User manual

page 12 of 15
21016 SMU1-MPAB3 V1.3.doc
MPAB3 Connector pin-outs and Jumper settings
MPAB3
Wiring
MPAB3 Connection Details MPAB3 (D718) Jumper settings
Omit 2 tone chime J1
Fit 3 tone chime
Omit Enable Chime J2
Fit Disable Chime
Omit Ptt Operation, Active Low (Fit J5) J3
Fit Ptt Operation, Active High (Omit J5)
Omit Normal Operation J4
Fit Permanently Enable Pre Amplifier
Omit Ptt Operation, Active High (Fit J3) J5
Fit Ptt Operation, Active Low (Omit J3)
Omit Power Off J6
Fit Power On
Omit A1 > A1 J7
Fit A1 > SCREEN
MPAB3 Trim Pot Settings
VR1 – Distortion Trim (Do Not Adjust)
VR2 – Set 20kHz Level
VR3 – Set Chime Level
VR4 – Set Threshold for Limiter
VR5 – Microphone Gain
VR6 – Set Chime Pitch
VR7 – Output Gain