363-206-295
Technical Specifications
Issue 1
December 1997
10-11
‡
The minimum system gain for the DDM-2000 already takes into account aging, temperature, and
manufacturing tolerances as these figures are built into the minimum transmitter power. The
DDM-2000 system gain can, thus, not be directly compared with the DDM-1000 system gain because
the DDM-1000 system gain does not include all of these effects. A similar penalty, called eye margin,
is subtracted from the DDM-1000 loss budget after the value of system gain is determined.
§
Optical path penalty includes effects of dispersion, reflection and jitter that occur on the optical path.
¶
One connector (0.75 dB) on each end is assumed to connect station cable to outside plant.
∗∗
Unallocated margin, or safety margin, is typically specified from 0 dB to 3 dB.
††
If the loss budget is less than 6.0 dB, use low power. Includes a 1.5 dB safety margin.
‡‡
Budget available for both station and transmission cable and splices.
§§
Attenuation and dispersion can be the limiting factors in span length. For OC-3 single-mode fiber
systems, dispersion is not a factor and all applications are attenuation limited. For OC-12 systems,
the maximum distance could be either attenuation limited or dispersion limited. The limits must be
calculated based on both factors and the lesser of the two defines the actual maximum span length.
A rough rule of thumb for attenuation-limited systems is 0.45 dB/km. This estimate includes typical
cable loss (0.4 dB/km) and splice loss (0.2 dB per splice, 11 total splices) associated with single-mode
fiber.
Maximum span length can be calculated more precisely based on particular fiber and splice
characteristics and local engineering rules.
¶¶
Full width at half maximum (FWHM) spectral width.
Содержание DDM-2000 OC-12
Страница 1: ...363 206 295 Issue 1 December 1997 DDM 2000 OC 12 Multiplexer Release 7 0 User Service Manual Volume I ...
Страница 37: ...Tables xxxviii Issue 1 December 1997 A A SONET Overview A 1 SONET Payloads A 18 A 2 SONET Transport Rates A 19 ...
Страница 506: ...INS PROG 8 of 8 Page INS PROG COMMANDS RELATED rtrv eqpt rtrv ne OC 12 DDM 2000 1997 December 1 Issue 11 89 ...
Страница 528: ...RTRV ATTR ALM 2 of 2 Page RTRV ATTR ALM COMMANDS RELATED set attr alm OC 12 DDM 2000 1997 December 1 Issue 11 111 ...
Страница 565: ...RTRV OC3 3 of 3 Page RTRV OC3 COMMANDS RELATED rtrv sync 11 148 1997 December 1 Issue OC 12 DDM 2000 ...
Страница 664: ...SET FEAT 3 of 3 Page SET FEAT COMMANDS RELATED rtrv feat OC 12 DDM 2000 1997 December 1 Issue 11 247 ...
Страница 766: ... Ctl T TOGGLE 2 of 2 Page Ctl T TOGGLE COMMANDS RELATED logout rlgn OC 12 DDM 2000 1997 December 1 Issue 11 349 ...
Страница 847: ...Multiplexer OC 12 DDM 2000 7 Release TARP TOP Manual User Service II Volume 363 206 295 1 Issue 1997 December ...
Страница 867: ...363 206 295 TOP Maintenance and Operation BLANK LEFT INTENTIONALLY PAGE THIS 12 1997 December 1 Issue ...
Страница 1145: ...Order Circuit 363 206 295 NTP 029 1 of 1 Page 1997 December 1 Issue Unused LISTED ORDER IN BELOW ITEMS DO TO GO DETAILS FOR ...
Страница 1146: ...Order Circuit 363 206 295 NTP 030 1 of 1 Page 1997 December 1 Issue Unused LISTED ORDER IN BELOW ITEMS DO TO GO DETAILS FOR ...
Страница 1182: ...Turnup System 363 206 295 NTP 033 1 of 1 Page 1997 December 1 Issue Unused LISTED ORDER IN BELOW ITEMS DO TO GO DETAILS FOR ...
Страница 1243: ...Clearing Trouble 363 206 295 TAP 107 1 of 1 Page 1997 December 1 Issue Unused ...
Страница 1393: ...363 206 295 DLP 513 1 of 1 Page 1997 December 1 Issue Unused ...
Страница 1394: ...363 206 295 DLP 514 1 of 1 Page 1997 December 1 Issue Unused ...
Страница 1456: ...363 206 295 DLP 523 7 of 7 Page 1997 December 1 Issue OC 12 via Access Broadcast Video for Cross connections of Example 4 Figure ...
Страница 1465: ...DLP 525 363 206 295 1997 December 1 Issue 6 of 2 Page Schematic Ring Virtual ATM Sample 1 Figure ...
Страница 1469: ...DLP 525 363 206 295 1997 December 1 Issue 6 of 6 Page Ring Virtual ATM OC 12 DDM 2000 for Cross connections of Example 4 Figure ...
Страница 1565: ...363 206 295 DLP 543 6 of 5 Page 1997 December 1 Issue Network Broadcast Video of Test Transmission 2 Figure ...
Страница 1566: ...DLP 543 363 206 295 1997 December 1 Issue 6 of 6 Page Network Ring Virtual ATM of Test Transmission 3 Figure ...