LA100 Firmware Version History

v3.4
User programmable tone bursts; FSK decoding improved.
v3.5
LA101 keyboard test.
v4.0
- Major update
Tolerence testing introduced. Every test segment may be given its own measurement level.
v4.1
- Moderate update
Repeating frequency sweeps and improved tone burst accuracy.
v4.2
- Minor update
Automatic selection of tolerance by LA101 using ± segment.
v4.3
New RR? remote command to read results.
v4.4
- Significant update
Real-time display of phase, phase jitter and stereo level.
v4.5
Printable wide frequency response graphs, new remote commands and faster graph updating.
v4.6
DC+ and DC- polarity reversed.
v4.7
- Update
New frequency ranges for sweeps; weighted sweeps; sequences can call other sequences.
v4.8
- Moderate update
Weighting curves may be entered and applied to all tones generated.
v4.9
- Update
New frequency ranges for sweeps and segments can be repeated in a sequence at different levels, e.g. UU+10U-10
v4.10
Minor changes.
v4.11
- Significant update
Improved test tape operation and more...
v4.12
Automatic option selection on crosstalk; tolerance failure indicated on LCD for sweep graphs; configuration J selects normalisation; Studer tape tolerance.
v5.0
- Update
New features in V4.7-V4.12 software tidied up and rationalised; improved help in tolerance editor; 15kHz crosstalk segment; improved range selection on two channel repeating sweeps.
v5.1
Segment to select output channel.
v5.2
Provisional HP Deskjet printer support.
v5.3
- Moderate update
Full HP Deskjet and Epson LQ printer support. Improvements to user level segments and graph functionality and more...
v5.4
Improvements to sequence functionality and new remote command for rapid level sampling.
v5.5
- Update
Speed measurement, faster autoranging, Mono distortion tone, simpler printout formats and more...
v5.6
- Moderate update
New waveforms for negative going sawtooths and double tones (requires oscillator EPROM updates to OSC13). Difference frequency distortion.
v5.7
- Moderate update
Test tape mode is now more tolerant of noise and glitches, FSK decoding on right channel, crosstalk measurements at different levels.
v6.0
- Moderate update
Sequence banks. LA101 Configurations T6 and S6. Printing channel difference graphs. User tolerances increased from 5 to 10. CSV results files. SR? remote command.
v6.1
Improved phase measurement and improved Epson and HP printer support.
v6.2
- Minor update
Remote results format tidied up, heading correctly positioned and time out error fixed.
v6.3
- Minor update
Subtract referance curve facility introduced.
v6.5
V6.3 did not permit the use of weighted frequency sweeps. This is corrected.
v6.7
- Significant update
Sweep headroom modified to provide greater accuracy in certain test circumstances.


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LA100 Application Notes

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LA100 Application Notes