PROFESSIONAL SOUND CORPORATION MJR Portable Audio Mixer Operation Manual for Mixers with PCB V1.2 Copyright 1999, 2000, 2001, 2002 Professional Sound Corporation Printed in the U.S.A.
TABLE OF CONTENTS DESCRIPTION……………………………………………………………………………4 SAFETY WARNINGS……………………………………………………………………4 APPLICATIONS…………………………………………………………………………..4 FUNCTIONS INPUTS……………………………………………………………………………..5 A. BALANCED INPUTS B. INPUT LEVELS C. MICROPHONE POWERING D. LOW CUT FILTER E. CHANNEL GAIN F. CHANNEL PANS OUTPUTS…………………………………………………………………………...6 MONITOR……………………………………………………………………………6 TAPE RETURNS……………………………………………………………………6 METERS……………………………………………………………………………...
POWERING…………………………………………………………………………..8 A. INTERNAL POWER CONSTRUCTION…………………………………………………………………….9 A. CHASSIS B. ELECTRONIC TOPOLOGY C. ENVIRONMENTAL OPERATION INTERFACING………………………………………………………………………10 A. TO BETACAMS B. TO RDAT RECORDERS C. TO WIRELESS MICROPHONES D. SPECIAL NOTES WARRANTY AND NON-WARRANTY SERVICE…………………………………11 SPECIFICATIONS…………………………………………………………………….
DESCRIPTION Thank you for purchasing the Professional Sound Corporation Mjr Portable Audio Mixer. PSC is confident that this new Mjr Mixer has set new standards for portable mixer technologies and features. Please feel free to contact us if you have any comments or questions concerning your new mixer. Additionally, we invite you to share your suggestions for new products you would like to see developed.
INPUTS: A. BALANCED INPUTS The PSC Mjr Audio Mixer provides two input channels utilizing female XLR connectors. The professional grade input circuitry is transformer balanced for improved RF rejection and in-field practicality. The XLR connectors are wired as follows: Pin 1 shield (ground), Pin 2 Audio high (in phase), Pin 3 Audio low (out of phase). Balanced wiring enables longer cable runs without the worry of excessive noise due to nearby electromagnetic and radio frequency interference.
In the interest of keeping the Mjr Mixer design simple and up to date with today’s technology, we have not offered “12T” or “AB” microphone powering. Although some “12T” microphones are still in existence, all new microphone designs are 48PH. D. LOW CUT FILTERS Each input channel of the Mjr Mixer is equipped with a HP (high pass) filter. These filters are activated via the switches located below the adjacent channel fader knobs.
B. MULTI-PIN (BETACAM) CONNECTOR The Mjr Mixer is equipped with a multi-pin in/out connector designed primarily to interface with Betacams. This connector provides the left and right balanced outputs as well as left and right tape returns used for confidence monitoring. This multi-pin connection provides a convenient means of interfacing to Betacams with only one connection. In addition, this connection is located on the back side of the mixer.
progression of colors from green to yellow to red thus you can easily identify levels at a quick glance. ADDITIONAL FEATURES: A. SLATE MICROPHONE The Mjr Mixer is equipped with a slate microphone. This microphone is activated when the front panel “slate” momentary push button switch is pressed. The slate microphone allows the operator to put voice slates (notes) on tape for later reference. These are normally notes for editing tape.
The Mjr Mixer consumes approximately 50-60mA of current when no microphones are being powered. This translates into a battery life of 5 to 10 hours. To remove the battery simply push down on the battery door and pull out the battery. Note: Never store your Mjr Mixer for extended periods of time with a battery installed in the mixer. There is a possibility that the battery may leak causing corrosion of the mixer. Battery leakage and the resulting corrosion damage is not covered under the Mjr Mixer warranty.
This in addition to the Mjr’s ability to operate under high humidity conditions makes it perfect for harsh field conditions. INTERFACING A. TO BETACAMS: The PSC Mjr Mixer is especially designed for easy interfacing with all popular Betacam type cameras. The Mjr is equipped with a 10 pin Hirose tm connector on the rear panel. This all-inclusive connector provides both left and right balanced outputs and tape returns.
The Mjr Mixer can also be used to send audio signals to Betacams via wireless transmitters. The use of transmitters is normally accomplished by connecting the Mjr’s 10 pin output connector to the audio input of the specific transmitter. It is important to note that transmitter placement greatly affects transmit range and clarity. For best results, transmitters should be mounted away from the mixers surface allowing un-impeaded RF radiation. D.
SPECIFICATIONS Size: 4.70” x 6.00” x 1.80” (119mm x 152mm x 46mm) Weight: 1.5lbs. (0.7Kg) Temp Range: -4 to +158F (-20 to +70C) Batteries: 1x 9V Alkaline Case Material: 0.070” (2.2mm) Aircraft Aluminum Finish: Epoxy Powder Coat Overlays: 0.005” Hardface Lexan tm with Sub-surface Epoxy silk screening Global Gain: 70dB Freq. Response: 20-20Khz +/-1dB Signal to Noise: 128.5dB EIN 150 Ohms Distortion: 00.
