各位先進好，小弟最近購入Cambridge 651a的綜合擴大機，對背面的插孔有些疑問。
背面有Control bus input/output以及另一個孔 IR Emitter。不知道這兩個孔是用在什麼用途的呢？
另外......我上網查了這台擴大機後出現的都是"台中崇仁視聽音響"的拍賣網頁。而我想說問店家應該最快，結果在問與答的地方發問了這個問題，過幾天看了之後發現我的問題不見了。想說是不是系統有問題，不信邪的再發問了一次一樣的問題。結果今天看還是不見了，我懷疑是不是店家不懂怕露餡所以把我的問題刪除了呢？如果是這樣的話，這種店家也太爛了吧！
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Allows modulated IR commands from multi-room systems or IR repeater
systems to be received by the amplifier. Commands received here are not
looped out of the Control Bus. Refer to the ‘Custom Installation’ section
for more information.
【Control Bus】控制匯流排
In Allows un-modulated commands from multi-room systems or other
components to be received by the unit.
Out Loop out for control bus commands to another unit.
The 651A feature a Control Bus input/output that allow un-modulated
remote control commands (positive logic, TTL level) to be received
electrically by the unit and looped to another unit if desired. These control
commands are typically generated by custom installation (multi-room)
systems or remote IR receiver systems. The Control Bus sockets are
colour-coded orange.
An IR Emitter Input is also provided that allows modulated IR remote
control commands to be received electrically by the unit. Commands on
this input operate the unit only and are not looped out demodulated on
the Control Bus Output.
In addition the units feature 'direct' IR/Control codes as well as toggle
codes for some of their features to simplify programming custom
installation systems. Special direct On/Off and Mute commands can be
accessed on the supplied remote control for teaching into C.I. systems
as follows:
1. Press and hold the Standby button. The remote first generates its
standby (toggle) command. Keep holding the button down and after
12 seconds an amplifier “On” command will be generated. If the
button is held down for a further 12 seconds, an amplifier “Off”
command is generated.
2. Press and hold the Mute button. The remote first generates its
mute (toggle) command. Keep holding the button down and after
12 seconds a “Mute On” command will be generated. If the button is
held down for a further 12 seconds, a “Mute Off” command is
generated.
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