Cooper Sound CS306 User manual

645 Main Street, Suite C
Morro Bay
CA
Phone: [phone]
Fax: [phone]
,
http://www.coopersound.com
93442-2273
USA
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Cover Page
CS306 PROFESSIONAL AUDIO MIXER
OPERATOR’S MANUAL

CS306
Cooper Sound Systems, Inc.
TABLE OF CONTENTS
INPUT CHANNEL DESCRIPTION…………………………...……………....……….1
OUTPUT MODULE DESCRIPTION………………………………………..………....2
REAR PANEL DESCRIPTION………………………………………..…….………….3
BLOCK DIAGRAM..……………………………………….…………………………….4
STEREO MODULE (OPTIONAL)………………...………………………….………...5
PIN OUTS...............................................................................................................6
SPECIFICATIONS
SPECIFICATIONS……………………………………..………………......…………7,8
OPERATION & APPLICATION NOTES.………………………………........……9,10
APPLICATION NOTES
REMOTE ROLLS….....……………………………….……………………………….11
COMMUNICATIONS IN……………………………………………..............……….12
CABLE WIRING…………………….………………………………………………….13
WARRANTY……………………………………………………………………………14
Table of Content
Table of Content

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2
METER BRIDGE (audio)
1. DYN/PH: Dynamic or phantom power (48 v)
Dynamic is no power.
2. Mic/Line: Microphone or line level in. Switching to line
automatically turns off mic power.
3. ø: Audio phase; N = normal phase,
R = reverse phase
4. Pad: Attenuator to reduce either mic or
line input levels
INPUT CHANNEL
1. Gain: Mic/line preamp gain
2. HP 1: High pass filter (see specs)
3. HP 2: High pass filter (see specs)
4. O/L: Near overload indicator
5. PFL: Pre fade listen
6-9. A,B,C,D: Channel to mix bus assigns: L (left),
R (right) indicate monitor & pan pot
assignment (center position is off)
10. LIM+LED: The limiter is a symmetrical peak
detecting type & is completely out
of circuit when switched off.
The LED indicates limiter action.
11. Thres: Limiter threshold: Clockwise = lower
threshold
12. Pan (switch): Switching the pan switch to the left
disengages the panpot. Crosstalk is
therefore minimized and the output
levels will remain equal.
13. Pan (pot): (L) = A & or C
(R) = B & or D
14. Channel fader
INPUT MODULE
MODEL CS306
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1
2
3
5
6
7
8
9
4
24
25
12
13
1
3
4
2
26
27
18
19
16
17
11
10
14
15
22
23
21
20
Meters:
1. Controls LED brightness. Use lowest
setting possible to conserve current
consumption.
2. B. TST: Battery test (see specs)
3. PK/VU: The mixer is configured for either VU
or Peak response meters.
PK: The reference tone is at -8 dB
VU: The reference tone is at 0 dB.
4. OL: ‘Overload’ - Indicates near clip level. This
LED has a slower release time than the
others.
MONITOR 2
1. Level: Monitor 2 gain adjustment
2-5. A,B,C,D Assigns busses to Monitor 2 output
6-9. Master Faders: ABCD - Normally left at maximum for
optimum headroom & signal to noise ratio.
10. Level (monitor 1):Gain adjustment
11. PL: Private line assign to Monitor 1
12. COMM: Communications return (talkback) to Monitor
1 only (See application note for 2 returns)
The multiturn trimmer above this Switch
adjusts the level.
13. MIC: Internal slate mic & gain adjustment
14. TAPE/DIR : (monitor 1) Tape or Direct to Monitor 1
15. M/ST/MS : (monitor 1) M = mono, ST = stereo, MS = mid-side
Any combination selected by switches
(16-19) can be monitored in mono, stereo
or mid-side.
16-19. SOLO/OFF/ON Any combination of busses can be
A,B,C,D: monitored. ‘SOLO’ disconnects the other
busses to the Monitor 1 output - Solo
mono’s the signal to the headphone out.
‘ON’ - In stereo mode the busses are
assigned to either (L) left or (R) right.
20. Power: Internal or external power (center off)
(LED: Turns off at minimum input voltage.)
21,23. Returns: Trim pots (multiturn) to adjust return (tape)
level to Monitor 1 and the meters
22. TAPE/DIR : (meters) Tape/Direct: Meters indicate the return
signals.
OSCILLATOR SECTION
24. OSC: Internal oscillator: Up = on, Down = momentary on.
Trimmer (multiturn) above adjusts level
25. Slate: Slate mic on
26. PL: Private line to Monitors 1 & 2. The level is
adjusted by the multiturn trimmer above. (See #11)
27. Roll: Remote control for many types of recorders (see
separate application note).
Up = Roll; Down = Stop/Pause
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OUTPUT MODULE
MODEL CS306

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2
1
4
9
10
13
12
11
5
6
7
8
LEFT TO RIGHT
1. MONI 2: Monitor 2 output - For mono headphones (or mono wireless
communications)
2. FUSE: 2.5 A (5 x 20 mm)
3. PWR: External power Pin 1 = Negative DC, Pin 3 = Battery charge
(positive), Pin 4 = Positive DC (see specifications)
4. Balanced outs (XLR): A,B,C,D
5. In/Out: Balanced outputs and balanced (tape) returns (AB: in/out,
CD: in/out)
6. COMM In: Communications input to Monitor 1 (balanced, line level)
7. ROLL: Remote control for various recorders
8. ACC: Not used. Machined for a DB9 connector.
9. Unbalanced outs (DB9): A,B,C,D
10. MIX Bus IN: A,B,C,D (current input, see specifications)
11. XLR Inputs: Balanced (mic or line level)
12. Jacks: Channel direct outs, post fader (unbalanced)
13. Channel outs: Pre fade channel outputs (+4dBU balanced) for multitrack recording
CH. 7 & 8 are the A & B mix bus balanced outputs
REAR PANEL
MODEL CS306
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June 2006

+4dBu
phase
2
3
Pad
mic
power
post fade jack
channel outs
pan
pot
pan
switch
osc./slate
unbalanced out
DB9
monitors
& meter buffers
balanced out
master
XLR & video
PFL
M/ST/MS PL
comm
PL
ABCD monitor 2
dir/tape drivers
batt test
returns
Meters
DB25
CS306 block diagram
mic
line
+4dBu AB out
only
DB25
(CH 7,8)
pre amp
HP1 & 2
channel
fader
OL
Lim.
A
B
C
D
PFL
xfmer
driver
dir/tape
returns
assign/
solo
AC
BD
Monitor 1
L
R
AB C D
ABC D
PFL
XLR
prefade
Mono Inputs
Outputs
bus assign
123
1 = HP 1
2 = HP 2
3 = HP 1 + HP 2
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BLOCK DIAGRAM
MODEL CS306

1 2
pre amp
HP1 & 2
channel
fader
OL
Lim.
pan
pot
AB C D
bus assign
pre fader
pre amp
HP1 & 2
channel
fader
pan
pot
pre fader
MS
limiter
link
A
B
C
D
post fader
post fader
stereo block diagram
A
B
C
D
OL
Lim.
CH 1/3/5
CH 2/4/6
CH
link
CH out (1/3/5)
CH out (2/4/6)
post jack
post jack
PFL
PFL
STEREO INPUT CHANNEL
Any pair of mono channels can be converted to stereo pairs.*
The cosmetic difference is that the Pan out switches are
replaced with Link & MS Decode switches with LEDs above.
1. Link: Both channels (odd & even) are linked together with one
stereo fader on the odd channel - the even channel fader is
disconnected from the circuit. ‘Link on’ also links the two
limiters.
2. MS DEC: MS Decode - The even channel output is inverted to bus B
only. Both pan pots should be centered. With equal gain,
the M/S mic configuration is decoded to 50%.
Odd channel = mid, Even channel = side.
The result will be:
A bus = M + S = L, B bus = M - S = R
The stereo image width can be changed by altering the gain
of one channel.
Note: A & B assign switches should be on for both channels.
C & D busses are now pre pan pot (& inverter), allowing a non decoded MS
mic configuration to be recorded, pre or post fader to C & D busses.
MS mic configuration can also be recorded via the pre fader channel outs.
Note: For decoding MS to the monitor only - see output section.
*A retrofit kit is available.
CSST-STEREO MODULE
MODEL CS306
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XLR 3M & XLR 3F
Pin 1 = Ground
Pin 2 = High
Pin 3 = Low
Monitor 1 Monitor 2
1/4” stereo jack (max. load = 25!per channel) 1/4” mono jack (max. load = 25!)
Tip = Left Tip = Signal
Ring = Right Sleeve = Ground
Sleeve = Ground
Direct Out Comm. In
(post fader) TQG3M
1/4” mono jack Tip = Signal Pin 1 = Ground
Sleeve = Ground Pin 2 = High
Pin 3 = Low
Mix Bus In Video 10 pin:
DB9 1 = Ground
2 = D 1 + A,C out
3 = C 2 - A,C out
4 = A
5 = B 3 + B,D out
(current input, see specifications) 4 - B,D out
Outputs 5 + B,D in
DB9 1 = Ground 6 - B,D in
2 = A
3 = B 7 + A,C in
4 = C 8 - A,C in
5 = D
9 Ground
10 Ground
Roll (See application note) Channel Outputs DB25
TQG 5M Pin 1 = -10 v (Nagra) Pin Pin
Pin 2 = Stop (Nagra) Ch. 1 Hot 24 Ch. 5 Hot 18
Pin 3 = Pause/Stop (DATs) Cold 12 Cold 6
Pin 4 = Common (DATs) Ground 25 Ground 19
Pin 5 = Record (DATs)
Ch. 2 Hot 10 Ch. 6 Hot 4
Cold 23 Cold 17
Power Ground 11 Ground 5
XLR-4M Pin 1 = Ground (-)
Pin 2 = N/C Ch. 3 Hot 21 A Out Hot 15
Pin 3* = Battery charge (+) Cold 9 (Ch. 7) Cold 3
Pin 4 = External power in (+) Ground 22 Ground 16
*Do not connect if rechargeable
batteries are not installed. CH. 4 Hot 7 B Out Hot 1
Cold 20 (Ch. 8) Cold 14
Ground 8 Ground 2
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PIN OUTS
MODEL CS306

General: (0 dBu = .775v RMS)
Dimensions: 11.5” x 10.8” x 4.0” (292 x 274 x 102 mm)
Weight with no batteries: 9.5 lbs. (4.3 kg)
Overall distortion (THD + N): < 0.01% (0.003% typ.)
Equivalent input noise: (150!20-20 kHz) -129 dBu
(150!‘A’ WT’D) -131 dBu
Standard Configuration:
All XLR-3 audio connectors are Pin 2 hot.
Levels are set as specifications.
Meter types should be specified at time of purchase.
Power Requirements:
External: 10v - 18 v operating range
Internal: 8 ‘AA’ cells
Consumption !500 mA at 12v DC, 6 watts
Estimated battery life with: NP1, Nicad > 4.5 hours
NP1, Nmh > 7.5 hours
8 AA alkaline cells > 3.5 hours
(Nicad AA cells are !1/3 the capacity of alkaline cells)
Battery test: +13.5v DC = +2
+12v DC = 0
+11v DC = -2
+10v DC = -4 (change batteries)
+9v DC = -6 (minimum)
Power on LED: Turns off when the voltage is 9v or less
Power cut off voltage: 8 v DC (internal supply switches off)
48v Phantom: 48v +/- 1v
System Power Connections and Precautions:
RE: (+) chassis equipment
Analog Nagras must have a separate supply, with no common power supply connections to the
mixer or other (-) chassis equipment.
SPECIFICATIONS
MODEL CS306
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June 2006

Input: Reference: -8 PPM, 0 VU (XLR’s are Pin 2 high)
Mic In: Minimum input level -80 dBu (Z in 1.4k !)
Maximum input, line position (no pad) +30 dBu (Z in 10k !)
Pad 15 dB Z in "600 !
Mic/Line 40 dB Z in "10k !
Combined 55 dB Z in "10k !
High Pass Filters: HP 1 70 Hz 12 dB/oct.
HP 2 110 Hz 12 dB/oct.
HP1 & HP2 180Hz 12 dB/oct.
Direct out (post-fader): -8 dBu, Zout = 47!
Channel Outs: +4 dBu, balanced, Zout = 100!
O/L indicator: -3 dB MOL
Limiter: Threshold Variable 0 PPM to M.O.L. (+4 PPM typ.)
Attack 1 ms
Release 150 ms
(M.O.L. = maximum output level = 25 dBu on XLR outs, +19 dBu on unbalanced outs)
Pan Pots: Center = -3 dB
All specifications are measured with the pan pots panned either L or R or switched out.
Output: Reference: -8 PPM, 0 VU (XLR’s are Pin 2 high)
XLR & 10-pin balanced outputs: (A,B,C,D) +4 dBu, Zout "100!
DB 9 unbalanced outputs: (A,B,C,D) -2 dBu, Zout "100!
Monitor 1 out: 0 dBu no load
0 dBu 60!load
Maximum load is 25!for each output.
Monitor 2 out: 0 dBu no load
-8 dBu 60!load
Maximum load is 25!.
Tape return (balanced): -14 dBu to +19 dBu Zin = 10k !
Communication in (balanced): -14 dBu to +19 dBu Zin = 10k !
Mix bus in - current input - series resistor: 10k !-8 dBu (-10 dBV)
(needs series resistors) 20k !-2 dBu
40k !+4 dBu
Oscillator frequency: 500 HZ
Signal (M.O.L.) to noise of output section:
(Dynamic range)
(Channel faders off, masters at max): -115 dB 20-20 kHZ
Warning: The monitor outputs of this mixer are capable of driving low-impedance headphones at a very high
level. Before headphones are in use, set all monitor levels to minimum. Prolonged listening at high
volumes might affect your hearing.
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SPECIFICATIONS
MODEL CS306