AUDIO TELEX SA User manual

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OPERATING INSTRUGTIONS
AND
CONNECTIONS
SA SERIES MIXER AMPLIFIERS
Audio Telex Communicolions Ply Lld
SYDNEY
'12G124 Beoconsfield St
AUBURN NSW 2144
Pri\ote Bog 114
ERMINGTON NSW 2115
Phone [phone]
Fcx [phone]
MEI.BOURNE
4/2630 Howteys Rood
NOTNNG HILI VIC 3168
P, O. Box 468
MT WAVERIfY VIC 3149
Phone [phone]
Fox [phone]
BRISBAI{E
42 Commerciol Rood
P, O, Box 871
FORIruDE VALLEY
OLD 4M6
Phone [phone]
Fox [phone]
PERIH ADEWDE
Unit 7/M{6 Kent Street Eleclronic Concepts
Connington 76 George St, theborton
P, O, Box 489 61A7 P, O, Box 7034 HuttSt50Ol
Iel [phone] Tel [phone]
Fox [phone] Fox [phone]
NEW ZEAIAND
8 Collins Sfeet
MORNINGSIDE
AUCKLAND
Phone (tl9) 86 7032
Fox (09) 89 4588

OPERATING INSTRUCTIONS SA SERIES AMPLIFIERS
SA SERIES MIXER AMPLIFIERS
Congratulations on your purchase of our SA series mixer amplifier. As you are no doubt aware , mains
power must be disconnected before removing the lid or making any internal adjustments or connections to
the amplifier. The SA Series Mixer Amplifiers are two rack height units suitable for direct rack mounting in a
standard 482mm rack format, or desV table mount by means of the rubber feet provided. They are equipped
with lour balanced microphone inputs, one line input and two auxiliary inputs (switched). The following
informa tion will provide setting up and connectior(iirformation for use in a conventional sound reintorcement
system. More detailed information and performance data is available from your dealer or any Audio Telex
Communication's oflice.
SETTING UP
For normal operation the master gain control should be set at mid position and the various microphone , line
or auxiliary cpntrols adjusted to their desired level. See details under " controls" below.
PANEL CONTROLS (fig 1 )
7...." MASTER " This control adjusts the overallvolume from the output of the mixer section of the amplifier.
Normal position for this control is 5 , which will enable the overall volume level from the amplifler to be
adjustecl up or down as required.
1...." MIC " Marked one to four, these controls will respond to microphone inputs connected at the rear of the
amplifier.The setting will depend upon the sensitivity of the microphone, which is connected. Generally a
setting of six to seven is ideal for most dynamic microphones with an impedance of 200 ohms, however the
purpose of multiple microphone inputs is to enable microphones o{ varying levels to be mixed to produce the
desired performance level.
2...." LINE " The line input will respond to inputs connected to the appropriate connections at the rear of the
amplilier.Generally, program sources sucfi as a tape deck, cd disc player, telephone line or wireless
microphone can be connected to this input.
3...." AUX " The auxiliary control is used in conjunction with the switch marked " AUX1 - AUX2 "(4). Auxiliary
inputs such as tape decks, background music players, radio tuners or wireless microphones are some of the
sources normally connected to these inputs. The switch " AUX1 - AUX2 " should be pressed " in " to connect
auxiliary input one and " out " to connect auxiliary input two. Note that it is not possible to amplify both
auxiliary inputs simultaneously , although they can be permanently connected , ( see connection details ) .
5...." BAS.S " The bass control will normally be operated in the zero position to obtain a flat overall
responsefor the amplifier. To boost the bass response ol the amplilier turn the control clockwise towards
five. To cut bass response turn the cantrol counter clockwise towards five.
6...." TREBLE " The treble control will normally be operated in the zero position , which sets the treble
response of the amplifier for a flat performance. To boost the high frequency perform ance of the amplilier ,
adjust the control cloclarvise towards five. To cut the high frequency response , turn the control counter
dockwise towards five.
9...." VU METER " Marked in decibel graduation from +3 to 21 , the light emitting diodes will indicate the
volume level at the output of the amplifier. For normal operation the l.e.d.s glow green as they modulate with
the output level of the amplifier. lf the lights cunsistently indicate red, the amplifier is being over-driven ,
resulting in distortion in the quality of the output signal.
8...." POWER " This switch turns on or off the mains power to the amplifier. An Le.d. glows red to indicate
the amplifier is turned on.
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OPEBATI NG INSTRUCTIONS SA SER]ES AMPLIFIERS
CONNECTIONS (fig2)
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1.... Three pin IEC mains power inlel24Ol120 vac with built in fuse drawer and spare fuse. Ensure the mains
cord is disconnected before replacing the fuse.( Fuse sizes are indicated further on in these instructions. )
2.... Terminalstrip lor speaker connections are from left to right as follows;
term 1..... B ohms)
term 2..... I ohms)
term 3..... Common return for 70 and 1OOvolt line.
term 4..... 70 volt output.
term 5..... 100 volt output.
term 6..... Spare( ldealfor connection of tone generator)
lerm 7..... Spare( remote start or any ancillary control )
3....24 volts dc power source input, two post type terminals RED + BLACK - .
4.... DC low voltage fuse . Remove with a screwdriver after disconnecting mains power.
5.... External aluminium heat sink. As this unit generates heat during continuous operation , care should be
taken to avoid skin contact wilh it.
6.... Auxiliary inputs, connections are twin RCA type phone connectors , allowing up to two auxiliary sources
to be connected.
7.... Balanced $ansformer output, male XLR socket. Pin connections... 1.. eafih 2... active 3... active.
8.... Tape recorder output , twin RCA phone connectors to enable left and right stereo connection for
monauraloutput.
9... Line input, twin RCA phone type connectors.
10... Four XLR female microphone inputs, accept 200 ohms balanced microphones. Connections
Pin 1... earth Pin 2...active Pin 3...active.

OPERATING INSTRUCTIONS SA SERIES AMPLIFIERS
SPECIAL ACCESSORIES
TONE GENERATORS ; Four types of tone generators are avail able as options . They are easily fined by
first removing the mains cord and then , by means of screws on either side, remove the lid. Attach the
module to the metal base of the amplifier, using the adhesive tape provided. Ptug the seven pin plug into the
socket as shown on the diagram supplied with the tone module. Replace the lid and reconnect the mains
cord. Note the module can be switched on off from a remote connection by utilising the spare terminals
described in "CONNECTIONS" item 2 . Operation of the tone generator will automatically mute the line and
auxiliary inputs, however the microphone inputs remain active to ensure paging is possible during an
emergency.
Tone Generators avaitable ;
ATC5227 Continuous beil
AfC5228 Pre announce chime
ATC5229 Evacuatlon tone
ATC5230 Alert tone
MICROPHONE LINE TRANSFORMER SA4012 ; When long microphone lines are utilised , there is atways a
risk of inducing hum or noise , particularly when there is electrical interference in the vicinity of the cables.
The SA4012 is a " plug in " balanced 200 ohm mic line transformer with a nu-metal shleld,which will reduce
the possibility of induced hum and noise. .lt is fitted into the sockets provided for each micro phone input ,
inside the amplifier.
To fit the SA4012 , disconnect the mains power and remove the lid , by means of the screws at either
side,remove the existing jumper plug for the reqired input. Plug the SA4012 into the appropriate input
socket, located on the circuit board .(see diagram with SA4012 )
VOTCE OPERATED MUTTNG MODULE TX3010; Automatic muting of ail microphone , tine and auxitiary
inputs is possible from microphone input one , which is a designated priority input.Voice operation of a
microphone in this input witl cause the module to switch off all other inputs. This function is ideal for muting
background music or other sources during paging.
To fit the TX3010 module, discunect the mains power and remove the lid of the amplifier by means of the
screws on either side . Remove the jumper plug from the socket adiacent microphone input one ( see
MIC/LINE INPUT CONVERSION MODULE ; Any microphone input on the 5460 and SA120 can be
converted to an extra line input by means of the TX3011. The function is useful for accepting high level
paging inputs such as a telephone or telecom line.
To fit the TX3011 disconnect the mains and remove the lid. Remove the existing jumper plug lrom the
required mic input socket located on the circuit board. Plug the TX3011 into the socket and replace the
rid.
FUSE SIZES SA AMPLIF]ERS
MAINS FUSE RATINGS DC FUSE RATINGS
SA3O.....1AMP SB 3AMPS SB
SA6O.....2AMP SB sAMPS SB
SA12O..4AMPS SB 10 AMPS SB