Aneng Q1 User Manual page 11

Push this button when the product is at the
setting of ACV, the primary measurement
display will show the current frequency
(1~100kHz) while the secondary measurement
display will show the current duty cycle.
⑦
Push this button when the product is at the
setting of ACmV, the primary measurement
display will show the current frequency
(1~5MHz) while the secondary measurement
display will show the current duty cycle.
7