Tektronix TDSUSB2 User Manual

Operating Basics Table of Measurements and Options
Table of Measurements and Options
Low Speed and F
ull Speed Measurements
Area
Option
Description
Signal Q ual
ity Check
Eye Diagram
Checks whet
her the USB signal is aligned with its
corresponding eye diagram
Signal Q uality Check Signal Rate Measures th e inverse of the average bit-time that
gives the transmission rate of the U SB signal
Signal Q u ality Check
Paired JK Jitter
Measures the jitter time for paired (JK next to KJ)
different
ial data transition
Signal Q u
ality Check
Paired KJ Jitter
Measures
the jitter time for paired (KJ next to J K)
differential data transition
Signal Q u ality Check Consecutive Jitter
Measure
s the jitter at every consecutive data bit
calculated using the signal rate
Signal Q uality Check EOP Width Measures the width of the end-of-packet of a USB
signal
Signal Q u ality Check Cross-Over voltage
Measures the voltage at which the D+ voltage
crosses the D– voltage
Signal Q u ality Check
Rising Edge Rate
Measures the Rising Edge/Slew rate in V/ μs and
is cal
culated using the Rise time a s
Rising Edge Rate = Amplitude / Rise Time
Where Amplitude is the peak-to-peak amplitude for
the c
orresponding signaling rate and the R ise time
is calculated based on the high level of the inner
vertical eye height reference levels
Signal Q u ality Check
Falling Edge Rate
Measures the Falling Edge/Slew rate in V/ μs and
is c
alculated using the Fall time as
Falling Edge Rate = Amplitude / Fall Time
Where Amplitude is the peak-to-peak amplitude for
the
corresponding signaling rate and the Fall time
is calculated based on the lower level of the inner
vertical eye height reference levels
Inrush Current Check Inrush Current Measures the amount of electrical charge drawn
by
a device as s oon as it is connected to a USB
network
D
roop Test
D
roop Test
Measures the difference in the VBUS voltage when
the load switch is open to the lowest value of the
v
oltage and the load switch
xxx
High Speed Measurements
Area
Option
Description
Signal Q u ality Check
Eye Diagram
Checks whether the USB signal is aligned with its
corresponding eye diagram
28 TDSUSB2 Universal Serial Bus Measurements Package

Tektronix TDSUSB2 Specifications

General

Brand	Tektronix
Model	TDSUSB2
Category	Measuring Instruments
Language	English