Extinction dB. Optical measurement. Extinction dB is typically 8 to 12 db. To exceed this range the input may be from nonoptical
probes or noncommunication lasers.
Extinction dB = 10.0 (log
10
(Extinction Ratio))
Fall time. fall time
Timing measurement. The time taken for the falling edge of a pulse to drop from a HighRef value (default = 90%) to a LowRef
value (default = 10%).
The following figure shows a falling edge with the two crossings necessary to calculate a Fall measurement.
1. Searching from Start to End, find the first sample in the measurement zone greater than HighRef.
2. From this sample, continue the search to find the first (negative) crossing of HighRef. The time of this crossing is THF. (Use
linear interpolation if necessary.)
Figure 22: Fall Time
3. From THF, continue the search, looking for a crossing of LowRef. Update THF if subsequent HighRef crossings are found.
When a LowRef crossing is found, it becomes TLF. (Use linear interpolation if necessary.)
4. FallTime = TLF – THF
Frequency. Timing measurement. The reciprocal of the period. Measured in Hertz (Hz) where 1 Hz = 1 cycle per second.
If Period = 0 or is otherwise bad, return an error.
Frequency = 1 / Period
High. 100% (highest) voltage reference value. See
Using the min-max measurement technique:
High = Max
Oscilloscope reference
692
DPO70000SX, MSO/DPO70000DX, MSO/DPO70000C, DPO7000C, and MSO/DPO5000B Series
Summary of Contents for DPO2304SX
Page 1: ...Tektronix Digital Phosphor Oscilloscopes Printable Help P077006219 077 0062 19...
Page 2: ......
Page 3: ...Tektronix Digital Phosphor Oscilloscopes Printable Help www tek com 077 0062 19...
Page 32: ...Introduction xxviii DPO70000SX MSO DPO70000DX MSO DPO70000C DPO7000C and MSO DPO5000B Series...
Page 130: ...Cursor setups 98 DPO70000SX MSO DPO70000DX MSO DPO70000C DPO7000C and MSO DPO5000B Series...
Page 198: ...MagniVu setup 166 DPO70000SX MSO DPO70000DX MSO DPO70000C DPO7000C and MSO DPO5000B Series...
Page 212: ...Display setups 180 DPO70000SX MSO DPO70000DX MSO DPO70000C DPO7000C and MSO DPO5000B Series...
Page 300: ...Math setups 268 DPO70000SX MSO DPO70000DX MSO DPO70000C DPO7000C and MSO DPO5000B Series...
Page 408: ...MyScope setups 376 DPO70000SX MSO DPO70000DX MSO DPO70000C DPO7000C and MSO DPO5000B Series...
Page 510: ...Trigger setups 478 DPO70000SX MSO DPO70000DX MSO DPO70000C DPO7000C and MSO DPO5000B Series...
Page 548: ...Vertical setups 516 DPO70000SX MSO DPO70000DX MSO DPO70000C DPO7000C and MSO DPO5000B Series...
Page 605: ...Utilities DPO70000SX MSO DPO70000DX MSO DPO70000C DPO7000C and MSO DPO5000B Series 573...
Page 606: ...Utilities 574 DPO70000SX MSO DPO70000DX MSO DPO70000C DPO7000C and MSO DPO5000B Series...
Page 920: ...Index 888 DPO70000SX MSO DPO70000DX MSO DPO70000C DPO7000C and MSO DPO5000B Series...