GENERAL PURPOSE BROADCAST
EXPANSION FUNCTIONS
Quasi-Dual-Origination
Broadcast Connection
4
-5-
6
Quasi-dual-origination broadcasts can be performed by the following system.
[Connection]
Change the connection of the CN-1003 connector on the VM amplifier's RY circuit board from [2P-3P Short]
position to the [1P-2P Short] position. Connect the BGM amplifier speaker output to the VM amplifier's External
Speaker input.
[VM Amplifier's Internal Operation]
When the VM amplifier's zone selector switch is set to the OFF position, the zone selector switch relay switches
to the External SP input side. If the zones (Zones 2 and 3 in the figure) are selected from the Remote Microphone
and a broadcast is started, the VM amplifier's zone selector switch relay contact switches to the amplifier side.
NOTE:
Zone attenuators cannot be used and signals cannot be muted for external BGM signals. Whether or not to distribute external BGM
cannot be selected. If the zones not receiving the BGM are fixed, modify the RY circuit board. (If modified, BGM broadcast status
cannot be checked from the indication.)
A-1000Series
OT
Level meter
CN1003
1
Power Amp.
Zone vol.
VM-2120/2240
BGM Source
Amplifier etc.
50/70/100V
Paging signal
BGM signal
N1
C
N2
ZONE-5
ZONE-4
ZONE-3
ZONE-2
ZONE-1
