User manual SMART DEVICES DM-6 INSTALLATION

[. . . ] If the digital processor no longer sees a valid digital signal or timecode, then it will tell the DM-6 to go to Optical mode. If the digital processor or DM-6 fails but does NOT automatically go into optical mode, then the operator needs to push the optical button on the DM-6 front panel. If this still does not correct the problem, then the operator must throw the toggle switch on the DM-6 front panel to the bypass position. This will force the DM-6 into optical mode regardless of what the lighted pushbuttons are telling you. The input card has two sets of input level controls for each of two digital sources. [. . . ] TRhe OPTICAL button may be pressed to return to the backup optical soundtrack when necessary. Additional digital inputs are provided for other systems. The signals are connected to the individual terminals of the barrier strip. The DB25 for the DA20 is wired in parallel with the input terminal strips. 4 DM6-DA20/1 DB25 on DM6 end to 2 DB25 on DA20 end. This cable set allows easy plug-in o p eration. The 2 DB25's on the DA20 end plug into the Audio and Control connectors on the DA20. DM6-DA20/2 Fanning strip for terminals on DM6 end to 2 DB25's on DA20 end. The 2 DB25's o n the DA20 end plug into the Audio and Control connectors on the DA20. Please refer to the DA 20 manual for other wiring considerations. In particular, the Motor Start connector must be jumpered from Pin 1 to Pin 5. This is explained in the DA20 Manual. pins from the top of the Pink Noise Card on the component side. In this configuration, the surround switch on the Pink Noise Card will feed LS and RS simultaneously, so you will have to turn the LS Amplifier channel down while EQ'ing the the RS channel and vice versa. Next, play the test disc or film and set the auditorium levels as recommended by the digital processor manufacturer. Please note that the DM-6 has several points in the signal path where the gain may be adjusted. However, it is suggested that you make all level adjustments on the digital processor itself, and only use the internal trimpots on the DM-6 if a normal level cannot be obtained. DM-6 shown with 1/3 octave stage channel equalizers Setup It is necessary to feed pink noise at a 0. 5 volt level into each digital input in order to properly set the EQ. Feed each channel and set the house EQ as you normally would for an optical stereo processor. The easiest place to inject the Pink Noise is at the Digital Inputs Terminal Strip on the rear of the DM6. If you have already made connections to the terminals, then just unplug the cable at the DTS or DA20. Now you can feed these inputs with no loading on your Pink Noise source. [. . . ] Top set of pots is Left surround channel. Frequencies are printed on the edge of the card for each band. Output Card This card contains the VCAs and output gain stages. The trimpots are used to vary the output signal levels which will feed the power amps. Do not adjust these unless the digital processor level controls will not give sufficient level. [. . . ]