10
Chapter 2. Connections and controls
3
1
4
1 +12 V
3
−
12 V
4 0 V
Figure 2.1:
M8 connector pinout for
POWER A, B
.
MOD IN
High-bandwidth modulation input, added directly to fast output,
±
1
V
if
DIP4
is on. Note that if
DIP4
is on,
MOD IN
should be
connected to a supply, or properly terminated.
SLOW OUT
Slow control signal output, 0 V to 2.5 V. Normally connected to a
piezo driver or other slow actuator.
FAST OUT
Fast control signal output,
±
2
.
5 V. Normally connected to diode in-
jection current, acousto- or electro-optic modulator, or other fast
actuator.
MONITOR 1, 2
Selected signal output for monitoring.
TRIG
Low to high
TTL
output at sweep centre.
LOCK IN
TTL
scan/lock control; 3.5 mm stereo connector, left/right (pins 2, 3)
for slow/fast lock; low (ground) is active (enable lock). Front-panel
scan/lock switch must be on
SCAN
for
LOCK IN
to have effect. Digikey
cable
CP-2207-ND
provides a 3.5 mm plug with wire ends; red for slow
lock, thin black for fast lock, and thick black for ground.
1
2
3
1 Ground
2 Fast lock
3 Slow lock
Figure 2.2:
3.5 mm stereo connector pinout for
TTL
scan/lock control.
