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Precision Automatic Noise Figure Indicators
Features
- Resolution: An expanded meter scale that enables resolution to a few hundredths of a dB
- Range: Selectable offsets provide full scale ranges 0, 3, 6, 12, and 18 dB preserving the high resolution for most noise figure measurements
- Dynamic Range: Will provide accurate measurements over an input signal level window of better than 65 dB
- Level Indicators: LED indicators provide a positive indication that the input signal level is within the instrument's dynamic range
- ENR Calibration: Permits the user to calibrate the instrument directly from the front panel for a noise generator ENR range of 14.0 to 16.5 dB
Specifications
| Input Frequency | 21.4, 36, 45, 60, 70 and 160 MHz switch selectable |
| 30 MHz direct input/td> |
| 10 MHz to 1000 MHz with an external local oscillator (double side band conversion) |
| Sensitivity (nominal) | -80 dBm @ 30 MHz |
| -72 dBm @ switch selected frequencies |
| -66 dBm with external LO |
| Input Level Range | 65 dB minimum |
| ENR Calibration Range | 14.0 dB to 16.5 dB |
| Noise Source Output | Manual On: | +28 ±0.1V @ 60 ma. nominal |
| Manual Off: | < 0.5V |
| Auto: | 0 to +28V pulsed, nominal 40% duty cycle |
| Full Scale Meter Ranges | 0, 3, 6, 12 and 18 dB |
| Bandwidth (nominal) - MT7514B | 6 MHz at 30 MHz input |
| 3 MHz at all other frequencies |
| Recorder Output | 50 mV nominal at full scale meter deflection, 5 kohm balanced |