Sonifex HY-03, User Handbook Manual

Configuration & Controls 

8 

Sonifex HY-03 User Handbook  

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.  

Note : The noise gate threshold is factory set for optimum performance, so will not normally need adjustment. 

Important Note : There are a number of other controls which are factory set, or should only be used when 

testing/aligning the product. These are RV2, RV5, RV6, RV7 and jumpers JP2 and JP3. Please note that these 

controls should not be adjusted in normal operation and could damage the performance of your product if 

altered. Adjusting these settings will invalidate the warranty on your product. 

Using the Dial Tone Disconnect Option 

The optional HY-03DTD Dial Tone Disconnect PCB allows the HY-03 to drop a call automatically when the pre-configured 

tones are detected.  

To use Dial Tone Disconnect, SW1 on the rear panel must be set to on, and the 

appropriate jumper(s) JP1-JP16 on the Dial Tone Disconnect PCB must be fitted 

to enable detection of the required tone(s). For example, to enable the HY-03 to 

detect the dial tone in Finland, set the rear panel SW1 to ON and set the jumpers 

on the HY-03DTD board over JP1, JP2 and JP3. 

If the HY-03DTD board has been supplied for you to upgrade your HY-03, fit the 

correct jumpers on the board as below, follow the instructions on page 7 for 

opening the unit and plug it in, as per Figure 2-4. Make sure that there is a 

secure and firm connection between the plug-in headers, and fit the supplied 

threaded M3 x 12mm pillar between the two boards using the supplied M3 x 6mm 

pan head posidrive screws (one bottom and one top). Replace the HY-03 main 

board into the HY-03 chassis. 

Figure 2-5 : Jumper settings

        on the HY-03DTD board 

See Table 2-1 below for a list of the tones currently implemented. 

Country Frequencies 

Type 

Details 

Jumper(s) 

set on JP… 

Austria 440Hz 

Continuous 

- 

1 

Belgium 450Hz 

Continuous 

- 

2 

Bulgaria 

425Hz 

Cadence 

250ms on, 750ms pause, 750ms 

on, 1000ms pause 

1 + 2 

Cyprus 

350Hz and 450Hz 

Continuous 

- 

3 

Czech Republic 

425Hz 

Continuous 

- 

1 + 3 

Denmark 

425Hz 

Continuous 

- 

2 + 3  

Finland 

425Hz 

Continuous 

- 

1 + 2 + 3 

France 440Hz  Continuous 

- 

4 

Germany 

425Hz 

Continuous 

1 + 4 

Greece 

440Hz 

Continuous 

2 + 4 

Hungary 

440Hz 

Continuous 

1 + 2 + 4 

Iceland 

425Hz 

Continuous 

3 + 4 

Ireland 

400Hz and 450Hz 

Continuous 

1 + 3 + 4 

Israel 

400Hz 

Continuous 

1 + 4 + 5 

Italy 

425Hz 

Cadence 

200ms on, 200ms pause, 600ms 

on, 1000ms pause 

2 + 3 + 4 

Japan 

400Hz 

Continuous 

2 + 4 + 5 

Luxembourg 

425Hz 

Continuous 

1 + 2 + 3 + 4 

Netherlands 450Hz 

Continuous 

5 

Norway 

425Hz 

Continuous 

1 + 5 

Poland 

425Hz 

Continuous 

2 + 5 

Portugal 

425Hz 

Continuous 

1 + 2 + 5 

South Korea 

350Hz and 440Hz 

Continuous 

1 + 2 + 4 + 5 

Spain 

425Hz 

Continuous 

3 + 5 

Sweden 

425Hz 

Continuous 

1 + 3 + 5 

Switzerland 

425Hz 

Continuous 

2 + 3 + 5 

Taiwan 

350Hz and 440Hz 

Continuous 

3 + 4 + 5 

United Kingdom 

350Hz and 440Hz 

Continuous & Cadence 

750ms on, 750ms pause 

1 + 2 + 3 + 5 

United States 

440Hz and 480Hz 

Continuous 

4 + 5 

Table 2-1 : Supported Dial Tone Details 

The unit can be programmed with other settings, so please contact us if you need the settings for a different country to be 

implemented. In this case, it would be useful to have an audio recording of the dial-tone and a specification of the dial 

tone parameters. 

Plug-in
Header

Mounting screw

on a pillar

JP1

JP16