The Tektronix CTS850 is a comprehensive telecommunications test set designed for installation, commissioning, and maintenance of SDH and PDH transmission systems. It supports transmission rates ranging from E1 (2.048 Mb/s) up to STM-4 (622.08 Mb/s), providing extensive electrical and optical physical interface options alongside jitter, wander, and comprehensive protocol analysis capabilities.
Specifications
General
| Parameter | Value |
|---|---|
| Interfaces | GPIB (IEEE-488.2), RS-232-C, Centronics Parallel Printer Port |
| Display | Built-in Color LCD |
Physical
| Parameter | Value |
|---|---|
| Power Supply | 90 to 260 V AC, 47 to 63 Hz |
| Operating Temperature | 5 °C to 40 °C |
Telecom and Transmission Testing
| Parameter | Value |
|---|---|
| Supported Physical Line Standards | SDH (ITU-T G.707), PDH (ITU-T G.703) |
| Supported Data Rates | 2.048 Mb/s (E1), 8.448 Mb/s (E2), 34.368 Mb/s (E3), 139.264 Mb/s (E4), 155.52 Mb/s (STM-1), 622.08 Mb/s (STM-4) |
| Optical Transmitter Wavelengths | 1310 nm, 1550 nm (option dependent) |
| Line Coding Formats | HDB3 (2, 8, 34 Mb/s), CMI (140, 155 Mb/s) |
| Bit Error Rate (BER) Test Patterns | PRBS 2^9-1, 2^11-1, 2^15-1, 2^20-1, 2^23-1, 2^31-1 |
| SDH Mapping Support | ITU-T G.707 mapping of PDH tributaries (E1, E2, E3, E4) into SDH containers |
| PDH Electrical TX Output Impedance | 75 Ω unbalanced (BNC), 120 Ω balanced (interface option dependent) |
| PDH Electrical RX Input Impedance | 75 Ω unbalanced (BNC), 120 Ω balanced (interface option dependent) |
| Jitter and Wander Testing | Supported (option dependent) |
| Alarm Generation | LOS, LOF, LOP, MS-AIS, MS-RDI, AU-AIS, AU-LOP, HP-UNEQ, TU-AIS, TU-LOP, TU-LOM |
| Error Insertion Capability | FAS, Bit, parity, and overhead errors (single or continuous rate) |
| Overhead Byte Access | Full access to SDH Section Overhead (SOH) and Path Overhead (POH) |
Physical Interfaces and Connections
| Parameter | Value |
|---|---|
| STM-1e Coaxial Interface | 75 Ω unbalanced, BNC connector |
| E1 Interface Connectors | 75 Ω BNC unbalanced, 120 Ω balanced (Siemens or RJ-45 dependent on option) |
| E2, E3, E4 Interface Connectors | 75 Ω BNC unbalanced |
| External Reference Clock Input | 2.048 MHz / 2.048 Mb/s, BNC connector |
| External Reference Clock Output | 2.048 MHz / 2.048 Mb/s, BNC connector |
| Storage Drive | Built-in 3.5-inch floppy disk drive |
Environmental and Compliance
| Parameter | Value |
|---|---|
| Measurement Analysis Standards | ITU-T G.821, G.826, M.2100 |
Physical and Mechanical
| Parameter | Value |
|---|---|
| Form Factor | Portable, benchtop instrument with integrated carrying handle |
Environmental
| Parameter | Value |
|---|---|
| Storage Temperature | -20 °C to +60 °C |
| Operating Humidity | 20% to 80% RH (non-condensing) |
Compliance & Safety
| Parameter | Value |
|---|---|
| Laser Safety | Class 1 (IEC 60825-1) |
Interfaces
| Parameter | Value |
|---|---|
| Optical Connector Options | FC/PC, SC/PC, ST/PC |
Technology
SDH / PDH Transmission Testing
Applications
Installation, commissioning, and maintenance of digital transmission networks
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