Tektronix BERTScope, Быстрый старт Руководство пользователя

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Operation
Interface and display information
Many industry standards are available from the front panel menu. The current settings appear on the right side of the display.
The following table shows settings that you can enter manually.
Table 2: Display settings
Item Description
Nominal Data Rate Nominal rate of the recovered clock
Lock Range Frequency range around the nominal rate that will be scanned during locking
Bandwidth Bandwidth of the recovery loop measured at –3 dB
Peaking Peaking of the recovery loop. Also sets fi rst or second order roll-off of untracked jitter
Nominal Edge Density Expected edge density of incoming data. Required to set bandwidth correctly
Edge Density Mode Sets bandwidth. Calculations are based on Nominal Edge Density or edge density
measured during lock
Clock Amplitude Output amplitude of the full rate clock
Subrate Amplitude Output amplitude of the subrate clock
Subrate Division Division ratio of the subrate clock
By default, all settings will be saved automatically when you power off the instrument will be restored when you turn the
instrument on. You can save current settings to one of four setups to be recalled later.
Several continuously updated measurements are shown on the front panel display.
Figure 4: Measured values
10 CR125A, CR175A, CR286A Quick Start User Manual