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Summary of Contents for GRAS 12AD
- Page 1 Instruction Manual 12AD Power Module...
- Page 2 Revision 29 10 2007...
- Page 3 CONTENTS Introduction and Description........3 Polarization Voltage .
- Page 4 200 V for externally-polarized microphones Power Supplies The Type 12AD can run on batteries with a battery life of approximately 50 hours using G.R.A.S. preamplifiers, or from an external power supply of 4.5 - 24 V DC (see section 3).
- Page 5 7-pin power OK LEMO connector Red LED Batt. Output BNC socket Fig. 2.1 Front panel of the Power Supply Type 12AD Fig. 2.2 7-pin LEMO female socket 1B (external view) Power Module Type 12AD - Page 5...
- Page 6 The external power supply should be a mains/line adapter regulated to supply 4.5 - 24 V DC with the centre pin as the + terminal. When the Type 12AD is switched on via the l – O switch on the front panel, the green Power LED will light up, and the red Low Batt. indicator should remain extinguished to ensure correct operation of the unit.
- Page 7 160 mA. Operation Make sure that power is available to the Type 12AD (see section 3) but don’t switch it on yet. Select which polarization to use (200 V for an externally polarized microphone or 0 V for a prepolarized microphone).
- Page 8 4 x LR6 (AA) batteries 93/68/EEC WEEE directive: 2002/96/EC RoHS directive: 2002/95/EC G.R.A.S. Sound & Vibration continually strives to improve the quality of our products for our customers; therefore, the specifications and accessories are subject to change. Power Module Type 12AD - Page 8...
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