Biamp SMS200 User Manual

SMS200

Sound Masking

System

operation manual

®

Biamp Systems, 10074 S.W. Arctic Drive, Beaverton, Oregon 97005 U.S.A. [phone] http://www.biamp.com

an affiliate of Rauland Borg Corp.

Print Update

April 11, 2000

Sound Masking System provides a digitally controlled

tant filter bandwidth at any setting. The SMS200 is

TABLE OF CONTENTS

Front Panel
Rear Panel
Setup
Logic Inputs
RS-232 Control
Applications
Specifications & Block Diagram
Warranty

pg. 2
pg. 3

pgs. 4~6

pg. 7

pgs. 8~9

pgs. 10~11

pg. 12

SMS200

INTRODUCTION

ADVANTAGE
1/3-octave equalizer, with a digital noise source in a single rack-space unit.
Input, noise, and 28 filter bands, as well as high-pass & low-pass filters, are all
adjusted via computer. Eight presets are recalled via contact-closures, third­party controllers, or computer. Filter design utilizing Constant-Q technology
guarantees precise system tuning with less filter interaction, better filter
combining, and cons
covered by a five-year warranty.

SMS200 features include:

♦ 1/3-octave equalizer with built-in sound masking generator
♦ white-noise generator spectral purity (±0.1dB @ 0Hz~20kHz)
♦ precision pink-noise filtering (-3dB per octave low-pass)
♦ extended ‘non-apparent’ repeat time of noise (200 minutes)
♦ 28 digitally controlled filters on ISO center frequencies
♦ Constant-Q technology provides precision system tuning
♦ filters adjustable ±12dB in 1dB steps or
♦ noise & input levels adjustable ±12dB in 1dB steps (plus off)
♦ high-pass filter (12dB per octave) adjustable 9.1Hz~171.9Hz
♦ low-pass filter (12dB per octave) adjustable 1.9kHz~34.7kHz
♦ eight non-volatile memory presets available (levels & filters)
♦ logic inputs allow selection of presets via contact-closures
♦ RS-232 serial port for computer or third-party controllers
♦ software for Windows
♦ device number switch & link port for controlling multiple units
♦ baud rate switch provides choice of communications rates
♦ front panel indicators for peak, bypass, & selected preset
♦ balanced input and output on plug-in barrier strip terminals
♦ modular ±12 Volt DC Out jack for powering external devices
♦ incorporates AES recommended grounding pratices
♦

marked and UL / C-UL listed power source

♦

covered by Five-Year "Gold Seal" Warranty

®

SMS200

±6dB in 0.5dB steps

®

95/98/NT & serial cable included

1

FRONT PANEL

Preset: This seven segment LED display indicates which
preset is currently selected. There are eight presets available,
which can be recalled from non-volatile memory via RS-232 or
Logic Input control. Each preset stores settings for input level,
noise level, 28 filter bands, a high-pass filter, and a low-pass
filter. These settings are adjusted, and presets are stored, via
RS-232 control, using the PC Control Software and serial cable
provided with the SMS200 (see Setup on pg. 4). The SMS200
may also be controlled via RS-232 from third-party controllers.

ADVANTAGE SMS200

preset

Sound Masking System

onbypasspeak

Peak: This red LED indicates output level has reached +14dBu
balanced (+8dBu unbalanced). When the Peak indicator lights,
10dB of headroom remains before clipping. If increased signal
levels or equalizer adjustments cause the Peak indicator to light
frequently, reduce the SMS200 input & noise levels to avoid
distortion caused by overdriving the output section.

Bypass: This red LED indicates the SMS200 equalizer has
been bypassed via RS-232 control. When bypassed, all filters
are temporarily set flat, the high-pass & low-pass filters are set
to their extremes (9.1Hz & 34.7kHz respectively), and the input
level is set to unity gain. From the factory, noise level is not
affected by Bypass (see Setup on pg. 6).

On: This red LED indicates power is applied to the equalizer.

2

REAR PANEL

27V

~

50/60 Hz

15 watts

class 2 wiring

AC Power Cord: The power transformer provides 27 Volts AC
to the SMS200, and is detachable via a 5-pin DIN connector.
The SMS200 has two internal ‘self-resetting’ fuses (there are no
user servicable parts inside the unit). If the internal fuses blow,
they will attempt to re-set after a short period. However, this
may be an indication that the SMS200 requires service.

DC Out: This 6-pin Modular jack supplies ±12 Volts DC, for
powering external accessory devices. The SMS200 DC Out
provides up to 100mA maximum current.

Device #: This 6-gang DIP switch allows an SMS200 to be
assigned a specific device number. Up to 64 different device
numbers (0~63) may be assigned to allow RS-232 control of
multiple ADVANTAGE
the factory, an SMS200 is assigned Device # 1.

Serial Port: This 9-pin Sub-D (male) connector provides an
RS-232 Serial Port for remote control via computer or third-party
controllers. The Serial Port has the following pin assignments
(left-to-right & top-to-bottom): Pin 1) not used; Pin 2) Receive
Data (RxD) input; Pin 3) Transmit Data (TxD) output; Pin 4)
Data Terminal Ready (DTR) output; Pin 5) Ground; Pin 6) not
used; Pin 7) Request To Send (RTS) output; Pin 8) not used;
Pin 9) not used. PC Control Software and a serial cable are
provided for programming via Windows

4). NOTE: The Serial Port can also transmit commands which

are received via the Logic Inputs (see Setup on pg. 5).
Link Port: This 9-pin Sub-D (female) connector provides a Link

Port for RS-232 control of multiple ADVANTAGE
Link Port of one device simply connects to the Serial Port of the
next device (and so forth). Link cables are available as an
option (Biamp #909-0057-00). NOTE: All but the final device in

a system should have its ‘last

The Link Port has the following pin assignments (right-to-left &
top-to-bottom): Pin 1) not used; Pin 2) Transmit Data (TxD)
input; Pin 3) Receive Data (RxD) output; Pin 4) not used; Pin

5) Ground; Pin 6) not used; Pin 7) not used; Pin 8 ) not
used; Pin 9) not used. NOTE: The Link Port can also transmit

commands which are received via the Logic Inputs (see Setup
on pg. 5).

DC out

16

32

124

8

device #

serial port

®

products in a common system. From

link port

®

95 (see Setup on pg.

2400

last

19200

9600

baud rate

®

products. The

’ switch down (see Baud Rate).

logic inputs

output

input

BIAMP SYSTEMS

Portland, Oregon

an affiliate of

Rauland-Borg Corp.

MADE IN U.S.A.

Baud Rate: This 6-gang DIP switch allows an SMS200 to be
assigned a specific communications baud rate. Baud rates
available are 2400, 9600, & 19200 bps. The factory default is
9600 bps. Only one baud rate should be selected at a time, by
raising the corresponding switch. The two switches on the far
right are not used. The switch on the far left (labelled ‘last’) is
used when connecting multiple devices in a ‘Link Port to Serial
Port’ configuration (see Link Port). From the factory, the ‘last’
switch is up. When connecting multiple devices, the ‘last’ switch
must be switched down on all devices except

the final (‘last’)

device in the system (the device with no Link Port connection).
Logic Inputs: This 25-pin Sub-D (female) connector provides

16 logic input terminals, plus 9 ground terminals (see Logic
Inputs on pg. 7). Once SMS200 settings are adjusted (and
presets are stored) via RS-232 control, the Logic Inputs can be
used to recall presets from non-volatile memory using simple
switches or contact-closures. Logic Inputs have the following pin
assignments (right-to-left & top-to-bottom): Pins 1~8) recall
Presets 1~8; Pins 9~16) no operation; Pins 17~25) switch
ground points. Logic Input functions may be programmed using
the PC Control Software and serial cable provided with the
SMS200 (see Setup on pg. 4).

Output: These plug-in barrier strip terminals provide a
balanced line-level output. For balanced connection, wire high
to (+), low to (-), and ground to (
wire high to (+) and ground to (

ý

). For unbalanced connection,

ý

), leaving (-) unconnected.
Signal level will be reduced by 6dB when outputs are wired
unbalanced.

Input: These plug-in barrier strip terminals provide a balanced
line-level input. For balanced connection, wire high to (+), low to
(-), and ground to (
(+), and ground to both (-) & (

ý

). For unbalanced connection, wire high to

ý

). Input level is adjustable via RS-

232, and has a range of ±12dB in 1dB steps, plus off.

3

SETUP

All SMS200 parameters are adjustable using the Windows
Control Software provides programs for for various ADVANTAGE
different control screens (Main

, Button Definition, & Configuration Options), which are described on the following pages. Once the software
is started (and Comm Port Configuration is set), the three control screens are accessable through the drop-down menus at the top of the
opening screen. The Main
then available from the Configure SMS200
copy/paste & flat-curve functions. The Settings
product screens. The Help
and enter A:\SETUP. System Requirements

screen appears whenever an SMS200 file is opened. Button Definition & Configuration Options screens are

menu. The File menu provides functions such as open, close, save, etc. The Edit menu allows

menu recalls the Comm Port Configuration screen. The Window menu arranges the active

menu explains the available adjustments. To install PC Control Software: Select ‘Run’ from the ‘Start’ menu,

: Windows® 95/98/NT with 16M RAM & 5M of available hard disk space (serial port required

for ‘on-line’ operation).

®

95/98/NT ’PC Control Software’ and serial cable provided with the unit. The PC

®

products, including the SMS200. The SMS200 program includes three

MAIN SCREEN

The Main Screen is used to adjust the SMS200 signal level, noise level, 28 filter bands, high-pass filter, and low-pass filter settings, as well
as to store & recall eight memory presets. Adjustments are made with the computer mouse (or keyboard). Settings are adjusted by
dragging the corresponding ‘faders
(±12dB). Left-clicking on +/-12 dB

’ (or left-clicking the arrow buttons). Each filter band fader provides 25 gain steps, in 1 dB increments

will instead select 0.5 dB increments (±6dB). Left-clicking above or below a fader will adjust the gain
three steps at a time. High Pass & Low Pass filters provide 16 frequency steps. Left-clicking to the left or right of the fader will adjust the
frequency 4 steps at a time. The Level faders each provide 26 gain steps (±12dB, plus off). Right-clicking in the filter band area opens a
drop-down menu, which allows copy/paste & flat curve functions. Left-clicking a Preset
non-volatile memory (presets are stored automatically). Left-clicking the Bypass

button will recall the corresponding preset from

button will temporarily bypass filter & level settings (see
Configuration Options screen on pg. 6). The title bar across the top of the Main screen will indicate the Device #, the custom Device
Name, and the model of product being controlled. The PC Control Software can operate ‘off-line’ (with no product connected) by opening a
‘new’ file for the desired product. The Device # for ‘off-line’ files is assigned sequentially as a negative number.

4