
30
TimeCreator 1000 User’s Guide
097-93100-01 Revision C – February, 2010
Chapter 1 Overview of the TimeCreator 1000
Performance Monitoring
Frequency Mode
– In this operating mode, the system's frequency is tracking
the reference frequency (GPS). In this mode, a user can add a GPS reference to
the TimeCreator 1000 and use the frequency from GPS to meet BSoD
specifications without re-setting the DOCSIS Timestamp and causing a
re-ranging of the cable modems.
Performance Monitoring
Server Status Monitoring
DTI client status log files provide information on client status, oscillator type, and the
server’s cable advance flag and cable advance value.
Phase Measurements
TheTimeCreator 1000 measures phase data. Peak to peak jitter and MTIE results
are calculated for the user. Frame error rate (FER) is also calculated and made
available to the user. It is calculated over a 10-second window.
MTIE Calculations
MTIE is a measure of the relative noisiness of a signal that relates to frequency
offsets and phase transients. The TimeCreator 1000 automatically calculates MTIE
for each enabled input from the most recent 1000 seconds. From this calculation,
you can retrieve MTIE values for 35-second and user-configurable windows. You
can set an alarm threshold for each of these windows; if the MTIE value exceeds
this threshold and the alarm is enabled, the TimeCreator 1000 generates an alarm.
Physical Description
The TimeCreator 1000 consists of a 19-inch (48 cm) rack mount shelf, plug-in
modules, AC power supply cables and
optional
GPS cables, and hardware.
Note:
In Frequency Mode, DTI output and IMC GPS are not in sync.
Note:
23-inch (58.42 cm) rack mounting brackets are also available
as a separately ordered item.