BNC 725 - Manual (Page 55)

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NOTE: Channel LEDs provide important information about the channels, but an
oscilloscope remains a useful tool for diagnosing channel outputs, particularly for high-
speed experiments.
ALL Channel LED
The All Channel LED shows the overall status of the channels.
A green LED indicates that the external inputs and outputs are enabled and functioning normally
A red LED indicates that the external inputs and outputs are frozen. (See Running Experiments:
Disable/ Enable channels below).
Selecting a Channel from the Front Panel
Each front panel function requires that you select a channel (or ALL channels) and a function.
To select a channel, click the channel button. The channel LED will glow brightly, as will the
available Function buttons. The ALL channels button will function similarly to select all channels.
You can now perform one of the front panel functions on that channel.
In the image below, the F channel button has just been pressed. The buttons for the four available
functions (Enable, Disable, Trigger and Reset) glow yellow.