Agilent Technologies 35670-90066 manual Option UK4 Microphone Adapter and Power Supply

Circuit Descriptions	Agilent 35670A
Option UK4 Microphone Adapter and Power Supply

	Option UK4 Microphone Adapter and Power Supply
	The optional Microphone Adapter and Power Supply provides four LEMO connectors
	with power for microphones. The input signal from each LEMO connector is routed
	to a BNC connector. BNC cables then connect the input signals to the analyzer’s input
	channels.
+5 V Regulator	Regulates +8 V to +5 V.
DC-to-DC Converter	Converts +5 V to +28 V. The second DC-to-DC Converter converts +28 V to +200 V.
Filter	Filters +28 V providing the microphone preamplifier voltage to pins 5 and 6 of each LEMO
	connector.
On Off	Connects a 200 V polarization voltage or ground to pin 3 of each LEMO connector.
Heater Input Power	Allows an externally supplied heater voltage to be connected to pin 1 of each LEMO
	connector.
LED Drivers	Provides control lines for the overload and measurement LEDs on the HP 35230A Sound
	Intensity Probe.
Buffer	Buffers the trigger signal from the HP 35230A Sound Intensity Probe. A BNC cable connects
	the trigger signal to the analyzer’s rear panel.
Sound Intensity Probe	Provides the interface to the HP 35230A Sound Intensity Probe.
Connector

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