Princeton 4411-0087 Manuale Utente

70 

ST-133 Controller Manual 

Version 3.B 

 

Operation of the PTG module is quite simple. Most of the functions are performed 
automatically through the backplane and the parameters are set via the Pulser Setup 
screens of the host software (WinView/32 or WinSpec/32, version 2.4 and higher). 
Operated in the External Trigger mode, a trigger is applied to the Ext. Trig. In 
connector. No other connections to the PTG’s BNC connectors are required. When 
operated in the Internal Trigger mode, unless a PTG output is used to trigger a peripheral 
system component, no connections to the BNC connectors would be required at all. 
Figure 33 illustrates the connections in a typical system.   

PTG

ST-133A Controller

Computer

High Speed

Serial Link

Spectrograph

(320PI)

GPIB

Timing

Gen

Signal/

Power

PI-MAX

EXT. TRIG. IN

PRE. TRIG. IN

TIMING GEN.

AUX. TRIG. OUT

TRIG.

Detector

Serial Comm

Trig IN

T0

6050-0369

6050-0336

 

There are two possible conflicts that need to be avoided when pulsing an intensifier. 

•  To prevent artifacts from the laser from affecting the data, a readout should not be 

initiated while the PTG is busy.  

•  Triggering the timing generator should be inhibited while a readout is in progress to 

prevent high-voltage pulses from causing artifacts in the data. 

The handshakes to accomplish these enabling/inhibiting operations take place 
automatically, the necessary signals being exchanged via the backplane. No extra cabling 
or operator intervention is required.