The IFR Aeroflex 2853S is a digital communications analyzer that generates and detects test patterns across PCM and data communication systems. Operating from 50 bit/s to 34 Mbit/s, it simultaneously demultiplexes and monitors framing errors and alarms at 2, 8, and 34 Mbit/s hierarchies. The instrument functions as both pattern generator and error detector, supporting framed and unframed test patterns across all levels within 8 and 34 Mbit/s signals, including 64 kbit/s and n × 64 kbit/s channels.
Technical Specifications
• Data Rate Range: 50 bit/s to 34 Mbit/s
• Demultiplexing & Monitoring: Simultaneous framing error and alarm detection at 2, 8, and 34 Mbit/s
• Test Pattern Modes: Framed and unframed generation at all hierarchical levels
• Supported Standards: G.821, G.921, M.2100, G.962 analysis
• Framing Systems: European and North American digital hierarchies to 34 Mbit/s
• Common Bit Rates: 704 kbit/s, 1544 kbit/s (T1/T1 ESF/DDS), 2048 kbit/s (G.704 variants), 3152 kbit/s (DS1C), 6312 kbit/s, 8448 kbit/s (G.744), 34368 kbit/s (G.751)
– Key Features
• Data Interfaces: RS-232, X.21, V.35, RS-449 (V.36), RS-530, codirectional, contradirectional, and optional EUROCOM
• Interface Modes: DTE standard; DCE optional
• Remote Loopback: ITU-T V.54 via control lines for automated circuit testing
• Measurements: Propagation delay, frequency deviation, frequency and level measurements, DTMF, and CAS
• Form Factors: Desktop and rack-mountable configurations
• Power Options: DC power and internal battery operation for field deployment
• Remote Control: RS-232 or IEEE-488 interfaces
– Typical Applications
• PCM circuit and equipment validation across 50 bit/s to 34 Mbit/s range
• Framing error and alarm analysis in digital hierarchies
• Pattern generation and error detection in T1, E1, and higher-order signals
• Data interface testing and loopback verification
– Compatibility & Integration
The 2853S interfaces with standard and optional data circuit protocols across North American and European digital hierarchies, enabling end-to-end testing of complex PCM and data communication networks.
