440 Foreground Audio Controller

440 Foreground Audio Controller
User’s Guide
440
440 Foreground
Audio Controller
Table of Contents
Introduction
1
Chapter 2
Operator Safety Summary
2
Chapter 3
Fast Setup
3
Chapter 4
Front Panel Overview
4
Chapter 5
Rear Panel Overview
6
Chapter 6
Applications
8
Chapter 7
Troubleshooting
10
Chapter 8
Specifications
12
Chapter 9
Block Diagram
14
Chapter 10
Warranty and Service
15
Appendix A
RC-2 Remote Controller
17
Appendix B
Modification Instructions
18
Appendix C
Declaration of Conformity
20
440
Chapter 1
Rev A.01, 8 Junw, 1999
Symetrix part number 53440-0A01
Subject to change without notice.
©1999, Symetrix, Inc. All right reserved.
Symetrix is a registered trademark of Symetrix, Inc.
Mention of third-party products is for informational
purposes only and constitutes neither an endorsement nor
a recommendation. Symetrix assumes no responsibility
with regard to the performance or use of these products.
Under copyright laws, no part of this manual may be
reproduced or transmitted in any form or by any means,
electronic or mechanical, including photocopying,
scanning, recording or by any information storage and
retrieval system, without permission, in writing, from
Symetrix, Inc.
i
14926 35th Ave. West
Lynnwood, WA 98037 USA
Tel (425) 787-3222
Fax (425) 787-3211
Email: [email protected]
Chapter 1
Introduction
Congratulations on your purchase of the Symetrix 440 Foreground Audio Controller. The 440 is
designed to provide a high degree of flexibility and control in your music/paging system. It may be
used as the signal router and controller in a new music/paging sound system installation, or it may
be used to add paging to an existing background music system.
Three stereo program inputs are provided, allowing selection between three different program
sources, such as satellite feed, CD player, and AM/FM tuner. Each program input has separate
gain control, for optimal level-matching.
The 440 provides both a mic-level page input and a line-level page input. You may use either type
of page input, or a mix of both inputs. When a page occurs, the selected program material will be
ducked (decreased) by a user-selected amount, to provide intelligibility for the page.
Bass and treble tone controls and a master volume control allow the user to tailor the overall
sound, and the stereo program material may be summed to mono at the output stage, if desired.
A separate output is provided to feed the music-on-hold input of a telephone system. This is a
direct music-only output (no paging), and the music at this output will not be ducked when a page
occurs.
The 440 offers an excellent range of routing and control options, making it the perfect choice for a
wide variety of installations. Its flexibility and simplicity can save you time and money in the
design and installation of your next project.
We recommend that you read this manual cover-to-cover. You will find the answers to most of
your questions inside. If you have technical questions beyond the scope of this manual, please
contact our Customer Service Department at:
Fax:
(425) 787-3211
Email:
[email protected]
PAGE INPUT
DUCKER
MIX
RANGE (dB)
PROGRAM INPUTS
PGM SELECT
1
440
-30
FOREGROUND
AUDIO CONTROLLER
-15
2
TONE
TRIM 1 (dB)
TRIM 2 (dB)
TRIM 3 (dB)
0
0
0
-6
+6
-6
+6
-6
TREBLE (dB)
8KHz
0
0
-6
+6
REMOTE
BASS (dB)
100Hz
3
-6
+6
+6
ACTIVE
-60
LINE
OUTPUT
MUSIC ON
HOLD
0
-12
+12
-12
+12
-12
+12
-12
+12
-12
LEVEL
STEREO
MONO
DUCK
MIC
440
Phone: (425) 787-3222
CLIP
OFF
+12
MAX
OFF
MAX
POWER
Front panel
440
FOREGROUND
AUDIO CONTROLLER
MANUFACTURED BY SYMETRIX INC., LYNNWOOD WA, USA.
THIS PRODUCT CONTAINS NO
USER SERVICEABLE PARTS.
OUTPUTS
MUSIC
ON HOLD
RIGHT
REMOTE CONTROL
LEFT
INSERT
VOLUME PROGRAM
F E D C B A
POWER INPUT
RIGHT
REMOTE
LOCAL
PROGRAM INPUTS
LEFT
RING = SEND
TTP = RETURN
SLEEVE = GND
RIGHT
LEFT
LINE
PHANTOM
ON
OFF
RIGHT
CONNECT TO SYMETRIX PS-3
OR PS-3E POWER SUPPLY ONLY.
FABRIQUÉ AUX E.-U. PAR
SYMETRIX INC., LYNNWOOD, WASHINGTON.
RÉFÉREZ TOUTE RÉPARATION À UN TECHNICIEN QUALIFIÉ.
PAGE INPUT
LEFT
BALANCED
TIP = HIGH, RING = LOW
SLEEVE = GND
RIGHT
PGM 3
PGM 2
PGM 1
MIC
Rear panel
1
Operator Safety Summary
Equipment Markings
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
TO REDUCE THE RISK OF FIRE OR
SHOCK DO NOT EXPOSE
WARNING: ELECTRIC
THIS EQUIPMENT TO RAIN OR MOISTURE
DE CHOC ELECTRIQUE
AVIS: RISQUE
NE PAS OUVRIR
SEE OWNERS MANUAL. VOIR CAHIER D’INSTRUCTIONS.
No user serviceable parts inside. Refer servicing to qualified service personnel.
Il ne se trouve a l’interieur aucune piece pourvant entre reparée l’usager.
S’adresser a un reparateur compétent.
The lightning flash with arrowhead symbol within an
equilateral triangle is intended to alert the user of the
presence of uninsulated “dangerous voltage” within
the product’s enclosure that may be of sufficient
magnitude to constitute a risk of electric shock to
persons. The exclamation point within an equilateral
triangle is intended to alert the user of the presence of
important operating and maintenance (servicing)
instructions in the literature accompanying the product
(i.e. this manual).
Caution To prevent electric shock, do not use the
Terms
polarized plug supplied with the unit with
any extension cord, receptacle, or other
outlet unless the blades can be fully
inserted.
Several notational conventions are used in this
manual. Some paragraphs may use Note, Caution,
or Warning as a heading. Certain typefaces and
capitalization are used to identify certain words.
These are:
440
Note
Caution
Warning
CAPITALS
Boldface
2
Identifies information that needs
extra emphasis. A Note generally
supplies extra information to help
you to better use the 440.
Identifies information that, if not
heeded, may cause damage to the
440 or other equipment in your
system.
Identifies information that, if
ignored, may be hazardous to your
health or that of others.
Controls, switches or other markings
on the 440’s chassis.
Strong emphasis.
Chapter 2
Important Safety Instructions
Please read and keep these instructions. Heed
and follow all warnings and instructions.
Install in accordance with the manufacturer’s
instructions.
Grounding The chassis of this product is
grounded through the grounding conductor of
the PS-3/PS-3E power cord. To avoid electric
shock, plug the power cord into a properly wired
receptacle before making any connections to the
product. A protective ground connection, by
way of the grounding conductor in the power
cord, is essential for safe operation. Do not defeat
the safety purpose of the grounding plug. The
grounding plug has two blades and a third
grounding prong. The third prong is provided for
your safety. When the provided plug does not fit
your outlet, consult an electrician for replacement
of the obsolete outlet.
Danger from Loss of Ground If the protective
ground connection is lost, all accessible conductive parts, including knobs and controls that may
appear to be insulated, can render an electric
shock.
Proper Power Cord Use only the power cord
and connector specified for the product and your
operating locale. Use only a cord that is in good
condition. Protect the power cord from being
walked on or pinched, particularly at plugs,
convenience receptacles, and the point where
they exit from the apparatus.
Operating Location Do not operate this equipment under any of the following conditions:
explosive atmospheres, in wet locations, in
inclement weather, improper or unknown AC
mains voltage, or if improperly fused. Do not
install near any heat source such as radiators, heat
registers, stoves, or other apparatus (including
amplifiers) that produce heat. Unplug this
apparatus during lightning storms or when
unused for long periods of time.
Stay Out of the Box To avoid personal injury
(or worse), do not remove the product covers or
panels. Do not operate the product without the
covers and panels properly installed. Only use
accessories specified by the manufacturer. Clean
only with a damp cloth.
User-serviceable parts There are no user
serviceable parts inside the 440. In case of failure,
refer all servicing to the factory. Servicing is
required when the 440 has been damaged in any
way, such as when a power supply cord or plug
is damaged, liquid has been spilled or objects
have fallen into the apparatus, the apparatus has
been exposed to rain or moisture, does not
operate normally, or has been dropped.
Chapter 3
Fast Setup
Fast First-Time Setup
This section provides simple instructions to begin using the 440. Please refer to later chapters for
detailed descriptions of product features and applications.
1.
Set the PAGE INPUT MIX and DUCKER RANGE controls to the 12:00 position.
2.
Use the PROGRAM SELECT control to select the desired program input.
3.
Set the PROGRAM INPUTS trimpots (TRIM 1, TRIM 2 and TRIM 3) to the 12:00 position (0).
4.
Set the TONE controls, BASS and TREBLE, to the 12:00 Position.
5.
Set the OUTPUT STEREO/MONO switch appropriately for your output configuration.
6.
Set the OUTPUT MUSIC ON HOLD trimpot to the 12:00 position.
7.
Set the OUTPUT LEVEL control completely counterclockwise.
8.
Connect the 440 to an appropriate source of AC power, using the Symetrix PS-3 or PS-3E
power supply provided with your 440.
9.
Set the REMOTE CONTROL LOCAL/REMOTE switch (located on the back panel) to the Local (out)
position.
10. Set the PAGE INPUT PHANTOM POWER switch to the Off (out) position, unless you will be
connecting to the PAGE INPUT a condenser page mic that requires external phantom power.
11. Connect your audio inputs and outputs.
12. Turn up the GAIN control until the desired volume level is reached.
440
Now read the rest of this manual.
3
Front Panel Overview
PAGE INPUT
DUCKER
MIX
RANGE (dB)
PROGRAM INPUTS
PGM SELECT
1
440
-30
FOREGROUND
AUDIO CONTROLLER
Chapter 4
-15
2
TONE
TRIM 1 (dB)
TRIM 2 (dB)
TRIM 3 (dB)
0
0
0
-6
+6
-6
+6
-6
TREBLE (dB)
8KHz
0
0
-6
+6
REMOTE
BASS (dB)
100Hz
3
-6
+6
+6
DUCK
MIC
LINE
OUTPUT
MUSIC ON
HOLD
ACTIVE
-60
0
-12
-12
+12
+12
-12
+12
-12
+12
-12
LEVEL
STEREO
MONO
CLIP
OFF
+12
MAX
OFF
MAX
POWER
Page Input Section
MIX control – Sets the ratio of mic input signal to line input signal.
When this control is set completely counterclockwise, the signal
present at the mic-level PAGE INPUT will pass, but the signal present at
the line-level PAGE INPUT will not. When this control is set completely
clockwise, the signal present at the line-level PAGE INPUT will pass, but
the signal present at the mic-level PAGE INPUT will not. When the MIX
control is set anywhere between clockwise and counter clockwise,
both signals will pass, and the balance between their levels will be
determined by the position of this control.
PAGE INPUT
MIX
MIC
LINE
Ducker Section
DUCK LED – Lights to indicate that the program material is being
ducked.
DUCKER
RANGE (dB)
RANGE control – Determines the amount of ducking that will occur.
If this control is set completely counterclockwise (-60), the program
material will be ducked by 60dB (virtually muted) when a page
occurs. If this control is set clockwise (0), then the program
material will not be ducked at all, even when a page occurs.
-30
-15
DUCK
-60
0
THRESHOLD and RELEASE TIME controls – Internal controls are
provided to change the Ducker threshold setting and release time
from the factory presets. Please see Appendix B for instructions.
Program Inputs Section
440
PGM SELECT control –
Selects which of the
three program inputs
will be present at the
output of the 440. Only
one input may be
selected at a time.
PROGRAM INPUTS
PGM SELECT
1
2
TRIM 1 (dB)
TRIM 2 (dB)
TRIM 3 (dB)
3
0
0
-6
+6
-12
+12
0
-6
+6
-12
+12
-6
+6
-12
+12
TRIM 1 control – Sets
the gain that will be
applied to the program
material which is connected to PROGRAM INPUT 1.
TRIM 2 control – Sets the gain that will be applied to the program material which is connected to
PROGRAM INPUT 2.
TRIM 3 control – Sets the gain that will be applied to the program material which is connected to
PROGRAM INPUT 3.
Tone Section
BASS control – Provides up to 12dB of boost or cut at 100 Hz to all signals, program and paging,
which pass through the 440.
4
TREBLE control – Provides up to 12dB of boost
or cut at 8000 Hz to all signals, program and
paging, which pass through the 440.
Note
TONE
The 440 may be modified to cause
the Bass and Treble Controls, as
well as the Output Level Control, to
affect only the program material, and
not the page signal. Please see
Appendix B for modification
instructions.
BASS (dB)
100Hz
TREBLE (dB)
8KHz
0
0
-6
+6
-12
+12
-6
+6
-12
+12
Remote Section
ACTIVE LED – Lights to indicate that the user has activated the remote control
mode by setting the rear panel LOCAL/REMOTE switch to the REMOTE position.
When the remote control mode is activated, the front panel PROGRAM SELECT
control is rendered inactive, and the PROGRAM SELECT functions are solely
controlled by a remote unit connected to the Remote Control terminals on the
rear panel of the 440.
REMOTE
ACTIVE
In REMOTE mode the OUTPUT LEVEL control on the 440 determines the maximum
output level obtainable. The REMOTE LEVEL control can be used to reduce the
output level from this maximum setting.
Output Section
STEREO/MONO switch – Selects whether the output of the 440 will be stereo or mono. If “STEREO” is
selected, the stereo program material will be preserved, with the mono paging signal appearing
equally on the left and right outputs. If “MONO” is selected, the stereo program material will be
summed to mono and combined with the mono paging signal.
MUSIC ON HOLD control – Sets the
volume level of program material
present at the 440’s Music on Hold
Output.
OUTPUT
MUSIC ON
HOLD
LEVEL
LEVEL – Sets the overall gain (volume) of the combined program material/paging signal which
appears at the 440’s LEFT AND RIGHT OUTPUTS, when the LOCAL/REMOTE switch on the rear of the 440
is set to the “Local” position.
When the LOCAL/REMOTE switch on the rear of the 440 is set to the “Remote” position, the LEVEL
control sets a master gain limit, above which the output gain will not be allowed to rise. In other
words, when the 440 is in “Remote” mode, the remote control’s output level adjustment may be
used to increase the 440’s output level up to, but not exceeding, the level determined by the setting
of the front-panel LEVEL control.
Note
The Symetrix 440 may be modified so that the LEVEL control only affects program material,
and not the paging signal. See Appendix B for modification instructions.
POWER LED – Lights to indicate that the 440 is receiving power.
5
440
STEREO
MONO
CLIP LED – Lights to warn that the
output signal is too high, and
CLIP
OFF MAX
distortion may occur. It is acceptOFF
MAX
able for this LED to flash occasionPOWER
ally, on peaks in the program material
or paging signal, but this LED
should never stay lit. If this LED stays on, turn the OUTPUT LEVEL control towards the counterclockwise position until the CLIP LED only flashes occasionally, or not at all.
Rear Panel Overview
440
FOREGROUND
AUDIO CONTROLLER
MANUFACTURED BY SYMETRIX INC., LYNNWOOD WA, USA.
THIS PRODUCT CONTAINS NO
USER SERVICEABLE PARTS.
OUTPUTS
MUSIC
ON HOLD
RIGHT
Chapter 5
REMOTE CONTROL
LEFT
INSERT
VOLUME PROGRAM
F E D C B A
POWER INPUT
RIGHT
REMOTE
LOCAL
PROGRAM INPUTS
LEFT
RING = SEND
TTP = RETURN
SLEEVE = GND
RIGHT
PAGE INPUT
LEFT
LEFT
PHANTOM
ON
OFF
RIGHT
CONNECT TO SYMETRIX PS-3
OR PS-3E POWER SUPPLY ONLY.
FABRIQUÉ AUX E.-U. PAR
SYMETRIX INC., LYNNWOOD, WASHINGTON.
RÉFÉREZ TOUTE RÉPARATION À UN TECHNICIEN QUALIFIÉ.
LINE
BALANCED
TIP = HIGH, RING = LOW
SLEEVE = GND
RIGHT
PGM 3
PGM 2
PGM 1
MIC
Power Input
POWER INPUT – This is a 7-pin DIN power receptacle. Connect only the
Symetrix PS-3 (117V power supply) or Symetrix PS-3E (230V power supply) to
the Power Input receptacle. Connect the AC power connector of the PS-3 or
PS-3E to an AC power source that is of the correct voltage and frequency, as
marked on the PS-3 or PS-3E.
Outputs
GROUND
CONTROLLER
RIX INC., LYNNWOOD WA, USA.
O
PS-3
Y ONLY.
WASHINGTON.
ON À UN TECHNICIEN QUALIFIÉ.
MUSIC ON HOLD OUTPUT – This RCA jack
OUTPUTS
provides a direct, line-level, mono output
of only the program material currently
.
MUSIC
RIGHT
LEFT
selected. The level of this output is
ON HOLD
determined by the MUSIC ON HOLD LEVEL
control. No paging signal is present at
this output, and the program material at
this output is not ducked when a page
RIGHT
.
occurs. This output is designed to feed
the “music on hold” input of a telephone
system. The MUSIC ON HOLD OUTPUT is transformer-isolated to prevent ground loop noise.
440
LEFT OUTPUT – If the STEREO/MONO switch on the front panel is in the STEREO position (in), this final
output of the 440 will include paging signal and the left channel of the selected program material, as
modified by all of the 440’s front panel controls and/or remote control. If the STEREO/MONO switch on
the front panel is in the MONO position (out), this final output of the 440 will include paging signal and
both channels of the selected program material, as modified by all of the 440’s front panel controls and/
or remote control. This line-level output is available at the LEFT OUTPUT Euroblock terminal connector
(balanced) and at the LEFT OUTPUT RCA connector (unbalanced).
RIGHT OUTPUT – If the STEREO/MONO switch on the front panel is in the Stereo position (in), this final
output of the 440 will include paging signal and the right channel of the selected program material, as
modified by all of the 440’s front panel controls and/or remote control. If the STEREO/MONO switch on
the front panel is in the MONO position (out), this final output of the 440 will include paging signal and
both channels of the selected program material, as modified by all of the 440’s front panel controls and/
or remote control. This line-level output is available at the RIGHT OUTPUT Euroblock terminal connector
(balanced) and at the RIGHT OUTPUT RCA connector (unbalanced).
Remote Control
REMOTE CONTROL VOLUME – When connected to the
Symetrix RC-2 remote controller, this Euroblock
terminal connector allows remote control of the 440’s
output gain. The REMOTE/LOCAL switch must also be in
the REMOTE (in) position to enable remote volume
control. If the switch is set to REMOTE but there is no
remote control connected, the 440 will produce no
signal at any of its outputs.
6
REMOTE CONTROL
VOLUME PROGRAM
F E D C B A
REMOTE
LOCAL
Note
See Appendix A for more information on the Symetrix RC-2 remote controller.
REMOTE CONTROL PROGRAM - When connected to the Symetrix RC-2 remote controller, this
Euroblock terminal connector allows remote selection of the active PROGRAM INPUT, overriding the
front panel PGM SELECT control. The LOCAL/REMOTE switch must also be in the REMOTE (in)
position to enable remote program selection.
Sidechain Inserts
LEFT INSERT – This ¼" TRS jack (Tip = Return, Ring = Send, Sleeve =
Ground) allows line-level outboard processing of the signal which
will appear at the left program output (page signal mixed with the left
channel of the selected program material).
INSERT
RIGHT
LEFT
RING = SEND
TTP = RETURN
SLEEVE = GND
RIGHT INSERT – This ¼" TRS jack (Tip = Return, Ring = Send,
Sleeve = Ground) allows line-level outboard processing of the
signal which will appear at the right program output (page signal
mixed with the right channel of the selected program material).
Note
If you wish to process just the selected program material
(before it is mixed with the page signal), please see Appendix B for modification
instructions.
Program Inputs
PROGRAM INPUTS 1 (Left & Right) – RCA
unbalanced left and right input jacks for
program material. These line-level inputs
will be active when the PGM SELECT
control is in the “1” position. Gain of this
input pair is controlled by the TRIM 1
front-panel control.
PROGRAM INPUTS
RIGHT
LEFT
LEFT
BALANCED
TIP = HIGH, RING = LOW
SLEEVE = GND
RIGHT
440
PROGRAM INPUTS 2 (Left & Right) – RCA
PGM 3
PGM 2
PGM 1
unbalanced left and right input jacks
for program material. These line-level
inputs will be active when the PGM SELECT control is in the “2” position. Gain of this input pair is
controlled by the TRIM 2 front-panel control.
PROGRAM INPUTS 3 (Left & Right) – Balanced TRS ¼" left and right input jacks for program material.
These line-level inputs will be active when the PGM SELECT control is in the “3” position. Gain of
this input pair is controlled by the TRIM 3 front-panel control.
Page Inputs
LINE PAGE INPUT – This balanced Euroblock terminal
input connector accepts line-level paging signals.
MIC PAGE INPUT – This balanced XLR input jack
accepts mic-level paging signals. If you need
phantom power for a condenser microphone
connected to this input, set the PHANTOM switch to
the “in” (on) position.
PAGE INPUT
LINE
PHANTOM
ON
OFF
MIC
PHANTOM SWITCH – This on/off switch allows +15 V
phantom power to be applied to pins 2 and 3 of
the MIC PAGE INPUT XLR connector. If you need phantom power for a condenser microphone
directly connected to this input, set the PHANTOM switch to the “in” (on) position. If you do not
require phantom power at this input, set the PHANTOM switch to the “out” (off) position.
7
Applications
Chapter 6
Please refer to Figure 6-1 on the next page for an illustration of the appropriate connections.
Foreground Music with Paging
This type of paging system is typically used in a restaurant or shopping mall. It is desirable for the
paging to be clearly heard, but the transition between paging and music should not be too obtrusive. We recommend that you duck the background music by 10 – 20dB.
Foreground Music/Paging with Emergency Override
If you have a foreground music/paging system that you wish to override in the case of an emergency, you will want the ducking action to be thorough. Connect the emergency paging source to
the PAGE INPUT of the 440. Use the MIC PAGE INPUT if your emergency paging source is mic-level,
and use the LINE PAGE INPUT if the emergency paging source is line-level.
Because this is an emergency-paging situation, use the PAGE INPUTS only for emergency page
sources. Set the RANGE control completely counterclockwise for maximum ducking. Connect your
foreground music/paging source to one of the PROGRAM INPUTS of the 440. Set the PGM SELECT
control to activate the desired PROGRAM INPUT.
Using Multiple Program Sources
The 440 provides program inputs for up to three stereo program sources, such as satellite feed,
cassette tape deck, CD player, radio, etc. PROGRAM INPUTS 1 and 2 use unbalanced RCA connectors
for left and right channels. PROGRAM INPUT 3 uses balanced ¼" TRS connectors for left and right
channels. The setting of the PGM Select control determines which program source will be active,
and only one program source may be used at any given time.
440
Connect your program sources to the PROGRAM INPUTS of the 440, then adjust the front-panel
PROGRAM INPUT trimpots to match program levels. For example, if you are connecting the outputs of
a CD player to PROGRAM INPUT 1, and the outputs of a cassette deck to PROGRAM INPUT 2, the
trimpot for PROGRAM INPUT 1 would probably be set for a lower volume level than the trimpot for
PROGRAM INPUT 2. This is because the output levels of CD players tend to be higher than the
output levels of cassette decks.
Providing Background Music for a Telephone System
When a PROGRAM INPUT is activated by the PGM SELECT control, its signal is split and routed to two
destinations. The first destination is the ducker circuitry. The second destination is the MUSIC ON
HOLD output. The signal present at the MUSIC ON HOLD output is active program material only (no
paging), and because this signal was split off before reaching the ducker circuitry, it will not be
ducked when paging occurs. The MUSIC ON HOLD output of the 440 is designed to be a music-only
output, which may be connected to the music-on-hold input of a telephone system. Active
program material used by the music/paging system will also be the music-on-hold signal used by
the telephone system. To prevent the possibility of ground loop noise, this output is transformerisolated.
8
9
FOREGROUND
AUDIO CONTROLLER
MIC
SOUND
SYSTEM
0
-15
LEFT
OUTPUTS
RIGHT
-60
-30
2
3
RIGHT
1
PGM SELECT
-6
-12
0
+12
REMOTE CONTROL
+12
+6
F E D C B A
VOLUME PROGRAM
-12
0
+6
REMOTE
LOCAL
-6
-12
+12
INSERT
-6
-12
LEFT
RING = SEND
TTP = RETURN
SLEEVE = GND
RIGHT
+6
0
+12
BASS (dB)
100Hz
+6
-6
+12
+6
LEFT
Figure 6-1.
PGM 1
STEREO
MONO
PROGRAM SOURCE 1
SIGNALS THAT WILL BE DUCKED
PGM 3
RIGHT
LEFT
ACTIVE
REMOTE
PGM 2
PROGRAM INPUTS
-12
0
TREBLE (dB)
8KHz
BALANCED
TIP = HIGH, RING = LOW
SLEEVE = GND
RIGHT
TONE
PROGRAM SOURCE 2
0
TRIM 3 (dB)
PROGRAM SOURCE 3
-6
TRIM 2 (dB)
PROGRAM INPUTS
TRIM 1 (dB)
440
TO TELEPHONE
MUSIC ON HOLD
SYSTEM
FABRIQUÉ AUX E.-U. PAR
SYMETRIX INC., LYNNWOOD, WASHINGTON.
RÉFÉREZ TOUTE RÉPARATION À UN TECHNICIEN QUALIFIÉ.
CONNECT TO SYMETRIX PS-3
OR PS-3E POWER SUPPLY ONLY.
POWER INPUT
MUSIC
ON HOLD
LINE
DUCK
MIX
MANUFACTURED BY SYMETRIX INC., LYNNWOOD WA, USA.
THIS PRODUCT CONTAINS NO
USER SERVICEABLE PARTS.
440
FOREGROUND
AUDIO CONTROLLER
440
DUCKER
RANGE (dB)
PAGE INPUT
CHOOSE THE EMERGENCY PAGE
SOURCE HERE
CHOOSE PROGRAM THAT WILL BE DUCKED HERE
OUTPUT
LINE
OFF
CLIP
MIC
PAGE INPUT
MAX
MUSIC ON
HOLD
POWER
ON
OFF
PHANTOM
MAX
EMERGENCY
PAGE MICROPHONE
OFF
LEVEL
Troubleshooting
Chapter 7
The power LED does not light:
Are you using the correct Symetrix power supply for your location? For areas with 117V AC
power, the Symetrix PS-3 is correct. For locales with 230V AC power, the Symetrix PS-3E is the
correct power supply.
Check the power supply connections at the 440 and at the AC power source.
Is the AC power source actually providing power?
If, after checking all of the above, the 440 is not powering up correctly, consult a qualified service
technician or the Symetrix factory.
There is no output signal:
Is the power LED on? If not, see above.
Is the Output Level control turned up? If you are using the remote controller, is the Output Level
control on the remote controller turned up?
Check position of the Remote/Local switch on the 440’s rear panel. If the switch is set to Remote
but there is no remote control connected, the 440 will produce no signal at any of its outputs.
Check input, output and remote controller cables and connections.
Determine that there really is signal coming from the paging source and the program material
source, and that these signals are reaching the 440.
Is your paging source connected to the correct input? If your paging source is a mic, it should be
connected to the Mic Page Input, not the Line Page Input.
If you are connecting a condenser paging mic that does not have its own power supply to the Page
Input of the 440, is the Phantom switch set to the “in” position?
Try setting the Mix control to the 12 o’clock position.
Is the PGM Select control set to the correct position for the desired program source? If you are
using the remote controller, is the correct program source selected?
Is the Trim control for the desired program source turned up?
440
Distortion in the output signal:
Is the Clip LED on? If it is, turn the Output Gain down.
Check your signal sources to make sure that the incoming signals are not already distorted before
they reach the 440.
Check your input signals. Are they overdriving any of the 440’s inputs? If so, reduce the incoming signal level.
Is the distortion occurring in both the paging signal and in the program material signal?
If the distortion is occurring only in the paging signal, check your paging source. If your paging
source is line-level, make sure that you connected it to the 440’s Line Page Input, not the Mic Page
Input.
If the distortion is occurring only in the program material signal, then you may be feeding the 440 a
program signal that is too hot.
Are you using the correct Symetrix power supply for your locale (PS-3 for 117V AC power, PS-3E
for 230V AC power)?
10
No ducking is occurring:
Is the Range control turned clockwise (0)? Try turning this control counterclockwise.
Is page signal reaching the 440? Do you hear the page?
Did you use the Music On Hold output by mistake?
The 440 is not responding to the front-panel PGM Select and Output Level Controls:
Is the Remote Active LED on? It should not be, if you wish to these front panel controls.
Check the setting of the Remote/Local switch on the 440’s rear panel. For the front-panel PGM
Select and Output Level controls to be enabled, the switch should be in the “Local” position.
The 440 is not responding to the Remote Controller:
Is the Remote Active LED on? It should be, if you wish to use the remote controller.
Check the setting of the Remote/Local switch on the 440’s rear panel. For the remote controller to
be enabled, the switch should be in the “Remote” position.
Is the remote controller correctly connected to the 440?
Buzz in the output:
Check input and output connector wiring.
Check for ground loops between interconnected system equipment.
Are all system components on the same AC ground?
Noise (hiss):
Check input signal levels. The input may be too low in level. If so, boost the incoming signal.
440
If the incoming page signal to the 440 is Mic level, make sure that the page source is connected to
the Mic Page Input, not the Line Page Input.
Are one or both of the input signals already noisy? Listen “up stream” from the 440 to determine
that you are feeding it clean signals.
The 440 doesn’t respond properly:
Consult a qualified service technician or the Symetrix factory.
11
Specifications
Chapter 8
Architects and Engineers Specifications
The foreground audio controller shall provide page-over-music capability and shall allow the user
to select between three music inputs. The unit shall occupy a single rack space (1U).
The 440 shall provide separate mic-level and line-level page inputs. The mic-level page input shall
be balanced and low-impedance, and shall use one XLR connector. The mic-level page input shall
also have a rear-panel pushbutton which shall apply +15V phantom power to the mic-level page
input. The line-level page input shall be balanced and high-impedance, and shall use one Euroblock
detachable terminal connector. A front-panel mix control shall be continuously adjustable from
mic-level page input signal only, to a mix of mic-level and line-level page input signals, to line-level
page input signal only.
Three stereo line-level program inputs shall be provided. Program inputs 1 and 2 shall use unbalanced left and right RCA input connectors. Program input 3 shall use balanced left and right ¼”
tip-ring-sleeve connectors. Each program input shall be individually buffered, and shall have an
associated front-panel trimpot, which provides a continuous adjustment range from +12dB signal
boost to -12dB signal cut. Any one of the three program inputs may be selected by a front-panel
program select control.
Remote control shall be available for control of program selection and output level. Remote control
shall be enabled/disabled by a rear-panel pushbutton switch. When remote control is enabled, a
front-panel indicator LED shall light, the front-panel program select control shall be disabled, and
the front-panel output level control shall become a master gain limit control.
Bass and treble tone controls shall be provided. These controls shall act on the combined page
signal and selected program signal or optionally only on the program signal. The bass tone control
shall have a center frequency of 100 Hz, and shall have a continuous adjustment range of -12dB to
+12dB. The treble control shall have a center frequency of 8kHz, and shall have a continuous
adjustment range of -12dB to +12dB.
Rear-panel ¼-inch, tip-ring-sleeve left and right insert jacks shall be provided to allow external
processing of the combined paging and selected program signals, or optionally on the program
signal only.
440
The unit shall incorporate a priority ducking system. When audio is present at either page input,
the selected program signal shall be attenuated (ducked). There shall be a duck LED to indicate
that ducking is occurring. A continuously adjustable range control shall set the amount of
attenuation from -60dB to 0dB.
The stereo main outputs of the unit shall be available at left and right unbalanced RCA connectors,
and also at balanced left and right Euroblock detachable terminal connectors. A front-panel switch
shall allow stereo or mono main output capability. A front-panel gain control with a clip LED shall
simultaneously and continuously adjust the level of the left and right main outputs.
A music-on-hold output, available at a single unbalanced RCA connector, shall also be provided.
The music-on-hold output shall provide a mono sum of the selected program input, prior to any
processing. A front-panel trimpot shall provide gain control for this signal.
The foreground audio controller shall be a Symetrix., Inc. model 440 Foreground Audio Controller.
12
Specifications
Program Inputs
Gain
Maximum Input Level
Program Input Impedance
Frequency Response, MOH output
0dB +/- 12dB
+20dBu, 0dB gain
20k Ohms Balanced,
20k Ohms Unbalanced
>40dB, Input 3 only
CMMR
Paging Inputs
Microphone Input Gain
Line Input Gain
Microphone Input Impedance
Line Input Impedance
Mic Input Max Input Level
Line Input Max Input Level
CMMR
Phantom Power (Mic input only)
Ducker Sidechain
Threshold
Factory preset at equivalent of -20dBu
at page preamp output
Fixed at 1 second
Factory Preset at 1/2 second
10mS – 16mS program dependent
-60dB to 0dB
Hold Delay
Release Time
Attack Time
Range
Insert Patching
Signal Level
Output Impedance
Input Impedance
Maximum I/O Level
0dBu nominal
200 Ohms
20k Ohms
+20dBu
Tone Controls
Bass
Treble
Connections
Mic Page Input
Line Page Input
Program Inputs 1 and 2
Program Inputs Left, Right, 3
Left and Right Inserts
Remote Control
Left and Right Outputs
Music on Hold Output
Power In
Physical
Size (hwd)
Shipping Weight
Electrical
Power Requirements
XLR
Euroblock
RCA jacks
1/4" TRS
1/4" TRS
Euroblock
Euroblock
RCA jack
7 pin DIN
1U rack unit
1.72" x 19" x 6"
8 lbs
115V nominal, 60 Hz, 15 watts maximum
230V nominal, 50 – 60Hz, 15 watts maximum
+/-12dB maximum at 100Hz
+/-12dB maximum at 8kHz
Outputs
Maximum Output, Unbalanced
Maximum Output, Balanced
Output Impedance
+20dBu into 10k Ohm load
+20dBm into 600 Ohm load
200 Ohms Unbalanced,
400 Ohms Balanced
20Hz – 20kHz, +/-1dB with tone controls
centered (any input to any output)
In the interest of continuous product improvement, Symetrix, Inc. reserves the right to alter, change, or modify these specifications without prior
notice.
©1999, Symetrix, Inc. All rights reserved.
13
440
Performance Data
Frequency Response
40dB
unity gain (0dB)
>1500 Ohms
20k Ohms
-20dBu
+20dBu
>40dB
+15VDC switchable
100Hz to 15kHz, +/-1dB
(at 0dBm into 600 Ohm load)
Channel Balance
1dB maximum offset with controls at unity
(typical < 0.5dB)
1.5dB maximum offset with controls in any position
(typical < 0.75dB)
Noise Floor with Page Level CCW
-89dBu typical (20kHz NBW)
Page Mic Preamp EIN
-125dBu typical (20kHz NBW)
THD+Noise
<0.08 at +4dBu output level
(any input to any output, all controls at unity gain)
+V
TRIM 1
TRIM 2
TRIM 3
REMOTE
ACTIVE
REMOTE
LOCAL
PHANTOM
INPUT
SELECT
CIRCUIT
DUCK
RANGE
RELEASE
THRESHOLD
PAGE
INPUT
MIX
VCA
VCA
MIX
CONTROL
VOLTAGE
CIRCUITRY
OUTPUT
LEVEL
(LOCAL)
MIX
MIX
INSERT (LEFT)
MONO
INSERT (RIGHT)
POST INSERT
PRE-INSERT
POST TONE
F E D
PAGE SIGNAL
MIX POINT JUMPER
REMOTE
VOLUME
+V
VCA
VCA
BASS
TREBLE
MUSIC ON HOLD
OUTPUT LEVEL
REMOTE
LOCAL
TONE
CONTROLS
MIX
MIX
CLIP
MUSIC ON HOLD
BALANCED
OUTPUT
LEFT
BALANCED
MIX OUT
LEFT
UNBALANCED
MIX OUT
RIGHT
BALANCED
MIX OUT
RIGHT
UNBALANCED
MIX OUT
440
LEFT
UNBALANCED
PROGRAM 1 IN
RIGHT
UNBALANCED
PROGRAM 1 IN
LEFT
UNBALANCED
PROGRAM 2 IN
RIGHT
UNBALANCED
PROGRAM 2 IN
LEFT
BALANCED
PROGRAM 3 IN
C B A
RIGHT
BALANCED
PROGRAM 3 IN
REMOTE
PROGRAM
SELECT
LOCAL
PROGRAM
SELECT
PAGE
MIC
INPUT
PAGE
LINE
INPUT
14
Chapter 9
Block Diagram
Chapter 10
Warranty & Service
440 Limited Warranty
Symetrix, Inc. expressly warrants that the product will be free from defects in material and workmanship for one (1) year. Symetrix's obligations under this warranty will be limited to repairing or
replacing, at Symetrix's option, the part or parts of the product which prove defective in
material or workmanship within one (1) year from date of purchase, provided that the Buyer
gives Symetrix prompt notice of any defect or failure and satisfactory proof thereof. Products
may be returned by Buyer only after a Return Authorization number (RA) has been obtained
from Symetrix. Buyer will prepay all freight charges to return the product to the Symetrix
factory. Symetrix reserves the right to inspect any products which may be the subject of any
warranty claim before repair or replacement is carried out. Symetrix may, at its option, require
proof of the original date of purchase (dated copy of original retail dealer's invoice). Final
determination of warranty coverage lies solely with Symetrix. Products repaired under warranty
will be returned freight prepaid by Symetrix via United Parcel Service (surface), to any location
within the Continental United States. At Buyer's request the shipment may be returned via
airfreight at Buyer's expense. Outside the Continental United States, products will be returned
freight collect.
The foregoing warranties are in lieu of all other warranties, whether oral, written, express,
implied or statutory. Symetrix, Inc. expressly disclaims any IMPLIED warranties, including
fitness for a particular purpose or merchantability. Symetrix's warranty obligation and
buyer's remedies hereunder are SOLELY and exclusively as stated herein.
This Symetrix product is designed and manufactured for use in professional and studio audio
systems and is not intended for other usage. With respect to products purchased by consumers for personal, family, or household use, Symetrix expressly disclaims all implied warranties, including but not limited to warranties of merchantability and fitness for a particular
purpose.
This limited warranty, with all terms, conditions and disclaimers set forth herein, shall extend
to the original purchaser and anyone who purchases the product within the specified warranty
period.
Symetrix does not authorize any third party, including any dealer or sales representative, to
assume any liability or make any additional warranties or representation regarding this product
information on behalf of Symetrix.
This limited warranty gives the buyer certain rights. You may have additional rights provided
by applicable law.
Limitation of Liability
The total liability of Symetrix on any claim, whether in contract, tort (including negligence) or
otherwise arising out of, connected with, or resulting from the manufacture, sale, delivery,
resale, repair, replacement or use of any product will not exceed the price allocable to the
product or any part thereof which gives rise to the claim. In no event will Symetrix be liable for
any incidental or consequential damages including but not limited to damage for loss of
revenue, cost of capital, claims of customers for service interruptions or failure to supply, and
costs and expenses incurred in connection with labor, overhead, transportation, installation or
removal of products or substitute facilities or supply houses.
15
440
Warranty Registration must be completed and mailed to Symetrix within thirty (30) days of the
date of purchase.
Servicing the 440
If you have determined that your 440 requires repair services and you live outside of the
United States, please contact your local Symetrix dealer or distributor for instructions on how
to obtain service. If you reside in the U.S. then proceed as follows:
Before sending anything to Symetrix, contact our Customer Service Department for a return
authorization (RA) number. The telephone number is (425) 787-3222, Monday through Friday,
8AM (0800 hours) though 4:30 PM (1630 hours) Pacific Time.
At the Symetrix factory, Symetrix will perform in-warranty or out-of-warranty service on any
product it has manufactured for a period of five years from date of manufacture.
In-warranty Repairs
To get your 440 repaired under the terms of the warranty:
1.
Call us for an RA number.
2.
Pack the unit in its original packaging materials.
3.
Include your name, address, daytime telephone number, and a brief
statement of the problem.
4.
Write the RA number on the outside of the box.
5.
Ship the unit to Symetrix, freight prepaid.
We do not accept freight collect shipments.
Repairs made in-warranty will cost you only one-way freight charges. We’ll prepay the return
(surface) freight.
440
If you send us your product in substandard packaging, we will charge you for factory shipping materials. If you don’t have the factory packaging materials, please use an oversized
carton, wrap the unit in a plastic bag, and surround it with bubble-wrap. Pack the box full of
Styrofoam peanuts. Be sure there is enough clearance in the carton to protect the rack ears
(you wouldn’t believe how many units are returned with bent ears). We will return the unit in
Symetrix packaging. Of course, if the repair is due to operator error, parts and labor will be
charged. In any event, if there are charges for the repair costs, you will pay for the return
freight. All charges will be COD unless you have made other arrangements (prepaid, Visa or
Mastercard).
Out-of-warranty Repairs
If the warranty period has passed, you’ll be billed for all necessary parts, labor, packaging
materials, and freight charges. Please remember, you must call for an RA number before
sending the unit to Symetrix.
16
Appendix A
RC-2 Remote Controller
The Symetrix 440 Foreground Audio Controller is designed for use with the Symetrix RC-2 Remote
Controller in situations that require remote control. The RC-2 provides remote PGM SELECT control
and remote OUTPUT LEVEL control.
Note
The Symetrix 440’s rear-panel REMOTE/LOCAL switch must be set to the “Remote” (in)
position to enable remote control of the 440.
RC-2 Controls
PGM SELECT control – Selects which of the three program inputs will be present at the output of the
440. Only one input may be selected at a time.
OUTPUT LEVEL control - Sets the overall gain (volume) of the combined program material/paging
signal which appears at the 440’s LEFT and RIGHT OUTPUTS, when the REMOTE/LOCAL switch on the
rear of the 440 is set to the “Remote” position. Optionally, the 440 may be modified so that the
OUTPUT LEVEL control sets the overall gain of the program material only (not the paging signal).
Please see Appendix B for modification instructions.
Note
When the REMOTE/LOCAL switch on the rear of the 440 is set to the “Remote” position, the
440’s front-panel LEVEL control sets a master gain limit, above which the output gain will
not be allowed to rise. In other words, when the 440 is in “Remote” mode, the RC-2 remote
control’s output level adjustment may be used to increase the 440’s output level up to, but
not exceeding, the level determined by the setting of the 440’s front-panel OUTPUT LEVEL
control. This switch setting disables the front-panel PGM SELECT control.
RC-2 Connectors
REMOTE CONTROL VOLUME and PROGRAM – When connected to the Symetrix 440, these Euroblock
terminal connectors allow remote control of the 440’s output gain, and selection of the active
PROGRAM INPUT. The 440’s rear-panel REMOTE/LOCAL switch must be in the REMOTE (in) position to
enable remote control.
When installing the RC-2 remote control, be sure that you connect the RC-2’s VOLUME connector to
the 440’s VOLUME terminals, and that you connect the RC-2’s PROGRAM connector to the 440’s
PROGRAM terminals. When connecting to the 440, be sure to connect with the correct polarity, so
that the “A” pin of the RC-2’s REMOTE CONTROL connector matches up with the “A” pin of the 440’s
REMOTE CONTROL Euroblock terminal connector, etc. Set the LOCAL/REMOTE switch to the “REMOTE”
(in) position, and keep your cable runs under 200 feet. Use a standard single-gang Decora plate for
ground fault circuit interrupters (#80401).
Note
Decora plate not supplied
with Symetrix RC-2 or 440.
REMOTE CONTROL
VOLUME PROGRAM
F E D C B A
SET REMOTE/
LOCAL SWITCH
TO THE REMOTE(IN)
POSITION.
J1
S1
2
3
SYMETRIX
02 RC-21100
SCHEMATIC REV 1
1
A
B
MAX
R1
OFF
PGM SELECT
Note
Symetrix recommends using
a six-conductor cable, 22 AWG or
better. Examples of suitable cable
types include Belden 9745
(stranded), Belden 8742 or 9576
(solid), and Belden 82742 (Plenum
rated).
C
D
E
F
R2
VOLUME
REMOTE
LOCAL
CONNECT LIKE-LABELED TERMINALS
ON RC-2 AND REMOTE CONTROL
CONNECTOR ON REAR OF 440.
Caution When installing the RC-2,
always follow applicable building
codes.
Figure A-1. RC-2 Front panel and connections.
17
440
Installing the RC-2
Modification Instructions
Appendix B
Caution
These servicing instructions are for use by qualified personnel only. To avoid
electric shock do not perform any servicing other than that contained in the
operating instructions portion of this manual unless you are qualified to do so.
Refer all servicing to qualified service personnel.
Warning
Lethal voltages are present inside the chassis. Perform all service work with
the unit disconnected from all AC power.
Changing the Insert Point Signal to Program Material Only
The 440 ships from Symetrix configured so that the page signal and selected program material
combine before the insert point. This means that the signal present at the LEFT and RIGHT INSERT
jacks is a combination of page signal and program material. If you wish to have only the selected
program material present at the LEFT and RIGHT INSERT jacks, then the 440 must be modified so that
the page signal and selected program material do not combine until after the insert point. To
perform this modification, please follow the following instructions.
1.
Disconnect power from the 440.
2.
Remove the top cover.
3.
Locate the PAGE MIX jumper terminals on the circuit board. These are labeled
“PRE-INSERT”, “POST-INSERT” and “POST-TONE”. (See next page for circuit board
illustration.)
4.
The 440 is shipped from the factory with a jumper in the Pre-insert position. Remove this
jumper by grasping its sides and pulling straight up (needle-nosed pliers may be helpful).
5.
Move this jumper over to the Post-insert position, and press the jumper straight down,
so that it connects the two Post-insert terminal pins.
6.
Replace the top cover.
7.
Reinstall the 440 and connect the input and output connectors.
To Make the Tone and Output Level Controls Act Only on the Program Material
440
The 440 ships from Symetrix configured so that the page signal and selected program material combine
before reaching the TONE and OUTPUT LEVEL controls. This means that the TONE and OUTPUT LEVEL
controls act on the combination of page signal and program material. If you wish to have the Tone and
OUTPUT LEVEL controls affect only the selected program material, then the 440 must be modified so that
only the selected program material passes through the tone control and output level circuitry. The page
signal and selected program material are combined after the program material has passed through these
stages. To perform this modification, please follow the following instructions.
1.
Disconnect power from the 440.
2.
Remove the top cover.
3.
Locate the PAGE MIX jumper terminals on the circuit board. These are labeled
“PRE-INSERT”, “POST-INSERT” and “POST-TONE”. (See next page for circuit board
illustration.)
4.
The 440 is shipped from the factory with a jumper in the Pre-insert position. Remove this
jumper by grasping its sides and pulling straight up (needle-nosed pliers may be helpful).
5.
Move this jumper over to the Post-tone position, and press the jumper straight down,
so that it connects the two Post-tone terminal pins.
6.
Replace the top cover.
7.
Reinstall the 440 and connect the input and output connectors.
18
C105
C105
Figure B-1. Pre-insert position.
C101
R181
R186
R187
R187
R182
U20
R155
R156
Figure B-2. Post-insert position.
R184
R180
R171
R176
PAGE MIX
C104
C107
R185
R185
C112
R183
R181
R186
R168
R184
R180
R171
R182
R167
C95
U20
R155
R156
C107
J10
C94
PAGE MIX
C104
R175
C97
C112
R183
R187
R183
U20
R165
R166
R176
C95
R162
R163
R164
PRE-INSERT
POST-INSERT
POST-TONE
C101
R176
C104
R168
R180
R171
R181
R186
R167
PAGE MIX
R155
R156
J10
C94
U17
C100
U18
PRE-INSERT
POST-INSERT
POST-TONE
C101
C95
R175
C97
R182
R167
R165
R166
C112
PRE-INSERT
POST-INSERT
POST-TONE
C97
C99
R162
R163
R164
C100
U18
J10
C94
U17
R185
R165
R166
R175
R168
R162
R163
R164
C100
U18
C105
C99
R184
C99
U17
C107
Figure B-3. Post-tone position.
Changing the Ducker Threshold and Release Time Settings
The 440 ships from Symetrix with factory-adjusted THRESHOLD and RELEASE TIME settings which
should be adequate for most applications. If you wish to change either of the settings, please
follow these instructions:
2.
Remove the top cover.
3.
Locate the trimpots labeled “THRESH” and “RELEASE” on the circuit board.
4.
The range of the THRESHOLD control is –40 to 0dBu. It is factory set to activate ducking
when a paging signal of –20dBu is detected at the page preamp output. Rotating this
control clockwise will increase the threshold setting (and vice-versa).
5.
The range of the RELEASE control is ½ second to 4 seconds. It is factory set to release at ½
second. Rotating this control clockwise will increase the release time (and vice-versa).
6.
Replace the top cover.
7.
Reinstall the 440 and connect the input and output connectors.
R35
C25
R36
R37
R51
C34
R53
U5
R43
R54
R55
D2 Q4 Q5
R26
R39
Figure B-4. Threshold trimpot.
R50
R58
D3
C18
R20
D10
R27
C20
R28
D12
RELEASE
C35
R29
C26
R38
R23
Q6
R73
R52
D9
R72
R30
L5
D5
C24
C32
THRESH
R63
R44
C29
R60
C22
R34
D11
C33
R33
R49
R19 R22
D8
R32
R56
R59
U4
R40
R21
R18
C31
R48
440
Disconnect power from the 440.
C23
1.
Figure B-5. Release trimpot.
19
Declaration of Conformity
Appendix C
Declaration of Conformity
We, Symetrix Incorporated,
14926 35th Ave. West, Lynnwood, Washington, USA,
declare under our sole responsibility that the product:
440 Foreground Audio Controller
to which this declaration relates,
is in conformity with the following standards:
EN 60065
Safety requirements for mains operated electronic and related
apparatus for household and similar general use.
EN 55103-1
Electromagnetic compatibility - Generic emission standard
Part 1: Residential, commercial, and light industry.
EN 55103-2
Electromagnetic compatibility - Generic immunity standard
Part 1: Residential, commercial, and light industry.
440
The technical construction file is maintained at:
Symetrix, Inc.
14926 35th Ave. West
Lynnwood, WA, 98037-2303
USA
20
The authorized representative located within the European Community is:
World Marketing Associates
P.O. Box 100
St. Austell, Cornwall, PL26 6YU, U.K.
Date of issue: May 28, 1999
Place of issue: Lynnwood, Washington, USA
Authorized signature:
Dane Butcher, President, Symetrix Incorporated.
21
440
440
22
Symetrix, Inc.
14926 35th Ave. West
Lynnwood, WA, 98037-2303
USA
Tel: (425) 787-3222
Fax: (425) 787-3211
Website: http://www.symetrixaudio.com
Email: [email protected]
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