Biamp DDL12 User Manual

ADVANTAGE® DDL12

Digital Delay Line

Operation Manual

®

5/5/98

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

an affiliate of Rauland Borg Corp.

DDL12

TABLE OF CONTENTS

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

pg. 2

pgs. 3~5
pgs. 6 & 7
pgs. 8 & 9

pgs. 10 & 11

pg. 12

INTRODUCTION

The ADVANTAGE®
1-input by 2-output digital delay. Gain & delay settings are adjusted via
Windows

®

95 programming software, eliminating the need for front panel

Digital Delay Line is a programmable DSP-based

DDL12

controls or security codes, and providing a completely tamper proof unit. Up to
8 presets may be stored in non-volatile memory, and recalled via
programmable logic inputs. The DDL12 is covered by a five-year warranty.

features include:

DDL12

1-in/2-out DSP-based programmable dual-tap digital delay

♦

balanced input & outputs on plug-in barrier strip connectors

♦

variable input & output levels with metering & bypass mode

♦

broad delay range useful for room delay or driver alignment

♦

distance calculations & ‘automatic’ unity gain for easy setup

♦

48kHz sampling rate with 16-bit sigma delta converters

♦

64x oversampling A/D (in) & 128x oversampling D/A (out)

♦

eight non-volatile memory presets store/recall delay settings

♦

programmable logic inputs for remote control via switches

♦

no manual controls on chassis, to help prevent tampering

♦

controls & indicators provided by software graphic interface

♦

RS-232 serial port & Windows® 95 programming software

♦

incorporates

♦

marked and

♦

covered by Five-Year "Gold Seal" Warranty

♦

recommended grounding practices

AES

UL / C-UL

listed power source

1

FRONT & REAR PANEL FEATURES

ADVANTAGE DDL12

Digital Delay Line

on

27V

~

50/60 Hz

10 watts

class 2 wiring

On Indicator:

3216842

1

device # serial port link port

last

2400

9600

19200

baud rate logic inputs

This red LED indicates power is applied to the unit.
The DDL12 provides no power switch. Power is applied by simply
plugging the wall-mount transformer into a proper AC outlet.

output 2 output 1

Baud Rate:

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

AC Power Cord:

The power transformer provides 27 Volts AC to
the DDL12, and is detachable via a 5-pin DIN connector. The
DDL12 has two internal ‘self-resetting’ fuses (there are no user
serviceable 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 DDL12 requires service.

raising the corresponding switch. The two switches on the far right
are not used. The switch on the far left (labeled ‘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).

Device #:

assigned a specific device number. Up to 64 different device
numbers (0~63) may be assigned to allow RS-232 control of
multiple ADVANTAGE
factory, the DDL12 is assigned Device # 1.

This 6-gang DIP switch allows the DDL12 to be

Logic Inputs:

®

products in a common system. From the

logic inputs for controlling the DDL12 via contact-closures (see
Logic Inputs on pg. 6). Logic Inputs have the following pin
assignments (right-to-left & top-to-bottom):
Inputs 1~8;

95

using the PC Control Software and serial cable provided with the
DDL12 (see Setup on pg. 4). From the factory, Logic Inputs 1~8
are programmed to recall presets 1~8 respectively.

Input:

line-level input. For balanced connection, wire high to (+), low to
(-), & ground to (
and ground to both (-) & (
RS-232 control (see Setup on next page).

Output 1 & Output 2:

Serial Port:

This 9-pin Sub-D (male) connector provides an RS­232 Serial Port for remote control via computer or third-party
controllers (see RS-232 Control on pg. 8). The Serial Port has the
following pin assignments (left-to-right & top-to-bottom):
not used;
Data (TxD) output;

Ground;

Pin 5)

output;

Pin 8)

Receive Data (RxD) input;

Pin 2)

Data Terminal Ready (DTR) output;

Pin 4)

not used;

Pin 6)

not used;

Pin 7)

not used. PC Control Software

Pin 9)

Pin 3)

Request To Send (RTS)

and a serial cable are provided for programming via Windows
(see Setup on pg. 3).

NOTE: The Serial Port can also transmit

Pin 1)

Transmit

®

commands received via the Logic Inputs (see Setup on pg. 4).

provide the two independently delayed balanced line-level outputs.

Link Port:

Port for RS-232 control of multiple ADVANTAGE
RS-232 Control on pg. 8). The 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).

This 9-pin Sub-D (female) connector provides a Link

®

products (see

For balanced connections, wire high to (+), low to (-), and ground
to (

ý

(
when outputs are unbalanced. Output gain is adjusted via

NOTE:

software or RS-232 control (see Setup on next page).

ý

), leaving (-) unconnected. Signal level will be reduced by 6dB

All but the final device in a system should have its ‘last’ switch
down (see Baud Rate)

assignments (right-to-left & top-to-bottom):

Transmit Data (TxD) output;

2)

not used;

Pin 4)

used;

not used;

Pin 8)

. The Link Port has the following pin

not used;

Pin 1)

Receive Data (RxD) input;

Pin 3)

Pin 5)

Ground;

not used.

Pin 9)

not used;

Pin 6)

NOTE: The Link Port

Pin 7)

Pin

not

will also transmit commands received via the Logic Inputs (see
Setup on pg. 4).

input

BIAMP SYSTEMS

Portland, Oregon

an affiliate of

Rauland-Borg Corp.

DDL12

MADE IN U.S.A.

This 6-gang DIP switch allows the DDL12 to be

This 9-pin Sub-D (female) connector provides eight

Pins 1~8)

switch ground. Logic Inputs are programmed

Pin 9)

These plug-in barrier strip terminals provide a balanced

ý

). For unbalanced connection, wire high to (+),

ý

). Input gain is adjusted via software or

These plug-in barrier strip terminals

). For unbalanced connections, wire high to (+) and ground to

Logic

2

SETUP

All DDL12 parameters are adjustable using the Windows® 95 'PC Control Software' and serial cable provided with the unit. The PC Control
Software provides programs for various ADVANTAGE® products, including the DDL12. The DDL12 program includes three different
control screens (Main, Logic Input & Button Definition & Configuration Options), which are described on the following pages. Once the
software is started (and Comm Port Configuration is set), the control screens are accessible through the drop-down menus at the top of the
opening screen. The Main screen appears whenever a DDL12 file is opened. Logic Input & Button Definition
screens are then available from the Configure DDL12 menu. The File menu provides functions such as open, close, save, etc. The
Settings menu recalls the Comm Port Configuration screen. The Window menu arranges the active product screens. The Help menu
explains the available adjustments. To install PC Control Software: Select ‘Run’ from Windows® 95 ‘Start’ menu, and enter A:\SETUP.
System Requirements: Windows® 95 with 8M of RAM & 2M of available hard disk space (serial port required for ‘on-line’ operation).

and Configuration Options

MAIN SCREEN

The Main Screen is used to adjust the DDL12 input/output levels & delay times, as well as to store & recall the eight memory presets
Adjustments are made with the computer mouse (or keyboard). Levels are adjusted by dragging the corresponding ‘faders’ up or down.
Input Sensitivity adjusts for the proper input signal peak reference level by providing up to 24dB of attenuation, adjustable in 1dB steps.
The DSP Level meter will display the corresponding input signal level. For best performance, adjust Input Sensitivity so the DSP Level
meter shows occasional peaks in the yellow area,
time is shown in the window, with adjacent buttons providing the up/down adjustments. Left-clicking coarse buttons will change the delay
time in 1 milli-second increments. Left-clicking fine buttons will change the delay time in 21 micro-second increments. Delay time may also
be entered directly into the window, but will be rounded to the nearest available setting. Left-clicking msec allows delay times to instead be
entered & calculated in terms of distance measurements (inches, feet, centimeters, or meters). Left-clicking Bypass temporarily sets delay
for that output to minimum, but has no effect on input/output gain settings. Level provides gain adjustment for that output, but the range
will be affected by the Input Sensitivity settings. Left-clicking Unity will link that output Level fader to the Input Sensitivity fader, maintaining
a constant unity gain setting through the DDL12. Left-clicking a Preset button will recall the corresponding preset from non-volatile
memory. Left-clicking the Store button will open a drop-down menu for storing current settings in any of the Presets 1~8. Logic Inputs are
strictly indicators of remote on/off activity at the Logic Inputs. 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.

but never to the red (top).

Output 1 & Output 2 provide delay & gain adjustments. Delay

.

NOTE: Distances should be measured in terms of the difference between direct and delayed sound sources, with respect to the listene r
(i.e...direct source to listener = 200 feet; delayed source to listener = 20 feet; distance = 180 feet). Also, when sounds from the direct
source & delayed source reach the listener at roughly the same volume level, additional delay (approximately 10~30 milliseconds ) may be
added to the calculated delay time. This added delay will produce what is known as the ‘Haas Effect’, which gives the listener the
impression that all sound is emanating from the direct source. This added delay should be fine-tuned by ear to achieve the desired results.

3

SETUP

LOGIC INPUT & BUTTON DEFINITIONS SCREEN

The Logic Input & Button Definitions screen is used to assign specific ‘recall preset actions’ to the Logic Inputs (and remote control
buttons). Logic Inputs allow remote control of preset selection via external circuits, such as switches, contact-closures, active driver
circuits, and/or ‘open-collector’ logic outputs (see Logic Inputs on pg. 6). From the factory, Logic Inputs 1~8 are programmed to recall
presets 1~8 respectively. However, using the Logic Input & Button Definitions screen, each Logic Input may be assigned differe nt ‘recall
preset actions’. Left-clicking on a numbered button will select that Logic Input to be defined. Left-clicking on Preset Actio n will open a
drop-down menu of the available recall preset actions. Left-clicking the desired recall preset action will then assign that action to the
currently selected Logic Input. Since Logic Inputs are controlled by switches, contact-closures, etc., each Logic Input may be assigned
certain recall preset actions to perform when the switch is ‘opened’, and different recall preset actions to perform when that same switch is
‘closed’. Left-clicking on Echo Character opens a drop-down menu, which allows the ‘echo’ character for the selected Logic Input to be
changed. This is the RS-232 ASCII character which will be transmitted via the Serial Port whenever that Logic Input is switched. From the
factory, no echo characters are assigned to Logic Inputs 1~8. Changing the echo character is used primarily for customizing remote
control commands amongst various RS-232 controlled products within a system (see RS-232 Control on pg. 8).

NOTE: Unlike other
remote controls, the DDL12 Logic Inputs do not include a ‘repeat’ function. Therefore, a Logic Input in an ‘opened’ or ‘closed ’ state will not
continuously repeat an echo character via RS-232

can still receive echo characters (via RS-232) from other ADVANTAGE

. Although the DDL12 does not accept infrared or wall-mount remote controls itself, it

®

products which are utilizing these types of remote controls. From
the factory, Remote Control Buttons have equivalent ASCII characters permanently assigned to them (see RS-232 Control on pg. 8).
Therefore, recall preset actions can be assigned to Remote Control Buttons in the same way they are assigned to Logic Inputs. Left­clicking on Clear opens a drop-down menu, which allows recall preset actions to be cleared from the selected Logic Input (or all Logic
Inputs). Left-clicking on Default opens a drop-down menu, which allows recall preset actions to be set back to the factory default for the
selected Logic Input (or all Logic Inputs). Left-clicking on Try It causes the recall preset actions currently assigned to the selected Logic
Input to be performed by the DDL12. Left-clicking on Help provides additional instruction. Left-clicking on Close will close the Logic Input
& Button Definitions screen.

4