UTD2000 Series User Manual 
40 
 
Frequency (Freq): The reciprocal of the period 
Rise time (Rise): The time for waveform amplitude to rise from 10% to 90%. 
Fall time (Fall): The time for waveform amplitude to fall from 90% to 10%. 
Rise delay: The time for main source and slave source to delay between two rising edges 
Fall delay: The time for main source and slave source to delay between two falling edges. 
Positive width (+Width): The positive pulse width at 50% amplitude. 
Negative width (-Width): The negative pulse width at 50% amplitude. 
FRFR: The time between the first rising edge of source 1 to the first rising edge of source 
2. 
FRFF: The time between the first rising edge of source 1 to the first falling edge of source 
2. 
FFFR: The time between the the first falling edge of source 2 to the first rising edge of 
source 2. 
FFFF: The time between the first falling edge of source 1 to the first falling edge of source 
2. 
FRLF: The time between the first rising edge of source 1 to the last falling edge of source 
2. 
FRLR: The time between the first rising edge of source 1 to the last rising edge of source 
2. 
FFLR: The time between the first falling edge of source 1 to the last rising edge of source 
2. 
FFLF: The time between the first falling edge of source 1 to the last falling edge of source 
2. 
 
 
7.4 Other parameters 
Positive duty (+Duty): The ratio of positive pulse width and period. 
Negative duty (-Duty): The ratio of negative pulse width and period. 
Over shoot (OverSht): The ratio of  “Difference between max value and high value” and 
“Amplitude value”. 
Preshoot  (PreSht):  The  ratio  of  “Difference  between  min  value  and  low  value”  and 
“Amplitude value”. 
Area: The algebraic sum of the product of voltage and time for all dots on the screen. 
Cycle Area: The algebraic sum of the product of voltage and time for all dots in one cycle. 
Phase: The phase difference of main source and slave source.