Rane MLM 82 1997 version - Manual (Page 3)

Manual-3
REAR PANEL DESCRIPTION
ቢ MIC/LINE INPUT jacks 1-4. These XLRs connect either balanced Microphone or Line signals, depending on the recessed
front panel LINE switch setting (see Front Panel,
ቤ). Rane adheres to the international and U.S. standard for balanced pin
configurations: Pin 1 is chassis ground (neutral), pin 2 is positive, and pin 3 is negative.
ባ PHANTOM POWER switch applies 15 volt phantom power to Inputs 1-4 that are mic-selected (front panel LINE LED
off).
ቤ MONO BALANCED LINE INPUT jacks 5-8. These XLR inputs split the Input signal to both Left and Right Outputs
equally. Wiring is per #1 above. Choose between this XLR or the ¼" jacks (see
ብ below), they do not sum.
ብ ¼" LINE INPUT jacks. These pairs of balanced Tip-Ring-Sleeve jacks accommodate stereo line level signals using Left
and Right connections. If the source signal is mono, use the LEFT/MONO jack and the internal switching auto-splits to both
Outputs equally. These are TRS (tip-ring-sleeve) ¼" jacks accommodating either balanced or unbalanced signals. In most
cases an unbalanced signal may utilize a mono ¼" plug (tip-sleeve). For balanced signals use microphone cable (two
conductor with shield) with TRS ¼" plugs. See the Sound System Interconnection RaneNote included with this manual for
proper connector wiring.
ቦ LEFT and RIGHT OUTPUT jacks. These XLRs connect the main Outputs to a power amplifier, signal processor,
recorder, or sound system, with the OUTPUT LEVEL switch (see
ቧ below) set for the correct level. Pin connections are the
same as above in
ቢ.
ቧ OUTPUT LEVEL switches attenuate the available line level down to a level compatible with microphone preamp inputs.
Put these in the out position when LINE level Outputs are desired, and depress them in for MIC level Outputs.
ቨ POWER supply input. This is not a telephone jack. The MLM 82 is supplied from the factory with an RS 1 remote power
supply suitable for connection to this input jack. The power requirements call for an 18 volt AC center-tapped transformer
only. Call the Rane factory for replacement or substitution.
ቩ Chassis ground point. A #6-32 screw is provided for chassis grounding purposes. See the note below for details.
CHASSIS GROUNDING
The MLM 82 is supplied with an external power supply (the RS 1). This power supply does not ground the unit. On
the rear chassis a 6-32 screw is provided to allow for attachment of the grounding wire. This chassis ground point must be
connected to earth ground either through another product which utilizes a three-prong grounded AC power cord or by
attaching the wire to a known earth ground, (the screw on a grounded AC outlet.)
If after hooking up your system it exhibits excessive hum or buzzing, there is an incompatibility in the grounding
configuration between units somewhere. Your mission, should you accept it, is to discover how your particular system
wants to be grounded. Here are some things to try:
1. Try combinations of lifting grounds on units that are supplied with ground lift switches or links.
2. If your equipment is in a rack, verify that all chassis are tied to a good earth ground, either through the line cord ground-
ing pin or the rack screws to another grounded chassis.
3. Try moving the device away from high magnetic field sources, such as large transformers used in power amplifiers.
Please refer to the RaneNote “Sound System Interconection” for further information on system grounding.