Lectrosonics duet DCHT, Instruction Manual

Page: 16 / 24

DCHT, DCHT/E01
LECTROSONICS, INC.
16
Input Connections
Lavalier microphones and adapter cabling used with digi-
tal body pack transmitters should have the shield wire
connected to the shell of the microphone plug.
This will reduce the RF energy radiated into the micro-
phone cable shield wire from getting back into the trans-
mitter via the audio input.
Digital RF carriers contain both FM and AM components
and greater microphone shielding is required to over-
come induced transmitter radio frequency interference.
The 6-pin input jack accommodates two discrete chan-
nels at microphone or line levels. The input connections
are configured as follows:
ANALOG DIGITAL
Pin 1 CH 1 Shield/Gnd AES GND
Pin 2 CH 1 Mic level
Pin 3 CH 1 Line level
Pin 4 CH 2 Mic level AES CH 1
Pin 5 CH 2 Shield/Gnd AES CH 2
Pin 6 CH 2 Line level
1
2
3
4
5
6
TA6FLX connector
viewed from outside
Refer to the Accessories section of this manual for de-
tails on the available adapter cables.
The mating connector for the DCHT, DCHT/E01 input
jack is a Switchcraft TA6FLX 6-pin female (nickel plated).
Lectrosonics P/N 21932.
NOTICE: Any microphone wired using pin 2 for elec-
tret bias will NOT work with the DCHT, DCHT/E01 and
MCTA6TA5M2 adapter. For example, see figures 1 and 2
(below) for servobias inputs that will not operate properly.
1
2
3
4
5
PIN
SHIELD
AUDIO
1
2
3
4
5
TA5F
PLUG
2.7 k
2 VOLT NEGATIVE BIAS 2-WIRE ELECTRET
Compatible wiring for microphones
such as negative bias TRAM models.
NOTE: The resistor value can range from 2k to 4k ohms.
Fig. 2
Fig. 1
1
2
3
4
5
PIN
SHIELD
A UDI O
1
2 3
4
5
T A5 F
PLUG
3.3 k
1.5 k
2 VOLT POSITIVE BIAS 2-WIRE ELECTRET
Compatible wiring for microphones such as
Countryman E6 headworn and B6 lavaliere.
Also see Fig. 9
NOTE: The Sanken CUB-01 is wired using pin
2 for the bias and will not work with the DCHT,
DCHT/E01 and MCTA6TA5M2 adapter.
AES IEC Type 1 and 2 Wiring (TA6F to XLRF)
Type 1 interface : Type I connections use balanced,
3-conductor, 110-ohm twisted pair cabling with XLR con-
nectors. Most often used in professional installations and
are considered the standard connector for AES3. Wire as
shown.
Type 2 interface : A 75-ohm unbalanced electrical or op-
tical interface for consumer electronics applications (less
common). Connect pin 4 to the center pin of the connec-
tor. Connect pin 5 to the connector shell. Shield (pin 1 of
the TA6) is unused.