Power Module - Type 12AA

The Power Module Type 12AA is a two-channel, battery-operated, microphone power supply, amplifier and filter unit. It has two 7-pin LEMO 1B input connectors for microphone preamplifiers as well as two BNC output sockets. Both channels have an overload indicator and a gain that can be set to -20 dB, 0 dB, +20 dB or +40 dB.

The A-weighting network fulfils the requirements of IEC 60651 for Type 0 Sound Level Meters. The high-pass filters are 3-pole butterworth filters with a cut-off frequency at 20 Hz.

The Type 12AA has a battery indicator to monitor battery condition and an input socket for an external power supply. It also has a built-in 1 kHz precision calibration generator with adjustable levels for both channels. The generator can be activated either via a front-panel button or remotely.

The cabinet width is ¹/₁₂^th of a standard 19" rack. With the rack mounting system Type AK0040, 12 of these Power Modules can be mounted in a standard 19" rack.

19" Rack-mounting System AK0040
The AK0040 is a shelf for mounting instrument cabinets, e.g. G.R.A.S. Power Modules, and can itself be mounted in a standard 19" instrumentation rack via its flanges. It can house instruments 133 mm high and is wide enough to contain instruments amounting up to a total width of 430 mm.

Download PDF Data Sheet: pd_12AA_ver_21_12_05.PDF

Related Products:

Type 12AB
Type 12AD
Type 12AG
Type 12AK
Type 12AN
Type 12AP
Type 12AR

Adobe Acrobat reader is required for viewing data sheets.

2 x 7-pin LEMO 1B connectors

2 × BNC sockets

-20 dB, 0 dB, +20 dB, +40 dB

28 V or 120 V

200 V or 0 V

3.5 Hz - 200 kHz

IEC 60651 Type 0

30 Ohm

10 x AA alkaline batteries
or 12 - 18 V DC mains/line adaptor for 220/115 V

height: 132.6 mm
width: 34.6 mm
depth: 196 mm

770 g