Uses
- Dual channel microphone preamp. power supply
- Use with Falcon® Range Microphone Preamplifiers (Type 5935 L)
- Use with Deltatron®accelerometers and Microphone Preamplifier Type 2671 (Type 5935)
- Use with Sound Quality Head and Torso Simulator Type 4100
- Switch between two measurement positions without having to reconnect the equipment
- High quality field and laboratory measurement systems
| Features
- Amplitude- and phase-matched channels
- Charge injection calibration (Type 5935 L)
- Internal batteries for portability – alkaline or NiCd
- Fits modular cassette system for rack mounting
- 0 V, 28 V or 200 V microphone polarization voltage
- Selectable linear or A-weighted frequency response for each channel
- - 5 dB to + 55 dB channel gain range
|
Overview
The audio channels are independent, but are electrically identical, giving excellent phase characteristics and minimal gain difference between channels. The active circuitry has a high specification and will not unduly degrade signals before sending them to connected apparatus.
Type 5935 L powers the Brüel & Kjær Falcon® Range Microphone Preamplifiers and supports charge-injection calibration.
Connections
Type 5935 & 5935 L provide the polarization voltages necessary for all Brüel & Kjær Microphones; 0 V, 28 V and 200 V. These voltages are sent via the front panel sockets, which in the case of Type 5935, also supply heater current for dehumidification if an external power source is used. Type 5935 L has no input for heating element (not present in Falcon Range Preamplier Types 2669 L and 2670).
The signals are output via BNC connectors on the front and back panels. The outputs all have a low impedance (15 W). The front panel outputs are primarily for monitoring the linear or A-weighted signals, and are AC coupled. The back panel outputs, used to connect to the next instruments in the measuring chain, are DC coupled, and independently access the linear and A-weighted signals.
Power Supply
The internal batteries do not supply the preamplifier heater current. This current must be supplied by an external supply.
Applications
For example, attaching calibrated microphones or intensity probes allows high quality acoustic or intensity measurements to be made on moving vehicles under non-laboratory conditions.
It is also possible to have a mixture of microphone and accelerometer connected to Type 5935 if sound and vibration are to be investigated simultaneously. Sound quality measurements can be made using Type 5935 L and Type 4100 (with Type 2669 L).
One useful feature is the ability to route either of the inputs to a single output,...
For a full Description and Specifications, see 
Product Data
