Introduction
The Ivie 802A Automatic Microphone Mixer is flexible, powerful and innovative, yet is the most
economical and simple to install automatic mixer Ivie has ever produced. In the design and
development of the 802A, great emphasis was placed on simplicity of setup and ease of operation.
The 802A can be set up using the front and rear panel controls, or it may be set up via a computer.
Please note that a computer is NOT required at any time to either setup or operate
the mixer. Although not required, a computer can increase the mixer’s power and versatility.
Once set up, the front and rear panel controls can be “locked” using an ANK-1 Audio Net™ key,
or by using a computer loaded with Audio Net™ software connected to the 802A through an Ivie
78-232A, RS232 to RS485 converter.
Four Automatic Mic/Line Inputs
The 802A has four, automatic gating, transformer balanced inputs. These inputs are connected to a
microprocessor which determines when a specific input should be gated, or turned on. Twelve
dB of attenuation is applied to an input when it is gated off. Whenever an input is gated on, the
12dB of attenuation is removed. A standard NOM attenuation of 3dB per doubling of open
microphones is applied whenever more than one microphone is gated on at a time.
Non-automatic Inputs
The mixer has two, electronically balanced, line level, non-gating inputs. These two inputs neither
affect nor are affected by the NOM attenuator.
Internal Controls
There are only four internal controls in the mixer. Input channels 1 - 4 can be set for microphone
level or line level input sensitivity. The mixer is shipped from the factory with these switches set
to microphone level sensitivity.
To access these switches, loosen the four screws that retain the lid on the mixer and remove the lid.
The switches are located on the printed circuit board. They are labeled “CHAN 1, CHAN 2,
CHAN 3, and CHAN 4. There is a silk-screen label showing the positions for mic or line level
sensitivity.
Rear Panel Controls
Input Switches for Channels 1 - 4
PH PWR -
Phantom power on/off switch. In the ON position, +15Vdc of phantom power is
applied to the input connector for the powering of condenser microphones. This switch should be
