RPI20并行接口
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 The RLE system directly produces a 1 Vpp sine / cosine output with signal periods of 316 nm and 158 nm from single and double pass interferometers respectively. The RPI20 interface processes these signals to provide ultra-high resolution positional feedback in parallel word format.
Features and benefits
- 4096x interpolation
- Analogue input bandwidth of <6.5 MHz
- 36-bit parallel format output
- Up to seven axis capability on one bus
- Switch selectable output resolutions
- Addressable registers providing:
-
- Position data
- Card status, inlcluding Liassajous co-ordinates, laser signal strength and system status
- Compact 110 mm x 72 mm board size
- Optional dual axis VME host board to enable to the RPI20 to be used in VME system architectures
Specification
| Resolution |
38.6 picometres (plane mirror system)
77.2 picometres (retroreflector system) |
| Maximum velocity |
1 m/s (plane mirror system)
2 m/s (retroreflector system) |
| Output signal |
36-bit parallel word |
| 
