Aeroflex 2852/S & 2853/S Digital Analyzers - AEROFLEX - #9

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For the very latest specifications visit www.aeroflex.com AIS ON indicates signal is all 1’s. All 1’s is defined as signal with less than three zeros in two frame periods. FRAME ON indicates a loss of frame alignment. ERRORS ON indicates that the error rate of the major error type is greater than a threshold set by the user. Threshold is 1x10-9 to 9x10-3. MF/ZEROS ON indicates: Loss of multiframe alignment (2048 kbit/s) More than 31 consecutive zeros have been received (1544 kbit/s). DIST/YELLOW ON indicates: Distant alarm (2048 kbit/s) Yellow alarm (1544 kbit/s) DMF/ ON indicates: Distant multiframe alarm (2048 kbit/s) ISDN error report alarm (2048 kbit/s systems for ISDN applications). PATTERN ON indicates loss of pattern synchronization. REMOTE ON indicates the instrument is under remote control and the keyboard is inoperative. RX: CRC UNSYNC The loss of CRC synchronisation is indicated by a message on the display. C-BIT: UNSYNC Loss of C-Bit framing sequence synchronization. ALARM EXTENSION An output is provided corresponding to an alarm condition. Polarity Positive for alarm. Interface TTL. ERRORS OUTPUT An output pulse is provided for each code error, pattern error, frame error, or CRC error (as selected to be the major measurement - see measurements section). (Pin 16 of auxiliary connector). Interface TTL. Pulse Width 50% of bit interval. UNASSIGNED FRAMING BITS The state of the unassigned bits is displayed. ISDN ERROR REPORT BITS (to ITU-T Rec. G.962) Applies to 2048 kbit/s CRC system with no signaling multiframe, to G.704. Bits monitored Bits 4, 5, 6, 7 and 8 in Not Frame Word. Function Detects, displays and Autoprints occurrence of valid error alarm pulses within bits 6, 7 and 8 corresponding to Severely Errored Seconds, Degraded Minutes and Errored Seconds, and their relation to the CRC multiframe, in frame pairs. Alarm pulses can be latched. Bits 4 and 5 are displayed. Changes in the state of bit 5 are Autoprinted. ISDN ERROR REPORT BITS Applies to 2048 kbit/s system with no signaling multiframe, to G.704. Bits monitored Bits 4, 5, 6, 7 and 8 in Not Frame Word. Function Detects, displays and Autoprints occurrence of valid error alarm pulses within bits 6, 7 and 8 corresponding to Severely Errored Seconds, Degraded Minutes and Errored Seconds. Four sets of bits 6, 7 and 8 are displayed corresponding to the four combinations of bits 4 and 5 (00, 01, 10 and 11, each of which exists for 250 ms each second). SYNC OUTPUTS PRBS. Polarity Negative pulse. Interface TTL. DATA TEST INTERFACE X.21 (X.24), RS-449 (V.36), V.35 and RS-232 2853 and 2853S only. X.21(X.24), RS-449 (V.36), V.35 X.21 (V.11), RS-449 (V.11) and V.35 circuits are presented to a common connector. DTE interfaces are provided by supplied cables which provide the appropriate connector and electrical interface. A series of optional cables provide alternative combinations of V.10, DTE and DCE. Codirectional, Contradirectional and EUROCOM D/1 (2850B, 2850BS, 2851 and 2851S) Codirectional Contradirectional EUROCOM D/1 Line Signal To ITU-T Rec. G.703 To Rec.ITU-T G.703 TO EUROCOM D/1, IB6 Coding Level Bit Rate 64 kbit/s 64 kbit/s 32, 64, 128, 256, 512, 1024, 2048 kbit/s Format Unstructured Unstructured Unstructured Transmit Timing Internal Contradirectional Input Internal Receiver Receiver Receiver External 2048 kbit/s Internal External (EUROCOM) External 2048 kbit/s Transmit Timing TTL at 64 kHz TTL at 64 kHz TTL at bit rate Output Receive Timing Receiver Receiver Receiver Contradirectional Input EUROCOM Connector 15 way D-Type, 15 way D-Type, 15 way D-Type, ISO 4903 ISO 4903 ISO 4903