Fcc notices, Radio frequency interference (rfi) (fcc 15.105), Labeling requirements (fcc 15.19) – Comtrol PCI 422 User Manual
Page 8: Modifications (fcc 15.21), Serial cables (fcc 15.27)

8
FCC Notices
FCC Notices
Radio Frequency 
Interference (RFI) 
(FCC 15.105)
This equipment has been tested and found to comply with the limits for Class
B
digital devices pursuant to Part 15 of the FCC Rules.
This equipment generates, uses, and can radiate radio frequency energy, and if not 
installed and used in accordance with the instruction manual, may cause harmful 
interference to radio communications. However, there is no guarantee that 
interference will not occur in a particular installation. If this equipment does 
cause harmful interference to radio or television reception, which can be 
determined by turning the equipment off and on, the user is encouraged to try and 
correct the interference by one or more of the following measures:
•
Reorient or relocate the receiving antenna.
•
Increase the distance between the equipment and receiver.
•
Connect the equipment to an outlet on a circuit different from that to which 
the receiver is connected.
•
Consult the dealer or an experienced radio/TV technician for help.
Labeling 
Requirements (FCC 
15.19)
This equipment complies with Part 15 of FCC Rules. Operation is subject to the 
following two conditions:
•
This device may not cause harmful interference, and
•
This device must accept any interference received, including interference that 
may cause undesired operation.
Modifications (FCC 
15.21)
Changes or modifications to this equipment not expressly approved by Comtrol 
Corporation may void the user’s authority to operate this equipment.
Serial Cables (FCC 
15.27)
This equipment is certified for Class A operation when used with shielded cables.
