Instruction manual

Installation: DIP Switch and Jumper Settings
6881086C22-B 9
Audio Interface Board
Settings
BOLD indicates factory default setting
BOLD indicates factory default setting
Review “Safe Handling of CMOS Integrated-Circuit
Devices” on page xi before setting any DIP switches
or jumpers.
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C a u t i o n
Table 1. Audio Interface Board DIP Switch Settings
Switch State Description
S101-1
ON ASTRO control head power button disabled
OFF ASTRO control head power button enabled
S101-2 Not used
S101-3 ON EMER active high
OFF EMER active low
S101-4 ON 600Ω Impedance
OFF 900Ω Impedance
S101-5 ON 900Ω Impedance
OFF 600Ω Impedance
S101-6
ON Local desk microphone not present
OFF Local desk microphone present
S101-7
ON Digital Remote Control option present
OFF Digital Remote Control option not present
S101-8 Not used
Table 2. Audio Interface Board Jumper Settings
Jumper State Description
JU101 IN Always placed for ASTRO
J14
A-B
Transmitted and received audio is routed to
TAPE_OUT (Accessory Connector 3, pin 11)
B-C
Only received audio is routed to TAPE_OUT
(Accessory Connector 3, pin 11)
J15
A-B SPKR_UNMUTE active high (COR)
B-C SPKR_UNMUTE active low (COR)