DM311 Beidou-III Small One-Way Communication Module

DM311Beidou-3SmallOne-WayCommunicationModuleTheDM311Beidou-3smallone-waycommunicationmodule(hereinafterreferredtoas"DM311module")isdevelopedbasedonthe"Dolphin-3"basebandchipindependentlydesignedbyJinweiElectronics.Itisequippedwitha5Wpoweramplifierandalow-noiseamplifier,andcanuseaone-wayantennaoraninductiveantennatoachieveregionalshortmessagecommunicationofBeidou-3.ItcanalsobecompatiblewiththeRDSSco..

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Product features

High integration density
Built-in PA, LNA and one-line communication circuit. With just one module, it can meet the requirements of both transmit and receive dual-path antennas as well as one-line communication antenna. The application scope is wider.
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 compatibility
The standard size is 30mm × 35mm. Most of the pins are the same as those of DM222, and the design is simple and easy to use.
Stable and reliable
It can be tested through network connection, and has been verified by numerous customers and in various environments in the industry. Its performance is more reliable.

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 - 130 dBm)
		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	6dBW~8dBW（5W power amplifier）
		Accuracy of transmission frequency	≤5×10-7
		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.
	Passive antenna interface	GNSS antenna	Connect to passive antenna (the insertion loss between the module and the antenna is ≤ 1 dB)
		S antenna	Connect to passive antenna (the insertion loss between the module and the antenna is ≤ 1 dB)
		L antenna	Connect to passive antenna (the insertion loss between the module and the antenna is ≤ 1 dB)
	One-line sky antenna interface	Feed voltage output range	+3V to +28V DC (input from VCC_PA_IN, with a maximum current support of 4A)
		receive gain	The S signal receiving end Pin 35 S_RFIN: Input gain 30-40 dB GNSS signal receiving end Pin 33 GN_RFIN: Refer to the requirements of the GNSS module
		transmitted power	-2dBm~2dBm
		switching mode	ALL_EN：Low level, enables the all-transceiver antenna, that is, ALL_RF is effective. ALL_EN：High level, enable the passive antenna, that is, Pin19 L_RFOUT, Pin35 S_RFIN, Pin33 GN_RFIN are effective.
	Power characteristics	Input from VCC_IN	Receiving working voltage: +3.6V to +5.5V. Recommended: 3.7V
		Input from VCC_PA_IN	Use passive antenna: Built-in 5W power amplifier is enabled. Operating voltage: +4.2V to +5.5V; Use a single-feed antenna: No PA required, operating voltage: +3V to +28VDC.
	Power dissipation	Operating power consumption: ≤ 200mA @ +3.7V
		Built-in 5W power amplifier output power consumption: ≤ 3.5A @ 5V
physical property	Structure size		30mm×35mm×3.5mm
	Encapsulation mode		Postal stamp hole
	Weight		≤10g
environmental index	Operating temperature		-40℃~+85℃
	Storage temperature		-40℃~+85℃