Series 7000 Channel Replicator

Eastern OptX Series 7000 System is a multi-radio test network which replicates the propagation path of real-world applications. The system allows the user to test a variety of Air Interfaces using the same system without modification and at the same time. This is not a signal emulator. The systems use low-loss fiber optic cable to create the propagation delay associated with radio transmissions from 1 to 5000 MHz. Multiple radios may be connected to the network which allows for full duplex operation. Each radio may operate using a different or identical Air Interface. The delays between radios may be fixed or variable and optional amplitude control provides the appropriate propagation loss. The Series 7000 creates a test range right in your lab. It can be used as a design aid and as a test tool for new modulation and encryption schemes prior to expensive field testing.

Standard System Features
• 2 to 10 Radio Ports
• Radio to Radio distances from 1 to 50,000 m
• Delay Configurations: Discrete, Progressive, or Combined Discrete and Progressive.
• Multi-path Replicator Option
• Amplitude Control – Optical and/or RF
• Remote Control Interface
• Front Panel LCD Touch Screen Control
• External Delay Option for Future Expansion
• Octave Input Bandwidth (Multi-Octave systems available with automatic input frequency selector)
• Single or Multiple Air Interfaces may be tested simultaneously.
• Doppler Option (Moving Target)
• Interferer Injection (Jammer)

System Description
A simple, two-radio system with a 600 microsecond delay is shown in Figure 1. The system consists of two bi-directional optical modulator / demodulator and a fiber optic delay. The delay may be fixed or variable and a variable attenuator may be added to replicate propagation loss. A radio is connected to ether end of the system and may transmit and receive simultaneously. Figure 2 shows the modulator / demodulator detail. The optical system is broad band (up to 18 GHz). The system bandwidth is limited by the input circulator (typically 1 octave).

Applications
• Multi-Radio test network that replicates the propagation path of real-world applications
• Multiple radios may be connected to the network, which allows for full duplex operation
• Delays between radios may be fixed or variable, and optional amplitude control provides the appropriate propagation loss
• Doppler Option (Moving Target)

Series 7000 Geographical Area Replication – including Multipath and Moving Target Generation

8 Radio Channel Replicator 150 nM Delays

8 Radio Series Node Air Interface Tester Diagram