Anritsu BERTWave Series, Руководство по эксплуатации, Страница: 260 / 466

Chapter 6 How to Operate Sampling Scope
6-66
Setting Rate 6.5
To collect data, the trigger clock synchronized with the input signal is
required.
When BERT is installed in MP2110A, the synchronizing clock (Sync Out)
can be used as the trigger clock.
When MP2110A-054 Clock Recovery or MP2110A-055 26G/53Gbaud
Clock Recovery (SM Optical) is installed, the clock recovery unit can be
set.
After the trigger clock is input to the MP2110A, set the symbol rate, clock
rate, and divide ratio.
The symbol rate is the modulation rate of the signal to measure with
Scope (
Ch A In
or
Ch B In
, or for quad channel, the signal input to
A
,
B
,
C
or
D
).
The clock rate is the frequency of the trigger clock.
Divide Ratio is the ratio between data symbol rate and clock rate.
The value should be inputted to complete the following formula.
Symbol Rate = Clock Rate  Divide Ratio
CAUTION
● The impedance of the Trigger Clk In connector is 50 Ω.
Measurement may not be performed correctly if a cable
with another impedance is used.
● The amplitude of the signal input to the Trigger Clk In
connector is 2 Vp-p max. This is equivalent to + 10 dBm
for a sine-wave signal. Inputting a signal with a larger
voltage risks damaging the internal circuit