The MLD system consists of a pair of units. MLD/T is a transmitter unit with a built-in mains (ac) power supply and integral mains lead (ac power cord) fitted with a plug. A POWER lamp indicates that the MLD/T is powered-up. A DATA lamp flashes clearly to indicate that that MIDI data is passing through.

Extended information

As normal, the MLD and MTR systems use regular 180— five-pin DIN connections for their conventional MIDI ports. In order to avoid inadvertent connection to standard MIDI ports, they use different connectors for their LINE ports. For the LINE connections, 240— (also known as 60—) five-pin DIN sockets are used. Our line driver systems are shipped with a pair of suitable 240— DIN plugs. Although the same kind of connectors are used for the two Line Driver systems, the MTR uses different pin assignments from the MLD. Cables for both units should be wired pin-to-pin (that is, pin1-to-pin1, pin2 to pin2, and so on). Unlike 180— DIN connectors, the pins of the 240— DIN plug are numbered in order, anti-clockwise as viewed from the mating side of the socket (solder side of male plug). Note: — is a degree sign.

Technical specifications

MLD/T LINE port pin-out

- TX COMPLEMENT (output of MLD/T)
- ditto (connected to pin 1 inside unit)
- SCREEN (optional)
- TX TRUE (output of MLD/T)
- ditto (connected to pin 4 inside unit)
MLD/R LINE port pin-out
- RX COMPLEMENT (input of MLD/R)
- ditto (connected to pin 1 inside unit)
- SCREEN (optional)
- RX TRUE (input of MLD/R)
- ditto (connected to pin 4 inside unit)
MTR/M LINE port pin-out
- RX COMPLEMENT (input of MTR/M)
- RX TRUE (input of MTR/M)
- SCREEN (optional)
- TX TRUE (output of MTR/M)
- TX COMPLEMENT (output of MTR/M)
MTR/S LINE port pin-out
- TX COMPLEMENT (output of MTR/S)
- TX TRUE (output of MTR/S)
- SCREEN (optional)
- RX TRUE (input of MTR/S)
- RX COMPLEMENT (input of MTR/S)
The connections to pins 4 and 5 in the MTR cable are also required to supply power to the MTR/S unit from the MTR/M.