4 sqm-242 card connections – INFICON SQM-242 Thin Film Deposition Controller Card Operating Manual User Manual
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SQM-242 Operating Manual
2.4 SQM-242 Card Connections
The control output and sensor input connectors to the SQM-242 card are shown 
below. Refer to this drawing in the subsequent hookup instructions. 
Figure 2-3 SQM-242 Setup
Sensor Connections
A BNC cable connects the SQM-242 sensor input to the 
"instrument" connector on the remote oscillator. The 
maximum length is 50 feet (15 meters). 
To ensure proper operation of the SQM-242, use oscillators 
manufactured by INFICON [PN 782-900-010]. 
The connection from the remote oscillator "feedthru" 
connector to the vacuum chamber feedthrough is made using 
a short 6 inch (15 cm) cable with BNC male to female 
connectors [PN 782-902-011]. Inside the vacuum chamber, your in-vac cable must 
be no longer than 36 inches (91.4 cm). It connects from the feed-through to the 
crystal sensor. 
NOTE: The SQM-242 will not work with INFICON ModeLock oscillators.
Sensor 1
Sensor 2
Sensor 3
Sensor 4
Power Supply
Control Outputs
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