Northern Airborne Technology AA34 - Manual (Page 12)

AA34 Series Universal Radio Interface
SM36 Installation and Operation Manual
Section 2 Rev: 1.00 Issue 4 Page 2-6
2.5.3 Internal Adjustments (AA34-300 and AA34-301 only)
CAUTION:
The AA34 Series Universal Radio Interface contains static sensitive devices.
Proper ESD handling procedures must be followed to prevent damage to the unit.
Sidetone Level
Adjustment
Mic Output Level
Adjustment
Mic Output
Jumper
Audio
Output
Jumper
RX Level
Adjustment
C1/C2 Mic
Isolation/Direct
Switch
S1
S2
S1 Mic DC Bias
S2 Mic Output Blocking
2.5.3.1
8/600
Ω Audio Output Impedance Adjustment
Remove the cover from the AA34 and locate the 8/600
Ω adjustment jumper JP2. When the jumper is
connected across pins A and B, the unit is set to operate with an 8
Ω load connected. When connected
across B and C, the unit is set to operate with a 600
Ω load connected. (The default setting is B – C).
2.5.3.2 8/150
Ω Mic Output Impedance Adjustment
Remove the cover from the AA34 and locate the 8/150
Ω adjustment jumper JP1. When the jumper is
connected across pins A and B, the unit is set to operate with an 8
Ω load connected. When connected
across B and C, the unit is set to operate with a 150
Ω load connected (The default setting is B – C).
ENG-FORM: 805-0121.DOT
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