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Precision Automatic Noise Figure Indicators
Functions
and 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; 10 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 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
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