User manual RANE SM 82

[. . . ] This will give you a chance to make mistakes and correct them before any damage is done to your fragile speakers and ears. INPUTS The SM 82's Inputs are unbalanced. This means that standard ¼" connectors on the ends of any good quality cable will work well between your signal sources, signal processing and amplification. For best rejection of nasty things like hum and RF, keep input cables under 10 feet (3 meters) in length. [. . . ] To alleviate this condition, the switch must be "turned on", so to speak. 2 Input LEVEL control: is a rotary stereo attenuator that adjusts the amount of both Left and Right signals applied to the Input. Its output is routed to the main summing amplifier for mixing with all other Inputs. The unity gain position of this control is located at "7. 5. " 3 Input OVERLOAD indicator: glows red whenever the Input's output exceeds a level 4 dB below clipping, letting you know it's a good idea to turn this Input down a bit. 4 Input BALANCE control: In its center detent, Left and Right signals to each channel are allowed to pass at their original relative levels, therefore preserving the stereo image from instrument connected to the Inputs. When the control is moved vertically toward the "L" position, the Right channel level is decreased while the Left channel level is maintained. The opposite occurs if the control is moved from the detent down toward the "R". When a mono input is used (no plug in the RIGHT Input jack), the BAL control becomes a PAN control, panning the mono signal from the Left to Right channels. 5 Input SEND Level control: determines the amount of Post-Fade stereo input is fed to the auxiliary buses. Each Input's stereo SEND is summed on this bus and is available at the respective LEFT and RIGHT LOOP SENDS on the rear of the mixer. 6 RETURN LEVEL control: is a rotary stereo attenuator that controls the amount of Return which is to be added to the Main Output. The unity gain position of this control is located at "7. 5. " 7 RETURN OVERLOAD indicator: glows red whenever the return levels exceed a level of 4 dB below clipping. 8 RETURN BALANCE control: is a vertical slider that controls the effect or source connected to the LOOP RETURN in the same way the Input BALANCE controls work (see 4 above). 9 OUTPUT LEVEL control: is a rotary stereo attenuator that controls the final signal Level at the main OUTPUT jacks. The unity gain position of this control is located at "7. 5". 0 OUTPUT OVERLOAD indicator: glows red any time the output level exceeds 4 dB below clipping. q OUTPUT BALANCE control: is a vertical slider that operates in the same fashion as the BALANCE control described in item 4 above. It however, determines the relative levels of the LEFT and RIGHT main OUTPUTS only. Manual-2 REAR PANEL DESCRIPTION 9 OUTPUT BALANCED MAIN EXPAND OUTPUT LOOP RETURN UNBALANCED LOOP SEND UNBALANCED 8 7 6 5 4 3 2 1 MAIN EXPAND INPUT LOOP EXPAND INPUT POWER LEFT RIGHT ACN 001 345 482 SM 82 TIP=L RING=R LEFT (MONO) RIGHT LEFT (MONO) RIGHT LEFT (MONO) RIGHT LEFT (MONO) RIGHT LEFT (MONO) RIGHT LEFT (MONO) RIGHT LEFT (MONO) RIGHT LEFT (MONO) RIGHT LEFT (MONO) RIGHT LEFT (MONO) RIGHT TIP=L RING=R 300mA CLASS 2 EQUIPMENT RANE CORP. MADE IN U. S. A. ALL INPUTS ARE UNBALANCED 1 2 3 4 5 67 8 1 Main OUTPUT: These balanced Tip-Ring-Sleeve jacks are used to connect the main Outputs of the SM 82 to a power amplifier or to additional signal processing. As is the standard with all Rane balanced outputs using ¼" TRS jacks, the Tip is (+), the Ring is (­) and the Sleeve is ground. 2 MAIN EXPAND OUTPUT: This ¼" TRS stereo (Tip = left, Ring = right) Output jack connects one SM 82 to another for the purpose of expanding the number of Inputs available in the system. Only a stereo plug and cord should be used. To do otherwise will cause loss of Right channel signal and possibly distortion to the Left channel. [. . . ] Try combinations of lifting grounds on units that are supplied with ground lift switches or links. If your equipment is in a rack, verify that all chassis are tied to a good earth ground, either through the line cord grounding pin or the rack screws to another grounded chassis. Units with outboard power supplies, such as the SM 82, do not ground the chassis through the line cord. Make sure that these units are grounded either to -another chassis which is earth grounded, or directly to the grounding screw on an AC outlet cover by means of a wire connected to a screw on the chassis with a star washer to guarantee proper contact. [. . . ]