Tektronix 2465B Operator's Manual

Performance Characteristics
Table 6-1 (cont)
Characteristics
Performance Requirements
PARAMETRIC MEASUREMENTS (cont)
Jitter Error
Noise on the input signal causes jitter which
introduces errors in the measurements. The amount
of jitter depends on the noise amplitude and the slew
rate of the input signals.
The amount of jitter can be calculated as:
jitter = '"Put noise amplitude (peak)
input slew rate in div/sec
Input slew rate should be measured at 2 Volts/div
settings more sensitive than the setting at the end of
the measurements or at 5 mV/div, whichever is less
sensitive.
The slew rate must be measured at the same points
at which the measurement will be taken. The points
for the various measurements are:
Measurement Points
Measurement
First
Measurement
point
Second
Measurement
point
Frequency
Width
Rise, Fall Time
Time interval
50% amplitude
50% amplitude
10% amplitude
Specified by
Time Interval
Configuration
50% amplitude
50% amnlituHo
90% amplitude
Specified by
Time Interval
Configuration
The algorithms used for the measurements result in
the following equation for the total jitter error that
must be applied to the accuracy specifications.
Jitter Error =
2 * first point jitter
+ 2 * second point jitter.
2465B/2455B/2445B Operators
6-17

Tektronix 2465B Specifications

General

Bandwidth	400 MHz
Channels	4
Vertical Sensitivity	2 mV/div to 5 V/div
Maximum Input Voltage	400 V (DC + peak AC)
Display	CRT
Trigger Modes	Auto, Normal, Single
Time Base Range	500 ps/div to 0.5 s/div
Rise Time	875 ps
Power Supply	48 to 440 Hz
Dimensions	495 mm