SoundCraft SM20 Instruction manual

Copyright Soundcraft
E. & O.E. 5/98
©
TECHNICAL DATA
Issue l 5-98 ZL0474 (Std), ZL0475 (US)
Page1

Copyright Soundcraft
E. & O.E. 5/98
Issue l 5-98 ZL0474 (Std), ZL0475 (US)
Page 2
©
TECHNICAL DATA
RNGE
Input, Output and
Master Modules
Input Module
Master Module
Output Module

Copyright Soundcraft
E. & O.E. 5/98
Issue l 5-98 ZL0474 (Std), ZL0475 (US)
Page 3
©
TECHNICAL DATA
OPTIONAL RELAY SWITCH TRANSFORMER BOARD
MULTIPIN OPTION
INSERT SEND INSERT RETURN
DIRECT OUTPUT MULTIPIN OPTION POSTMUTE
POSTMUTE
PRE EQ/POST MUTE
PRE EQ/POST MUTE
PRE EQ/POST MUTE
PRE EQ/POST MUTE
PRE EQ/POST MUTE
PRE EQ/POST MUTE
PRE EQ/POST MUTE
PRE EQ/POST MUTE
POSTFADE
POSTMUTE
POSTMUTE
POSTMUTE
POSTMUTE
POSTMUTE
SEND R
SEND 8B SEND 7B
SEND 12B SEND 11B SEND 10B SEND 9B
SEND L
SEND 8A SEND 7A SEND 6 SEND 5
SEND 12A
PRE PRE PRE
GLOBAL STE SWITCHING BUSSES
GLOBAL STE SWITCHING BUSSES
PRE
EQ
PFL
INS
MUTE
SAFE
1 8
MUTE
RNGE
+48V
PRE PRE
PRE PRE PRE PRE
PRE
PRE PRE
SEND 11A SEND 10A SEND 9A
PREMUTE
PRE_EQ
POST EQ
SHELFSHELF
POSTEQ
PRE_EQ
20-400Hz
+20 PK +14 +18 +5 [phone]
INPUT
METER
POST EQ
POSTFADE PEAK
DETECTOR
HI-PASS FILTER
BELLBELL
FREQFREQ
Q
FREQ
Q
FREQ CUT/ BOOST
CUT/ BOOST
CUT/ BOOST
CUT/ BOOST 28kHz 28kHz
12kHz
3
12kHz
1.5kHz
3
1.5kHz
480Hz 480Hz
1kHz 1kHz
450Hz
0.5
450Hz
78Hz
0.5
78Hz
LF HFLOW_MID HI_MID
30Hz 30Hz
PFL
LOGIC
PFL DETECT
GLOBAL STE SWITCHING BUSSES
GROUP BUSSES 1-20
PFL BUS
INPUT SOLO CLEAR
SEND 4 SEND 3 SEND 2 SEND 1
L/R
L/R L/R
L/R L/R L/R L/R
PREMUTE
PREMUTE
PREMUTE
PREMUTE
PREMUTE
PREMUTE
PRE_EQ
PRE_EQ
PRE_EQ
PRE_EQ
PRE_EQ
PRE_EQ PRE_EQ
POSTED POSTED
PRE_EQ
MUTE LOGIC
MUTE BUS
MUTE ASGN
(2 OF 8 SHOWN)
FADER
+10
PREMUTE
PREMUTE
PRE_EQ
POSTFADE
PRE_EQ POSTFADE
-2dBu GROUND COMP O/P
-2dBu GROUND COMP O/P
-2dBu WITH GROUND COMP SEND +4dBu WITH EBOS BALANCED SEND
+4dBu BALANCED EBOS OPTION AVAILABLE +4dBu BALANCED EBOS OPTION AVAILABLE
MIC SPLIT
-2dBu TO -70dBu
+10dBu TO -20dBu
INPUT
1
1
2
2
3
3
PIN 1 LIFT
REMOVE LINKS FOR TX OPTION
+48V
INPUT REAR CONN
SENS
PUSH
Ø
Block Diagrams
Input Module

Copyright Soundcraft
E. & O.E. 5/98
Issue l 5-98 ZL0474 (Std), ZL0475 (US)
Page 4
©
TECHNICAL DATA
OUT
L
R
STE
STE LINKING
AFL TRIM
AFL
OUT
L
R
SUMMING AMP
GRP 7A (1 OF 6 STEREO SENDS)
FADER
+10
INSERT
AFL
LOGIC
STE LINKING AFL LOGIC OUT AFL CLEAR
0dB STE MODE
-6dB MONO MODE
+10
-10
0
LOGIC BUS
LOWER MONO GROUP SHOWN UPPER MONO GROUP 1 OF 2 SHOWN GROUPS A AND B CAN BE CONFIGURED AS A STEREO
GRP 7A/8 (1 OF 6 SEND ENABLE LINES) STE
LOGIC
INSERT
-6dB
+10
SUMMING AMP
GRP 1(1OF6)
AFL
LOGIC
AFL
AFL TRIM
AFL LEFT
AFL RIGHT
GROUP BUS A
GROUP BUS L
GROUP BUSSES
AFL LEFT
AFL RIGHT
GROUP BUS A
GROUP BUS L
GROUP BUSSES
0
+10
-10
AFL LOGIC OUT AFL CLEAR
FADER
GLOBAL MUTE
MUTE 6dB DIM
6dB DIM
MUTE
MUTE
LOGIC
GLOBAL MUTE
OUTPUT TO DIM
OUTPUT TO DIM
TB/OSC BUS
TB/OSC BUS
TB
TB
EBOS
EBOS
EBOS
EBOS
EXT IN
EXT IN
+10
+10
ON
ON
TO OPTIONAL VU OVERBRIDGE
TO OPTIONAL VU OVERBRIDGE
GROUP OUTPUT AND
GROUP INSERT REAR CONNS
GROUP OUTPUT AND
GROUP INSERT REAR CONNS (Tx/MULTIPIN)
GROUP
OUTPUT
GROUP
OUTPUT
+20
+20
-20
-20
-30
-30
+15
+15
-15
-15
+10
+10
-10
-10
+5
+5
-5
-5
0
0
INSERT
RETURN
INSERT
RETURN
INSERT
SEND
INSERT
SEND
EXTERNAL
INPUT
EXTERNAL
INPUT
2
2
2
2
1
1
1
1
3
3
3
3
PUSH
PUSH
MUTE
LOGIC
Ø
Ø
å
å
å
å
Block Diagrams
Output Module

Copyright Soundcraft
E. & O.E. 5/98
Issue l 5-98 ZL0474 (Std), ZL0475 (US)
Page 5
©
TECHNICAL DATA
SUPPLY
RAIL
SENSE
CIRCUITRY
ALT
WEDGE R
OUTPUT
WEDGE R
OUTPUT
DELAY
LOGIC
MUTE
LOGIC
GROUP MUTE LOGIC BUS
XLR LOCATED ON MASTER XLRS LOCATED ON END CHEEKS
MUTE
ALL
GROUPS
WEDGE L
OUTPUT
ALT
WEDGE L
OUTPUT
PHONES
OUTPUT
PHONES
LEVEL
PHONES
DIM
MONO LOGIC
MONO
SOURCE
MONO
SOURCE
SOLO
CLR
PFL TRIM0
+10
-10
L POST FADE
R POST FADE
EXT AFL RIGHT OUT EXT AFL LEFT OUT EXT PFL OUT EXT AFL RIGHT IN
PFL DETECT
AFL DETECT
AFL LEFT BUS
AFL RIGHT BUS
PFL BUS
EXT AFL LEFT IN EXT PFL IN
I/P PRIORITY
AUTO CANCEL
ENBL ENBL
SOLO
LOGIC
L
R
&
EXT TB TO PHONES
FADER FADER
WEDGE DIM WEDGE DIM
TO OPTIONAL VU OVERBRIDGE TO OPTIONAL VU OVERBRIDGE
DIM
20dB
DIM
15dB
DIM
15dB
DIM
20dB
ALT
WEDGE
LEVEL
LAMP
DIMMER
IN
CALL
DETECT
EXTERNAL INPUT
INSERT SEND INSERT RETURN
GROUP OUTPUT
1
2
3
EBOS
ON
+10
L/R TO WEDGE
L POST FADE
R POST FADE
R POST MUTE
MUTE
LOGIC
+10
FADER
INSERT
AFL
LOGIC
STE
LOGIC
OSCILLATOR
OUTPUT
TB/OSC
ON ON ON
+10
OSC LEVEL
FREQ
TB
GAIN
63Hz
-20 FOH
ON ON
TALK TO
TALK TO
BUSSES
(TB/OSC)
TALK TO
OUTPUTS
(TB/OSC)
TB/OSC
15V CARRIER DETECT
EXT TB TO PHONES
15V
CARRIER ENABLE
WEDGE DIM PHONES DIM
OUTPUT
TB/OSC DIM
LOGIC BUS
GROUP OUTPUT DIM
TB/OSC BUS
GROUP BUSSES
TALKBACK LOGIC
1kHz
-50
x10
SRC
OSCILLATOR
TB MIC
ON REAR
FOH TALKBACK
OUTPUT
FOH TALKBACK
INPUT
1
1
1 1
2
2 2
3
3 3
2
3
TB MIC
ON MASTER
PUSH
PUSH
PUSH
PUSH PUSH PUSH
PUSH
PUSH
48V
+48V
PINK NOISE
GENERATOR
OSC TO
OUTPUTS
(TB/OSC)
OSC TO
ALL BUSSES
OSC TO
XLR O/P
1
2
3
STEREO SEND ENABLE
GRP L/R
STE LINKING
LOGIC BUS
STE LINKING AFL LOGIC OUT AFL CLEAR
AFL
AFL LEFT
AFL RIGHT
GROUP BUSSES L/R
STE
GRP L
AFL TRIM0
+10
-10
SUMMING
AMP
0dB STE MODE
-6dB MONO MODE
OUT
GLOBAL MUTE
ON
MUTE
EBOS
TO OPTIONAL VU OVERBRIDGE
TB/OSC BUS
TB
OUTPUT TB DIM
6dB DIM
EXT IN
LITTLITE
BLINK
OSCILLATOR
OUT CLEAR COM
ALT
WEDGE
LEVEL
ALT
WEDGE
ALT
WEDGE
WEDGE
MONO GROUP 1 OF 2 SHOWN GROUPS A AND B CAN BE CONFIGURED AS A STEREO PAIR
+20+20 +15+15 +10+10 +5+5 00 -5-5 -10-10 -15 -20 -30
-15 -20 -30
R L
PRE
ON
+10 +10
+10 +10
1
1 1
1
1
1
1
2
2 2
2
2
2
2
3
3 3
3
3
3
3
MUTE MASTERS
MUTE BUS
1 8
+5V ±17V +48V
Ø
å
å
å
å å
å
å
å
å
å å
å å å
GROUP OUTPUT AND GROUP INSERT REAR CONNS (Tx/MULTIPIN)
Block Diagrams
Master Module

Copyright Soundcraft
E. & O.E. 5/98
Issue l 5-98 ZL0474 (Std), ZL0475 (US)
Page 6
©
TECHNICAL DATA
TECHNICAL DATA
Architects Specifications
The Mixing Console shall be of a fully modular construction available in 32, 40, 48 and 56 input frames. The mixing console shall provide
a combination of between 20 mono and up to 7 stereo and 6 mono sends, depending on global switching. As standard, the console shall
be provided with 6 Triple Group Output modules and 1 double-width Master module. All frames will be supplied with a separate
CPS800 19 inch rack-mounting Power Supply. There shall be an optional VU Output Meterbridge for all sizes except the 32ch.
The Input Module shall have the following features; an electronically balanced low impedance input via an XLR socket with parallel con-
nection to a passive mic split output, continuously variable gain giving a sensitivity range of -2dBu to -70dBu (high gain range) and -20dBu
to +10dBu for high level inputs, switchable 48V phantom power, a variable 20-400Hz high-pass filter, phase reverse switch, by-pass-
able 4-band sweep equaliser 1kHz to 20kHz (HF) 450Hz to 12kHz (HMF), 60Hz-1.5kHz (LMF) and 12Hz to 350Hz (LF). The Q of the
two mid bands shall be variable from 0.5-3.0 and the HF and LF bands shall be switchable bell/shelving. All bands shall have a cut and
boost of 15dB (centre detented). 20 sends shall be provided via 6 single pots and 7 dual concentrics, with individual pre/post fader
switching (in pairs on dual concentrics) with internal selection to pre or post mute/EQ. The dual concentric sends act either as two
mono level controls or stereo level and pan, determined by global switching. Illuminated Solo and Mute switches shall control the main
signal path and allow the prefade signal to be monitored at all times. An 10 segment pre-EQ LED meter shall be provided, plus a sepa-
rate Peak LED to indicate internal levels within 6dB of clipping. Eight mute assign switches shall be fitted, with an additional Safe switch
for removing a channel from one of the eight mute groups. There shall be a link-selectable pre or post EQ insert point using separate
balanced send and return jacks. All connectors shall be integral with the main module.
The Output Module shall contain 3 identical output sections as follows; 100mm fader with 16-segment peak-reading LED meter, bal-
anced by-passable insert point, illuminated Mute switch and AFL switch, Group LR routing switches, Talkback switch and phase reverse.
An external line input shall be provided to allow console linking, with rotary level control and On switch. An AFL trim control shall be
provided with a range of +/-10dB. External inputs shall be connected via balanced XLRs; main outputs shall use electronically balanced
XLRs with a transformer option. A global mono/stereo mode switch allows the upper two output sections to be used as a stereo pair,
with automatic linked stereo AFL, and will switch the input send pots between mono and stereo operation. The AFL switches shall be
able to send a midi signal to an external BSS Varicurve system, to allow the remote selection of EQ pages on the BSS Remote.
The Master Module shall have a dual Grp L/R output section with identical facilities to those of the upper Output module, but not the
Grp LR routing switches. The Master module shall also contain a Talkback mic socket with routing to internal busses, FOH and external
output, variable frequency oscillator/pink noise generator, Solo Clear, Input Priority and Intercancel selection with PFL trim control,
stereo/mono engineers wedge fader, main/alternate wedge output selection, independent headphone socket and level control , 8 mute
group master switches and 2 x 16-segment LED L and R master meters.
A lamp dimmer control shall vary the brightness of three console mounted 4-pin XLR lamp sockets; one on each side cheek and one on
the master module.
The dimensions and specifications shall be as published elsewhere in this information. The console shall be the Soundcraft SM20.
Configuration Information
SM20 32 channel RW5422
SM20 40 channel RW5541
SM20 48 channel RW5542
SM20 56 channel RW5543
(Above consoles supplied with 1xCPS800 PSU)
SM20 40 ch Vu meterbridge RW5550
SM20 48 ch Vu meterbridge RW5551
SM20 56 ch Vu meterbridge RW5552
SM20 Mono Input Module RS2031
SM20 Output Module RS2032
SM20 Master Module RS2033
SM20 Blank Module PH1454-01
Spare CPS800 Power Supply RW8024
Spare User Manual ZM0226
Technical Manual ZM0227
Littlite 18 4pin XLR JB0155

Copyright Soundcraft
E. & O.E. 5/98
Issue l 5-98 ZL0474 (Std), ZL0475 (US)
Page 7
©
TECHNICAL DATA
Rear Connectors &
Level Diagram
-30
-20
-10
0dBu
+10 +20 +30
-30 -20 -10 0dBu
+10 +20 +30
Min Mic (-70dB)
AFL AFLPFL
INPUT MODULE OUTPUT MODULE MASTER MODULE
Max Line (+30dB) Max Mic (+18dB)
Min Line (-20dB)
Internal Clip (+20dB)
Ext In (+4dB) Insert (+4dB)
Insert (+4dB) Group Out (+4dB)
Ext AFL/ PFL In (+4dB) Ext AFL/
PFL Out (-2dB)
Wedge Out (+4dB) Phones (+4dB)
Phones Clip (+20dB)
Wedge Out Clip (+26dB)
Group Out Clip (+26dB)
T/B Dim (-22dB)

Copyright Soundcraft E. & O.E. 5/98
©
Harman International Industries Limited, Cranborne House, Cranborne Road , Potters Bar, Hertfordshire EN6 3 JN, UK
Tel:[phone] Fax: [phone] Sales Fax: [phone] Email: [email protected] http: / / www.soundcraft.com
Soundcraft US, Harman Pro North America Inc., Air Park Business Center 12, 1449 Donelson Pike, Nashville, TN 37217, USA.
Tel:[phone] Fax: [phone]
TECHNICAL DATA
Iss. l 5/98 ZL0474 (Std), ZL0475 (US) Page 8
795.80 (31.33")
722.80 (28.46")
373.40 (14.70")
277.88 (10.94")
25.0 (1.00")
125.70
(4.95")
32ch frame
40ch frame
48ch frame
56ch frame
Overall Width
1366mm (53.8“)
1620mm (63.78“)
1874mm (73.78")
2128mm (83.78")
Console
SM20 Specifications
FFrreeqquueennccyy RReessppoonnssee
XLR Input to any Output 20Hz - 20kHz, +0/-0.5dB
TToottaall HHaarrmmoonniicc DDiissttoorrttiioonn
All measurements at +20dBu
Line In to Group or Mix Out Less than 0.005%
@1kHz
Less than 0.025%
@10kHz
NNooiissee
22Hz - 22kHz bandwidth, unweighted
Mic input Equivalent Input Noise Less than
-127.5dBu (200Ωsource)
Group Output Noise Less than -80dBu
(40 ch routed)
Mix Output Noise Less than -80dBu
(40 ch routed)
CCrroossssttaallkk
All measurements at 1kHz
Input Channel Muting Greater than 100dB
Input Channel Send Pot Isolation Greater than 100dB
Group Fader Isolation Greater than 95dB
Group to Group Crosstalk Less than -90dB
Group to XLR Crosstalk Less than -90dB
IInnppuutt aanndd OOuuttppuutt IImmppeeddaanncceess
Input 2kΩbalanced
All Insert Sends Less than 75Ωbalanced
All Insert Returns Greater than 10kΩ
balanced
Outputs Less than 75Ωbalanced
IInnppuutt//OOuuttppuutt CCaappaabbiilliittyy
Maximum Input Level +30dBu
All Insert Sends +20dBu into 2kΩ
All Insert Returns +26dBu
All Balanced Outputs +26dBu into 1kΩ
Headphone Output +20dBu into 600Ω
1W into 8Ω
IInnppuutt aanndd OOuuttppuutt LLeevveellss
Input Sensitivity (XLR) -2dBu to -70dBu,
+10dBu to -20dBu
Input Insert Send/Return -2dBu nominal
Output Insert Send/Return +4dBu nominal
Outputs +4dBu for 0VU
Dimensions