Cisco Headend System Release 2.5 User Guide
The Reporting Option
4031374 Rev B
135
Understanding the DHCT Delay Value Saturation Report
There are two parts to the DHCT Delay Value Saturation Report:
A graphical representation of the distribution of the various delay values of
DHCTs assigned to each QPSK modulator on the system
Note: Read Graphical Distribution of DHCT Delay Values (on page 135) for
help in interpreting the graphical representation.
DHCTs assigned to each QPSK modulator on the system
Note: Read Graphical Distribution of DHCT Delay Values (on page 135) for
help in interpreting the graphical representation.
A numerical analysis of the graphical representation of the various delay values
of DHCTs assigned to each QPSK modulator on the system
Note: Read Delay Value Analysis (on page 136) for help in interpreting the
graphical representation.
of DHCTs assigned to each QPSK modulator on the system
Note: Read Delay Value Analysis (on page 136) for help in interpreting the
graphical representation.
Graphical Distribution of DHCT Delay Values
The first part of the DHCT Delay Value Saturation Report contains a graph that
shows the distribution of the various delay values of DHCTs assigned to a specific
QPSK modulator. In the following example, the modulator is QPSKMOD1. The
horizontal axis of the graph plots units of time in microseconds (ms); the vertical axis
(not marked on the report) plots the relative number of DHCTs with each delay
value.
shows the distribution of the various delay values of DHCTs assigned to a specific
QPSK modulator. In the following example, the modulator is QPSKMOD1. The
horizontal axis of the graph plots units of time in microseconds (ms); the vertical axis
(not marked on the report) plots the relative number of DHCTs with each delay
value.
The data in this graph shows that the QPSK called QPSKMOD1 supports two
distinct clusters of DHCTs. The first cluster of DHCTs is located close to the
headend, as confirmed by the Close to Headend label along the x-axis. These
DHCTs have a delay value centered around 700 ms.
distinct clusters of DHCTs. The first cluster of DHCTs is located close to the
headend, as confirmed by the Close to Headend label along the x-axis. These
DHCTs have a delay value centered around 700 ms.
The second cluster of DHCTs is located farther from the headend, as confirmed by
the Far from Headend but Within Range label along the x-axis. These DHCTs have
a delay value centered around 400 ms.
the Far from Headend but Within Range label along the x-axis. These DHCTs have
a delay value centered around 400 ms.