VCEU VME Command Encoder Unit | A Silver Engineering Product

Generate Analog and Digital BPSK uses by STDN applications
Generate AM/FSK used by SGLS applications
Generate Data and Clock digital outputs for STND
Receive, correlate, and buffer Data and Clock digital inputs
Generate Ternary digital outputs for SGLS (1,0,S, CLK)
Receive, correlate, and buffer Ternary digital inputs (SGLS)
Forward link output buffer of 4K words (8KB) minimum
Forward link input buffer of 4K words (8KB) minimum
Provisions for KG61 interface
Provisions for KIT223A interface
Automatically inserts 0 to 216 bits of minimum idle data between commands
Provide programmable STDN idle data, all 1's, all 0's, or alternating 1's and 0's
Provide programmable SGLS idle data, 1,0,S, NULL
Provide programmable command rates
Provide audio output during commanding sequence
Provide spare RS422 inputs and outputs via main FPGA
Provide spare 50ohm TTL inputs and outputs via main FPGA
Provide spare open drain transistor outputs via main FPGA
Provide spare interfaces directly to P2 from main FPGA
Interface to VMEbus as A32 D32/D16 slave with interrupter
Provide selectable VMEbus address decode and IRQ select
Designed with a large capacity FPGA for easy
adaptation to custom applications

VCEU Introduction

The VME Command Encoder Unit (VCEU) is our newest Command Encoder product. The VCEU is capable of generating various standard spacecraft command formats. The VCEU incorporates a 400K Xilinx FPGA and a Flash Based FPGA Configuration storage device making the VCEU cards a very programmable hardware architecture. The VCEU card’s rich features and resources allow the card to be used and reused for many applications unrelated to spacecraft command/telemetry links