DHY-03 User Handbook
9
C
ONFIGUR
A
TION & C
ONTR
OLS
Figure 2-1 : Front Panel Controls.
Power LED Indicator
The power LED indicates that the equipment is powered and operational when illuminated.
Line Connect Button
This is the front panel button used to connect calls to, and disconnect calls from, the
telephone line. The switch will illuminate to indicate the call has been connected. The line
connect button will flash when an incoming call is detected. Operation of this button can be
remotely controlled.
Gain Switches
These switches allow gain/attenuation to be applied to the incoming & outgoing analogue
audio. Each switch has 3 positions, rotating the switches clockwise give gains of -6dB, 0dB &
+6dB. The normal position for the transmit gain to the telephone line (lower switch) is 0db
and for the receive gain from telephone line (upper switch) is –6dB.
LED Bargraphs
These 8 position bargraphs, by default, indicate the signal levels of the incoming audio
signal (lower) and outgoing audio (upper). For best operation set the signal gain switches
to achieve all 3 yellow LEDs mostly illuminated with occasional audio peaks lighting the first
red LED. The default operation can be changed by setting the Meter Select parameter 7 via
the serial port.
The scale indicates from left to right – Green (-30dB, -18dB, -6dB); Yellow (-3dB, 0dB, +3dB);
& Red (+6dB, +9db).
CONFIGURATION & CONTROLS
2 Configuration & Controls - DHY-03, DHY-03S, DHY-03T
Front Panel Controls
Receive Gain
Switch
LED
Bargraphs
Power
LED
Indicator
Transmit Gain
Switch
Reset
Button
Line
Connect
Button
2