ComTekk SINAD software Version History www.comtekk.com v2.00 Pro 5/7/2020 ---------------------- 1. Removed spectral display. Now displays a moving SINAD graph over time 2. Sample averaging employed (adjustable) 3. Data logging feature added 4. TCP server feature added 5. GPS Location acquisition and logging added 6. User settings saved at end of session 7. Input and output audio device selection in settings 8. Pause/Play button added to GUI v1.30 [beta] 5/2012 ---------------------- 1. Updated GUI/audio/DSP libraries, compatible with Multi-Decoder 1.2, Tone Gen X.X 2. Forms now sized dynamically to accommodate Windows Magnifier 3. Audio input devices checked on launch, terminates if none found. 4. Improved generator (source) level adjustment range v1.20 3/23/2011 ---------------------- 1. Changed SINAD calculation from 10log to 20log, for amplitude measurement. 2. SINAD meter scale increased to 40dB max. 3. THD = (mean of 2nd + 3rd harmonics) / Signal(rms) 4. Smoothing applied to THD also 5. Measurement bandwidth 300-3,300 Hz v1.10 10/11/10 ---------------------- 1. Updated components to resolve app errors on some XP machines. Built with new compiler. 2. Scope has enhanced toolbars for X/Y zoom, etc. Manual Y-axis control removed. 3. Smoothing enabled by default. 4. Mixer button now opens recording control panel in Windows 7, XP or Vista 5. Frequency change updates source generator without disabling v1.04 3/29/10 ---------------------- 1. Smoothing now applied to THD+N also. 2. SINAD algorithm updated 3. POWER button now toggles input stream on/off 4. Corrected calculation error in THD+N. 5. Measurement bandwidth upper limit changed to 3100 Hz to ensure capture of 2nd harmonic 1kHz v1.03 7/30/08 ---------------------- 1. Fs can now be adjusted from 300 to 2,000 Hz. Built-in tone generator frequency now follows this setting. 2. Mixer button now opens Windows Recording Control instead of Volume Control. 3. Meter smoothing function now works correctly. 4. Fixed spectrum analyzer frequency indication (X-axis scaling). 5. Added Windows Vista audio mixer support. v1.02 8/26/07 ---------------------- 1. Updated temp cert to facilitate online delivery v1.01 8/14/07 ---------------------- 1. Fixed key registration problem ---------------------- 1.00 INITIAL RELEASE 4/24/07 ----------------------