User Guide
DVS-21
02/2018
• V.1.0 • L. Wolle
52/131
© 2017 ProCom
®
Professional Communication & Service GmbH • Technical changes reserved.
7.12 MI4M
Module for data acquisition and processing of 4 measuring microphones for automatic volume control of
amplifiers.
The module can process up to 4 microphones independently or as a group. It requires using the program
. There is also the configuration and calibration of control loops.
Parallel circuit
of ports
During selection the ports are determined, which are summarized in the calculation. In
addition, the type of output as respective mean or maximum value can be determined.
Calibration
offset
Adjusting the measurement output to the real ambient noise in the immediate region of
the measurement microphone. (Hardware default setting, change usually not required)
Integration time
determines the response of the measurement output to changes in ambient noise levels.
The measured values are recorded and calculated continuously. In normal operation, the output is only
activated by enabling line 1, right at the beginning of a PA.
Line function:
Port 1 - 4:
Line 1 CPU -> M Measured value during PA
Line 9 CPU -> M
Measurement output permanently (Commissioning,
Volume control - automatic
)
(Adjustment control by
Volume control - automatic
program is inactive during this
time!)
Line 10 CPU -> M
Resetting the minimum and maximum values (Commissioning,
Volume control -
automatic
)
Measurement telegrams for monitoring:
(00 00 01 3x yy) x = Type, y =
Output during PA (Line 1)
0x30h Measured value averaged
(Criterion for program
Volume control - automatic
)
0x31h present value
Output at startup mode (Line 9), Display directly in the program
Volume control - automatic
0x33h Measured value averaged
0x34h present value
0x35h Maximum value (since last reset)
0x36h Minimum value (since last reset)
0x37h Calibration offset (for info)
Display and control elements:
LEDs
GREEN - ON Measurement in progress
GREEN - OFF Idle state
GREEN - ON Ready power supply (48V)
GREEN - OFF Fuse burn-out (48V)
Line fuses
Microfuse of the supply voltage for connected devices
