MCTR91508
8-Channel, 915MHz Receiver with Frequency Hopping

Description

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

The receivers use a selective digital coding called Multicode Technology. A fixed code is set using the 12-way dipswitch and during reception the code is received over several different frequencies.

The SMA Antenna Socket should be connected as shown in the picture below.

Antenna
The transceiver has a 50 ohms SMA connector to allow a proper 915MHz antenna to be connected. Elsema stocks the ANT915S-SMA suitable for connection to the transceiver. See picture below.

Different Relay Output Modes

The 4-Way dip switch sets the relay output modes. See the table below for the different modes.

DIP Switch Mode Settings The output relay will respond in the following manner when receiving the correct signal from a transmitter
	"All Momentary": Relay on, only while correct signal is received
	"All Flip-Flop": Outputs alternate at every correct incoming signal
	"Momentary & Flip-Flop": Outputs 1-4 are momentary & 5-8 are flip-flop
	"Latching on": Outputs will be on until supply to receiver is momentarily interrupted
	"Momentary & Flip-Flop": Outputs 1-6 are momentary & 7-8 are flip-flop
	"Momentary & Flip-Flop": Outputs 1-2 are momentary & 3-8 are flip-flop
	"Momentary & Flip-Flop": Outputs 1-3 are momentary & 4-8 are flip-flop
	"Latching on": Output 1 is latching & 2-8 are momentary

* Dipswitch 4 is reserved

Customised Softwares

Customer specific programs can be written to do special applications.

Program example :
MCTR91508V032.hex : Default, the above relay modes are included with this software.
MCTR91508BoxR01V01.hex :  This program has Relay 4 switch “on” when power is supplied to the receiver.

A programming fee applies to a custom written software. 

Case
The MCTR91508SS or MCTR91508R can be supplied without a case, this allows the receiver to be integrated according to your needs.
The C160 case and QM100 mounting bracket can be used to enclose the MCTR91508SS receiver. The receiver with a case is known as a MCTR91508SSE. The MCTR91508R only needs the C160 case to be a MCTR91508RE. E is Enclosed.

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 MCTR91508SS receiver.

If the MCTR91508SS 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

Products in the Range

Block Diagram

MCTR91508SS

Application Notes (MCTR91508SS)

Care should be taken with the solid-state outputs that they are protected from inductive loads. This is done by connecting diodes across your DC inductive load.

Inductive loads such as DC relays must be clamped with a diode across the relay coil. If this is not done the spikes generated by the DC relay will lock-up the receiver. When a lock-up occurs you will need to remove the power and re-connected it.

MCTR91508R