Sameer - centre for electromagnetics manufactures two-channel cdma receiver that consists of a front-end converter, a digital demodulator, and mil-1553 controller. The front-end converter receives rf signal in the selected frequency range and down converts to appropriate if. The base band signal is demodulated and digitized using a 4-bit a/d converter. The digitized output is given to the digital correlator for de-spreading data. Gold code of 127-bit length is used in the digital correlator for data extraction. The de-spread data is given to the mil-1553 controller for further processing and data transmission through mil bus and rs 422 port. Features: high dynamic range; low s/n performance; ber better than 1x10?6; health monitoring by local and remote mode; low locking time - cold start time; <2.5 sec, warm start time; <300 msec, reacquisition time: <50 msec; wide temperature performance.
