9 Characteristics and Specifications  
Agilent U1602B/U1604B User’s and Service Guide  185
When performing measurement, ensure that the right safety and performance 
ratings of instrument and accessories are used.
Maximum input voltage
• Input CH1 and CH2 direct (1:1 Probe) — 300 V CAT III
• Input CH1 and CH2 via 1:10 Probe 
— 600 V CAT III
• Input CH1 and CH2 via 1:100 Probe 
— 600 V CAT III
• Meter Input 
— 300 V CAT III, 600 V CAT II
• Scope Input — 300 V CAT III
•
Voltage ratings are Vrms (50/60 Hz) for AC sine wave and VDC for DC 
applications.
Maximum floating voltage
• From any terminal to ground 
— 300 Vrms CAT III (up to 400 Hz)