PANASTEREO SP23 User manual

63
DIGITAL CENTRE-SURROUND PROCESSOR
OWNER'S MANUAL

TABLE OF CONTENTS
OVERVIEW 3
SYSTEM FEATURES 3
SYSTEM SPECIFICATIONS 3
SP23 OPERATION 4
EMERGENCY BYPASS 4
SP23-10 (OCTAVE EQUALISERS) CARD POSITIONS 4
SP23-30 (1/3 OCTAVE EQUALISERS) CARD POSITIONS 4
SP23 INSTALLATION 5
CONNECTING THE INPUTS TO THE SP23. 6
CONNECTING THE SP23 OUTPUTS. 7
AUTOMATION INTERFACE - 25-PIN D-CONNECTOR CONNECTION DATA 9
SYSTEM ALIGNMENT 10
1 – ALIGNMENT WITH PANASTEREO PROCESSORS 11
2 – ALIGNMENT WITH DOLBY CP55 16
3 – ALIGNMENT WITH DOLBY CP65 21
4 – ALIGNMENT WITH DOLBY CP500 26
5 – ALIGNMENT WITH SMART MOD VI WITH DSP MATRIX 30
6 – ALIGNMENT WITH SMART MOD VI WITH ANALOG MATRIX 35
7 – ALIGNMENT WITH SMART MOD IIC 39
8 – ALIGNMENT WITH ULTRA STEREO JSX1000 43
Surround EX is a trademark of Dolby Labs, Inc.
PANALOGIC CORPORATION PTY LIMITED
Ground floor, 44 Carrington Road
Castle Hill, NSW 2154
Australia
Phone: [phone]
Fax: [phone]
Email: [email protected]
Web: www.panalogic.com

PANASTEREO SP23 – Operation.
3
PANASTEREO SP23 DIGITAL SURROUND PROCESSOR
OVERVIEW
The Panastereo SP23 Surround Processor decodes 6.1 channel sound from existing digital
5.1 installations. The SP23 works with any brand of 5.1 digital sound processor is inserted between
the left and right surround outputs of the sound processor and the surround amplifiers. The SP23
provides a decoded rear surround channel which can be fed to rear wall surround speakers via a rear
surround amplifier.
SYSTEM FEATURES
•High performance matrix decoding of centre (rear) surround information.
•Choice of 10 band octave (SP23-10) or 30 band 1/3 octave (SP23-30) equalisers for all three
surround channels.
•Users with Panastereo processors can re-use the surround equaliser card from the cinema
processor in the SP23 to save the cost of duplication.
•Provides three channel mono surround for stereo analogue soundtracks.
•Balanced inputs and outputs for hum and buzz free installation.
•Superb noise and distortion performance.
•EX decode and input level LED indicators.
•CSP1200 / CP65 pin compatible 25way D automation connector.
•Input / output connections via plug-in Phoenix connectors.
•Power-off bypass and manual bypass facility.
•Built-in power supply module.
•1U standard rack mount chassis with front accessible plug in card modules.
•Designed and manufactured in Australia.
•Fullycompatible with the DolbyDigital Surround EX(TM) format planned for Star Wars and other films to
follow.
SYSTEM SPECIFICATIONS
Inputs: Ls and Rs inputs, 10k ohm balanced, Max input sensitivity: 220mV.
Outputs: Ls, Rs, Csl ,Csr. 100 ohm balanced, Max output level +20dBu.
Noise: Typically 78 dB (unweighted) 86dB (A weighted)
Distortion (any channel) 1kHz @ Dolby level: 0.03%
Dynamic Range: Typically 106dB
Dimensions: 430mm (W) x 247mm (D) x 44mm (H)
Weight:: 4.2kg

PANASTEREO SP23 – Operation.
4
SP23 OPERATION
The SP23 does not require any operator intervention for normal operation. The unit is automatically
controlled by the cinema processor.
When a digital format is selected on the cinema processor the SP23 will switch to EX decode mode
and the red DECODE-ON indicator will be illuminated. In Digital mode the left and right surround
channel information is decoded into three channels, left, right and rear surround.
When any other format is selected on the cinema processor, the SP23 will switch to non-EX mode and
the yellow DECODE-OFF indicator will be illuminated. In non-EX mode, if the surround channel
information is mono (as with optical stereo film soundtracks), the surround signal is equally distributed
to all three surround channels. If the surround signal is stereo, the left surround channel contains the
left signal, the right surround channel contains the right signal and the rear channel contains both
signals.
EMERGENCY BYPASS
In the event of a failure of the unit, it can be bypassed by pressing the red BYPASS button at the right
front of the unit. This button is NOT a power switch but simply allows the left and right surround
channels from the processor to be sent directly to the left and right surround power amplifiers. There
is no rear surround in bypass mode.
SP23-10 (Octave Equalisers) card positions
SP23-30 (1/3 Octave Equalisers) card positions

PANASTEREO SP23 – Installation.
5
SP23 INSTALLATION
RACK MOUNTING THE SP23
The SP23 can be mounted anywhere in the sound rack, although it is preferable from a wiring point of
view to mount the unit between the sound processor and the amplifiers. Provision should be made for
ventilation above the SP23, so avoid mounting the unit directly beneath other equipment that will
prevent air circulation at the top of the SP23 chassis.
REAR SURROUND SPEAKER AND AMPLIFIER REQUIREMENTS
The rear wall surround speakers should be ideally of the same type as the side wall speakers to allow
the best match in sound quality between the side and rear wall speakers. The rear wall amplifier and
speaker system should have sufficient power handling capability to match that of either side wall
system. The number of rear wall speakers will be determined by the width of the auditorium – the
wider the room the more speakers will be needed. The spacing between each of the rear speakers
should be no greater than the spacing between each of the side wall speakers.
INSTALLATION IN A TWO LEVEL CINEMA
The Panastereo SP23 can be easily adapted to dual level cinemas. Such cinemas, which are usually
large older style cinemas, typically have an upstairs balcony and a downstairs stalls area beneath the
balcony. For such cinemas, rear wall surround speakers will be required both upstairs and
downstairs. In such cases the rear left output can be used to drive the upstairs speakers and the rear
right output can be used to drive the downstairs speakers. In the SP23-10 there are separate
equalisers for rear left and rear right channels so the upstairs and downstairs rear speaker systems
can be separately equalised for optimum results.
CONTROL & AUTOMATION CONSIDERATIONS
The automation connector on the SP23 is pin compatible with Panastereo CSP1200, Panastereo
CSP4200, Dolby CP65 and Dolby CP500 processors. When a standard pin for pin cable is used with
any of the above processors, the rear surround decoding will be turned on for any digital or magnetic
format and turned off for all other formats. For use with other processors, or if it is desired to alter
which formats turn the decoding on or off, it will be necessary to make a custom cable. In this case,
reference should be made to the automation pinout table in this manual.

PANASTEREO SP23 – Installation.
6
CONNECTING THE INPUTS TO THE SP23.
SOUND PROCESSOR WITH UNBALANCED OUTPUTS (DOLBY, SMART, ULTRA STEREO)
Disconnect the left surround and right surround connections at the sound processor outputs.
Use two-core shielded audio cable to connect the left and right surround outputs from the sound
processor to the left and right inputs of the SP23.
Connect the “+” terminal from each sound processor output to the “+” terminal of each corresponding
SP23 input.
Connect the ground terminal of each processor output to the “-“ terminal of each corresponding SP23
input.
Connect the cable shield to the “E” terminal of each SP23 input only. Do not connect the shields at
the sound processor.
SOUND PROCESSOR WITH BALANCED OUTPUTS (PANASTEREO)
Disconnect the left surround and right surround connections at the sound processor outputs.
Use two-core shielded audio cable to connect the left and right surround outputs from the sound
processor to the left and right inputs of the SP23.
Connect the “+” terminal from each sound processor output to the “+” terminal of each corresponding
SP23 input.
Connect the “-“ terminal of each processor output to the “-“ terminal of each corresponding SP23
input.
Connect the cable shield to the “E” terminal of each SP23 input only. Do not connect the shields at
the sound processor.
AUTOMATION CABLE
The SP23 must be connected to the cinema processor or digital processor automation connector.
The SP23 D25 automation connector is pin compatible with Panastereo CSP42000, CSP1200, Dolby
CP65 and CP500 processors.
A pre-made 25 way ribbon cable is supplied with the SP23 for the above processors.

PANASTEREO SP23 – Installation.
7
CONNECTING THE SP23 OUTPUTS.
AMPLIFIERS WITH UNBALANCED INPUTS
Use two-core shielded audio cable to connect the left, right and rear surround outputs from the SP23
to the inputs of the amplifiers.
Connect the “+” terminal from each SP23 output to the “+” terminal of each corresponding amplifier
input.
Connect the ground terminal of each SP23 output to the “-“ terminal of each corresponding amplifier
input.
Connect the cable shield to the “E” terminal of each amplifier input only. Do not connect the shields at
the sound processor.
AMPLIFIERS WITH BALANCED INPUTS
Use two-core shielded audio cable to connect the left, right and rear surround outputs from the SP23
to the inputs of the amplifiers.
Connect the “+” terminal from each SP23 output to the “+” terminal of each corresponding amplifier
input.
Connect the “-“ terminal of each SP23 output to the “-“ terminal of each corresponding amplifier input.
Connect the cable shield to the “E” terminal of each SP23 input only. Do not connect the shields at
the amplifier.
SP23 Rear Panel

PANASTEREO SP23 – Installation.
8
SETTING THE EQUALISER MODE JUMPERS
The SP23 has three EQUALISER MODE jumpers on the CM126 Power Supply/Control Card.
The jumpers are marked LK1 – 3
The jumpers are factory set to match the equaliser configuration as shipped from the factory.
LK1 – Selects the input for the third equaliser slot (the upper middle slot).
•If the SP23 is fitted with 1/3 octave equalisers for the left and right surround channels (left eq in
upper left slot, and right eq in upper middle slot) then this jumper should be in the left “RS”
position. This ensures that the right surround signal from the matrix is fed to the right surround
equaliser
•If the SP23 is fitted with a stereo octave equaliser for the left and right surround channels (upper
left slot), AND a 1/3 octave equaliser is fitted to the upper middle slot AND you wish to use the
future L-R output from the SP23 this jumper must be in the right “L-R” position.
LK2 – Selects octave or third octave equaliser mode for the left and right equalisers.
•If the SP23 is fitted with a stereo octave equaliser for the left and right surround channels (upper
left slot), this jumper should be in the left “OCT” position.
•If the SP23 is fitted with 1/3 octave equalisers for the left and right surround channels (left eq in
upper left slot, and right eq in upper middle slot) then this jumper should be in the right “1/3”
position.
LK3 – Selects stereo or mono equaliser mode for the rear surround equaliser.
•If the SP23 is fitted with a 1/3 octave equaliser for the rear surround channel (bottom middle slot)
this jumper should be in the left “CS” position. (This will feed the output from the equaliser to
both left and right rear outputs).
•If the SP23 is fitted with a stereo octave equaliser for the rear surround channel (bottom middle
slot) and you wish to use just the left equaliser for both the left rear and right rear channels, this
jumper should be in the left “CS” position. (This will feed the left equaliser output to both the left
and right rear outputs).
•If the SP23 is fitted with a stereo octave equaliser for the rear surround channel (bottom middle
slot) and you wish to use separate equalisers for the left rear and right rear channels, this jumper
should be in the right “L-R” position.
•If the future fourth surround channel is used, the right rear output will carry this signal if this jumper
is in the right “L-R” position.

PANASTEREO SP23 – Installation.
9
AUTOMATION INTERFACE - 25-PIN D-CONNECTOR CONNECTION DATA
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SP23 automation connector pins 1-8 should be pulled low (connected to pin 12) to select a format.
Pins 1, 2, 3, 4 & 7 select “decode off”.
Pins 5, 6 & 8 select “decode on”.

PANASTEREO SP23 – Alignment.
10
SYSTEM ALIGNMENT
Refer to the appropriate section of the manual for alignment with various sound processors.
1 – Panastereo CSP3200, CSP4200, CSP1200
2 - Dolby CP55
3 – Dolby CP65
4 - Dolby CP500
5 - Smart MOD 6 with DSP Matrix
6 - Smart MOD 6 with Analog Matrix
7 - Smart MOD IIC
8 – Ultra Stereo JSX 1000

PANASTEREO SP23 – Alignment with PANASTEREO PROCESSORS
11
1 – ALIGNMENT with PANASTEREO PROCESSORS
Equipment required: CM218 Pink Noise Card, Real Time Analyser (RTA)
1. SET UP REAL TIME ANALYSER Set up a Real Time Analyser and position the
microphones in the auditorium.
2. PRE-SET SP23 OUTPUT LEVELS Turn all four output trimmers on the SP23
anticlockwise until you feel a slight click.
3. SWITCH SP23 TO BYPASS Switch the SP23 to bypass mode (Red Bypass
button IN).
4. BYPASS SURROUND EQUALISERS At the rear of the Panastereo processor,
switch the Surround Equaliser Bypass switch
to the BYPASS position. If necessary remove
the surround equaliser card from the
processor and place it in the top left slot of the
SP23.
5. INSTALL PINK NOISE CARD Remove the CM224 Matrix Decoder card from
the CSP sound processor and install the pink
noise generator in it’s place.
6. SELECT “OPTICAL STEREO” FORMAT Select “Optical Stereo” on sound processor to
output pink noise to the auditorium.
7. SET PROCESSOR VOLUME TO “7.0” Set the sound processor volume control to
level “7.0” and keep it there for all subsequent
adjustments.
8. CHECK SPL LEVELS ON ALL
CHANNELS Check that the SPL levels for all of the
channels are correct (85dBC per channel). If
not, adjust the output level trimmers on the
CM329 or CM349 Audio Output card for a
level of 85dBC from each channel.
9. SELECT “DIGITAL” FORMAT Select the sound processor to DIGITAL
format. Check that the red “DECODE-ON”
LED is illuminated on the SP23

PANASTEREO SP23 – Alignment with PANASTEREO PROCESSORS
12
10. REMOVE AUTOMATION CONNECTION Disconnect the D25 automation cable from the
SP23. (This is to prevent the sound processor
from switching the SP23 back to Optical
mode)
11. SELECT “OPTICAL STEREO” FORMAT Select the sound processor to OPTICAL
STEREO (to send pink noise to the outputs).
12. TURN OFF SP23 BYPASS Switch the SP23 out of bypass mode (Red
Bypass button OUT).
13. SET PINK NOISE CARD TO LS Switch on the Left Surround button on the Pink
Noise card.
14. ADJUST SP23 LS INPUT LEVEL Adjust the Left Input trimmer on the SP23 so
that the two green LEDs for the left channel
are equally illuminated.
15. COARSE SET LS SPL LEVEL TO 85dBC Adjust the Left Surround Output trimmer on
the SP23 for approximately 85dBC in the
auditorium.
16. EQUALISE LEFT SURROUND CHANNEL Remove the Left/Right Equaliser card from the
SP23 and connect it via the extender card and
cable. Adjust the left equaliser controls for a
frequency response in accordance with the
standard ISO surround channel response
curve.
17. SET LS SPL LEVEL TO 85dBC Re-adjust the Left Surround Output trimmer on
the SP23 for 85dBC in the auditorium.
18. SELECT RIGHT SURROUND ON THE
PINK NOISE CARD Switch off the Left Surround button and press
the Right Surround button on the Pink Noise
Card.
19. ADJUST SP23 RIGHT SURROUND
INPUT LEVEL Adjust the Right Input trimmer on the SP23 so
that the two green LEDs for the right channel
are equally illuminated.
20. COARSE SET RIGHT SURROUND SPL
LEVEL TO 85dBC Adjust the Right Surround Output trimmer on
the SP23 for approximately 85dBC in the
auditorium.

PANASTEREO SP23 – Alignment with PANASTEREO PROCESSORS
13
21. EQUALISE RIGHT SURROUND
CHANNEL Adjust the right equaliser controls for a
frequency response in accordance with the
standard ISO surround channel response
curve.
22. SET RIGHT SURROUND SPL LEVEL TO
85dBC Re-adjust the Right Surround Output trimmer
on the SP23 for 85dBC in the auditorium.
23. SELECT BOTH LS AND RS ON PINK
NOISE CARD Switch on both left and right surround on the
Pink Noise Card
24. IF A TWO CHANNEL REAR SURROUND
AMPLIFIER IS INSTALLED GOTO 31
25. COARSE SET LEFT REAR SURROUND
SPL LEVEL to 85dBC Adjust the Rear Left Surround Output trimmer
(CSL) for approximately 85dBC SPL in the
auditorium.
26. EQUALISE REAR SURROUND
CHANNEL Remove the Rear Equaliser from the SP23
and connect it via the extender card and cable.
Adjust the left equaliser controls for a
frequency response in accordance with the
standard ISO surround channel response
curve.
27. SET REAR SURROUND SPL LEVEL TO
91dBC Replace the Rear Equaliser card and adjust
the Rear Left Surround Output trimmer (CSL)
on the SP23 for 91dBC in the auditorium.
28. RE-CONNECT AUTOMATION CABLE Re-connect the automation cable to the SP23.
29. REMOVE PINK NOISE CARD Remove the pink noise card from the
processor and replace with the CM224 matrix
card.
30. END OF PROCEDURE The system is now ready to use.
31. ALIGNMENT OF TWO CHANNEL REAR
SURROUND AMPLIFIER

PANASTEREO SP23 – Alignment with PANASTEREO PROCESSORS
14
32. TURN OFF REAR RIGHT AMPLIFIER Switch off or disconnect the rear right-
surround amplifier.
33. COARSE SET REAR LEFT SURROUND
SPL LEVEL to 85dBC Adjust the Rear Left Surround Output trimmer
(CSL) for approximately 85dBC SPL in the
auditorium.
34. EQUALISE REAR LEFT SURROUND
CHANNEL Remove the Rear Equaliser from the SP23
and connect it via the extender card and cable.
Adjust the left equaliser controls for a
frequency response in accordance with the
standard ISO surround channel response
curve.
35. SET REAR LEFT SURROUND SPL
LEVEL TO 88dBC Adjust the Rear Left Surround Output trimmer
(CSL) on the SP23 for 88dBC in the
auditorium.
36. TURN OFF LEFT REAR AMPLIFIER AND
TURN ON RIGHT REAR AMPLIFIER Switch off or disconnect the rear left-surround
amplifier and switch on or connect the rear
right surround amplifier.
37. COARSE SET RIGHT REAR SURROUND
SPL LEVEL to 85dBC Adjust the Rear Right Surround Output
trimmer (CSR) for approximately 85dBC SPL
in the auditorium.
38. EQUALISE REAR RIGHT SURROUND
CHANNEL Adjust the right equaliser controls for a
frequency response in accordance with the
standard ISO surround channel response
curve.
39. SET REAR RIGHT SURROUND SPL
LEVEL TO 88dBC Replace the Rear Equaliser card and adjust
the Rear Right Surround Output trimmer
(CSR) on the SP23 for 88dBC in the
auditorium.
40. TURN ON REAR LEFT AMPLIFIER Switch on or re-connect the rear left surround
amplifier.
41. RE-CONNECT AUTOMATION CABLE Re-connect the automation cable to the SP23.
42. REMOVE PINK NOISE CARD Remove the pink noise card from the
processor and replace with the CM224 matrix
card.

PANASTEREO SP23 – Alignment with PANASTEREO PROCESSORS
15
43. END OF PROCEDURE The system is now ready to use.

PANASTEREO SP23 – Alignment with DOLBY CP55
16
2 – ALIGNMENT with DOLBY CP55
Equipment required: Dolby Cat.85C Pink Noise Card, Real Time Analyser (RTA)
1. SET UP REAL TIME ANALYSER Set up a Real Time Analyser and position the
microphones in the auditorium.
2. PRE-SET SP23 OUTPUT LEVELS Turn all four output trimmers on the SP23
anticlockwise until you feel a slight click.
3. SWITCH SP23 TO BYPASS Switch the SP23 to bypass mode (Red Bypass
button IN).
4. SET THE CP55 SURROUND
EQUALISERS TO FLAT On the CP55 Cat.441 card, turn the Treble
and Bass controls for both the Ls and Rs
channels to the middle of their rotation. Turn
the midrange cut control for both Ls and Rs
channels fully clockwise
5. INSTALL PINK NOISE CARD Remove the Cat.150 Decoder card from the
CP55 sound processor and install the Cat.85C
pink noise generator into the slot provided.
6. SELECT “OPTICAL STEREO”
FORMAT Select “Optical Stereo” on sound processor to
output pink noise to the auditorium.
7. SET PROCESSOR VOLUME TO “7” Set the sound processor volume control to
level “7” and keep it there for all subsequent
adjustments.
8. CHECK SPL LEVELS ON ALL
CHANNELS Check that the SPL levels for all of the
channels are correct (85dBC per channel). If
necessary, adjust the L, C and R, output level
trimmers on the Cat.242 B-chain card and/or
the Ls & Rs trimmers on the Cat.441 card for a
level of 85dBC from each channel.
9. SELECT “DIGITAL” FORMAT Select the sound processor to DIGITAL
format. Check that the red “DECODE-ON”
LED is illuminated on the SP23

PANASTEREO SP23 – Alignment with DOLBY CP55
17
10. REMOVE AUTOMATION
CONNECTION Disconnect the D25 automation cable from the
SP23. (This is to prevent the sound processor
from switching the SP23 back to Optical
mode)
11. SELECT “OPTICAL STEREO”
FORMAT Select the sound processor to OPTICAL
STEREO (to send pink noise to the outputs).
12. TURN OFF SP23 BYPASS Switch the SP23 out of bypass mode (Red
Bypass button OUT).
13. SELECT “SURROUND” ON THE PINK
NOISE CARD Turn on the Surround switch on the Cat.85C
Pink Noise card.
14. ADJUST SP23 INPUT LEVELS Adjust the Left Input trimmer on the SP23 so
that the two green LEDs for the left channel
are equally illuminated. Adjust the Right Input
trimmer on the SP23 so that the two green
LEDs for the right channel are equally
illuminated.
15. MUTE THE SP23 RIGHT INPUT On the SP23 press the left channel MUTE
button.
16. COARSE SET LS SPL LEVEL TO
85dBc Adjust the Left Surround Output trimmer on
the SP23 for approximately 85dBC in the
auditorium.
17. EQUALISE LEFT SURROUND
CHANNEL Remove the Left/Right Equaliser card from the
SP23 and connect it via the extender card and
cable. Adjust the left equaliser controls for a
frequency response in accordance with the
standard ISO surround channel response
curve.
18. SET LS SPL LEVEL TO 85dBC Re-adjust the Left Surround Output trimmer on
the SP23 for 85dBC in the auditorium.
19. UNMUTE THE SP23 RIGHT INPUT
AND MUTE THE LEFT INPUT. On the SP23 release the right channel MUTE
button and press the left channel MUTE
button.

PANASTEREO SP23 – Alignment with DOLBY CP55
18
20. COARSE SET RIGHT SURROUND
SPL LEVEL TO 85dBC Adjust the Right Surround Output trimmer on
the SP23 for approximately 85dBC in the
auditorium.
21. EQUALISE RIGHT SURROUND
CHANNEL Adjust the right equaliser controls for a
frequency response in accordance with the
standard ISO surround channel response
curve.
22. SET RIGHT SURROUND SPL LEVEL
TO 85dBC Re-adjust the Right Surround Output trimmer
on the SP23 for 85dBC in the auditorium.
23. UNMUTE THE LEFT CHANNEL On the SP23, release the left channel mute
button.
24. IF A TWO CHANNEL REAR
SURROUND AMPLIFIER IS
INSTALLED GOTO 31
25. COARSE SET LEFT REAR
SURROUND SPL LEVEL to 85dBC Adjust the Rear Left Surround Output trimmer
(CSL) for approximately 85dBC SPL in the
auditorium.
26. EQUALISE REAR SURROUND
CHANNEL Remove the Rear Equaliser from the SP23
and connect it via the extender card and cable.
Adjust the left equaliser controls for a
frequency response in accordance with the
standard ISO surround channel response
curve.
27. SET REAR SURROUND SPL LEVEL
TO 91dBC Replace the Rear Equaliser card and adjust
the Rear Left Surround Output trimmer (CSL)
on the SP23 for 91dBC in the auditorium.
28. RE-CONNECT AUTOMATION CABLE Re-connect the automation cable to the SP23.
29. REMOVE PINK NOISE CARD Remove the pink noise card from the
processor and replace the CAT.150 decoder
card.
30. END OF PROCEDURE The system is now ready to use.

PANASTEREO SP23 – Alignment with DOLBY CP55
19
31. ALIGNMENT OF TWO CHANNEL
REAR SURROUND AMPLIFIER
32. TURN OFF REAR RIGHT AMPLIFIER Switch off or disconnect the rear right-
surround amplifier.
33. COARSE SET REAR LEFT
SURROUND SPL LEVEL to 85dBC Adjust the Rear Left Surround Output trimmer
(CSL) for approximately 85dBC SPL in the
auditorium.
34. EQUALISE REAR LEFT SURROUND
CHANNEL Remove the Rear Equaliser from the SP23
and connect it via the extender card and cable.
Adjust the left equaliser controls for a
frequency response in accordance with the
standard ISO surround channel response
curve.
35. SET REAR LEFT SURROUND SPL
LEVEL TO 88dBC Adjust the Rear Left Surround Output trimmer
(CSL) on the SP23 for 88dBC in the
auditorium.
36. TURN OFF LEFT REAR AMPLIFIER
AND TURN ON RIGHT REAR
AMPLIFIER
Switch off or disconnect the rear left-surround
amplifier and switch on or connect the rear
right surround amplifier.
37. COARSE SET RIGHT REAR
SURROUND SPL LEVEL to 85dBC Adjust the Rear Right Surround Output
trimmer (CSR) for approximately 85dBC SPL
in the auditorium.
38. EQUALISE REAR RIGHT SURROUND
CHANNEL Adjust the right equaliser controls for a
frequency response in accordance with the
standard ISO surround channel response
curve.
39. SET REAR RIGHT SURROUND SPL
LEVEL TO 88dBC Replace the Rear Equaliser card and adjust
the Rear Right Surround Output trimmer
(CSR) on the SP23 for 88dBC in the
auditorium.
40. TURN ON REAR LEFT AMPLIFIER Switch on or re-connect the rear left surround
amplifier.
41. RE-CONNECT AUTOMATION CABLE Re-connect the automation cable to the SP23.

PANASTEREO SP23 – Alignment with DOLBY CP55
20
42. REMOVE PINK NOISE CARD Remove the pink noise card from the
processor and replace the Cat.150 decoder
card.
43. END OF PROCEDURE The system is now ready to use.