Power Module - Type 12HM

The G.R.A.S. Power Module Type 12HM is a 10-channel power supply for multi-channel low-noise measurements using the matched, low-noise preamplifiers and high-sensitive microphones of a G.R.A.S. low-noise measuring system.

The Type 12HM provides:

• polarisation voltage (200 V) for up to 10 condenser microphones
• voltage supplies (±15 V) for powering up to 10 microphone preamplifiers
• individual response setting, pressure or free field, for each channel
• individual gain adjustement of ±3 dB for each channel
  

When fitted with the above matched preamplifiers and microphones, each channel of the Type 12HM supports the specifications of a G.R.A.S. low-noise measuring system, and can be used in sound-pwer measurements of low-noise products, such as disk drives, under anechoic or semi-anechoic conditions in accordance with IEC 745:1977.

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Related Products:

Type 12HF

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10 x 7-pin LEMO EGA 1B connectors

10 x BNC sockets

30 Ohm

200 V

 ± 3 dB

> 90 dB

115 or 230V AC, max. 35 VA

height: 132.6 mm (5¼")
width: 420 mm (16½")
depth: 196.0 mm (7.7")

5.5 kg (12 lbs)