Changes of P900 versions from 1.0 and up

Changes from version 1.0 to 1.0-a

a) Fully mouse support added to edit and modify reference curves.

Changes from version 1.0-a to 1.0-b

a) New filter MOD-FIX added. This filter is a FIX-HP filter where the filter setting automatic turn over to a tracked filter 5 times less the corner HP filter frequency.
This give a better detection just before the FIX-HP filter begin to meet the FIX frequency corner. The MOD-HP is terminating the data at the frequency corner.

Changes from version 1.0-b to 1.0-c

a) List of stored types in Utility Process data did list 64 types. This is changed to 512 types.

b) In Utility Process data Replace part of curve the Min curve did not work for BL curve.

This is corrected.

c) A new test “R-23” have been added. This is relative distortion test, a ratio between some distortion types.

d) In Edit-mode Select Display function have been expanded to selection a single curve in each display channel (A-D).

e) In Run-mode Select Display under Cursor have been expanded to selection a single curve in each display channel (A-D).

f) In Utility-mode Process Statistical Data, Select Display under Cursor has been expanded to selection a single curve in each display channel (A-D).

g) Import 2. And 3. Reference curves used in channel A did not check if the curves were set off if present. This is corrected.

h) In Edit-mode curve convert, Scale, T-curve and Gain Adj. submenus have been improved due to no d)

i) The update speed of graph curves updated. In utility process mode with approximate 3-4 times.

j) A second brand of dongle has been added to system.

k) IO input bit 0-3 inverted to give a better interface handling.

l) When chain was used in run-mode and the first and last test used different test points the last test was displayed with the first test no of points. This is corrected.

m) The maximal end frequency of a sweep changed from 30000 Hz to 50000 Hz if sample frequency is 192000.

n) When sample frequency is 192000 the selection of upper filter limit is 22, 34, 45 or 52 KHz.

o) Sync Burst function at polarity test did not work. This is corrected.

p) In edit mode the display shows some garbage in channel A when arrow up or arrow down was used and the number of display was 2 or 3. This is corrected.

q) At the sweep a “Slow” function added. The minimum step rate between each frequency step can be slowed approximate 4 times slower than normally sweep.

This reduces the delay between sound from speaker and microphone depending distance. Example 10 kHz could be displayed at 15 kHz if sweep speed was too fast.

r) When output compress function was used ref channel was not stored. This is corrected.

s) Bl mode corrected. The delay was faulty implemented. This corrected.

t) The Ai function did not work correct in run-mode. This is corrected.

u) Sync Burst renamed to Sync delay and a spate delay added.

u) Process delay added.

Changes from version 1.0-c to 1.0-d

a) If chain was used and resonance test was used in channel C the curve was changed to reject color if first test was called and rest was test was displayed. Test was ok. This is corrected.

b) If R2 test was used and later disabled the test got a reject as total test even it was not used. This is corrected.

c) If chain and System2 was used and the output level was different from first and second test channel C was failed du to mix in the first and second test. This is corrected

Changes from version 1.0-d to 1.0-e

a) The display when using an external amplifier with a sense resistor updated.

b) If chain was used and the last called and the setup was different in no of points and frequency setup from the first one the system used the last parameters for the setup the first. This for Phase, Bl and R23 measurements. This is corrected.

c) If in setup the F-test and EBP was reset and saved, (the f-test and EBP test off), and the test did show a reject in run-mode. This is corrected.

d) A buffer mish mash in Utility id R23 test was used. This is corrected.

e) Hi-2 user limit was not stores or read in database. This is corrected.

f) Limit for 2th and 3th reference and R23 limits was not transferred to Log setup. The backup database. This is corrected.

g) As option System 3 have been added the system in Run-mode. Display resolution on minimum of 1440x900 needed. . P900 pro+.

h) As option a chain result for second measurement (first, second and last) have been added the system in Run-mode. Display resolution on minimum of 1440x900 needed. P900 pro+.

i) As option a chain result for second and third (first, second, third and last) have been added the system in Run-mode. Display resolution on minimum of 1440x900 needed. . P900 pro++.

Changes from version 1.0-e to 1.0-f

a) A check for max output voltage in setup added (internal max is 14.0 Volt).

b) In run mode when win 10 was used some instability could happened in the beginning of a sweep appear. This is corrected.

c) In run mode user number added to data did only work for first measurement. This is corrected to work for first, second, third and last measurement.

d) The Re measurement did not work in chain mode. This is corrected.

e) Check for jack plug preset on input (the Extern enabling) is changed from 50 mSec to 100 mSec refresh in Hardware Calibration menu.

f) Check for jack plug present has been added in setup menu if output B or Ext is selected.

g) Info for invalid input mux selection has been added in setup menu.

Changes from version 1.0-f to 1.0-g

a) Changes in global setup for +48 volt added to change log.

b) F-value not off in stat on chain sequence 3 and 4. This are corrected.

c) In utility mode the last display in manual mode did not clear result display. This is corrected.

d) In utility mode last record was not included in continue display. This is corrected.

e) A check for USB connection added. A missing connection or an critical error in communications terminate P900 program with an error

Changes from version 1.0-g to 1.0-h

a) Did not use a correct screen size due to some multicore PC’s in win11.
In utility when manual mode was used in process data saved screen dump This is corrected by adding a small delay before a screen dump was made.

b) In utility process data find function did not read the stored status for channel if on. This is corrected.

c) THD test did not work due to wrong filter settings when chain with 3 and 4 pictures was added. This is corrected (only + and ++ version)

d) In Run mode graph display did not display the type name if chain was off. This error was added when chain with 3 and 4 pictures was added. This is corrected (only + and ++ version).

e) Relative filter display added +20 db gains setting.

f) A noise count added in run mode to repeat test if fails. The allowed counts are set in global menu corrected (only + and ++ version).

g) A new test added to test Q. The readout and test setting are done in ohm. The test is called QR test corrected (only ++ version).

h) The output signal on Jack Plug left and right signal was the same. It is now possible to invert right output. This enable balanced output. This function is added in hardware setup menu (only ++ version).

i) In Hardware setup menu it now is possible to select Extern Amplifier by enable “Auto”, “On” and “Off”.

j) The Process delay did not work in run-mode. This is corrected.

Changes from version 1.0-h to 1.0-i

a) In edit-mode the Spectrum, the FFT plot did only work when the input 1 or 4 was used for input. Now all inputs 1 to 6 can be used.

b) The FFT plots now expand display range from 100 to 120 db.

c) Improved display range for gain +20db in relative display mode.

d) In hardware calibration menu it was not possible to change output is output B was selected without a error. This is corrected.

Changes from version 1.0-i to 1.0-j

a) In utility process data in auto mode statistical data collect and accept values was selected display could be blank show display not corrected with data.
This have only been seen when a fast pc was used with some display cards. Reason display card was not completed with updating before p900 program copied the video card.
A delay before read video card has been added.

b) In utility process data in auto mode the serial number entered in run-mode is now displayed when find function is used.

c) In utility process data in manual mode the serial number entered in run-mode is now displayed when find function is used.
However the find setup only use channel A as best fit to average as default in manual mode.

d) Temporary files (§) are now removed at p900 program exit.

Changes from version 1.0-j to 1.0-j1

a) In export utility an error terminated the export. The reference limits was not exported. This is corrected.

Changes from version 1.0-j1 to 1.0-k

a) Sweep reverse have been updated. The parameters could not be changed when entered a sweep. The default parameters did replace the just entered values.
This corrected. The slow option is now added to sweep reverse function.

b) In Hardware setup menu a “Run Init” flag is added. In Run mode the internal setup of all programmable hardware are reloaded for every sweep. This function have to purpose to reduce external noise can change hardware setup in P900 system. When the flag is on this function is active else the function is off.

Changes from version 1.0-k to 1.0-l

a) The R-23 test did only work with input 1 or 4. Input 2, 3, 5, or 6 did not work. This error is corrected.

b) In the noise check menu input channel 4, 5 and 6 did not work. This error is corrected.

c) In THD/ TD test menu a not valid input channel was selected (no microphone connected) a curve was present however a selection between 2 and / or 3 harmonic show garbage. The garbage is now removed so only a valid selected input work.