natus Dantec Keypoint G4 User's And Service Manual page 24

3 Channels
Power ON Indicator
The green light (LED) indicates that the amplifier power is On.
Amplifier Input (isolated)
All amplifier input connectors are electronically isolated.
Electrostatic Sensitive Amplifier Input Connectors
WARNING Do not touch the Amplifier Input connectors as it may damage the amplifier or affect its performance.
Impedance Test Key / Indicator (4/6/8 channels only)
Ω
Press the Impedance Test key to start the impedance measurement. The green light (LED) indicates that the impedance
test is in progress.
4 Channels
Loudspeaker Mute Key / Indicator
Press the Loudspeaker key to switch between the On and Off function.
The yellow light (LED) indicates that the loudspeaker is muted.
Active Electrode Indicator － Black
The Active electrode corresponds to the black input connector.
The green light (LED) indicates the results of the impedance test as described.
LED Status
All LEDs Off
Constantly lit LEDs
Reference Electrode Indicator － Red
The Reference electrode corresponds to the red input connector.
The green light (LED) indicates the results of the impedance test. See the LED Status and Results
description under the Active Electrode Indicator.
Amplifier Input Connectors (1-3) or (1-4)
The amplifier input connectors 1-3 feature both a DIN-type socket and a pair of 1.5 mm touch-
proof connectors.
Amplifier Input Connectors (4-8)
The amplifier input connectors 4-8 feature a pair of 1.5 mm touch-proof connectors. These
amplifier input connectors can share the same reference pin.
Interconnected Reference Line / Indicator
The green light (LED) indicates that the reference input connectors above the reference line are
interconnected. This feature is active when selected in the software application setup.
24
6 Channels
Result
Acceptable Impedance
High Impedance
8 Channels