Anritsu MT1810A - When Inputting Jitter-Modulated Signals

Chapter 4 Window Operations
4-18
4.4.2 When inputting jitter-modulated signals
•
When executing jitter tolerance test, etc. by inputting jitter-modulated
clock, set
Jitter Input
of Delay to
ON
to avoid malfunction of Delay
caused by excess jitter modulation. (Refer to
Figure 4.4.2-1.) When
using the MU181000A/B (with Option 001 Jitter Modulation) or
MU181500B, set
Jitter Input
of Delay to
ON
, and then set
Jitter
Modulation
of the MU181000A/B or MU181500B to
ON
.
•
When executing Calibration of Delay, set jitter modulation of input
signal to non-modulation.
Figure 4.4.2-1 Clock delay setting items
Notes:
•
When jitter-modulated clock is input while
Jitter Input
of Delay
is set to
OFF,
the phase may become unstable.
•
The Delay lamp may light up when a jitter-modulated clock
signal is input. In addition, phase setting error may increase.
•
The Delay function has feedback process to improve its setting
accuracy at default setting (
Jitter Input
is set to
OFF
.).
However, if
Jitter Input
is set to
ON
, the setting accuracy is
lowered because the feedback process is stopped.
Table 4.4.2-1 Jitter Input setting and use
Jitter Input Use
ON
Jitter Tolerance Measurement
BER measurement when jitter amount applied to clock
signal is big.
(Delay is unstable when Jitter Input is OFF.)
OFF
Phase margin measurement
Eye Margin measurement,
Eye Diagram measurement,
Bathtub measurement