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10885A PC Axis Board

Product Status:

Obsolete

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Overview and Features
Post-Purchase Upgrades
Resources

HIGHLIGHTS

General

Platform and size: PC-ISA-XT, 98 x 339 mm
Number of Axes per Board: 1
Resolution Extension: x32
External Sample Inputs: 1

Operation with Plane Mirror Optics

Resolution: 4.9 nm
Maximum Velocity (also limited by laser head): 460 mm/sec

Timing

Position Data Update Rate: 1/Ref Freq
External Sample Uncertainty: ± 1/Ref Freq

Special Features

32-bit, 2´s Complement Hardware Position Output
32-bit Programming API available for Windows 9x, NT, 2000, XP

The Keysight 10885A PC axis board, a register-programmed position axis board, is ideal for making open-loop measurements and for providing position data for custom closed-loop servo electronics. It provides a 32-bit position word (in fractions of a wavelength) that is readable over a PC backplane and is also available from a real-time hardware output.

PC Backplane Position Output
Data Format:
Units: fractions of a wavelength
32 bits (4 bytes)
2's Complement
Positive Logic
Least Significant Bit (one count) equals resolution
Typical Data Update Rate Over Backplane (Compiled Quick Basic Program):
80286 @ 8 MHz: 58 kHz
80386 @ 25 MHz: 74 kHz
80486 @ 25 MHz: 105 kHz
Data Age and Sample Ambiguity:
After a sample operation, the value in the position register will reflect an actual position that occurred 0.1 to 1.4 us before the sample operation was initiated.
Sample Delay:
The position register may be read 1.5 us after a sample operation.
Connector Position Output
Data Format:
Units: fractions of a wavelength
2's Complement
32-bit parallel binary
Positive Logic
Least Significant Bit (one count) equals resolution
Data Update Rate:
Keysight 5517A: 1.5 - 2.0 MHz
Keysight 5517B: 1.9 - 2.4 MHz
Keysight 5517C: 2.4 - 3.0 MHz
(Hardware included to synchronize to slower clocks.)
Data Age:
Keysight 5517A: 2.1 - 4.1 us
Keysight 5517B: 1.8 - 3.3 us
Keysight 5517C: 1.5 - 2.7 us
Data Age is dependent on the laser head reference signal (split-frequency) and on knowing exactly when, in relation to the rising edge of the Error Clock, the Position Error lines are sampled. Call this time deltaT.
Data Age =
0.34 us + deltaT us + ((4.0 +/- 0.5) / (Reference (in MHz))) us
Additionally, the Data Age may vary up to 0.1 us typically and up to 0.25 us in a worst case situation as a result of the Reference frequency varying over time.
Power Requirements (typical)
5 Vdc at 1.6 A
+/-12 Vdc at 0.015 A
Weight
0.30 kg (0.65 lb)
Operating Temperature
0 - 40 degrees C (32 - 104 degrees F)
ISA Compatibility
Standard XT-size board which supports 8-bit bus transfers
DOS programming environment saves development time
Eight-bit bus transfers provide compatibility with standard software programs
Included software programs provide fast setup and data gathering
Integrated board functions reduce system size, cost, and complexity
High reliability backed by three-year warranty

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