Specifications

10
HY-03 User Handbook
CONFIGURATION & CONTROLS
CONFIGURATION & CONTROLS
2
HY-03 Internal Controls & Adjustments
See page v for information on opening the HY-03
Figure 2-4 : HY-03 Preset Controls and Alignments
Setting the Number of Rings for The Ringing Detector
To alter the number of rings that occur before the ringing detector auto answers the call,
use a jeweller’s screwdriver to adjust RV8. The equipment is factory set for 3 rings, but this
can be adjusted between 1 and 6 rings.
Note : The number of rings above are for UK ring tones and may vary for non-UK
telephone exchanges.
Switching the Noise Gate On/O
An output noise gate operates when the telephone signal is below the noise gate threshold
control. This noise gate reduces the output gain by 34dB under no signal conditions
eliminating the aects of telephone line cross talk. The noise gate can be switched o if you
don’t wish to use it by adding JP1 on the main circuit board.
JP1 ON – Noise Gate O
JP1 OFF – Noise Gate On
Adjusting the Noise Gate Threshold
The noise gate is factory set to –26dBu to avoid interaction with the equipment null. To
adjust the noise gate threshold, use a jeweller’s screwdriver to adjust RV4 on the main HY-03
circuit board.
Mic Gain
Limit Level
Noise Gate
Disable
Res Auto
Disable
Line
Reverse
K-Break
Cap Auto
Disable
Noise Gate
Threshold
Optional
HY-03DTD
Board
On units serial number
HY000323 upwards
Plug-in
Header
Mounting screw
on a pillar
Output
Level
Sample
Threshold
Rings
Res Set
Cap Set
RV4
RV7
RV2
JP1
JP4
JP5
JP1JP16
JP2 JP3
RV6
RV5
RV8
RV3 RV1