Telecommunications
2854S/2855S
Testability from data communications interfaces to high speed digi-tal links and multiplexes at 2, 8, 34, and 140 Mbit/s in a single
portable and battery operated unit provides unrivalled flexibility forsupport of modern digital and data networks and equipment. The2854S Digital Transmission Analyzer provides most of this function-
ality but limits the data test capability to Codirectional and Contra-directional interfaces.This Data Sheet, therefore, contains only those capabilities andspecifications which are incremental to 2850B and 2851.
Digital testers for PCM and data applications up to 140 Mbit/s including mux/demux
PCM Framing Systems 2854S and 2855S are able to generate and receive all commonly usedframing systems up to 140 Mbit/s for the European digital hierarchy.North American rates are also available to 6 Mbit/s.The instrument can be optioned as European or hybrid versions, andthis includes a mixed rate version (European plus North American).Thus 2854S and 2855S have the flexibility to address global applica-tions, including operation in International Gateways where there is arequirement to test mixtures of European and North American traf-
fic carried on satellite systems. •PCM and data pattern generatoranderrordetectorfrom 50 bit/s to140 Mbit/s•Demultiplexand hierarchical errors andalarms monitoring•Generate and monitortest patterns,framed orunframed, at all hierarchical
levels within 8, 34and 140 Mbit/s signals•All data test interfaces as standard: RS-232, X.21(X.24), V.35, RS-449 (V.36)
(2855S), codirectional, contradirectional
with EUROCOM optional (2854S and
2855S)•DS3and LVDS test interface accessories•Data interface and analog channelaccess•G.821, G.921, G.826, M.2100 and G.962analysis•Measurements include propagationdelay, frequencydeviation, frequencyand
level measuring, DTMFand CAS•DC powerand internal batteryoptions•Remote control via RS-232orIEEE-488with optional PC applications software•2850B and 2851full functionality 56 kbit/s and 64kbit/s Channel Testing Individual channels within T1, 704, 2048, 8448 (G.704/G.744 andG.742), 34368 and 139264 kbit/s can be tested at 64 or 56 kbit/s,assisting in testing and fault location within digital data networks and
cross-connect switches. n x64kbit/s Channel Testing The expanding services at n × × 64 kbit/s can be tested where they arecarried within T1, 704, 2048, 8448, 34368 and 139264 kbit/s digital
signals. All systems and n 64 kbit/s cross connect switches arecatered for with the flexibility of contiguous and non-contiguouschannel selection. The 2855SDigital Communications Analyzerextends the capabilities ofthe 285Xseries ofanalyzers to include support ofthe latest serviceofferings from PTTs world-wide. Forthe verylatestspecifications visit
www.aeroflex.com