Waveform Analysis Option: TRsSim / AI-5120The Waveform Analysis option to the TRsSim software examines waveforms downloaded from the AI-5120 and extracts additional measurements. By using the additional processing ability of the PC, complex algorithms compute and display signal measurements that can not be accomplished by the AI-5120 alone. The following screenshots show some examples of the functionallity provided by this optional software component:
1. Annotate FSK Bits and Bytes:
When displaying a Bell 202 or V.23 FSK signal, the decoder output is overlaid showing the position and value of each detected bit and byte value.
2. FSK Signal Measurements:
Analyze FSK signals and extract the number of channel seizure, mark and mark out bits. Report mark/space frequency and level. Report the presence of any interfering signal. Report signal drop-outs detected during channel seizure and mark. Display spectral content present during the mark signal.
3. DTMF Signal Measurements:
Analyze DTMF signals and measure distortion level, identify strong interfering signals, check for transients, verify compliance to TIA-470.230-C or ETSI ES 201 235-3 distortion limits. Display spectral content present during the DTMF digit. Note that duration, row/column level and frequencies are measured by the AI-5120 and do not require the waveform analysis option.
4. CAS/DTAS Signal Measurements:
Analyze CAS/DTAS signals and extract tone levels and frequencies, determine tone duration, measure distortion, check for preceding SAS tone and extract frequency, level, and timing. Display spectral content present during CAS/DTAS signal.
5. Detect & Analyze Network Tones:
Detect and analyze signals matching defined network tone templates. The templates specify frequencies, minimum level and duration. If a waveform contains a signal matching any of the templates, the analysis extracts the level, frequency, and duration of each tone. Common templates include those for dial tone, ring back tone, and busy tone.
6. General Tone Analysis & Sweep Detection:
Any waveform can be analyzed for tones in the range of 200 Hz to 7000 Hz. The frequency, level, duration, and possibly distortion is measured for every tone detected. If a sequence of tones in ascending or descending frequency is detected, then a Frequency Sweep event reports each frequency along with absolute and relative level readings.
7. Waveform Filtering & Level Analysis:
Any waveform can have various programmable filters applied and its RMS level profile or envelope displayed. In the figure below, the DTMF digit '5' was 'notched' out leaving the remaining dial tone signal.
8. Waveform Measurements:
Measurements such as frequency, peak-to-peak, maximum, minimum, mean, RMS, cyclic mean, and cyclic RMS can be performed on any recorded waveform.