Installation Guide; General Installation Rules; Standard Portable Units; Flush Mounted Units - DIS CDS 4000 User Manual & Installation Manual

CDS 4000

Installation guide

The microphone units comes in two versions:
P=Portable and F=Flush mounted. The flush
mounted units are used for permanent fixed
installations. It is possible to combine both versions
in the same set-up.
The differences of the F-type versus the P-type are:
•
The flush mounted units (F-type) have a bottom
profile (C-profile), which is mounted in a hole
cut out in the table top. This profile is deep,
allowing room for the cables under the
electronic top part of the unit.

General installation rules

Standard portable units

Standard microphones DM/CM40xx, DM/CM44xx
and LS4000:
•
Always use DIS-type extension cable (special
product cable) to obtain full performance of the
system. Only DIS-type cable can be used.
•
The maximum cable length between any two
units connected together is 100 m.
•
The total cable length in one chain must not
exceed 200 m (which includes the 2 m cable on
each portable unit).
•
The units in each chain must be connected one
after the other (daisy chain), i.e. it is not
allowed to make star point configuration.
•
Always switch off the main power on the
central unit before removing or adding units to
the chain. Omission to do this might damage
the connectors.
•
Keep the length of all cables as short as
possible to maintain high audio quality and low
noise operation.
Manual no. 4479, Printed in Denmark, 02/03
•
The F-type is daisy chained by a flat ribbon
cable with 26-pin connectors used instead of
the special DIS round cables with D15-
connectors used for the P-type. Female 26-pin
connectors are used in both ends of the ribbon
cables. The microphone units have two 26-pin
male connectors in the bottom of the electronic
PCB.
Two types of cable converters can be used to
change from round cable to ribbon cable and vice
versa.
•
Avoid having a cable connected to the system,
when there is not a unit (DM4xxx or CM4xxx)
connected in the other end. The open cable
with no termination might cause problems for
the data transmission and pick up audio noise.
If one or more LS4000 units are connected last
in a chain, the DATA IN and DATA OUT
signals should be cut in the DM/CM connector
of the last microphone unit. (D15 female: Pin 5
and 13. 26-pin Molex: Pin 8A and 10A.)
The total cable length of a chain can be extended to
up to 300 m, but this might cause a slight drop in
audio performance: A slight raise in cross talk from
data-signals and possibility for clipping of very
high audio due to drop in power supply voltage.

Flush Mounted Units

It is very important, that the C-profiles are installed
correctly to assure perfect function of the profile
locking system:
•
The hole in the table must have the correct
measurements. See drawing 3.9-25 in the
appendix.
•
The C-profile must be placed correctly with the
front against the user/delegate. If turned, the
INSTALLATION GUIDE
34