OPERATIONS, MEASUREMENT |
| This measurement module has three variations of possible Measurement | |
TONE | Types: Power Sweep (single frequency), Multi Frequency Power Sweep, | |
| Gain and IMD. | |
Single Frequency | Procedure. | |
Power Sweep |
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| Prepare the ME7840A as shown in Chapter 3. |
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| Enter the appropriate test values in the displayed |
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| User Input screen. The input fields are described |
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| below: |
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| Measurement Type: Drop down options showing |
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| Power Sweep (single frequency), Multi Freq Power |
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| Sweep (uses 3 frequencies), Gain & IMD. Set to |
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| “Power Sweep ” for this test. |
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| Main Tone (MHz): CW Frequency setting for |
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| source 1. |
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| Offset (kHz): Offset frequency for Source 2 |
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| (Source 2 will be set to Main Tone + Offset). |
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| Start Power (dBm): Power will be swept starting |
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| at the start power (input RF power to AUT). Both |
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| sources are simultaneously set to each power set- |
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| ting. The stop power is also entered in the “to” |
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| window. |
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| Data Points: Number of data points in power |
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| sweep. |
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| Increment Power (dBm): Value to increment |
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| power for each data point (calculated and dis- |
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| played only). |
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| Source Attn (dB):Value of Source attenuation, be- |
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| tween 0 and 70 (calculated and displayed only). |
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| Drain Current Checkbox: When checked the |
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| drain current is measured and power added effi- |
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| ciency is calculated and displayed. |
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| PStop Level (dB):Provides the ability to set the |
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| PStop value based on the level of gain compres- |
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| sion. Drop down options include compression levels |
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| of 1 dB through 10 dB in 1 dB increments, and |
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| OFF. If OFF is selected, then the P Stop equals the |
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| value entered in the “to” window above. If the se- |
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| lected compression occurs, PStop for all subse- |
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| quent power sweeps is reset to one increment be- |
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| fore the Pin value where this compression level is |
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| reached. |
| ME 7840A OMM |
