VME RF Modem

VME RF Modem Card

Description

The VME RF Modem Card consists of three independent RF modem channels with a common VME bus interface. The VME slave interface logic is ported on FPGA. Each channel provides a 16 Tone QPSK modulation for radio communication. Each channel consists of SHARC DSP processor which implements modem algorithm and a sound port Codec, which interfaces to radio.

Specifications

Host Interface	VME Slave
Number of channels	Three, shared on common host interface
Each Channel contains	.
Processor	ADSP21060 @ 40 MHz
Memory	1MB boot Flash
Analog input	-20dbm to +3dbm, 50 to 600Ω Transformer coupled
Analog output	-20dbm to 0dbm, 50 to 600Ω Balanced, Transformer coupled
CODEC	20 KHz bandwidth, linear PCM, 16 bit, Sampling frequencies of 7040Hz and 10224 Hz
Serial I/O	3 wire, Asynchronous RS232C serial port for host connectivity in standalone mode.
H/W Reset	Front panel switch
LEDs	Two LEDs to indicate 1.Channel is active, 2.PTT is on
Power Supply	5V - 2.5A, +12V -0.25A
Board size	Double Euro 6U

Applications

Audio processing
RF modem communication