Tektronix WVR8200 Technical Reference page 12

Physical, Environmental, and Power Specifications
Table 3: Environmental specifications (cont.)
Characteristic
Cooling
Pollution Degree
2
Description
The variable fans provide forced air circulation. Do not block
ventilation openings.
The intake air vents in the front of the instrument must not be
blocked and the rear exhaust vents requires at least 1 inch
of clearance. No clearance is required above or below the
instrument.
2, Indoor use only
WVR8200 and WVR8300 System Integrator