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 conguration. This conguration determines which routing bus
is connected to a particular module slot. If not otherwise specied, 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 ampliers. There are also a couple of conguration
options for custom modications 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
