Rane SM26B Manual
Contents
1. as in 1 MONO OUTPUTS These 14 TRS jacks deliver either a conventional unbalanced output use mono cords or a balanced output use TRS cords Follow wiring conventions as in 1 A separate jumper exists to change all Output Sleeve connec tions from signal ground chassis ground or neither Refer to the assembly diagram for the jumper location if you need to change this LEFT amp RIGHT MIX OUTPUTS These balanced TRS 4 outputs are controlled by the MASTER OUTPUT LEVEL control They are fed either by the Master LEFT amp RIGHT INPUTS respectively or by any of the six MONO INPUTS or a combination of both Rane Note 108 helps Follow wiring conventions as in 1 Remote power supply input The SM 26B 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 SM 26B call for a 18 24 volt AC center tapped transformer only This is not a telephone jack Never use a power supply with your SM 26B other than the one supplied or a Rane approved replacement Chassis ground point A 6 32 screw is used for chassis grounding purposes See the CHASSIS GROUNDING note on the next page for details Manual 3 OPERATING INSTRUCTIONS Since numerous applications exist for the SM 26B no single set of operational procedures control its use Rane Note 108 included explores the many configurations of the SM 26B in depth and you should peruse it for applicati2. IN jack each stage has a gain range from Off to 12 dB minimum allowing level matching of 10 dBV equipment to 4 dBu gear When fed via the LEFT amp RIGHT INPUT s these CHANNEL LEVEL controls automati cally limit to a maximum of unity gain to accommodate the 12dB available from the Left amp Right Input gain stages MIX PAN controls These serve two different functions MIX When used as a SPLITTER this controls the mix of Left and Right Master Input program to each Channel s MONO OUTPUT PAN When used as a MIXER this control pans the Mono Channel Input between the LEFT and RIGHT MIX OUTPUTS MASTER INPUT LEVEL control This sets the gain of the Left amp Right Master Input stages with a range of Off to 12 dB In the splitting mode this controls the Level of all Mono Channel Outputs at once 1 e those which do not have a separate input Manual 2 REAR PANEL DESCRIPTION p N w A nn ke 7 MONO IN MONO OUT PMX OUTPUT Oz SM 268 Pi j 1 I 1 OWER MADE IN USA QOOOOOO 2O9O9O0O0O9 0O CE 6 5 4 3 2 1 6 5 4 3 2 1 LEI GHT c IOMA ALL INPUTS AND OUTPUTS ARE BALANCED TIP POS RING NE N SLEEVE CHASSIS GROUND cuss 2 fauipmenr 2000187897 LEFT amp RIGHT MASTER INPUTS These are balanced Tip Ring Sleeve TRS 1 4 Inputs These Inputs feed all six MONO OUTs when all MONO INs are not used Connecting to individual MONO INs disconnects that channel from these Inputs refer to t
3. RANE OPERATORS MANUAL SM 26B SPLITTER MIXER MASTER OUTPUT CHANNEL 1 CHANNEL 2 4 6 4 6 i 4 6 i 4 6 i a a a a 212 a a 212 a o 22 2 8 2 TOL 2 24 TOL a N a oS 2 R oN o UR a o Ek o eL o MIX PAN 10 MIX PAN o o 4 o 1 LeveL LEVEL LeveL CHANNEL 3 L R MIX PAN 10 MIX PAN CHANNEL 4 CHANNEL 5 ME a 4 6 i D 0 0 CHANNEL 6 ram 6 i O a BE R 0 MIX PAN MASTER INPUT 1 LEVEL LEVEL QUICK START Realizing that in most areas there are laws against reading owners manuals and that reading them under the blankets at night with a flashlight makes you feel stupid we therefore provide this brief yet informative description of how to use the SM 26B just in case your batteries are low and your mother is about to come in the room To achieve a quick understanding of the SM 26B think of it as a six channel mixer with faders and pans only Or think of it as a 2 to 6 channel splitter with output level controls and a mix knob to control how much of which input goes to which output If you get that you may stop here as long as you know how to hook up the power supply As a six channel mixer MONO IN 1 through 6 may be placed on the Right or Left bus or both in any amount The respective LEVEL knobs on the front of the unit serve as the mixer s faders the adjacent PAN controls place the channel s signal into the stereo field As an effects mixer or line level expander for a larger mix
4. er set up the LEVELS and adjust the PANS The MASTER OUTPUT LEVEL adjusts the overall level of the mix at the Master Outputs As a splitter place one or both input signals into the LEFT and or RIGHT Inputs Select the Input s to be placed at each of the six MONO OUTs by rotating the MIX PAN control to the proper position Set the individual CHANNEL LEVEL controls for proper output level The MASTER INPUT LEVEL control on the front adjusts both Right and Left Input signal levels together Never connect anthing except an RS 1 or other approved Rane AC power supply to the red thing that looks like a telephone jack on the rear of the SM 26B This is an AC input and requires some special attention if you do not have an operational power supply exactly like the one that was originally packed with your unit See the full explanation of the power supply requirements elsewhere in this manual SM 26B CONNECTION When connecting the SM 26B to other components in your system for the first time leave the power supply for last This gives you a chance to make mistakes and correct them before damage is done to anything fragile As you have no doubt noticed all Inputs and Outputs on the SM 26B s rear panel are 14 connectors The Inputs and Outputs are active balanced on Tip Ring Sleeve TRS jacks which allow the flexibility of connecting in either a balanced or unbalanced fashion If unbalanced operation is your preference the simplest way to acco
5. he Block Diagram found on the SM 26B Data Sheet For unbalanced operation use a standard mono A plug for balanced operation use a TRS stereo 4 plug wired as follows TIP is signal connect to Pin 2 on a 3 pin connector RING is signal pin 3 in a 3 pin connector SLEEVE is signal or chassis ground case on a 3 pin connector An internal Input Sheild Reference jumper connects signal ground default chassis ground or neither to all Input Sleeve connections See the assembly diagram for location should the need arise to change this LEFT amp RIGHT EXPAND OUTPUTS These 4 TRS jacks are connected in parallel with the Master LEFT amp RIGHT INPUT jacks allowing two or more SM 26Bs to be daisychained for multiple splitting Simply connect these EXPAND OUTPUTS to the LEFT amp RIGHT INPUTs of another SM 26B there is no limit to the number of expansions possible with the SM 26B NOTE These Expand Outputs are not buffered from the Master Inputs Therefore it is not possible to mix both balanced and unbalanced lines in the same channel between several units once the ring and sleeve are shorted anywhere in the chain by using a mono plug the entire line becomes unbalanced MONO INPUTS These are TRS 4 jacks which accept either balanced or unbalanced mono signals These are switching jacks which automatically bypass the Master LEFT amp RIGHT INPUTs whenever a plug is inserted see the Block Dia gram Follow wiring conventions
6. mplish this is through the use of tip and sleeve 1 4 connectors The ring is not essential unless balanced operation is required You should be aware that if you are running unbalanced and using TRS connectors with both ring and tip the ring and sleeve must be shorted together Failure to do so on the inputs results in a gain loss of 6 dB Balanced operation requires that TRS plugs be used The tip is hot the ring is return and the sleeve is ground RaneNote 110 Sound System Interconnection included here contains some great pictures to aid your interconnect ventures Manual 1 FRONT PANEL DESCRIPTION p ko CHANNEL 6 MASTER INPUT ra 4 6 1 d 1 1 u 2 2 a u 2le2 A O SS a AR a a Wea a Mi o 10 LEVEL m MIX PAN MIX PAN POWER switch Two guesses POWER indicator When this yellow LED is Jit the SM 26B is ready to go MASTER OUTPUT LEVEL control This controls the amount of signal at the MIX OUTPUT jacks It does not affect the level of any of the six MONO OUTSs This control changes the gain of the output stages This allows an increase in head room to eliminate overloading due to excessive combined signal from one or more Inputs Range of gain is from Off to 0dB unity Refer to the block diagram in the SM 26B Data Sheet and or schematics MONO INPUT LEVEL control Each of these controls the Level of signal through that particular channel When fed from the MONO
7. ons information INTERNAL JUMPER OPTIONS There exist within the SM 26B some signal routing options requiring removal of the top cover to move some jumpers If an SM 26B needs to have an additional set of indepen dent outputs as in a 2x4 stereo distribution amplifier see Rane Note 108 Figure 10 the LEFT and RIGHT MIX OUTPUTS can be used in addition to the 6 MONO OUTS Normally the LEFT and RIGHT MIX OUTPUTS produce the sum mix of all 6 LEVEL and PAN controls To break any Channel away from the Mix Output bus jumpers have been provided Jumper 1W2 connects MONO OUT 1 to the mix bus 2W2 connects MONO OUT 2 3W2 connects MONO OUT 3 and so on POWER SUPPLY As noted elsewhere in this manual never use a power supply with your SM 26B other than the one supplied with your unit or an exact replacement obtained from Rane Corporation The SM 26B s power supply is an AC supply which is a 18 24 volt center tapped transformer capable of supplying the current demanded by this product Using any other type of supply may damage the mixer and void the warranty Rane Corporation Manual 4 IMPORTANT NOTE CHASSIS GROUNDING If after hooking up your system it exhibits excessive hum or buzzing there is an incompatibility in the ground ing 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 lif
8. ting 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 such as the SM 26 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 con nected to a screw on the chassis with a star washer to guarantee proper contact Please refer to RaneNote 110 Sound System Inter connection in this manual for further information on system grounding 10802 47th Ave W Mukilteo WA 98275 5098 TEL 425 355 6000 FAX 425 347 7757 WEB http www rane com All features amp specifications subject to change without notice FEB98
Download Pdf Manuals
Related Search