4 – Configuration & Operation
NetXpress LX & CM-30 Installation & Operation Manual
Version 1, September 2010
Harris Corporation
4-31
Intraplex Products
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Current Timing Status
Current source:
The timing source the system currently uses. If both the primary and secondary
timing sources have failed, the system operates on its internal clock.
Primary Timing Source Status:
The current operational status (
Up
or
Down
) of the primary timing
source.
VCXO calibration value:
Timing calibration value (in ppm) for the voltage controlled crystal oscillator
(factory calibration only).
PLL Lock Status:
The Phase-Locked Loop status (
Locked
or
Unlocked
) indicates when the
NetXpress LX system is operating synchronously with the current timing source. The status is
Unlocked
when both the primary and secondary timing sources are unavailable, so this NetXpress LX
system is running asynchronously.
Secondary source:
The current operational status (up, down) of the secondary timing source.
Timing configuration
Primary source:
The primary timing source for the NetXpress LX shelf. Timing choices are
Internal
,
External
,
Stream
, or
SynchroCast
.
Internal
can only be chosen as the
Primary
Timing
Source
for a single NetXpress LX system within
your network. All remaining NetXpress LX systems can derive that same timing source using
Stream
or E1/T1 timing.
Multiple systems can be set to
External
Timing
if a common source of external timing is available at
all locations. This is typically a satellite (GPS) derived clock or a public telecom network clock source.
External timing must be cabled into the NetXpress LX system using the TIMING IN jack on the MA-230
module adapter.
Streams must be placed out-of-service to change the primary or secondary timing source selection.
SynchroCast
is a valid choice for timing only if you have an SNC-101T module installed in the
NetXpress LX system. If you select SynchroCast3 timing as the primary timing source, you cannot
select
External
as the secondary timing source.
Primary receive stream:
If the primary timing source is set to
Stream
, this field shows the stream
name to use as the timing source.
Primary stream network type:
The network quality to be applied for clock recovery from the
primary stream (
Dedicated
,
Metro
,
Continental
).
Secondary source:
The secondary timing source for the NetXpress LX shelf. Choices are
Internal
,
External
, or
Stream
. The secondary timing source cannot be the same as the primary timing source
except in the case of
Stream
, but even then the selected streams must be unique.
Secondary receive stream:
If the secondary timing source is set to
Stream
, this field shows the
stream name to use as the timing source.
Secondary stream network type:
The network quality to be applied for clock recovery from the
secondary stream (
Dedicated
,
Metro
,
Continental
).
Reset:
Click this button to reverse all changes to this page.
Submit:
Click this button to apply all system timing information entries on this page.
4.3.3.6 Software Images Configuration
When the NetXpress LX system first starts up, the CM-30 module attempts to load its operating
system from the
Primary
Image
Filename
along with its associated
Primary
FPGA
Image
