LSM 710 and LSM 780
NOTES ON DEVICE SAFETY
Systems
User Interface
Carl Zeiss
02/2010 M60-1-0025
e
37
1.11.7
Using External Connectors
In the rear of the APD module, you have external
access to the TTL pulses of both channels delivered
at the APD 1 and APD 2 plugs (see Fig. 36).
Please note that the plug is of BNT type and
BNT triax cables should be used. If using BNC
connectors and coax cables the signal quality
can suffer dramatically.
The assignment of the connectors is as follows:
Name APD
GaAsP
(no serial offer)
Meaning
LVDS
14-pin MDR
14-pin MDR
Main communication link
Sub-LVDS
14-pin MDR
Communication to optional module
Safety
8-pin LEMO EXJ-1B
8-pin LEMO EXJ-1B
Laser safety
Power
16-pin LEMO ECJ-2B 16-pin LEMO ECJ-2B Power consumption: less than 20 W
CAN
15-pin HD Sub-D
female
15-pin HD Sub-D
female
Optional CAN Port / Service Port
RS232
9-pin Sub-D male
Service Port
APD 1 / 2 Triax BNT
Photon pulse- level: 2.5 V at 50
Ω
,
30 nsek long
Gate 1 / 2 Triax BNT
Gate APD- TTL level
To connect the ConfoCor 3 to an optional correlator card, use the connectors APD 1 / 2. As long as the
maximum count rate is not reached, each TTL Pulse corresponds to one photon. Take care to use 50
Ω
termination to avoid reflections and use double shielded 'triax' cable to avoid heavy distortions of the
signal. To connect to BNC equipment, connect inner shield to ground and leave outer shield open.
For gating the APD use TTL signals.
To connect the ConfoCor 3 to an optional FLIM card, use the connectors APD 1 / 2. APD 1 / 2 delivers
directly the APD signal (jitter 350 psec) according to the manufacturer's data sheet.
Fig. 36
Rear view APD module