Sonifex HY02 DIGITAL, User Handbook Manual

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Page 1-6 Introduction & Installation
HY02 Digital TBU User's Guide
1.6.3. Line Connect Switch
This is the front panel button used to connect calls to and disconnect calls from the
telephone line. It can be remoted by using the Remote Divert switch and the connection signal can be
made permanent or momentary by adjusting jumper setting JP1.
1.6.4. Transmit and Receive Level Adjustment
To the left of the LED bar graph meters are two holes which can be used to adjust the
level of the transmitted and received signals. Inside the holes are a three way switch which can be
adjusted by use of a small flat-blade screw-driver :
1.6.4.1 Receive Level
The level of the input received by the unit depends on
which of the three settings is selected. With the switch set to low, a -12dB
signal received is output at 0dB. Selecting the Medium or High settings add
+6dB and +12dB to the level respectively. Set the level so that the meter
readings peak at the 0dB scale mark.
The receive switch is set to Low by default.
1.6.4.2 Transmit Level
The level of the output sent by the unit depends on which
of the three settings is selected. With the switch set to low, -12dB is sent to
the line for a reference 0dB input signal. For the Medium and High settings,
-6dB and 0db respectively are sent to the line ( i.e. +6dB increase in level
each time ). Use the Low setting for high level input ( where the LED bar
graph is always going to the end of the meter ). Use the High setting for low
level input ( where the bar graph meter never reaches the 0dB point ).
The transmit switch is set to Medium by default.
Setting Receive Level
( ref 0dB output )
Transmit Level
( ref 0db input )
High +12dB 0dB
6dB -6dB
Low 0dB -12dB