Telecast Fiber Systems – CopperHead 3400 Transceiver System User Guide –
Preliminary Version
Page 68
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CopperHead 3400 Camera Unit Audio/Intercom/IFB 4-Switch Panel
(#20 on the diagram above)
1)
Audio Input LINE/MIC Switch
Left position sets audio inputs to line level (+4dB).
Right position switches audio inputs to MIC level and
enables Switch #2
2)
MIC Input Level Switch
Left position sets MIC input level to -60dB. Right
position sets MIC input level to -10dB.
3)
IFB WET/DRY Switch
Left position sets IFB connector to Powered (“Wet”).
Right position sets IFB connector to Unpowered
(“Dry”).
4)
PTT (Push-to-Talk) –
Sets Intercom push-to-talk function to local or remote
Figure 34 - Local Activation of Channel 1 Talk Back
The Copperhead 3400 Camera Unit allows you to select one or both Intercom Channels to be active.
1. To set listening level for an intercom channel, adjust the desired LISTEN control knobs at the top
of the Audio Interface box.
2. To set listening level for the Program level (mixed in with the Intercom audio), adjust the PRGM
control knob. When there is activity on either of the Intercom Channels or the Program audio,
the indicator LEDs while come on. The drawing represents activity on CH1 Intercom.
3. The Intercom Talkback Control or Channel Select Switch controls which Intercom Channel is
active for Talk Back from the Camera Position. This switch does not control which Intercom
audio stream you will hear. The Channel Select Switch is a 5-way toggle switch.
To turn on Talk Back for an intercom channel push the toggle switch up or down depending on
which channel desired. Assuming the LED for CH1 Talk is not lit, the first push up on the switch
will turn on the CH1 Talk Back and the LED will illuminate. The second push up on the switch will
turn off the CH1 Talk Back and the LED will go out. A third push up on the switch will once again
turn on the CH1 Talk Back.
The Channel 2 Talk Back works identically with the switch being pushed downward to control
the Talk Back function.
The middle position allows both channels to remain in the off position.
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