Ashly manual Operating Manual - DLM-821 Stereo Ducking Line/Microphone Mixer, Power Switch

Operating Manual - DLM-821 Stereo Ducking Line/Microphone Mixer

5.9Power Switch

The DLM-821 power switch is on the back panel. When it is pressed in the front panel power LED will be- come lit.

5.10Mono Output Mic/Line Switch

This switch selects between a 0dBu (out posi- tion) line level or -40dBu (in position) mic level signal feeding the Mono output connector.

5.11Stereo/Mono Input Switches

These four pushbutton switches allow selection between a stereo or mono signal connection to input chan- nels 1 through 4 respectively. In the Out position, stereo left and right cables should be connected. In the in posi- tion, a mono cable should be connected to the R(Mono) connector which then internally feeds the signal to both left and right sides.

5.12Phantom Power Switches

There is a phantom power switch for channels 1 and 2 and a phantom power switch for channels 3 and 4. Pushing the switch in applies +18VDC to the (+) and (-) input terminals of the two associated channels to power condenser mics. The input channels should be muted using the On/Mute switches when switching phantom power on or off to avoid any pop noises.

Internal PCB Jumper Options:

5.13Ch. 2 Detect Enable *

Internal jumper J1 allows enabling or disabling the ducker detector for ch. 2. (factory default is enabled)

5.14Ducking Level *

Internal jumper J16 allows selection between -20dB ducking level and -90 dB ducking level. (factory default is -20dB)

5.15Ch. 1 Priority *

Internal jumper J6 allows enabling ch. 1 to have priority over ch. 2 and fully attenuate channels 2-8. This feature is useful for applying an emergency page or alarm on channel 1 and applying a normal host page input on ch. 2. (factory default is ch.1 priority disabled)

5.16Left and Right Ducking Enable *

Internal jumpers J14 and J15 allow the left and right signal ducking to be enabled or disabled indepen- dently. (factory default is left and right ducking enabled)

*For internal jumper adjustments, remove AC cord from rear of unit and refer to a qualified service technician. (see PCB jumper locations in fig. 5.2)

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