Setting Up Digital Channels (Mso2000 Series Only) - Tektronix DPO2000 Series User Manual

Acquire the Signal
When decoding an RS-232 bus in ASCII mode,
a large dot indicates that the value represents
a character outside the printable ASCII range.

Setting Up Digital Channels (MSO2000 Series Only)

Use front-panel buttons and knobs to set up your oscilloscope to acquire signals using the digital channels available only
on MSO2000 models.
112 DPO2000 and MSO2000 Series Oscilloscopes User Manual