Aeroflex 2854S/2855S Digital Analyzers - AEROFLEX - #2

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Tributary Testing 2048 kbit/s tributaries within 8448 kbit/s digital signals, 2048 and 8448 kbit/s tributaries within 34368 kbit/s digital signals, and 2048, 8448 and 34368 kbit/s tributaries within 139264 kbit/s digital signals, can be tested to ensure correct functioning of multiplexes. Unstructured Where the structures on digital links do not conform to the usual CCITT Recommendations, for example inter-computer links, tests can be performed using an unframed format. DATA INTERFACE TESTING All commonly used data interfaces are provided as standard to give a comprehensive data test capability together with primary, second, third and fourth order PCM rate testing. Thus PCM and data circuits and equipment can be tested with one compact, fully integrated test instrument, from 50 bit/s to 140 Mbit/s. Data test interfaces provided are RS-232, X.21, RS-449 (V.36), V.35 (2855S), codirectional and contradirectional (2854S and 2855S). DTE is standard, DCE optional. Modes Both synchronous and asynchronous modes are possible with a wide range of standard and user programmable data rates, so that traditional data interface testing can be addressed together with modern digital data services at 64 kbit/s, n × 64 kbit/s and other rates. DS3 INTERFACE TESTING The DS3 POD enables unframed BER testing on DS3 interfaces at 44.736 Mbit/s. LVDS INTERFACE TESTING The TTL to LVDS converter accessory enables BER testing on LVDS interfaces at rates from 6 to 50 Mbit/s. IN-SERVICE AND OUT-OF-SERVICE MEASUREMENTS 2854S and 2855S are equally suited to both installation and in-service maintenance measurements at rates up to 140 Mbit/s. Interfaces are provided to enable the receiver to be connected to a number of network points at varying impedances and signal sensitivities, including the provision of automatic equalisation (automatic line build out, ALBO) at 2048 kbit/s. DEMULTIPLEX MONITORING Comprehensive and flexible in-service monitoring is provided to enable simultaneous measurement of framing and CRC errors for a complete demultiplex path for 8448, 34368 and 139264 kbit/s signals. At the same time selected 64 kbit/s or n × 64 kbit/s channels, or 2048, 8448 or 34368 kbit/s tributaries, can be monitored for pattern errors, whilst analog channels can be monitored using the loudspeaker. Both Channel Associated and DTMF Signaling can be monitored within selected 2048 kbit/s tributaries, and alarms are monitored for the full demultiplex path. CHANNEL ACCESS Digital access is provided to transmit and receive timeslots in 704, 2048, 1544 and 8448 kbit/s (G.744) digital signals, or to 2048 kbit/s tributaries within 8448, 34368 and 139264 kbit/s digital signals. Analog access is possible only at 1544 and 2048 kbit/s, or within 2048 tributaries of 8448, 34368 and 139264 kbit/s signals. Drop and Insert In addition to checking error performance of selected 64 kbit/s and n × 64 kbit/s channels with transmitter and receiver operating independently, a Drop and Insert configuration can be adopted for 704, 2048 and 1544 kbit/s systems so that 64 kbit/s and n × 64 kbit/s channels can be tested with minimum disruption of service to other intraffic channels. External Access Access is provided on front panel connectors to selected transmit and receive channels, at both analog and digital levels, for first, second, third and fourth order digital signals. Thus, if required, external analog or digital test equipment can be connected to make specific channel measurements beyond the capability of 2854S and 2855S. TERMINAL EQUIPMENTTESTING 2854S and 2855S are able to simulate and detect alarm conditions associated with the various framing systems, so that terminal equipment can be tested for correct operation. This includes the ability to generate programmable Frame or Code Errors to check equipment thresholds. It is also possible to test across multiplexes by inserting and monitoring test patterns within 2048, 8448 and 34368 kbit/s tributaries. In addition, there are automatic test sequences for checking Frame and Multiframe Alignment Strategy, and access is allowed to control and display the condition of all unassigned frame bits. RS-232 REMOTE OPERATION Remote unattended operation can be accomplished via an RS-232 port, which can also be used for local printing. Keyboard functions can be duplicated via RS-232 enabling complete remote reconfiguration and reporting of results. IEEE-488 (GPIB) IEEE-488 can be specified as an option in addition to the standard RS-232 for factory test and laboratory applications or where IEEE- 488 is preferred. POWER OPTIONS In addition to mains power, options are provided for battery and DC power to cater for all operational requirements including factory, exchange and field. SPECIFICATION PCM TRANSMIT INTERFACE FRAMING AND BIT RATES As 2850B, 2851 PLUS 34368 kbit/s - G.751 asynchronous 139264 kbit/s - G.751 asynchronous Permitted combinations of bit rates 2048 & 8448 & 34368 & 139264 kbit/s or 704 & 2048 & 8448 & 34368 & 139264 kbit/s or 1544 & 2048 & 8448 & 34368 & 139264 kbit/s or 704 & 2048 & 8448 & 1544 & 3152 & 6312 & 34368 & 139264 kbit/s.