Tektronix RSA5100A Series Printable Help page 319

Audio Analysis
Table 6: Predefined audio filters
Filter type
LPF (Low Pass Filter)
(5th-order Butterworth response)
HPF (High Pass Filter)
(5th-order Butterworth response)
De-emphasis (FM only)
Standard
xxx
1
User-entered values are restricted to maximum of 0.9 * Audio BW, and will automatically adjust downward to meet this limit (if required) when
AudioBW is decreased.
Standard.
Use this setting to specify the telecom weighting filter. The characteristics of these filters are
described in ITU-T Recommendation O.41, Psophometer for Use on Telephone-type Circuits.
Using Custom Audio Filters
If you want to use audio filters that have a different response shape than the pre-defined filters, you can
create a custom audio filter using a text or CSV file to specify the desired filter frequency response.
To use a custom audio filter:
1. Verify that Audio Spectrum or Audio Summary is the selected display.
2. Click the Settings icon or select Setup > Settings.
3. Select the Audio Filters tab.
4. Click the File button.
5. Click the ... button and navigate to the location of the custom audio filter file you wish to use. Select
the file you want to use and click Open.
6. Acquire a new trace or replay a saved file to see the effect of the custom filter.
RSA5100A Series Printable Help
Available settings
300 Hz
3 kHz
15 kHz
30 kHz
80 kHz
300 kHz
User 1
20 Hz
50 Hz
300 Hz
400 Hz
User 1
25 μs
50 μs
75 μs
750 μs
User. Range: 25 μs to 10 ms
CCITT
C-message
Audio Filters Tab
305