Telex MCE325 用户手册
2-5
NOTE
See Table 3.1for a summary of how the channel selector buttons work for the various
configurations. The MCE325 is typically supplied with a termination plug inserted into J10. This
plug terminates CH 3 and CH 4 with 200 ohms to prevent oscillation when these channels are not
used. When the channels are used, this termination plug should be removed.
configurations. The MCE325 is typically supplied with a termination plug inserted into J10. This
plug terminates CH 3 and CH 4 with 200 ohms to prevent oscillation when these channels are not
used. When the channels are used, this termination plug should be removed.
Front Panel Setup Mode Lock-out (DS4)
DIP switch DS4 may be set to lock out the front panel programming and prevent changes. Front
panel programming is described in Section 3, Operation.
panel programming is described in Section 3, Operation.
ISO (DS5)
The MCE325 may be used with an RTS Model VCP6A, VCP12A, or VCP12B Control Station to
permit private conversation between the MCE325 operator and a camera operator. When ISO
mode is engaged, either talk, or talk and listen (depending on the setting of DS5) for all other
channels connected to the MCE325 will be muted, and a private line will be established between
the MCE325 operator and the camera operator. See “ISO Connection” for wiring information.
permit private conversation between the MCE325 operator and a camera operator. When ISO
mode is engaged, either talk, or talk and listen (depending on the setting of DS5) for all other
channels connected to the MCE325 will be muted, and a private line will be established between
the MCE325 operator and the camera operator. See “ISO Connection” for wiring information.
Remote Talk-off (DS7)
The MCE325 is capable of generating and transmitting an inaudible, 24 kHz signal on an
intercom channel. This signal is used to turn off the microphones on any remote stations on the
channel (stations with remote talk-off feature only). This feature is useful when an unattended
user station with an activated microphone is introducing unnecessary noise into a line. DIP switch
DS7 enables/disables this feature. When remote talk off is enabled, the talk-off signal is activated
using the CALL button on the front panel. (for Operation see “Using the Talk-Off Feature”.)
intercom channel. This signal is used to turn off the microphones on any remote stations on the
channel (stations with remote talk-off feature only). This feature is useful when an unattended
user station with an activated microphone is introducing unnecessary noise into a line. DIP switch
DS7 enables/disables this feature. When remote talk off is enabled, the talk-off signal is activated
using the CALL button on the front panel. (for Operation see “Using the Talk-Off Feature”.)
VOX (DS8)
DIP switch DS8 turns the voice activated microphone circuit on or off. Voice activation can be
used with the panel microphone, a headset, or a remote microphone connected at the rear panel.
(There is no adjustment for VOX sensitivity.)
used with the panel microphone, a headset, or a remote microphone connected at the rear panel.
(There is no adjustment for VOX sensitivity.)
Table 2.3
Internal programming for the various intercom line configurations.
DIP SWITCHES
JUMPERS
DS1
DS2
DS3
J6
J7
J19
J20
Configuration 1: Two 2-wire lines (CH 1& CH 2). (Default configuration.)
Off
Off
Off
Pins 2 & 3 shorted Pins 2 & 3 shorted Pins 2 & 3 shorted Pins 2 & 3 shorted
Configuration 2: Three or four 2-wire lines (CH 1, CH 2, CH 3, CH 4).
Off
Off
On
Pins 2 & 3 shorted Pins 2 & 3 shorted Pins 2 & 3 shorted Pins 2 & 3 shorted
Configuration 3: One 2-wire line (CH 1); One 4-wire line (CH B).
Off
On
Off
Pins 2 & 3 shorted Pins 1 & 2 shorted Pins 2 & 3 shorted Pins 1 & 2 shorted
Configuration 4: Two 2-wire lines (CH1 & CH2); One 4-wire line (CH B).
Off
On
On
Pins 2 & 3 shorted Pins 1 & 2 shorted Pins 2 & 3 shorted Pins 1 & 2 shorted
Configuration 5: Two 2-wire lines (CH 3 & CH4); One 4-wire line (CH A).
On
Off
On
Pins 1 & 2 shorted Pins 2 & 3 shorted Pins 1 & 2 shorted Pins 2 & 3 shorted
Configuration 6: Two 4-wire lines (CH A & CH B).
On
On
On
Pins 1 & 2 shorted Pins 1 & 2 shorted Pins 1 & 2 shorted Pins 1 & 2 shorted