Owner manual
Protocol Translator 
AM8 
(Slave) 
Switch in 
SLAVE Position 
AM8 
(Master) 
Switch in 
MASTER Position 
AM8 
(Slave) 
Switch in 
SLAVE Position 
PWR 
IN 
(CH40) 
OUT  IN 
EXPANSION 
M 
A 
S 
T 
E 
R 
S 
L 
A 
V 
E
20 VAC 
RS232 
PWR 
IN 
(CH40) 
OUT  IN 
EXPANSION 
M 
A 
S 
T 
E 
R 
S 
L 
A 
V 
E
20 VAC 
RS232 
PWR 
IN 
(CH40) 
OUT  IN 
EXPANSION 
M 
A 
S 
T 
E 
R 
S 
L 
A 
V 
E
20 VAC 
RS232 
PT3 
Rear 
Panel 
PT3 Front Panel 
LECTROSONICS  PT 3 
PROTOCOL TRANSLATOR 
PWR (CH40) 
PC PORT 
(RS-232) 
POWER/ 
PC  LecNet  MIDI  AXlink 
PORT STATUS 
LecNet 
EXPANSION 
AXlink PORT 
MIDI 
GND
AXM
AXP
PWR 
Typical PT3 connection to 
LecNet chain and 
computer 
Note: In AMX installations, it is possible that the PT3’s AXlink device number setting will conflict with another AMX-
compatible device until PT3 setup is complete. When in doubt, leave the AXlink port unconnected until you have set 
up the PT3. 
PT3 CONCEPTS 
The PT3 translates messages to and from the LecNet using three basic methods: 
actions
, 
monitors
, and 
strings
. 
Using these three techniques, the PT3 moves information to and from the LecNet simply, easily and flexibly. 
ACTIONS 
The most basic function the PT3 performs is to issue LecNet commands in response to AXlink or MIDI messages. 
Actions
 are named LecNet commands, which may be used with little regard for the underlying byte sequences or 
timings. The PT3 translates AXlink or MIDI messages (known as 
triggers
) into LecNet actions. This collection of 
translations comprises the 
action map
, which is nothing more than a list of triggers (AXlink or MIDI messages) and 
their associated LecNet actions. One trigger may set off an ordered sequence of actions, if desired. 
Rio Rancho, NM – USA 
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