Agilent Technologies U2781A - Manual (Page 37)

Features and Functions 2
U2781A User’s Guide 25
Fan Speed Monitoring
The U2781A USB modular instrument chassis is also
integrated with a fan speed control circuit. It is used to
monitor the fan status and speed. The control circuit
communicates with backplane USB device via I
2
C interface.
Refer to Figure 2- 8 .
To query the fan status, send the SCPI command below:
SYSTem:FSTATus? {1|2}
To query the fan speed in revolutions per minute (rpm),
send the SCPI command below:
SYSTem:FSPeed? {1|2}
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