MCT91508
8-Channel, 915MHz Transmitter with Frequency Hopping

Description

The transmitter uses frequency hopping to allow multiple transmitters to be used in close proximity with no interference or jamming. This technology is usually used in very expensive equipment and military applications. Elsema has developed a world first low cost hand held frequency hopping transmitter.

The transmitter uses a selective digital coding called Multicode Technology. A fixed code is set using the 12-way dipswitch and during transmission the code is transmitted over several different frequencies.

12-Way Dipswitch Setup Instructions

To program the transmitter to the receiver you simply match the transmitter and receiver dipswitches. To prevent other transmitters triggering your receiver make sure that the first 8 dip switches are different on the two separate systems.

More advanced programming features

Dip switch 9, 10, 11 and 12 will determine the position of the first channel on the Multicode transmitters and receivers. Other channels are sequentially placed.

Example 1:
Using an 8-channel MCTR91508 receiver.

If the MCTR91508 has 0101 0100 1000 set to the 12 way dipswitch, this sets the receiver first relay (Ch.1) to position 9 i.e. 1000. The other channels are sequentially placed. This is shown in the table below:

To program a 2-channel MCT91502 transmitter to the receiver relay channel 7 and 8 you need to set the 2 channel transmitters dip switch to 0101 0100 1110.

To program a 1-channel MCT91501 transmitter to receiver relay channel 3 you need to set the transmitters dip switch to
0101 0100 1010.

Example 2:
Using two separate 2-channel MCTR91502 receiver coded to one 4-channel MCT91504 transmitter.

If one of the MCTR91502 receiver has 0011 1100 1000 set to the 12-way dipswitch, this sets the receiver first relay (Ch.1) to position 9 i.e.  1000. The second relay (Ch.2) is sequentially placed to position 10 i.e. 1001.

Set the second MCTR91502 receiver to 0011 1100 1010 (position 11). Again, the other relay channel is sequentially placed to position 12 i.e. 1011.

Set the four channel MCT91504 transmitter to 0011 1100 1000.  This sets the transmitters first button (Ch.1) to position 9 i.e. 1000. The other channels are sequentially placed i.e. button 2 is position 10, button 3 is position 11 and button 4 is position 12.

Technical Data