User manual AKG DFM 4X4

[. . . ] And do not expose it to direct sunlight, excessive dust, moisture, rain, mechanical vibrations, or shock. To avoid hum or interference, route all audio lines, particularly those connected to the microphone inputs, away from power lines of any type. If you use cable ducts, be sure to use separate ducts for the audio lines. Clean the equipment with a moistened (not wet) cloth only. [. . . ] 2 Setting Up your Before starting the program: Software · check that the DFM4x4 is connected to your computer. If it is not, use the supplied RS-232 cable to connect the DFM4x4 to the computer. Prior to all manipulation and interconnection make sure you have equipped all the devices with a unique address, a number between 128 and 256. To change an address, connect only one device to the computer and if using an AS16x12 or AS8, place it in "MASTER" mode. Launch the software at "Start/Programs/LecNet for AKG/LecNet Master Pro" or double click on the shortcut to LecNet Master Pro you might have created on your desktop. The LecNet program will run a check to see which devices are connected to your computer, thus automatically find the DFM4x4 you have linked to your computer. The addresses of all your connected devices will pop up. This will get you to an active programming screen for your DFM4x4. In the "Input Gain" tab you can fine adjust your input gain and set the minimum and maximum values for remote control via the Programmable Inputs. When finished in a tab save your setting in a Preset by clicking on "File/Save Active Setup to Disk File. " to save it on your computer or "Save Active Setup to DFM4x4 Preset" to save it on the DFM4x4. Click on the "Output Gain" tab and set your Output gains as well as the minimum and maximum values for remote control via the Programmable Inputs. The "Master Output" section enables you to apply gain changes to several outputs at the same time. Select the type of filter you want to use from the "Filter Type" list. All filters, except for the ADFE Notch, have adjustable frequencies from 20Hz to 20kHz. The bandwidths of the filters that support adjustable bandwidth are selectable from 0. We advise you to carefully listen to the changes you have made and stop equalizing as soon as the sound is acceptable. Once the room is equalized, set an ADFE and start to turn up the volume to a point where feedback sets in. The ADFE will notch the frequency at which the first feedback occurs. Repeat this until you have achieved an acceptable volume level. Three or four fixed ADFEs, after having equalized the room, would still be OK. (Should you need more you may want to check if your problem should not be solved acoustically. [. . . ] Each Programmable Input is internally pulled up though a 100K resistor to +5 VDC, so no external pull-ups are necessary. When using a continuous voltage with one of the Programmable Inputs, set the function of the Programmable Input to either "Analog Input Control" or "Analog Output Control" in the "Function" line on the "Programmable Input" tab in the control panel of the LecNet software. The maximum acceptable voltage for each Programmable Output is 40 V Pins and they will safely conduct up to 100 mA DC continuous. You may run LEDs from the +5 VDC pin on the Programmable Input connector as long as the total LED current for all LEDs on does not exceed 100 mA. [. . . ]