Option Uk4 Microphone Adapter And Power Supply - Agilent Technologies 35670A Service Manual

+5 V Regulator
DC-to-DC Converter
Filter
On Off
Heater Input Power
LED Drivers
Buffer
Sound Intensity Probe
Connector
Circuit Descriptions

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.
Regulates +8 V to +5 V.
Converts +5 V to +28 V. The second DC-to-DC Converter converts +28 V to +200 V.
Filters +28 V providing the microphone preamplifier voltage to pins 5 and 6 of each LEMO
connector.
Connects a 200 V polarization voltage or ground to pin 3 of each LEMO connector.
Allows an externally supplied heater voltage to be connected to pin 1 of each LEMO
connector.
Provides control lines for the overload and measurement LEDs on the HP 35230A Sound
Intensity Probe.
Buffers the trigger signal from the HP 35230A Sound Intensity Probe. A BNC cable connects
the trigger signal to the analyzer's rear panel.
Provides the interface to the HP 35230A Sound Intensity Probe.
8-40
Agilent 35670A