OPERATING / SERVICE MANUAL DMS 22
Contents
1. TM high frequency shelving equalizer In center detent the control is grounded and effectively removed from the circuit CW rotation increases the gain of the mixer above the frequency set by the High Frequency Turnover Switch to a maximum of 12 dB in a shelving fashion CCW from center decreases the gain to a minimum of 15 dB HIGH frequency turnover switch selects the mid band location of the High filter at either 7 kHz or 12 kHz For full boost cut amounts this frequency is where the gain change equals approximately 6 dB EQ engage switch In the ZN position the EQ controls actually work In the OUT position all EQ controls simply add to the stylish looks of the unit and do nothing PAN control In the center position this control sends an equal amount of signal to both the LEFT and RIGHT STEREO OUTS with the PAN pushbutton JN As you rotate this control CW more of the signal is sent to the RIGHT STEREO OUT and less to the LEFT STEREO OUT Conversely if you rotate this control CCW more of the signal is sent to the LEFT and less to the RIGHT This control does not affect the individual CHANNEL OUTPUTS PAN engage switch In the JN position the PAN control operates as described above In the OUT position it is believed that all the Planets are held in their correct Solar orbit the PAN control does not function and that Channel does not send a signal to the STEREO OUTPUTS STEREO OUTPUT LEVEL control is an attenuation type control which2. adds no gain to the Output signal but can reduce the amount of signal available at only the STEREO OUTPUTS At full CCW no signal will be present at the STEREO OUTPUTS At full CW no attenuation will be applied delivering full signal to the STEREO OUTPUTS Note this controls does nothing unless one or more of the PAN IN OUT switches are in the IN position Consequently the Planets of our Solar system may fall out of orbit Manual 2 REAR PANEL DESCRIPTION XLR mic INPUT connector is a fully balanced mic Input Pin 2 is positive pin 3 is negative and pin 1 is chassis ground LOW 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 Individual CHANNEL OUTPUT This is a fully balanced 1 4 TRS connector This Output is not mixed between Channels so CHANNEL signal can never be present on the INDIVIDUAL CHANNEL 2 OUTPUT and vice versa The Output is considered to be line level XLR STEREO OUTPUTS LEFT amp RIGHT These are fully balanced outputs Pin 2 is positive pin 3 is negative and pin 1 is chassis ground Remote POWER supply input The DMS 22 is supplied from the factory w
3. are all fully balanced On these Outputs pin 2 or tip is hot or pin 3 or ring is return or and pin 1 or sleeve is chassis ground If an unbalanced Output is desired do not short pin 3 or ring to ground Instead use a XLR connector or 4 TRS depending on the output you are using and do not connect pin or the sleeve of the 1 4 TRS connector Again see RaneNote 110 for more details Manual 1 FRONT PANEL DESCRIPTION POWER indicator illuminates yellow any time an approved Rane AC remote supply such as an RS 1 included or RAP 10 is connected to the unit and is active 48V PHANTOM POWER switch amp indicator In the in position 48 volts DC Phantom Power is applied to pins 2 and 3 of the INPUT connector When Phantom Power is on the LED will illuminate POLARITY switch allows the user to change the Output polarity in respect to the Input polarity It affects all Outputs In the NORM position polarity is preserved throughout the unit In the INVERT position signal polarity is reversed from the Input to the Output OL LED indicator illuminates red any time signal is within 4 dB of clipping Two key locations are monitored INPUT GAIN control increases Input GAIN as it is rotated clockwise Its range is 15 dB of gain at full CCW rotation to 60 dB at full CW rotation OUTPUT LEVEL control is an attenuation type control that adds no gain but can reduce the amount of output si
4. 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 Manual 3 OPERATING INSTRUCTIONS The DMS 22 has been design to operate in a similar fashion to most mixer input strips Anyone familiar with mixers should have little difficulty mastering the DMS 22 INPUT SECTION When setting up the Input section one should always take as much gain as possible right at the Input Therefore the highest level audio from the MIC INPUT should just about light the OL LED It is a good idea to experiment with different settings to make sure the input stage is set up properly Failure to do so will sacrifice noise performance down the line Pristine 48 volt Phantom Power is available at a push of a button with no degradation of the audio signal quality This is sufficient to cover most microphones on the market and is specifically designed for fussy high end microphones requiring full 48 volts of Phantom Power Verification is recommended that your mic can handle 48 volts of Phantom Power if used If your application requires an inversion of the signal polarity the DMS 22 ac
5. OPERATING SERVICE MANUAL DMS 22 DUAL MICROPHONE STAGE RANE QUICK START Even if you don t like to read manuals read this part We ll make it quick and painless We promise Damage to your equipment though unlikely is a possibility if the DMS 22 is used improperly Turn both INPUT GAIN controls both OUTPUT LEVEL controls and the STEREO OUTPUT LEVEL control fully counterclockwise CCW Connect your mic s to the INPUT jack s located on the rear of the unit If your mic s require phantom power press the 48V PHANTOM POWER switch es on the front panel Set the EQ switch to OUT Decision time will you use the DMS 22 to mix your mic s to a two channel feed If the answer is yes connect the STEREO OUTPUT s XLR located on the rear of the unit to a line level input on your mixer If the answer is no connect the CHANNEL OUTPUT s 4 TRS to a line level input on your mixer If you are using the STEREO OUTPUT s of the DMS 22 then engage the PAN switch es and set the PAN controls where you want them Plug the included power supply see note below into the DMS 22 The yellow POWER LED should light and if Phantom Power is being used the red PHANTOM POWER LED should be lit Now whisper yell or scream into your mic the loudest sound you expect to deliver during your session or performance While doing this adjust the INPUT GAIN control so that the loudest whisper yell or scream will just barely illuminate the OL LED With
6. commodates that with a POLARITY INVERT switch LOW FREQUENCY FILTERS located on the rear are also provided with three different settings to remove potential low frequency bumps and such EQUALIZER The EQ section of the DMS 22 is particularly interesting The high frequency and low frequency shelving controls feature Rane s patented Accelerated Slope TM circuitry This helps eliminate the unwanted influence over out of band signals so prevalent in standard shelving controls What this means is that the rolloff rates are much steeper than those usually encountered Additionally both high frequency and low frequency shelving controls feature a Turnover switch allowing the user to select the Frequency range most appropriate to their application The midrange section of the DMS 22s equalizer is parametric The bandwidth may be set to one of three settings 1 3 octave l octave or 2 octaves The center frequency may be adjusted over a range of 95 Hz to 4 kHz All three bands cover an amplitude range of 15 dB to 12 dB All of the Level controls feature a grounded center detent thus ensuring that a zero setting gives you just what you wanted a guaranteed zero flat response The EQ IN OUT switch provides a hard wire bypass around the equalizer section Even though the center detents of the EQ Level controls provide a guaranteed zero some engineers use the bypass to compare the EQ settings INDIVIDUAL CHANNEL OUTPUTS If mixi
7. gnal At full CCW no signal will be present at any DMS 22 Output and at full CW no attenuation will be applied to the signal allowing full signal to CHANNEL OUTPUTS and to the STEREO OUTPUT LEVEL controls LOW EQ level control determines the amount of boost or cut applied to the DMS 22 s Accelerated Slope TM low frequency shelving equalizer The center detent provides a ground for the filter thus bypassing it Rotating this knob CW increases signal gain below the frequency set by the Low Frequency Turnover Switch to a maximum of 12 dB with a shelving characteristic CCW from center decreases the gain to a minimum of 15 dB LOW frequency turnover switch determines the mid band filter location at either 50 Hz or 100 Hz For full boost cut amounts this frequency is where the gain change equals approximately 9 dB MIDRANGE EQ level control As above CW rotation increases gain CCW rotation decreases gain In center detent the control is grounded and effectively removed from the circuit For the MID FREQUENCY EQ we have a bandpass type filter as opposed to a shelving type filter The range is 15 dB to 12 dB MIDRANGE OCTAVE bandwidth selector allows the user to select 1 3 1 or 2 octave coverage for the midrange filter MIDRANGE frequency control determines the center frequency of the midrange filter with a range of 95 Hz to 4 kHz HIGH EQ level control determines the amount of boost or cut applied to the patented Accelerated Slope
8. ith 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 Chassis 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
9. ng of the two Channels is not required or desired and you simply want to have two separate mic to line level preamps use the individual CHANNEL OUTPUTS They are fully balanced 14 TRS connectors The PAN and STEREO OUTPUT LEVEL controls have no affect on these individual CHANNEL OUTPUTS Rane Corporation Manual 4 STEREO OUTPUTS These STEREO OUTPUTS allow you to mix split one or two Inputs to two Output Channels The PAN control directs the amount of signal available to the STEREO LEVEL CONTROL which in turn determines the overall amount of signal available at the STEREO OUTPUTS They are fully balanced XLR connectors 10802 47th Ave W Mukilteo WA 98275 5098 TEL 425 355 6000 FAX 425 347 7757 WEB http www rane com 103228
10. that done you can adjust both OUTPUT LEVEL controls and the STEREO OUTPUT LEVEL until the desired input level is reached Never connect anything except an approved Rane power supply ot the thing that looks like a red telephone jack on the rear of the DMS 22 This is an AC input and requires special attention if you do not have an operational power supply exactly like the one originally packed with your unit See the full explanation of the power supply requirements elsewhere in this manual DMS 22 CONNECTION When connecting the DMS 22 to other components in your system leave the power supply for last This will give you a chance to make mistakes and correct them before any damage is done to your fragile speakers ears and nerves INPUTS on the DMS 22 are balanced This means that standard XLR connectors on the ends of any good quality cable will work well with the DMS 22 and microphones of your choosing As with all Rane products pin 2 is used for hot or polarity pin 3 is return or and pin 1 is chassis ground If you are not using Phantom Power you may use either pin or case for shield ground on the DMS 22 Input However if you are using Phantom Power pin must WEAR PARTS This product contains no wear parts be shield ground to provide a complete electrical circuit See RaneNote 110 Sound System Interconnection included in this manual for further information on this subject OUTPUTS on the DMS 22
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