Features & Specifications
1. Features & Tools
ComTekk SINAD is a unique, versatile software product designed for radio service, testing, alignment and performance verification.
Utilizing the computer's default sound device, receiver audio is analyzed using Digital Signal Processing (DSP) techniques which yield very accurate, reliable measurements.
The following direct measurements can be made with CTSinad:
- SINAD (dB)
- SNR - Signal to Noise ratio (dB)
- THD - Total Harmonic Distortion (%)
- THD+N - THD plus Noise (%)
A built-in smoothing filter slows meter response for better readability.
Accuracy will depend on some degree on the quality of the sound device used. Some older computers have very low-end embedded chipsets and may cause unstable or erroneous readings. The THD measurement for example, will obviously include that of the sound device in use.
NOTE: ComTekk SINAD is NOT intended or designed for use with high-fidelity equipment. A minimum frequency response of 20Hz~20KHz is required for useful HiFi measurements.
A sophisticated audio spectrum analyzer is included with CTSinad to provide a convenient visual picture of the signal under test. Manual control of the Y-axis (magnitude) is included, along with the ability to Zoom in on any particular segment, freeze the display, Save or Print a screen-shot.
2. Specifications
NOTE: These specifications relate only to the ComTekk SINAD software. Hardware specifications will vary between different computers and sound devices.
| Filtered Frequency Response: | 300Hz ~ 3,300 Hz |
| Input Sampling Rate: | 11,025 Samples / Sec. |
| Resolution: | 10.7 Hz using 10th-order FFT |
| Notch Filter: | Fc +/- 22Hz (windowed) |
| Direct measurements: | SINAD, SNR, THD, THD+N |
| Signal (Fs) frequency measurement range | 300 - 2,000 Hz |
| THD | 2nd and 3rd harmonics only |
3. Indirect measurements
Indirect measurements are those which can be derived from direct readings, whether through calculation or by changing the input or test conditions.
Several additional "indirect" receiver performance measurements may be determined using SINAD readings:
Click above for descriptions of these measurement techniques.