4
DHY-03 User Handbook
Connecting the DHY-03 TBU
Connect the earth and mains power connections as per the information given in the
Warranty and Safety Information sections of the handbook. The hybrid unit should be
connected with reference to
Figure 1-5.
The telephone line socket is connected to the telephone network using the RJ11 to RJ11
cable provided. An adaptor is provided to connect to a standard BT socket.
A simple telephone handset can be used to take and make calls when plugged into the
equipment handset connector. An adapter is provided if the handset is fitted with a BT plug
as standard.
A remote switch may be connected at the Remotes socket in order to control the line
connect button from say, the telco channel of a mixing desk.
Connect the output from the mixing desk “clean-feed” to the mic/line input of the DHY-03,
with the mic/line input select switch set to “line”. A clean-feed is a signal produced by a telco
module on a mixer which is used as the output to be fed back to a caller on a telephone
line. The cleanfeed is a sum of all the other signals which constitute the programme output,
except for the caller’s audio (this is so that the caller doesn’t hear him/herself in the
ear-piece). A cleanfeed signal will generally be of a better quality than a mix-minus signal.
INTR
ODUC
TION
Figure 1-5 : DHY-03 User Connections.
INTRODUCTION
1
The characteristics of the mic/line input are determined by the state of the mic/line
configuration selection switch. It is a balanced bridging input and in line mode will accept
normal signals at 0dBu peaking to +8dBu from a sound mixer clean feed. In mic mode,
available on all units except DHY-03EC, the unit will accept 200 Ω microphone level signals
with a maximum gain of 74dB. It is suitable for a wide range of microphones and the
available gain is 74dB to 40dB, which can be adjusted by the mic level pre-set mounted