Junger Audio b45 User Manual

4ch digital audio delay

b45

release 3.0

FOREWORD

Thank you for buying and for using the 4-channel Digital Audio
Delay B45.

Not only you have aquired the latest generation of digital
dynamic range processing, but also a piece of equipment
which is unique in its design and specification.

Please read this manual carefully to ensure you have all the
information you need to use the 4-channel Digital
B45.

The unit was manufactured to the highest industrial standards
and went through extensive quality control checks before it
was supplied.

If you have any comments or questions about installing,
setting-up or using the b45, please do not hesitate to contact
us.

Audio Delay

0

The information contained in this manual is subject to change without notice.
This manual is the copyright of Jünger Audio. All reproduction and copying, other than for legal
owner’s personal use, or disclosure of part or whole to a third party, is not allowed without prior
written authorization by Jünger Audio. © Jünger Audio, Berlin 2004

1

2. Function description ...........................................…….............

2.1 Basic description ...........................................…….................

2.2 Block diagram ..............................................…….................

2.3 Remote system ...............................................................…..

2.4 Link function / channel configuration .........................…........

2.5 Display of delay time .......................................................…..

2.6 Video format ....................................................................…..

2.7 Auto tracking .................................................................... …

2.7.1 Auto tracking by video sync ...............................……....

2.7.2 Auto tracking by TTL control signal ........................……

2.7.3 Auto tracking with offset ..........................................……

3. Installation ............................................................................

3.1 Unpack the unit ..............................................…...............

3.2 Power supply ...................................................…...............

3.3 Connections .....................................................…...............

3.4 Rack mounting ................................................…................

3.5 Operation safety ..............................................…..............

3.6 Synchronization of digital output ......................................

3.7 Remote Control ............................................….................

3.7.1. GPI Remote Control ......................................……..........

3.7.2. Tally Out ......................................................……............

3.7.3. Serial Remote Control .................................……............

4. Location of parts and controls ........................…....................

4.1 Front panel .......................................................……..............

4.2 Rear panel ........................................................…….............

4.3 Switches and jumpers for configuration ...........……..............

4.4 Selection of Auto Tracking mode ......................................

4.5 Selection of SDI Split Mode ..............................…….............

4.6 Selection of SDI audio group ...........................……..............

CONTENTS

2-1
2-1

2-2
2-3
2-4
2-4
2-4
2-5
2-5
2-6
2-6

3-1
3-1

3-1
3-1
3-1
3-1
3-2
3-3
3-3
3-4
3-5

4-1

4-1
4-2
4-3
4-4
4-4
4-5

5. Setup ..............................................……..............……………....

5.0 Description of setup operation ...........................................

5.1 Starting and selection of edit menus ..................................

5.2 Main display .......................................................................

5.3 Adjustment of delay time setup parameters .......................

5.4 Storage of presets .............................................................

5.5 Menu overview ..................................................................

6. Operation ............................………….......................................

6.0 Description of operation .....................................................

6.1 Working with presets .........................................................

6.2 Recall of presets ................................................................

6.3 Adjustment of delay time ...................................................

7. Boot display and trouble shooting ............................................

7.1 Boot display .......................................................................

7.2 Error messages and trouble shooting ................................

7.3 Initialization the unit ............................................................

8. Technical specifications ...........................................................

9. Warranty and service information ...........................................

5-1

5-1
5-2
5-2
5-3
5-3
5-4

6-1

6-1
6-2
6-2
6-2

7-1

7-1
7-1
7-2

8-1

9-1

2. FUNCTION DESCRIPTION

FUNCTION DESCRIPTION

The programmable digital audio delay b45 is a professional
studio device for delaying of 4 digital audio channels.

Digital audio delay b45 is working with a new processing
algorithm developed by Jünger Audio. It is possible to change
the delay time "glitch free" - without changing of pitch, without
noises or clicks. Readjustment of audio delay time under live
conditions - inaudible and fast done with the digital audio delay
b45!
The four channel configuration matches the audio capability of
Digital VTR's. B45 can be used as remotable and programmable
audio delay in digital video systems.

The unit is programmable,easy to operate and requires only a
limited number of settings for fast and efficient audio processing.

• 4 channel programmable digital audio delay

• "glitch free" changing of delay times

• auto tracking function

• up to 1,2 s delay time per channel

• user friendly preset and recall system

• external sync mode, AES/EBU or VIDEO

• RS-422 interface for serial remote

• GPI interface for parallel remote control input, tally output

2

2.1

BASIC
DESCRIPTION

operation manual b45, chapter 2 -Function description- page 2-1

2. FUNCTION DESCRIPTION

2.2

BLOCK DIAGRAM

page 2-2 operation manual b45, chapter 2 -Function description-

2. FUNCTION DESCRIPTION

The digital audio delay b45 is fitted with an serial remote
interface in RS-422 format.

Every device needs a device address to be registered in a
remote system. The address can be selected with the ADDR
switch on the rear panel. 16 addresses are selectable (0..F).
The preselected address is valid with next power-on reset.

Up to 16 delays b45 can be controlled from one remote panel
brc4x.

Device model name and device address are to recognize using
the remote protocol of serial remote interface by an automation
system or by PC. With it various boxes can be combined in one
remote system or remote chain. However a maximum of 16
devices per model can be controlled in one chain.

2.3

REMOTE SYSTEM

operation manual b45, chapter 2 -Function description- page 2-3

2. FUNCTION DESCRIPTION

2.4

LINK FUNCTION /
CHANNEL
CONFIGURATION

2.5

DISPLAY OF DELAY
TIME

2.6

VIDEO FORMAT

The LINK function is used for channel configuration regarding
delay time adjustment. It eables convenient setting of delay time
for a group of audio channels. Following links or channel
configuration are possiblel:

CH1 + CH2 + CH3 + CH4 (all 4 channels linked)
CH1 + CH2 CH3 + CH4 (two linked pairs)
CH1 CH2 CH3 CH4 (all channel independent)
The LINK function is a basic setting and is valid for all presets.
All linked channels are working with the same delay time.

Adjustment of delay time is valid for linked channels at the same
time.
The display is showing delay time for all four presets (not more
for individual channels) if all four channels are linked (P1 ...P4).

The adjusted delay time can be displayed in various time scale
formats. The time scale format is to select in DELAY menu. The
resolution for the adjustment is changing with selection of
specific time scale format. For some formats (f.i. frames)

adjustment is possible in larger steps only.
Time scale format can be different for different presets. Time
scale format will be stored by storing adjustments into the preset.

To get the right delay time (as absolut time value) it is necessary

to set the correct video format (PAL/NTSC). The video format is

to select in setup menu.

If the unit is synchronized to video reference the selection of

video format is done automatically independent of the video
format selection in setup menu.

page 2-4 operation manual b45, chapter 2 -Function description-

2. FUNCTION DESCRIPTION

The digital audio delay b45 can be used in Auto Tracking Mode.
Auto Tracking means the control of current delay time by specific
generated control signal. Together with the „glitch free“ changing
of delay time Auto Tracking works without any noises or
detoriation in the audio signal.

The control signal for auto tracking can be generated in different
ways. Depending on the generation of the control signal it is
causing a different maximum length of auto tracking delay time.
There are two basic methods to generate the control signal. First
one is the comparison of two video signals. The video program
signal (VIDEO TRACKING) will be compared with video
reference (VIDEO SYNC). Difference in time between both
vertical intervals is used as auto tracking delay time. Second way
is to use a TTL signal. The length in time of the pulse signal is
measured and will be used as current delay time.
Selection of auto tracking mode is done by setting jumper J2 on
tracking board (see also 4.4).

The digital audio delay b45 can generate the auto tracking
control signal by comparison of two video signals. To calculate
the auto tracking delay time the algorithm compares the video
program signal (VIDEO TRACKING) with video reference
(VIDEO SYNC). The difference in time between both vertical
intervals is used as auto tracking delay time. The maximum
difference and in this way the maximum delay time is one video
frame (PAL = 40 ms).

VIDEO
SYNC

VIDEO
TRACKING

t = t

t

vt

- tracking delay time

vt

2.7

AUTO TRACKING

2.7.1

AUTO TRACKING BY
VIDEO SYNC

operation manual b45, chapter 2 -Function description- page 2-5

2. FUNCTION DESCRIPTION

2.7.2

AUTO TRACKING
BY TTL CONTROL
SIGNAL

2.7.3

AUTO TRACKING
WITH OFFSET

The digital audio delay b45 can generate the auto tracking

control signal by using a TTL control signal. To calculate the auto

tracking delay time the detection circuit is measuring the HIGH

period of the TTL input signal. The length in time of the HIGH

period is used as delay time for auto tracking. The maximum
delay time shouldn’t be more as the maximum memory capacity
of the delay (see technical specifications). Otherwise it produces
a memory overflow and an error message will be displayed.
Every new positive pulse at TTL input is measured and is
overwriting the last calculated value.

VIDEO
SYNC

VIDEO

TRACKING
TTL PULSE

t

t = t

vt

- tracking delay time

vt

There is the possibility to activate auto tracking even if a fixed

delay time is preadjusted. The already adjusted delay time is an

offset to the auto tracking delay time. Please note that the overall

delay time consisting of delay offset and auto tracking delay time

shouldn’t be more as the maximum memory capacity of the
delay (see technical specifications). Otherwise it produces a
memory overflow and an error message will be displayed. The
use of the unit is blocked to prevent deteriorated audio signals at
digital output.

t

= maximum memory capacity per channel

vmax

auto tracking video with offset

auto tracking video with offset, error message overflow

auto tracking TTL with offset, error message overflow
Note! In auto tracking TTL auto tracking delay time can be
longer as one videoframe!

page 2-6 operation manual b45, chapter 2 -Function description-