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C2649M (9/07) 13
Figure 4. Audio Select Switch
Table A. Audio Select Switch Settings
Switch Setting Audio Mode
0 (default setting) UNBAL 47K Ω: Unbalanced audio signals, 47K-ohm input
impedance
1
BAL 600 Ω: Balanced audio signals, 600-ohm input
impedance
NOTE: Switch settings 2-9 are not used. If switch setting 2-9 is selected, the
Audio Present LED lights red.
0. UNBAL 47K
1. BAL 600
2-9 NOT USED
DATA
SELECT
AUDIO
SELECT
0. RS-232
1. RS-422
2. RS-485 2W
3. RS-485 4W
4. Man/Bi-Phase
5. Coaxitron
6-9 NOT USED
AUDIO SELECT SWITCH