Symmetricom 1100 用户手册
097-58001-02 Revision G – April 2008
TimeProvider User’s Guide
39
Chapter 1 Overview of the TimeProvider
Clock Performance
Clock Performance
Two IOCs are available:
A Rubidium-based version that meets ST2/Type II standards. This IOC meets or
exceeds the ST2 requirements in ANSI T1.101 and Telcordia GR-1244, as well
as the ITU-T G.812 Type II specification.
exceeds the ST2 requirements in ANSI T1.101 and Telcordia GR-1244, as well
as the ITU-T G.812 Type II specification.
A Quartz-based version that meets ST3E/Type I standards. This IOC meets or
exceeds the ST3E requirements in ANSI T1.101 and Telcordia GR-1244, as well
as the ITU-T G.812 TYPE III specification and ITU-T G.812 Type I specification.
exceeds the ST3E requirements in ANSI T1.101 and Telcordia GR-1244, as well
as the ITU-T G.812 TYPE III specification and ITU-T G.812 Type I specification.
Output Signals
The main shelf has 32 output connections arranged in four groups of eight outputs;
each group is labeled A through D. The optional Expansion Panel also has four
groups of eight outputs that correspond to each group in the main shelf; using the
Expansion Panel, the TimeProvider supports up to 64 outputs. The outputs are
“universal:” you can select from E1, 2.048 MHz, T1, 8 kHz, CC, JCC, JCC4, 1.544
MHz, and 6.312 MHz. You can provision E1 and T1 signals with standard framing
and G.703 formats. Additionally, TIA/EIA B-422 (1.544 and 2.048 MHz) output
signals are available using the TIA/EIA B-422 Output module; this module can be
installed only in the main shelf and cannot be installed in the Expansion panel.
each group is labeled A through D. The optional Expansion Panel also has four
groups of eight outputs that correspond to each group in the main shelf; using the
Expansion Panel, the TimeProvider supports up to 64 outputs. The outputs are
“universal:” you can select from E1, 2.048 MHz, T1, 8 kHz, CC, JCC, JCC4, 1.544
MHz, and 6.312 MHz. You can provision E1 and T1 signals with standard framing
and G.703 formats. Additionally, TIA/EIA B-422 (1.544 and 2.048 MHz) output
signals are available using the TIA/EIA B-422 Output module; this module can be
installed only in the main shelf and cannot be installed in the Expansion panel.
The output types provisioned in each group of the Master shelf are automatically
provisioned in the corresponding group of the Expansion panel and cannot be
configured differently.
provisioned in the corresponding group of the Expansion panel and cannot be
configured differently.
When you install a Retimer module or a TIA/EIA B-422 Output module in a main
shelf output group, then you can provision the corresponding group in the
Expansion panel to any desired output type.
shelf output group, then you can provision the corresponding group in the
Expansion panel to any desired output type.
The TimeProvider uses interchangeable Output modules, allowing you to select the
connector and termination impedance. Output modules are available with the
following connectors and output impedance:
connector and termination impedance. Output modules are available with the
following connectors and output impedance:
BNC – 75
Ω
DB9 (4 connectors, 2 outputs per connector) – 120
Ω
DB9 (8 connectors, 1 output per connector) – 120
Ω
Metric (Siemens) 1.6/5.6 – 75
Ω
Metric (Siemens) 1.0/2.3 – 75
Ω
Wirewrap – 100
Ω/133Ω
BT43 – 75
Ω
TIA/EIA B-422 Wirewrap – 100
Ω (installed in main shelf only)