|
The SE-4257 Flight Telemetry RF Exciter & Test Signal Simulator combines a state-of-the-art high data rate digital wideband waveform modulator with a high performance radio frequency (RF) upconverter to produce transmission-ready signals in the Baseband, Upper L-, Lower L-, and both Transmit and Receive S-Band frequency bands. An advanced, digital implementation provides for the small form and fit while fully satisfying applications requiring ruggedized packaging, minimum power consumption, and high spectral purity. The design supports all ARTM waveforms including Tier 0 (PCM/FM), Tier I (SOQPSK) and Tier II (Multi-h CPM) as well as a multitude of complex digital modulation formats.
Data generation, coding, and modulation can be driven from a variety of external digital inputs or via internal pattern and waveform generation sources. Dual data processing paths are included to allow creation of independent I and Q data coding.
A single SE-4257 can replace a BERT, waveform generator, vector modulator, upconverter, amplifier, noise source, attenuators, power meter, spectrum analyzer and a frequency converter. Combining these capabilities in one small, simple-to-use unit allows quick and accurate setup and testing without in-depth system knowledge.
The practical design of the SE-4257 Exciter also supports link test and verification applications by providing dual channel bit-error-rate testing functions as well as simulated noise insertion for ground station loopback testing.
An optional second, independently tunable modulated RF output may be used effectively with dual-polarized systems. Output power levels are adjustable from +10 dBm to -80 dBm in 0.1 dB steps for fine control and fade profiling.
Configurable front panel BNC connectors provide ready access to internal operating signals. The SE-4257 can also optionally support an external frequency reference.
The SE-4257 includes support for user-configurable Doppler simulation and acquisition automation functions. Additionally, up to 32 Configuration Profiles can be stored with user-defined link names and recalled with a single command.
The firmware-intensive implementation of the SE-4257 readily accommodates custom features and signal processing tasks. Using the latest generation digital signal processing techniques allows upgrades via firmware changes, even for previously fielded systems.
The SE-4257 RF Exciter is implemented in an industry standard 19 inch rack mountable chassis and provides full status and control capabilities. Controllable selections include modulation modes, data encoding options, RF output frequencies and levels, etc. and are accessible via a front-panel display or remotely via a standard RS-232 serial and 10/100baseT Ethernet or optional GPIB interface.
|
