Rane DMS 22 - Manual (Page 3)

Manual-3
REAR PANEL DESCRIPTION
ቢÿXLR mic INPUT connector: is a fully balanced mic Input. Pin 2 is positive, pin 3 is negative and pin 1 is chassis ground.
ባÿLOW FREQUENCY cut off FILTER: allows you to roll off the low frequency end of the signal at three different preset
locations. In the 15 Hz position, there is essentially no roll off of the low end within the normal audio frequency range. 50
Hz and 100 Hz are available to help remove mic bumps and rumble that might otherwise ruin a good session or perfor-
mance. These frequencies are the -3 dB points.
ቤÿIndividual CHANNEL OUTPUT: This is a fully balanced ¼" TRS connector. This Output is not mixed between Channels
so CHANNEL 1 signal can never be present on the INDIVIDUAL CHANNEL 2 OUTPUT and vice-versa. The Output is
considered to be line level.
ብÿXLR STEREO OUTPUTS (LEFT & RIGHT): These are fully balanced outputs. Pin 2 is positive, pin 3 is negative and
pin 1 is chassis ground.
ቦÿRemote POWER supply input: The DMS 22 is supplied from the factory with a Model RS 1 Remote Power Supply
suitable for connection to this input jack. The power requirements of the DMS 22 call for an 18-24 volt AC center-tapped
transformer only. This is not a telephone jack. Never use a power supply with your DMS 22 other than the one supplied or
an exact replacement obtained or approved by Rane Corporation. Using any other type of supply may damage the unit and
void the warranty. Two years parts and labor is worth safeguarding, don’t you think?
ቧÿChassis ground connector: Since the DMS 22 is powered from a remote AC supply which does not carry chassis ground
through to the grounding pin of the AC cord, this screw has been provided in case your system does not have another earth
grounding means such as through rack rails, etc. Its use or disuse should be determined by your specific application. See the
note below.
CHASSIS GROUNDING
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, 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
grounding pin or the rack screws to another grounded chassis.
3. Units with outboard power supplies like the DMS 22 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.
Please refer to the RaneNote “Sound System Interconnection” in the next section of this manual for further information
on system grounding.