Broadcast Warehouse TX 150/300, Техническое руководство, Страница: 16 / 41

TX FM Transmitter technical manual
page 16
Installation and setup
jumper 12, the ‘bridge’ link (see below). This jumper does not affect the mono/stereo status of externally-
coded MPX inputs (J1 off).
Jumper 12: Mono bridge
The default position is OFF.
When the board is operating in mono, the bridge should be set to ON. This ensures that when the board is
operating in mono, no stereo information is broadcast, and that a mono drive to either left or right inputs, or
a stereo input applied simultaneously to L and R inputs, will produce proper summed mono operation and no
spurious 38KHz signals.
Modes of operation
Multiplex / broadband input.
The Internal stereo encoder and audio limiter are not used. Wideband modulation is fed into the rear panel
BNC multiplex input socket. Allows external processors, encoders and rebroadcast receivers to be plugged
straight into the transmitter.
JUMPERS. J1 (OFF), J2-12 (N/A)
Stereo with internal limiter. ( factory setting )
Left and Right audio are fed to the back panel balanced inputs and are pre-emphasized, peak limited, fil-
tered and then fed to the internal stereo encoder for multiplex generation. The multiplex signal is then fed
through to the exciter module and to the back panel multiplex output BNC socket. See loopthrough mode
below *
JUMPERS. J1 (ON), J2-3 (50 or 75), J4-5 (LOUD or CLARITY), J6-7 (ON), J8 (ON), J9-10 (ON), J11 (ST),
J12 (OFF)
Stereo with internal limiter disabled.
As the above stereo with limiter mode except the limiter section is disabled. This mode can be used when
you want an external limiter / processor to provide all the peak limiting and protection. Clippers at the out-
put of the limiter module can be left in or out subject to your requirements. See loopthrough below *
JUMPERS. J1 (ON), J2-3 (0 or 50 or 75), J4-5 (LOUD or CLARITY), J6-7 (ON or OFF), J8 (OFF), J9-10
(ON or OFF), J11 (ST), J12 (OFF)
Mono from two independent channels.
Essentially the same as the stereo with limiter mode except the stereo pilot is disabled which will enable
receivers to receive you in mono. See loopthrough mode below *
JUMPERS. J1 (ON), J2-3 (50 or 75), J4-5 (LOUD or CLARITY), J6-7 (ON), J8 (ON), J9-10 (ON), J11 (MO),
J12 (OFF)
Mono from one channel input.
You can provide one audio feed to the transmitter via the left balanced input. Setting the internal bridge
jumper J12 to ON will join the left and right audio signals internally to maintain the same volume from the
transmitter and forces the stereo encoder section to replicate true mono. See loopthrough mode below *
JUMPERS. J1 (ON), J2-3 (50 or 75), J4-5 (LOUD or CLARITY), J6-7 (ON), J8 (ON), J9-10 (ON), J11 (MO),
J12 (ON)
Other configurations