Inter-m PAM-240A Operation Manual page 9

5. PHANTOM POWER SWITCH
This switch turns the phantom power supply on or off for all channels. When the switch is turned on, +24V
DC power is supplied to pins 2 and 3 of each channel's input connector.
Use phantom power when connecting condenser microphones, which require an external power supply.
NOTE: It is safe to connect most modern dynamic microphones or line level devices to the channel inputs
when phantom power is activated. However, some older ribbon microphones may be damaged by
phantom power, and certain unbalanced line level devices may malfunction or produce an audible
hum when phantom power is active.
6. PRIORITY SWITCH
When selected, these switches will give priority to Channels 1 and/or 2 over all other channels and audio inputs.
7. EM
When EM switch is connected and pressed in fire or other emergencies, EM broadcasting stored in VOICE IC
is outputted.
* Remove an input jack from AMP IN not to affect Emergency signal to be played or adjust the main audio
signal to adequate level for emergency broadcasting.
8. EXT CHIME
When these two terminals are shorted by wired remote (see item 14 above), the four-tone chime circuitry is
activated.
9. EXT MUTE
When these two terminals are shorted by wired remote (see item 14 above), signals from Input Channels 3-6
and any optional modules are muted. Signals from Channel 1, Channel 2, Link In and Chime are not muted.
10. AC POWER INPUT
Connect a standard three-pin AC cable to this connector.
11. TELEPHONE INPUT TERMINALS
These terminals can be connected to a telephone exchange system for paging purposes.
NOTE: When an active signal is sent through the telephone input, all other input signals except for AMP IN
are muted.
12. MUSIC-ON-HOLD TERMINALS (PAM-T AM/FM TUNER MODULE ONLY)
These terminals, along with the Telephone Input Terminals (11), are used for connecting with an external
telephone system. When used with the optional PAM-T module, these terminals supply music-on-hold to the
telephone system.
NOTE: When the tuner is turned on, signal from the tuner is constantly sent to these terminals, and is
unaffected by the Master Volume or the PAM-T's volume control.
PUBLIC ADDRESS AMPLIFIER
7
PAM-240A/360A