ST112 Tektronix SONET Transmission Test Set

The Tektronix / Microwave Logic ST112 SONET Transmission Test Set is an extensive SONET STSX-1, OC-1, OC-3, OC-12, signal analyzer and generator for tributary and network testing. DSX-1 ans DSX-3 Asynchronous Cross Connect Testing capabilities can be used independently or integrated with SONET testing capabilities. Designed for both field and lab use, the Test Set extends SONET Testing Technology by delivering a clear channel STS-3c and STS-12c concatenated mappings in addition to the standard DS# and VT1.5 mappings.

• OC-1/3/3c/12/12c Framing and Payload per Bellcore and ANSI Specifications
• Complete Overhead and Bit Error Rate Testing (BERT)
• Extended Control and Measurement Display via VT100 and RS-232 Support
• STS-3c/12c, DS3 and VT1.5 Payload Mappings
• User-upgradeable Software
• Unique VT1.5 Channel Scan and SONET Trouble Scan
• Standalone DS1/3 Test Capability
• Six DSX-3 or Six STSX-1 and Four DSX-1 Outputs
• Quick Setup for Automatic Configuration of Standard Test Modes
• AutoSeek (Automatic Detection of Receive Signal) and AutoLink (Receiver Follows Transmitter)
• Full SPE and VT Pointer Control
• Multiple Electrical Outputs for Four DS1, Six DS3/STSX-1
• Access to All SONET Overhead Bytes
• Data Communications Channel (DCC) Add/Drop
• Multiple Simultaneous Timed Alarms and Errors (for Software Regression Testing and Other Applications)

While its portable, lightweight transceiver design makes the ST112 an ideal SONET test set, its extensive DSX-1 and DSX-3 test capabilities also provide outstanding network payload drop tests. At less than 22 pounds, the ST112 is the single-unit solution for all SONET testing where portability and ease-of-use are important. Standard RS-232, GPIB and parallel printer interfaces, as well as VT100 terminal capability, provide the ST112 with complete remote control, display and printed report features.

The following features make the ST112 simple to use:
• Front-panel LEDs provide instantaneous identification of the operational status and alarms
• Built-in LCD screen displays test menus and results
• AutoLink feature automatically resets receiver to match user-updated transmitter settings
• VT100 terminal interface allows easy remote access to extended menus
• Interruptible pause/resume aids completion of long test cycles

The ST112's SONET capabilities include not only optical carrier generation, but also STS-3c/12c, DS3 and VT1.5 payload generation.

• Event sync (Opt. 07) provides output signals for deriving switch timing or propagation delay from alarm conditions
• Byte synchronous payload mapping for next generation DLC testing
• Full error and alarm generation
• The ST112 Receiver analyzes the incoming optical signal and displays performance-monitoring information for the optical signal and payloads

The ST112 has been carefully engineered to enable the user to work smarter, not harder. For example, the ST112 Receiver has a unique, time-saving feature called STS TroubleScan, which systematically scans the entire input signal and displays any detected errors and alarms on all payload envelopes.

• SONET Network Element Testing
• Loopback Testing
• End-to-End Testing and Monitoring
• Path Provisioning and Performance Monitoring
• Software Regression Testing