precision raw data output, easy for 3rd party integration
* The best cost-effective high precision GNSS positioning solution integrated with antenna
* The best cost-effective high precision GNSS positioning solution integrated with antenna
* Compact size 45*45*15mm with high performance
* Compact size 55*55*15mm with high performance


{| class="wikitable"
|-
! P/N
! Details
|-
| GEM1305-4540A00
| Based on CYNOSURE III GNSS SoC
|-
| GEM1305-4540A01
| Based on CYNOSURE IV GNSS SoC
|}


'''Specifications'''
[[File:GEM1305-4540-A0-MAIN-02-720x548.png|400px|frameless|GEM1305 dual-band RTK smart antenna]]


=== Specifications ===
==== Antenna ====
{| class="wikitable"
{| class="wikitable"
|-
|-
Line 53: Line 69:
| Dimensions(mm) || 55 x 55 x 13  
| Dimensions(mm) || 55 x 55 x 13  
|-
|-
| Weight (g)|| 85g
| Weight (g)|| 50g
|}
 
==== GNSS ====
 
{| class="wikitable"
|-
! style="background-color:#9b9b9b;" | Parameter
! colspan="3" style="background-color:#9b9b9b;" | Specifications
|-
| Constellations
| colspan="3" | BDS, GPS, QZSS, GLONASS, Galileo, NavIC, SBAS
|-
| Channel
| colspan="3" | 128
|-
| Update rates
| colspan="3" | 10Hz
|-
| rowspan="3" | Position accuracy
| colspan="2" | GNSS
| 1.0m CEP
|-
| colspan="2" | SBAS
| ＜1.0m CEP
|-
| colspan="2" | RTK
| 1.0 cm + 1 ppm (H)<br />2.0 cm + 1 ppm (V)
|-
| rowspan="2" | Velocity & Time accuracy
| colspan="2" | GNSS
| 0.05 m/s CEP
|-
| colspan="2" | 1PPS
| 20ns RMS
|-
| rowspan="2" | TTFF
| colspan="2" | Hot start
| 1s
|-
| colspan="2" | Cold start
| 27s
|-
| rowspan="2" | RTK
| colspan="2" | Convergence time
| <10s
|-
| colspan="2" | Reliability
| ＞99.9%
|-
| rowspan="4" | Sensitivity[1]
| colspan="2" | Cold start
| -148 dBm
|-
| colspan="2" | Hot start
| -155 dBm
|-
| colspan="2" | Reacquisition
| -158 dBm
|-
| colspan="2" | Tracking & navigation
| -165 dBm
|-
| rowspan="2" | Protocol
| colspan="3" | NMEA-0183
|-
| colspan="3" | RTCM 2.X, RTCM 3.X
|-
| Baudrate
| colspan="3" | 230400 bps, by default
|-
| rowspan="3" | Operating condition
| colspan="2" | Main supply
| 5V
|-
| colspan="2" | Digital I/O supply
| 1.75V to 3.63V
|-
| colspan="2" | Backup supply
| 1.62V to 3.63V
|-
| rowspan="4" | Power consumption
| rowspan="2" | Tracking
| GNSS
| 30 mA @ 3.3V
|-
| Single system
| 18 mA @ 3.3V
|-
| rowspan="2" | Standby
| Data backup
| 16 uA
|-
| RTC
| 1.4 uA
|-
| rowspan="3" | Serial interface
| colspan="2" | UART
| 2
|-
| colspan="2" | SPI[2]
| -
|-
| colspan="2" | I2C[2]
| -
|-
| rowspan="2" | Operating limit
| colspan="2" | Velocity
| 515 m/s
|-
| colspan="2" | Altitude
| 18,000m
|-
| rowspan="3" | Environmental conditions
| colspan="2" | Operating temp.
| -40°C to +85°C
|-
| colspan="2" | Storage temp.
| -40°C to +90°C
|-
| colspan="2" | Humidity
| 95% RH
|}
|}
[1] tested with a good external LNA


[2] Supported upon request with special firmware


'''Hardware Description'''
=== Hardware Description ===


[[File:GEM1305-V2-6s.png|500px|frameless|GEM1305 dual-band RTK smart antenna]]
[[File:GEM1305-main-a1.png|500px|frameless|GEM1305 dual-band RTK smart antenna]]


Pitch connector 2.54mm (left side of above picture)
CON_0(J6): 1.25mm pitch 6P connector
* 3.3V
Pinout:
* GND
* NC
* NC
* Tx, TTL level of GNSS module
* Rx0 of GNSS module
* Rx, TTL level of GNSS module
* Tx0 of GNSS module
* GND
* 5V, input,max current:200mA
This 2.54 pitch connector is the input/output data connector, support power supply 3.3v for external module like Bluetooth, Radio.
 


Connector JST 1.25 5pin / 2.54 pitch connector is the main power supply and input/output connector:
CON_1(J5): Pin header connector 2.54mm
* GND
* GND
* NC
* NC
* RX,TTL level of GNSS module
* Tx1 of GNSS module
* TX,TTL level of GNSS module
* Rx1 of GNSS module
* 5V, input,max current:200mA
* 5V
 
'''UART0 can be used for firmware upgrade, while UART1 cannot.'''
 
=== Case study ===
 
[https://ardupilot.org/copter/docs/common-datagnss-gem1305-rtk.html GEM1305 for Ardupilot]
 
=== Package list ===
* GEM1305 receiver
* USB-to-Serial test cable (CH340-based,Red:5V Black:GND Green:Tx White:Rx)
* 6P 1.25mm cable
 
[[File:GEM1305-cable.png|200px|frameless|GEM1305 usb-to-serial cable]]


=== Design files ===
*[[File:GEM1305-2D-Drawing.pdf | GEM1305 2D drawing]]


'''Related Documents'''
=== Related Documents ===
*[[Quickguide]]
*[[Satrack Quickguide]]
*[[Allystar_GNSS_Protocol]]
*[[Allystar_GNSS_Protocol]]


Latest revision as of 10:45, 5 November 2024

GEM1305-4540A0

Buynow.png



GEM1305 is a high performance dual-band RTK module with build-in antenna, which is based on CYNOSURE series chipset.
It supports BDS-3 signals, along with global civil navigation systems, including GPS, BDS, GLONASS, Galileo, QZSS, and SBAS.

GEM1305 dual-band RTK smart antenna

Feature

  • Supports GPS, BDS, GLONASS, Galileo, QZSS, and SBAS
  • Integrated Real Time Kinematics (RTK)
  • State-of-the-art low power consumption design
  • Supports multi-band multi-system high precision raw data output, easy for 3rd party integration
  • The best cost-effective high precision GNSS positioning solution integrated with antenna
  • Compact size 55*55*15mm with high performance
P/N Details
GEM1305-4540A00 Based on CYNOSURE III GNSS SoC
GEM1305-4540A01 Based on CYNOSURE IV GNSS SoC

GEM1305 dual-band RTK smart antenna

Specifications

Antenna

Item Specs
Frequency Range(MHz) GPS/QZSS L1,L5, BDS B1,B2,
GLONASS L1, GALILEO E1/E5a
Polarization Right-hand circular
Gain(dBi) 90° L1≥5.5 L2≥5 L5≥2.5
Phase center error(mm) ≤±2.0
Axial Ratio (dB) 90°≤3.0
LNA Gain(dB) 38±2
V.S.W.R ≤2.0
Noise Figure (dB) ≤1.8
DC Voltage (V) 5.0～5.5
Current (mA) ≤80mA
Impedance(Ω) 50
Relative Humidity 95%
Operating Temperature(℃) -40～+85
Storage Temperature (℃) -55～+85
Dimensions(mm) 55 x 55 x 13
Weight (g) 50g

GNSS

Parameter Specifications
Constellations BDS, GPS, QZSS, GLONASS, Galileo, NavIC, SBAS
Channel 128
Update rates 10Hz
Position accuracy GNSS 1.0m CEP
SBAS ＜1.0m CEP
RTK 1.0 cm + 1 ppm (H)
2.0 cm + 1 ppm (V)
Velocity & Time accuracy GNSS 0.05 m/s CEP
1PPS 20ns RMS
TTFF Hot start 1s
Cold start 27s
RTK Convergence time <10s
Reliability ＞99.9%
Sensitivity[1] Cold start -148 dBm
Hot start -155 dBm
Reacquisition -158 dBm
Tracking & navigation -165 dBm
Protocol NMEA-0183
RTCM 2.X, RTCM 3.X
Baudrate 230400 bps, by default
Operating condition Main supply 5V
Digital I/O supply 1.75V to 3.63V
Backup supply 1.62V to 3.63V
Power consumption Tracking GNSS 30 mA @ 3.3V
Single system 18 mA @ 3.3V
Standby Data backup 16 uA
RTC 1.4 uA
Serial interface UART 2
SPI[2] -
I2C[2] -
Operating limit Velocity 515 m/s
Altitude 18,000m
Environmental conditions Operating temp. -40°C to +85°C
Storage temp. -40°C to +90°C
Humidity 95% RH

[1] tested with a good external LNA

[2] Supported upon request with special firmware

Hardware Description

GEM1305 dual-band RTK smart antenna

CON_0(J6): 1.25mm pitch 6P connector Pinout:

  • GND
  • NC
  • Rx0 of GNSS module
  • Tx0 of GNSS module
  • 5V, input,max current:200mA


CON_1(J5): Pin header connector 2.54mm

  • GND
  • NC
  • Tx1 of GNSS module
  • Rx1 of GNSS module
  • 5V

UART0 can be used for firmware upgrade, while UART1 cannot.

Case study

GEM1305 for Ardupilot

Package list

  • GEM1305 receiver
  • USB-to-Serial test cable (CH340-based,Red:5V Black:GND Green:Tx White:Rx)
  • 6P 1.25mm cable

GEM1305 usb-to-serial cable

Design files

Related Documents

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