Handbook

Table Of Contents
Redbox User Handbook No 3
41
Frequencies and Sync Modes
Rotary
Switch
Number
Mode Sample
Frequency
(kHz)
0 Master 32
1 Master 44.1
2 Master 48
3 Master 64
4 Master 88.2
5 Master 96
6 Auto 32
7 Auto 44.1
8 Auto 48
9 Auto 64
A Auto 88.2
B Auto 96
C Auto Lock -
D Slave -
F Calibration -
Fig 6-7: RB-DMA2 Frequency and Sync Rotary Switch Selections.
Test/Calibration Mode
For optimum performance of the RB-DMA2, the unit should be calibrated when it has been
powered up for approximately 10-15 minutes. The circuitry and chipsets contained in the
unit will warm up during this time and the performance will deteriorate unless calibrated
(the noise oor and dynamic range will be 1-2dB lower than the best possible performance).
The calibration cycle calibrates the gain and the zero reference of the A/D converter.
To calibrate the RB-DMA2, set the rotary FREQUENCIES AND SYNC MODES switch to position
“F”. The power LED on the front panel will ash quickly for 2 – 3 seconds and will illuminate
fully when the unit is calibrated. Once calibration is complete, reset the rotary switch to the
position that you require.
6
MICROP HONE AMPLIF IERS
& LIMITERS
MICROPHONE AMPLIFIERS & LIMITERS - RB-DMA2