Sound Devices PIX 220i - Manual (Page 49)

When the Setup Menu option System  Rec Start/Stop to Switch Closure, recording will be-
gin when the Switch Input (tip) is connected to ground (sleeve) and recording will stop when
the Switch Input (tip) is disconnected from ground (sleeve). When the Setup Menu option
System
 Rec Start/Stop to Switch Momentary, recording will begin when the Switch Input (tip)
is connected to ground (sleeve) and recording will stop when the Switch Input (tip) is connected to
ground (sleeve) a subsequent time.
To use the LED output, connect an LED between the 2.5mm ring and sleeve with a series resistor.
The anode (+) of the LED should connect to the ring and the cathode (-) to the sleeve. A good starting
point for the resistor value is 220i ohms, but the value depends on the particular LED used. The ring
is internally connected to 5V when recording (and to 0V otherwise) with a series 100 ohm resistor.
USB Keyboard
The PIX recorders support standard USB keyboards connected to the USB A connector on the Right
Panel. The keyboard can be used to navigate menus, enter text, and perform various other functions.
A full list of keyboard commands is included in the rear of this guide. ( See “Keyboard Shortcuts”, page
65 )
Keyboards with integrated USB hubs are not supported.
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PIX 220i and PIX 240i Video Recorder User Guide
47