HP LaserJet 3020 All-in-One Printer - Manual (Page 140)

Scanner Duty Cycle 2,000 single-sided items per month
Scan resolution 600 dpi color
Automatic document feeder (ADF) input tray specifications
Input capacity Up to 50 sheets of flat 60 to 75 g/m 2 (16 to 20 lb)
media
Media weight 60 to 90 g/m 2 (16 to 24 lb)
Media size 127 by 127 mm (5 by 5 inches) to 216 by 381 mm
(8.5 by 15 inches)
Speed Up to 14 ppm for letter-size or A4-size media
Duty cycle 1,000 pages per month
Port availability
USB Compatible with USB 2.0 specification
Parallel ● IEEE 1284-B level 2 device with an IEEE
1284-B receptacle
● Set the host computer to ECP (enhanced
capabilities mode)
130 Appendix A Specifications ENWW