MiPro MRM-DR70B Multi Channel Diversity Receiver

MiPro MRM-DR70B Multi Channel Diversity Receiver. Multi-channel ACT wireless diversity receiver module compatible with Mipro MA-705, Mipro MA-707, Mipro MA-708 and Mipro MA-808 portable PA units. Easy to install, the module simply slides into the receiver slot and fixes in place. Easy to tune using Auto-Scan and ACT, please ensure a matching ACT transmitter on DR70B is purchased. Deregulated band DR70 (863-865MHz) Channel 70 for license-free UK use, Pre and Post the digital switchover.

Features

Press "SCAN" Button to auto-scan and look for one of the interference free receiver channels
Press the "ACT" button syncs the receiver and transmitter frequencies automatically
Bright and easy-to-read LED displays numeric channel and RF and AF strengths
Receiver "Sensitivity" can be sensitivity adjusted to prevent interference
Reliable true diversity reception with dual "Pilotone & Noise Lock" circuit prevents interferences
Modular design allows easy installation, maintenance and DIY

Specifications

Frequency Range: 863 -865 MHz
Oscillation Mode: PLL Synthesized
Bandwidth: 24MHz
Receiving Mode: CPU - Controlled Diversity Receiving
Squelch Control: Innovative "1KHz Pilotone & Noise Lock" dual squelch circuit
Display Status: Noise indicator clearer display if a receiver is under the state of interference
Sensitivity: dBuV, at S/N>80dB
Max Deviation Range: 68KHz
Spurious Emissions: <82dB
Frequency Response: 60Hz - 15KHz (Overall System)
S/N Ratio: >100 dBA
T.H.D: <0.5% @1KHz (Dev.=40KH)
AF Output: 610mV RMS
Power Supply: DC 12 - 15V
Current Consumption: <190 mA
Working Temperature: -10C - 60C
Dimensions: (W/H/D) 75 x 35 x 141mm (3" x 1.4" x 5.6")

Channel 70 Plan

CH 1	CH 2	CH 3	CH 4	CH 5	CH 6	CH 7	CH 8
863.300	863.900	864.800	863.225	863.725	864.475	863.250	863.750
*	*	*	Group A	Group A	Group A	Group B	Group B
CH 9	CH 0	CH A	CH B	CH C	CH D	CH E	CH F
864.525	863.275	863.775	864.550	863.100	863.525	864.325	864.900
Group B	Group C	Group C	Group C	**	**	**	**

All frequencies within DR70 are deregulated for license-free use.

Due to the nature of this band we cannot guarantee completely interference-free use in all areas. Care should be taken during setup to ensure the clearest channel is selected

Notes:

Channels marked * are the standard fixed frequencies currently available for MIPRO UK UHF systems

Channels marked ** are random frequencies chosen only to give the user alternative channels to use in cases of interference.

As the deregulated band is so small there are some caveats to operating more than one transmitter/ receiver.

It is not possible to run more than 3 systems in this band.

Groups of 3 that will work together are shown above as Group A / B / C

Caveats to operation when using multiple transmitters :

Group A: Minimum distance between transmitters to achieve 3 units with interference-free operation is 2 metres

GroupB: Minimum distance between transmitters to achieve 3 units with interference-free operation is 5 metres

GroupC: Minimum distance between transmitters to achieve 3 units with interference-free operation is 2 metres

GroupA: If only 2 units are required then use CH3 and CH4 or CH3 and CH5 (No minimum distance restriction).

GroupB: If only 2 units are required then use CH6 and CH7 or CH6 and CH8 (No minimum distance restriction).

GroupC: If only 2 units are required then use CH9 and CHA or CH9 and CHB (No minimum distance restriction).

Please note that the MRM DR70B uses a 1KHz Pilot Tone key so cannot guarantee correct operation with older Transmitter - to be safe please use Transmitters that are listed / shown below in the related items.

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