DM226 Beidou-3 Communication, Positioning and Command Module

DM226

TheDM226Beidou-3communicationpositioningcommandmodule(hereinafterreferredtoas"DM226module")isaBeidou-310Wshortmessagecommunicationpositioningcommandmoduledevelopedbasedonthe"Dolphin-3"basebandchipindependentlydesignedbyChangshaJinwei.ItcanachieveBeidou-3regionalshortmessagecommunication,andiscompatiblewiththeRDSScommunicationfunctionofBeidou-2.Atthesametime,ithascommandfunctions,enablingthe5000subo..

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Product features

Fully support the regional short message application of the Beidou-3 system
Support 1000-character communication Pass network testing The Beidou transmission power is adjustable
Strong anti-interference capability
It has the function of suppressing adjacent-frequency signal interference such as WIFI, Bluetooth and 4G, resulting in more stable performance.
High-capacity command function
Supports the command and relay transmission functions of Beidou, and can simultaneously receive information from up to 5,000 subordinate users.
Supports the One-Stop Interface, with flexible usage.
Supports passive antennas and one-line connection interfaces, enabling flexible implementation of integrated or split-type terminal designs.

Technical Index

performance index	Performance of RDSS	Receiving frequency point	Receive the outgoing signals from S1I and S2C, with the frequency range: 2491.75 MHz ± 8.16 MHz
		Receive sensitivity	S1I: When the signal power is -127.6 dBm, the bit error rate is: ≤ 1×10-5
			S2C: 24kbps information frame, bit error rate: ≤ 1×10-5 (signal power - 123.8 dBm)
			S2C: 16kbps information frame, bit error rate: ≤ 1×10-5 (signal power - 127.5 dBm)
			S2C: 8kbps information frame, bit error rate: ≤ 1×10-5 (signal power - 130dBm)
		Number of receiving beams	Beidou-2: 10; Beidou-3: 14
		Transmitting frequency point	Lf0：1615.68 MHz±4.08MHz
			Lf1 ：1614.26 MHz±4.08MHz
			Lf2 ：1618.34 MHz±4.08MHz
		Built-in power amplifier output power	9dBW~11dBW（10W power amplifier）
		Output power of the one-line connection	-2dBm~2dBm
		Accuracy of transmission frequency	≤5×10^-7
		Phase error of transmitted signal modulation	≤3°
		Number of subordinate users under command	5000
		Short message communication capacity	The maximum length of a single message for Beidou-2 is 120 Chinese characters.
			The maximum length of the regional message for Beidou-3 is 1,000 Chinese characters.
	RNSS performance	Receiving frequency point	B1I、B1C、L1C（GPS）
		Positional accuracy	Horizontal distance ≤ 6m (95%, HDOP ≤ 4), Elevation ≤ 8m (95%, VDOP ≤ 4)
		Test precision	0.2m/s（1σ）
		Positioning time	Cold start ≤ 60 seconds, Hot start ≤ 15 seconds
		Recapture time	≤5 seconds (95%, satellite signal interruption for 30 seconds)
		Receive sensitivity	Capture ≤ -135 dBm; Tracking ≤ -145 dBm
		Timing accuracy	≤200ns
	Performance requirements for the one-line connection interface	Voltage output range	+5V~+32VDC
		External antenna receiving gain	30dB~40dB
		External antenna transmission gain	40dB~42dB
		Switching mode	When the ALL_EN pin is at a high voltage level, it switches to a single-line output.
	Power characteristics	Receiving working voltage: +3.6V to +5.5V. Recommended: 3.7V
		Internal power amplifier operating voltage: +11.5V to +12.5V
	Power dissipation	Operating power consumption: ≤ 500mA @ +3.7V
		Built-in power amplifier output power consumption: ≤ 3.5A @ 12V
physical property	Structure size		60mm×55mm×9mm
	Encapsulation mode		Metal cavity
	Weight		≤50g
environmental index	Operating temperature		-40℃~+85℃
	Storage temperature		-40℃~+85℃