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Joined: Jan 2005
Posts: 15,381 Likes: 13
Moderator-Vertical, Vodavi, 1A2, Outside Wire
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Moderator-Vertical, Vodavi, 1A2, Outside Wire
Joined: Jan 2005
Posts: 15,381 Likes: 13 |
Originally posted by AAA:
What is a "filtered 24vdc or 48vdc talk battery power supply". The power to provide a talk path between two points must be clean DC, usually between 24 and 48 volts nominal. AC cannot be used because of the noise, almost a loud buzzing. Even DC still has shades of AC noise, so it must be filtered to provide a crystal clear talk path. This is accomplished in the power supply by using a network of capacitors to smooth out the AC hum.
Ed Vaughn, MBSWWYPBX
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