The Tone Def. tab configures the audio test signal generated by the CMU. This signal is composed of up to 20 test tones with different frequencies and levels. All parameters can be set independently for the two AF channels 1 and 2.
Multitone Configuration - Tone Def.
| Default Settings | The Default All Settings switch assigns default values to all fields in the Tone Def. tab (the default values are quoted in the command description in chapter 6 of this manual). Two additional default switches reset all AF Channel 1 or all AF Channel 2 settings, respectively. |
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Remote control |
| Level Handling:
Total Level |
The Total Level parameter defines the sum of the individual voltages of all enabled tones. The meaning of the total level depends on the Level Selection setting, see below. The Total Level entered in the Manual column must not exceed the maximum level of the AF generator quoted in the data sheet. |
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Remote control |
| Level Selection | The Level Selection table section defines how the voltage of each of the test tones is determined: |
| Use separate levels for each tone | The Total Level is ignored. It can still be edited for future measurements where the Level Selection parameter is set to Manual. |
| Use Total Level | The Total Level entered in the Manual column is evenly distributed among all test tones. This means that the level of each test tone enabled via the AF Gen. switch in the Tone Definitions table is set to Total Level / n where n is the number of test tones enabled (n = 1 to 20). |
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Remote control | |
| Tone Definitions | The Tone Definitions table assigns an audio frequency
(in Hz) and RMS voltage (in mV) to each of the 20 test tones.
The frequencies must be multiples of 1 Hz. It is possible, however, to define several tones at the same frequency, or to number the tones in arbitrary order: The x-axis is scaled by the number of the test tones, not by their frequency. The RMS voltages (levels) of different tones may coincide and can vary within the range quoted in the remote control command description in Introduction - Commands. The sum of all test tones must not exceed the maximum level of the AF generator quoted in the data sheet. |
| Note: The voltages of all test tones enabled can be set manually or automatically, depending on the setting of the Level Selection parameter described above. | |
| The AF Gen. checkbox switches the tone in the audio signal and the corresponding bar in the test diagram on (if checked) or off. | |
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Remote control |