adt-audio SRC 51 User manual

Installation
Manual
Part II:
Connectors
Pinning Diagrams
Description of Connectors
for Consoles without Patchbay
analoge + digitale Tonstudiotechnik Karl Jüngling • Inh. Dipl.-Ing. Gerd Jüngling
4-6, Scholtwiese • Gladbeck • 45966 • NRW • Germany • Phone: [phone] • Fax: [phone]
E-Mail: [e-mail] • Internet: www.adt-audio.com www.broadcast-console.com
Version 1.6/14 • English
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Summary
Preface.................................................................. 3
3. Connectors...................................................... 4
3.1 Technical data of Inputs and Outputs .................. 4
3.2 Connector Types...................................................... 5
3.3 Connector Panels ................................................... 7
Input Channel Connector Panels................... 7
Master Section Connector Panel...................... 8
Connectors on the Master Panel in brief........ 8
Pinnings of the Master Connectors................ 10
Mix Outputs........................................................ 10
Mix-Insert Out / Cue Out................................. 10
Mix-Insert In / Aux 1 & Aux 2 Out.................. 10
CTR-Insert Out / Aux 3 & Aux 4 Out.............. 11
Control-Room Insert In & 2-Track C Repro.....11
CTR-Surruond Speaker Out.............................. 11
CTR-Stereo Speaker Out................................... 12
6-Track/2-Track A Repro................................... 12
6-Track/2-Track B Repro................................... 12
2-Track 9-12 Repro............................................. 13
2-Track 13-16 Repro........................................... 13
2-Track 17-20 Repro........................................... 13
2-Track 21-24 Repro........................................... 14
Studio Phones & Speakers............................... 14
Talkback Audio.................................................. 14
Talkback Control............................................... 15
User Switch......................................................... 16

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Preface
This manual contains all information that is necessary to prepare and plan
the installation of the mixing console and accessory components.
Please, read this manual carefully. We point out common mistakes and
problems that are connected with the installation and provide suggestions
to avoid such problems. You will save a lot of time and unnecessary start
up problems by investing a couple of hours in the reading of this manual.
The rst part of the manual contains everything about the power supply
units and crossover devices that are necessary for fail safe power supply
congurations and the implementation of the mains connections. Part 2
is about the audio installation. Besides detailed information about basic
principles of audio installation and the methods of grounding, this chapter
contains all pinning diagrams, the locations of the connectors, and a
detailed description of their functions. Part 3 contains general information
about the assembly of the console, environmental considerations, the
recommended maintenance, and a couple of remarks about the operation
of the console to ensure a long and problem free lifespan.
This manual concerns the 5.1 surround sound
versions of the SRC51 console system for consoles
without patchbay
Version V1.6/2014
Another manual is available for Consoles
with patchbay

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3. Connectors
3.1 Technical data of Inputs and Outputs
The characteristic data of all audio inputs and outputs of the modules are
identical. Here is a listing of the basic data of the different types.
Level
The nominal level of the SRC51 system is determined by the customer. It
is only xed by the adjustment of the system meters that can be set to
any level between 0 dBu and +15 dBu. If no nominal level is specied by
the customer, it will be set to + 6 dBu = 1.55 V RMS
Headroom
The maximum level of a particular signal chain always refers to an overall
gain of 0 dB. With positive gain values, the maximum value is equivalent
to the output value, with negative gain settings, the maximum value
is equivalent to the input level. The design of the internal circuitry can
handle the maximum level in each stage of the signal chain; however, if
the internal chain adds gain stages and attenuation stages as well, the
maximum level is the level of the circuit of the highest level in the chain.
Transmission Band
The entire system is designed for the transmission of audio frequencies
between 20 Hz and 50 kHz. Variations of the amplitude vs frequency
(frequency response) are in accordance to German IRT rulebook 3/5.
The worst case value for any line level signal chain is > +/- 0.5 dB
RF- and Subsonic Filters
The suppression of subsonic and RF frequencies depends on the execution
of the internal lters. The default lters are adjusted for edge frequencies
(- 3 dB) of < 10 Hz and > 120 kHz. Other values in accordance to
customers requirements are possible.
The suppression of subsonic and RF frequencies for microphone pream-
pliers defaults to edge frequencies (- 3 dB) of < 15 Hz and > 80 kHz.
Other values in accordance to customers requirements are possible.
Inputs
Microphone inputs
All microphone inputs are transformer balanced and oating. The input
impedance is > 2kOhm in the transmission band without input pad and
> 3 kOhms with pad. CMRR in accordance to IRT standards is > 70dB at
frequencies <=15 kHz.
Line level inputs
All line level inputs, including insert inputs, are electronically balanced.
Electronically balanced line level inputs
Nominal level + 6dB (or custom level, respectively)
Maximum level from 20 Hz to 50 kHz is >= +30 dBu.
Input impedance in the transmission band > 8 kOhm.
CMRR corresponding to IRT rulebook measurement method
> 50 dB, in the transmission band
Outputs
All outputs are electronically balanced. The maximum output level of all
outputs is >= + 30 dBu into a higher load than 1200 Ohms, >= + 26 dBu
into 600 Ohms load, and >= + 21 dBu into 300 Ohms load between 20 Hz
and 50 kHz. Overloading outputs by low load resistances does not affect
the internal headroom.
Nominal level +6dB (or custom level, respectively)
Source impedance < 50 Ohms
CMRR/IEC > 34 dB, typical value 46 dB
Level Diagram
The entire level diagram of the SRC51 console system is at. All inputs,
outputs, and inserts operate on the same level. In combination with the
high supply voltage of +/- 25 Volts this principle results in an overall
headroom of more than + 30 dBu throughout the entire console circuitry.
Since full level is processed on all ampliers, processing stages and the

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mixing busses as well, maximum dynamic range is achieved, also as far as
the mix noise is concerned. The mix noise in particular suffers from a level
diagram, that uses lower internal levels to achieve a nominal higher output
level.
3.2 Connector Types
Four versions of the connector panel
The connections for each module type of the SRC51 consoles are
standardized. There are two types of connector panels.
Please note that this manual concerns the SRC51 version without
internal patchbay. Patchbay versions use different connector
panels.
Version 1 is used for all types of input modules for consoles without
internal patch bay.
Version 2 is used for the master section
The master panel also contains the power supply connector. One of
these panels is part of each SRC51 console.
Location of the connector panels
The connector panels are mounted right behind the belonging input
modules, and behind the master section at the rear side of the frame. The
connector panels are inside the frame and can be covered by additional
rear cover sheets. A row of metric 4 mm threads allows the installation
of cable clips at the rear bottom of the console frame. These clips can
be used to hold the cable tree. The connector panels are mounted
approximately 75 mm inside the frame.
Routing bus and master bus Assignment
The assignment of the 16 routing bus rails to the module slots is part of
the frame installation. It can be changed by the rearrangement of jumpers
on the frame boards. See the drawings of the frame boards for details
on this conguration. This conguration determines which routing bus
is connected to a particular module slot. If not otherwise specied, the
busses will be assigned to the rst 16 channels in the frame.
The module slots for the entire master section are entirely different as far
as the wiring pcb’s in the frame are concerned. These boards contain the
assignment of the main master busses and the auxilliary busses to the
corresponding master ampliers. There are also a couple of conguration
options for custom modications and add ons as well as special console
versions. If you’re in doubt if your console has some special features that
affect the connector pinning, please ask.
While the master section requires a total of 4 module slots to be fully
functional, some frames add another 4 to 8 slots right next to the master
section. These slots are usually used for the keyboard of the optional
automation system; however they can be used for customers remote
switches, other keyboards, mouse pads, etc. We recommend to include an
appropriate number of free slots to have some free space available.
Pinning
Only 3-Pin XLR connectors, TRS-connectors and female 25-pin D-Sub
connectors are used for all audio connections of the entire console.
XLR 3-Pin connectors use the standard connection scheme with + on 2,
- on 3 and screen on 1. The 25-pin D-Sub connectors use the common
“Tascam” pinning with 8 balanced audio lines. See the drawings on the
next pages for details. The different pinnings of the D-Sub connectors are
described on the following pages.
IMPORTANT NOTE:
All D-Sub connectors use UNC4-40 xing nuts.
Screening
All screen contacts of all audio connectors are internally connected to
ground. This means that each pin 1 of an XLR, the sleeves of the TRS
jacks and the 8 screen pins of a 25-pin D-Sub are connected to an internal
ground network of the console that is bridged to audio ground. Read the

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chapter about the audio installation about our recommendations
what principles of wiring should be used.
As mentioned in this chapter, all screen pins are separted from
ground. If the console has to be installed in a very ‘dirty’ electric
environment, it is possible to oat the entire connector ground
network and connect to audio ground via a low ohm resistor
of approximately 1 to 5 ohms. This will avoid any ground loop
current. However, call us for advice before you do so.
The exception from this principle are the microphone input
screens. Since the microphone input screens are used as return
path of the phantom power, compensation currents on these
screen lines can reduce the signal to noise of the sensitive
microphone inputs considerably. For this reason, the microphone
input screens are directly connected to the ground of the
particular input modules.
Please, make shure that you don’t connect this ground
to other grounds on separate connector panels or patch
bays.
Connecting these grounds to other ground terminals might cause
ground loops that reduce the signal to noise performance of the
microphone preamps and the mixing busses as well.
The best choice is always to take care about clean grounding,
before any kind of compensation techniques are used. Please,
aks for advice (0049 2043 51061 – [e-mail]) if
you have any questions or problems.
Special Terms:
* Connector-ground:
separate ground network that connects all screen contacts of the
audio lines
** Audio-ground:
the internal electrical audio reference ground of the console

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3.3 Connector Panels
The connector panels for input channels combines 4 module slots. The connector panel of the
master section is 4 slots wide. Each connector panel is located behind the belonging modules.
Input Channel Connector Panels
The input connector panel can be used with all sorts of input channels.
The 3-pin XLR connectors are used for the microphone input, the line/keyboard input, the mon-
(daw-return) input, and the
channel output (daw-send)
with the IM5 mono input mo-
dules. Two TRS jacks are used
for insert send and insert re-
turn.
The function of a particular
connector changes with the ty-
pe of the module that is in-
stalled in the corresponding
slot. The use of the different
connectors for IS5 stereo in-
put modules and ISR surround
input modules is printed in the
middle of the connector panel.
The pinning of the xlr connectors and the TRS jacks meets international standards:
XLR:
1 = screen, 2 = core a / +, 3 = core b / -.
TRS:
Tip = core a / +, Ring = core b / -, Sleeve = screen
All audio lines are fully balanced and at nominal level. Since all modules have swit-
ched insert points, there is no need to connect the insert inputs and outputs ex-
ternally. The insert point is only activated when the insert switch of the particular
channel is pressed.
AUDIO 8
SubD-25 Connector
Female in Console Frame
STANDARD AUDIO LINES
ON SubD-25 CONNECTORS
AUDIO 7
AUDIO 6
AUDIO 5
AUDIO 4
AUDIO 3
AUDIO 2
AUDIO 1
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2
3
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9
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16
17
18
19
20
21
22
23
24
25
+
-
Screen
+
-
Screen
+
-
Screen
+
-
Screen
+
-
Screen
+
-
Screen
+
-
Screen
+
-
Screen
nc
INSERT(L)
SRC51
IN INSERT(L)
MIC-IN
LINE-IN
IN-L
SURROUND:
STEREO:
SURROUND:
INS-IN-R
STEREO:
IN-L
IN-SL
INSERT(L)
CH-OUT
MON-IN
OUT IN
SURROUND:
STEREO:
SURROUND:
IN-R
IN-R
IN-SR
LFE
IN
SURROUND:
STEREO:
INS-OUT-R
C
IN
OUT IN
MIC-IN
LINE-IN
INSERT(L)
CH-OUT
MON-IN
OUT IN OUT
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The Master Section Connector Panel
This connector panel is located right behind the master section of the con-
sole. It holds 17 D-Sub connectors, the power connector and a ground
connector. Even though the pinning of all connectors is the same with all
versions of the console. There are 15 25-pin female audio connectors and
2 25-pin male control connectors.
The Connectors on the Master Panel in Brief
TB-Audio
Audio inputs and outputs of the talkback-, listen-, and oscillator section.
This connector is only functional, is the TBO talkback module is installed.
TB-Control
Control inputs and outputs of the talkback-, listen-, and oscillator section.
This connector is only functional, is the TBO talkback module is installed.
User-Switch
4 switches for user functions are installed in the optional TBO talkback
Connector Bay of a SRC51 Console
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ba
1
2
3
4
5
6
7
8
9
10
11
12
13
GND
SRC51
POWER-IN
2TR/21-24
2TR/17-20
TB-CTRL
TB-AUDIO
2TR/13-16 6TR/2TR-B
USER-SWIITCH
2TR/9-12 6TR/2TR-A
SRD-SPK
MIX-INS-IN
STUDIO ST-SPK
CTR-INS-OUTCTR-INS-IN
MIX-OUT
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module. This connector is only functional, is the TBO talkback mo-
dule is installed.
2-TR/9-12, 2-TR/13-16, 2TR/17-20, and 2-TR/21-24
The inputs of the additional monitor source selectors, installed in
the optional TBO talkback module and the optional STU playback
module.
6-TR/2-TR-A, 6-TR/2-TR-B
The inputs of the monitor source selectors in the mandatory CT5
surround control room module
CTR-INS-IN & CTR-INS-OUT
Surround insert outputs of the CT5 monitor module. Allows instal-
lation of bass-management systems, x-curve lters, etc., and the
outputs of the aux masters 3 & 4
MIX-INS-IN & MIX-INS-OUT
Pre fader surround master insert inputs and outputs and outputs
of the stereo cue send and aux-masters 1 & 2
STUDIO
Playback outputs for studio speakers and headphones. Only func-
tional ist the optional STU playback module is installed.
ST-SPK
Stereo speaker outputs for the alternate and mini speakers of the
CT5 control room module.
SRD-SPK
Outputs of the main surround speakers of the CT5 control room
module.
MIX-OUT
Surround master outputs and stereo matrix outputs of the MS5
surround master module.
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ba
1
2
3
4
5
6
7
8
9
10
11
12
13
GND
SRC51
POWER-IN
2TR/21-24
2TR/17-20
TB-CTRL
TB-AUDIO
2TR/13-16 6TR/2TR-B
USER-SWIITCH
2TR/9-12 6TR/2TR-A
SRD-SPK
MIX-INS-IN
STUDIO ST-SPK
CTR-INS-OUTCTR-INS-IN
MIX-OUT
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MIX OUT L
SubD-25 Connector
Female in Console Frame
MIX OUTPUTS
MIX OUT R
MIX OUT SL
MIX OUT SR
MIX OUT C
MIX OUT LFE
MIX OUT STEREO DOWNMIX L
MIX OUT STEREO DOWNMIX R
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2
3
4
5
6
9
10
11
12
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16
17
18
19
20
21
22
23
24
25
+
-
Screen
+
-
Screen
+
-
Screen
+
-
Screen
+
-
Screen
+
-
Screen
+
-
Screen
+
-
Screen
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CUE MASTER OUT R
SubD-25 Connector
Female in Console Frame
THIS CONNECTOR IS INSTALLED IN CONSOLES WITH AND
WITHOUT PATCH-BAY. WITH PATCH-BAY IT IS CONNECTED
DIRECTLY TO THE INSERT OUTPUT OF THE MASTER MODULE
MIX-INSERT OUT / CUE OUT
CUE MASTER OUT L
MIX INSERT OUT L
MIX INSERT OUT R
MIX INSERT OUT SL
MIX INSERT OUT SR
MIX INSERT OUT C
MIX INSERT OUT LFE
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7
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2
3
4
5
6
9
10
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12
13
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16
17
18
19
20
21
22
23
24
25
+
-
Screen
+
-
Screen
+
-
Screen
+
-
Screen
+
-
Screen
+
-
Screen
+
-
Screen
+
-
Screen
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AUX 1 MASTER OUT
SubD-25 Connector
Female in Console Frame
MIX-INSERT IN / AUX 1 & 2 OUT
AUX 2 MASTER OUT
MIX INSERT IN L
MIX INSERT IN R
MIX INSERT IN SL
MIX INSERT IN SR
MIX INSERT IN C
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MIX INSERT IN LFE
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7
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2
3
4
5
6
9
10
11
12
13
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15
16
17
18
19
20
21
22
23
24
25
+
-
Screen
+
-
Screen
+
-
Screen
+
-
Screen
+
-
Screen
+
-
Screen
+
-
Screen
+
-
Screen
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Pinnings of the Master Connectors
Mix Outputs
This connector holds the main master outputs of
the MS5 surround master module. If the console
operates in surround mode, all outputs are ac-
tive. With stereo mode, the outputs SL, SR, C,
and LFE are muted and the outputs L und R are
used as outputs for the stereo master.
The outputs of the stereo downmix matrix in
the MS5 master module are always active. If the
console is in surround mode, the stereo down-
mix signal contains a stereo version of the sur-
round master that is determined by the matrix
setting of the MS5 module. With stereo mode,
the downmix outputs are identical to the MIX-
OUT-L and MIX-OUT-R signals.
Mix-Insert Out / Cue Out
This connector holds the pre fader insert out-
puts of the MS5 surround master module. The
insert outputs are always active, independent of
the position of the insert switch in the module.
In surround mode, all outputs are active. In ste-
reo mode, only the L and R outputs are functio-
nal. All other outputs are muted.
In addition this connector holds the master out-
puts of the stereo cue-send.
Mix-Insert In / Aux 1 & Aux 2 Out.
The mix insert inputs of the MS5 surround ma-
ster module are activated by the insert switch in
the MS5 master module. In surround mode, all
inputs are used, while in stereo mode, only the
left and right inputs are active.
In addition, this connector holds the master ou-
tputs of the auxiliary sends 1 & 2.

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CTR-Insert Out / Aux 3 & 4 Out
The CTR-Insert can be used to add special func-
tions, like bass-management or x-curve lters
to the control room monitor chain, using exter-
nal gear. The insert is located between the out-
put of the control room source selector and the
input of the regulator section. The insert point is
fully balanced and operates on nominal level with
a headroom of + 30 dBu. The outputs are always
available, independent of the position of the in-
sert switch in the CT5 control room module.
In addition, this connector contains the outputs of
the auxiliary masters Aux 3 and Aux 4.
CTR-Insert In / 2-Track C Repro
The CTR-Insert Inputs are corresponding to the
CTR-Insert outputs. These inputs are activated
when the insert switch in the CT5 control room
module is pressed.
The CTR-Insert is not affected by the console‘s
operation modes ‚Surround‘ and ‚Stereo‘; howe-
ver, in stereo mode, SL, SR, C, and LFE will not
be used.
In addition, this connector contains the inputs of
the 3rd 2-Track-Input ‚C‘ of the control room mo-
nitor selector.
CTR-Surround Speaker Out
These are the outputs for the main control room
surround speaker system that is active unless
either Alternate or Mini is selected in the CT5
control room module.
The outputs for the Alternate and Mini Speakers
are available on the connector CTR-Stereo-Spea-
ker Out - see the next page for details. CTR-
Surround Speaker Out
These are the outputs for the main control room
surround speaker system that is active unless
either Alternate or Mini is selected in the CT5
module. See the next page for details.
AUX 3 MASTER OUT
SubD-25 Connector
Female in Console Frame
THIS CONNECTOR IS INSTALLED IN CONSOLES WITH AND
WITHOUT PATCH-BAY. WITH PATCH-BAY IT IS CONNECTED
DIRECTLY TO THE INSERT OUTPUT OF THE CTR MODULE
CTR-INSERT OUT / AUX 3 & 4 OUT
AUX 4 MASTER OUT
CTR INSERT OUT L
CTR INSERT OUT R
CTR INSERT OUT SL
CTR INSERT OUT SR
CTR INSERT OUT C
CTR INSERT OUT LFE
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17
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19
20
21
22
23
24
25
+
-
Screen
+
-
Screen
+
-
Screen
+
-
Screen
+
-
Screen
+
-
Screen
+
-
Screen
+
-
Screen
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2-TRACK C REPRO L FOR CTR-SELECT
SubD-25 Connector
Female in Console Frame
CONTROL ROOM INSERT IN &
2-TRACK C REPRO
2-TRACK C REPRO R FOR CTR-SELECT
CTR INSERT IN L
CTR INSERT IN R
CTR INSERT IN SL
CTR INSERT IN SR
CTR INSERT IN C
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CTR INSERT IN LFE
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25
+
-
Screen
+
-
Screen
+
-
Screen
+
-
Screen
+
-
Screen
+
-
Screen
+
-
Screen
+
-
Screen
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CTR MAIN SPEAKER OUT L
SubD-25 Connector
Female in Console Frame
CTR-SURROUND SPEAKER OUT
CTR MAIN SPEAKER OUT R
CTR MAIN SPEAKER OUT SL
CTR MAIN SPEAKER OUT SR
CTR MAIN SPEAKER OUT C
CTR MAIN SPEAKER OUT LFE
not used
not used
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25
+
-
Screen
+
-
Screen
+
-
Screen
+
-
Screen
+
-
Screen
+
-
Screen
+
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Screen
+
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CTR Stereo Speaker Out
These are the outputs of the stereo control room
speakers ‚Alternate‘ and ‚Mini‘. If the console is in
surround operation mode, these outputs are fed
by the stereo downmix matrix in the CT5 control
room module. Both, alternate and mini outputs
are electronically balanced.
In addition, this connector holds the direct ouput
of the console‘s stereo PFL system. These out-
puts can be used for an external PFL-Speaker sy-
stem.
6-Track/2-Track A Repro
This connector holds the control room selector
inputs for the surround 6-track recorder outputs
A and the 2 track recorder output A. All inputs
are balanced.
Please note that the 2-Track A inputs are used
for the selection of the extension selector in the
optional STU module, if this module is installed.
In this case, the 2-Track A L & R holds the output
of this selector. See the connectors 2-TR 9-12
and 2TR 13-16 on the next page for details.
PFL MASTER OUT L
SubD-25 Connector
Female in Console Frame
CTR-STEREO SPEAKER OUT
PFL MASTER OUT R
ALTERNATE SPEAKER OUT L
ALTERNATE SPEAKER OUT R
MINI SPEAKER OUT L
MINI SPEAKER OUT R
not used
not used
51
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6-TRACK B REPRO L
SubD-25 Connector
Female in Console Frame
if TBO module is installed, the 2-TRACK B pins are connected to
the output of the extension selector in the TBO module.
DO NOT USE THESE PINS! Use one of the inputs of the
extension connector instead!
6-TRACK/2-TRACK B REPRO
6-TRACK B REPRO R
6-TRACK B REPRO SL
6-TRACK B REPRO SR
6-TRACK B REPRO C
6-TRACK B REPRO LFE
2-TRACK B REPRO L = TBO-SELECT OUT L
2-TRACK B REPRO R = TBO-SELECT OUT R
51
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6-TRACK A REPRO L
SubD-25 Connector
Female in Console Frame
if STU module is installed, the 2-TRACK A pins are connected to
the output of the extension selector in the STU module.
DO NOT USE THESE PINS! Use one of the inputs of the
extension connector instead!
6-TRACK/2-TRACK A REPRO
6-TRACK A REPRO R
6-TRACK A REPRO SL
6-TRACK A REPRO SR
6-TRACK A REPRO C
6-TRACK A REPRO LFE
2-TRACK A REPRO L = STU-SELECT OUT L
2-TRACK A REPRO R = STU-SELECT OUT R
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6-Track/2-Track B Repro
This connector holds the control room selector
inputs for the surround 6-track recorder outputs
B and the 2 track recorder output B. All inputs
are balanced.
Please note that the 2-Track B inputs are used
for the selection of the extension selector in the
optional TBO module, if this module is installed.
In this case, the 2-Track B L & R holds the output
of this selector. See the connectors 2-TR 17-20
and 2TR 21-24 on the next page for details.

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2-Track 9-12 Repro
The optional STU playback module contains a
source selector with 8 balanced stereo inputs.
If this module is installed, the connector 2-Track
9-12 repro feeds the rst 4 stereo inputs of this
selector block.
The output of this selector feeds the 2-TR-A input
of the main control room selector in the CT5 sur-
round master module.
2-Track 13-16 Repro
The optional STU playback module contains a
source selector with 8 balanced stereo inputs.
If this module is installed, the connector 2-Track
13-16 repro feeds the second 4 stereo inputs of
this selector block.
The output of this selector feeds the 2-TR-A input
of the main control room selector in the CT5 sur-
round master module.
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12
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21
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24
25
+
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+
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+
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+
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+
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+
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+
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2-TRACK 12 REPRO R
SubD-25 Connector
Female in Console Frame
THIS CONNECTOR IS ALWAYS INSTALLED
BUT REQUIRES THE STU MODULE TO BE FUNCTIONAL!
(INPUTS OF EXTENSION SELECTOR IN STU MODULE)
2-TRACK 9 - 12 REPRO
2-TRACK 12 REPRO L
2-TRACK 11 REPRO R
2-TRACK 11 REPRO L
2-TRACK 10 REPRO R
2-TRACK 10 REPRO L
2-TRACK 9 REPRO R
2-TRACK 9 REPRO L
51
SRC
2-TRACK 20 REPRO R
SubD-25 Connector
Female in Console Frame
THIS CONNECTOR IS ALWAYS INSTALLED
BUT REQUIRES THE TBO MODULE TO BE FUNCTIONAL!
(INPUTS OF EXTENSION SELECTOR IN TBO MODULE)
2-TRACK 17 - 20 REPRO
2-TRACK 20 REPRO L
2-TRACK 19 REPRO R
2-TRACK 19 REPRO L
2-TRACK 18 REPRO R
2-TRACK 18 REPRO L
2-TRACK 17 REPRO R
2-TRACK 17 REPRO L
51
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25
+
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+
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+
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+
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+
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+
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+
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+
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2-TRACK 16 REPRO R
SubD-25 Connector
Female in Console Frame
THIS CONNECTOR IS ALWAYS INSTALLED
BUT REQUIRES THE STU MODULE TO BE FUNCTIONAL!
(INPUTS OF EXTENSION SELECTOR IN STU MODULE)
2-TRACK 13 - 16 REPRO
2-TRACK 16 REPRO L
2-TRACK 15 REPRO R
2-TRACK 15 REPRO L
2-TRACK 14 REPRO R
2-TRACK 14 REPRO L
2-TRACK 13 REPRO R
2-TRACK 13 REPRO L
51
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2-Track 9-12 Repro
The optional TBO talkback module contains a
source selector with 8 balanced stereo inputs.
If this module is installed, the connector 2-Track
17-20 repro feeds the rst 4 stereo inputs of this
selector block.
The output of this selector feeds the 2-TR-B input
of the main control room selector in the CT5 sur-
round master module.

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2-Track 21-24 Repro
The optional TBO talkback module contains a
source selector with 8 balanced stereo inputs. If
this module is installed, the connector 2-Track 21-
24 repro feeds the second 4 stereo inputs of this
selector block.
The output of this selector feeds the 2-TR-B input
of the main control room selector in the CT5 sur-
round master module.
Studio Phones & Speakers
This connector is used for the outputs of the op-
tional STU studio playback module. If this modu-
le is not installed, these outputs are not active.
The studio speaker outputs are standard balan-
ced outputs at nominal level, while the studio
phones output 1 to 3 are the outputs of head-
phone ampliers in the STU module. Please no-
te that these outputs are used for the direct con-
nection to headphones. They are unbalanced and
use a non-standard pinning.
2-TRACK 24 REPRO R
SubD-25 Connector
Female in Console Frame
THIS CONNECTOR IS ALWAYS INSTALLED
BUT REQUIRES THE TBO MODULE TO BE FUNCTIONAL!
(INPUTS OF EXTENSION SELECTOR IN TBO MODULE)
2-TRACK 21 - 24 REPRO
2-TRACK 24 REPRO L
2-TRACK 23 REPRO R
2-TRACK 23 REPRO L
2-TRACK 22 REPRO R
2-TRACK 22 REPRO L
2-TRACK 21 REPRO R
2-TRACK 21 REPRO L
51
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25
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+
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+
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+
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+
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+
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+
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+
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OSCILLATOR DIRECT OUTPUT
SubD-25 Connector
Female in Console Frame
OSCILLATOR SWITCHED OUTPUT
EXTERNAL LISTEN-LINE-INPUT
LISTEN OUTPUT
EXTERNAL LISTEN MIC INPUT
EXTERNAL TB MIC INPUT
EXTERNAL TALKBACK OUTPUT 1
EXTERNAL TALKBACK OUTPUT 2
THIS CONNECTOR IS ALWAYS INSTALLED BUT
REQUIRES THE TBO MODULE TO BE FUNCTIONAL
TALKBACK AUDIO
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STUDIO SPEAKER OUTPUT RIGHT
SubD-25 Connector
Female in Console Frame
STUDIO SPEAKER OUTPUT LEFT
STUDIO PHONES 1 OUTPUT RIGHT
STUDIO PHONES 1 OUTPUT LEFT
STUDIO PHONES 2 OUTPUT RIGHT
STUDIO PHONES 2 OUTPUT LEFT
STUDIO PHONES 3 OUTPUT RIGHT
STUDIO PHONES 3 OUTPUT LEFT
THIS CONNECTOR IS ALWAYS INSTALLED BUT
REQUIRES THE STU MODULE TO BE FUNCTIONAL
STUDIO PHONES & SPEAKERS
51
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Talkback Audio
This connector is used for the audio inputs and
outputs of the optional TBO talkbak module. If
this module is not installed, these outputs are
not active.
The external Talkback outputs 1 and 2 are
switched by the corresponding talkback switches
in the TBO module. The external Talkback Mic
Input can be used for an additional talkback mi-
crophone or a line-level signal. The input is an
electronically balanced zero-ohm input. With no
external resistors, a 200 ohms microphone can

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51
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Talkback Control
This connector is used for the control inputs and
outputs of the optional TBO talkbak module. If this
module is not installed, these outputs are not active.
The control inputs are isolated by optocouplers. Di-
ode bridges and resistor in the input circuit make
possible to use any voltage between approx. 9 volts
and 30 volts of any polarity. If ony 5 volt control si-
gnals are available, it is possible to change the resi-
stors on the pcb.
A 24 volts output for the supply of external relais
and lamps is available on this connector. The power
output is protected by a self-resetting fuse. The ma-
ximum output current is 200 mA.
Do not connect the ‚Relais-Ground‘ on this connector
to other grounds of the studio to maintain a clean
grounding system. Use the 24 V output only for oa-
ting, ground-free circuits.
External Listen Mic Ctrl In
This optocoupler input activates the external listen mic input. Alternatively, the external listen mic
can be activated by a switch on the face plates of the TBO module.
External Listen Line Ctrl Input
This optocoupler input activates the external listen line input. Alternatively, the external listen line
input can be activated by a switch on the face plates of the TBO module. If the autoselect trigger
circuit is active or not, is determined by jumpers.
External Talkback Mic Ctrl Input
This optocoupler input activates the external talkback mic input. Alternatively, the external talkback
mic can be activated by a switch on the face plates of the TBO module.
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EXTERNAL LISTEN MIC CTRL IN *1
EXTERNAL LISTEN LINE CTRL INPUT *1
EXTERNAL TALKBACK MIC CTRL INPUT *1
LISTEN CTRL OUTPUT *2
ON-AIR CTRL OUTPUT *2
DIM CTRL OUTPUT *2
TALKBACK CTRL OUTPUT *2
AUTODIM REMOTE CTRL INPUT *1
ON-AIR REMOTE CTRL INPUT *1
RELAIS-GROUND
ONLY CONNECT TO FLOATING CIRCUITS
+24V ACROSS 47R-1W MAX CURRENT: 50 mA
SubD-25 Connector
Male in Console Frame
*1: Optocoupler - 9...30V, R
IN
1.5k
*2:
Relais, floating, normally open, max. 50mA/30V
51
SRC
THIS CONNECTOR IS ALWAYS INSTALLED BUT
REQUIRES THE TBO MODULE TO BE FUNCTIONAL
TALKBACK CONTROL
be connected directly to the input. Adding to re-
sistors in series make possible to adapt the gain
to a line level signal. For 0 dB gain, 2 47 k-ohm
resistors are required. Since the input is a zero
ohms input, mixing of several signal with series
resistors is possible.
The external listen mic input uses the same
principle as the external talkback mic input. The
zero ohms input can be used for the direct con-
nection of the listen microphone. Adding resi-
stors, like explained above, makes possible to
use this input for one or more line level signals.
The external listen line input is a line level,
electronically balanced input. An auto-detect trig-
ger circuitry in the TBO modules can switch the
console into Listen mode when a signal is pre-
sent, if this function is enabled by the correspon-
ding switch in the TBO module.
The listen routing of the TBO modules makes
possible to feed the listen signal, that can be the
mix of an additional microphone in the studio and
external incoming talkback lines to the console‘s
PFL system. In addition, a balanced listen output
is available on this connector, if it is required to
use an additional external speaker for the listen
signal.
There are 2 outputs of the oscillator in the TBO
module. The Oscillator Direct Output is always
active when the oscillator is switched on. The
Oscillator Switched Output is controlled by an
additional switch in the TBO module.

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User Switch
There are 4 additional
switches in the optional
TBO talkback modu-
le that can be used for
additional functions.
Of course, this con-
nector is only in use if
the TBO module is in-
stalled.
In the standard versi-
on, switch 1 and 2 are
non-latching versions,
and switch 3 and 4 are
latching version. Feel
free to tell us with the
order any other con-
guration; however, later
changes from latching
to non-latching or vice
versa are not possible.
Each switch has a ‚normally open‘ and a ‚normally closed‘ contact and a
lamp socket. The contacts can be used with any dc voltage up to 30 volts
and up to a current of 50 mA. If not specied otherwise, 28 volts lamps,
40 mA will be installed.
The contacts and the lamp connections are oating.
Feel free to tell us which color the caps should have and if and how we
should engrave the caps.
The following inputs and
outputs can be exten-
sively congured by jum-
per settings to meet spe-
cial requirements. If you
need any special control
functions, please let us
know. These inputs and
outputs default to the fol-
lowing functions:
Listen Ctrl Output
Floating relay contact,
closed if listen is active
On-Air Ctrl Output
Floating relay contact,
normally not used, free
for custom functions.
Dim Ctrl Output
Floating relay contact,
closed if the Autodim bus
is active
Talkback Ctrl Output
Floating relay contact, closed if talkback is active
Autodim Remote Ctrl Input
Optocoupler input; activates the console‘s autodim control bus. This bus
can be used to dim the control room speakers, and dim or cut the studio
speakers. The particular conguration takes place by jumpers on the cor-
responding modules. The standard setting dims the control speakers from
this bus, that is also fed by the talkback system.
On-Air Remote Control Input
This optocoupler input is normally not used and free for custom functions.
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23
24
25
+
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+
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+
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+
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+
-
+
-
+
-
+
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+
-
+
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+
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EXTERNAL LISTEN MIC CTRL IN *1
EXTERNAL LISTEN LINE CTRL INPUT *1
EXTERNAL TALKBACK MIC CTRL INPUT *1
LISTEN CTRL OUTPUT *2
ON-AIR CTRL OUTPUT *2
DIM CTRL OUTPUT *2
TALKBACK CTRL OUTPUT *2
AUTODIM REMOTE CTRL INPUT *1
ON-AIR REMOTE CTRL INPUT *1
RELAIS-GROUND
ONLY CONNECT TO FLOATING CIRCUITS
+24V ACROSS 47R-1W MAX CURRENT: 50 mA
SubD-25 Connector
Male in Console Frame
*1: Optocoupler - 9...30V, R
IN
1.5k
*2:
Relais, floating, normally open, max. 50mA/30V
51
SRC
THIS CONNECTOR IS ALWAYS INSTALLED BUT
REQUIRES THE TBO MODULE TO BE FUNCTIONAL
TALKBACK CONTROL
THIS CONNECTOR IS ALWAYS INSTALLED BUT
TBO MODULE IS REQUIRED TO BE FUNCTIONAL
USER SWITCH
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17
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20
21
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25
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+
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SWITCH 4 - LAMP
SWITCH 4 - CONTACT - NORMALLY OPEN
SWITCH 4 - CONTACT - NORMALLY CLOSED
SWITCH 3 - LAMP
SWITCH 3 - CONTACT - NORMALLY OPEN
SWITCH 3 - CONTACT - NORMALLY CLOSED
SWITCH 2 - LAMP
SWITCH 2 - CONTACT - NORMALLY OPEN
SWITCH 2 - CONTACT - NORMALLY CLOSED
SWITCH 1 - LAMP
SWITCH 1 - CONTACT - NORMALLY OPEN
SWITCH 1 - CONTACT - NORMALLY CLOSED
SubD-25 Connector
Male in Console Frame
Switches: max. 50 mA / 30V
Lamps: 14V/100mA
or 28V/40mA or Led's
ALL DEVICES ARE FLOATING
51
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