RF Logic RF257 Automatic Modulation Meter

RF Input

Frequency Range: 1.5MHz to 2.0GHz and useful response, with reduced sensitivity, to at least 4GHz.

Impedance: 50 Ω nominal.

Level: 2mV to 1V rms Full specification for noise, accuracy, etc applies over the input range 10mV to 1.0V

Max Input: 0.5W continuous.

Tuning: Automatic tuning selects the largest available signal. Correct operation requires spurious signals to be >10dB below the wanted signal.

Acquisition: Typically < 100ms. Settling time for the AF circuits is additional and is typically 1s for a reading > 75% of the meter range.

L.O Feedout: -60dBm typically.

FM Measurement

FSD Ranges: Five ranges with full-scale deviations of 1kHz, 3kHz, 10kHz,30kHz, and 100kHz.

Modes: Peak Positive, Peak Negative and Mean deviation.

Accuracy: ± 2% of Full scale ± 1% of reading with a 1kHz tone. See audio filter specification for additional error due to AF response. Residual FM is additional.

Residual FM:

<20Hz at 100MHz

<100Hz at 500MHz

<200Hz at 1000MHz

Measured with 3.5kHz AF bandwidth.

Distortion: <1% at 100kHz deviation with a 1kHz tone.

AM Measurement 

FSD Ranges: Five ranges with full scale indications of 1%, 3%, 10%, 30%, 100%.

Modes: Peak, Trough, and Mean of peak and trough.

Accuracy: ± 2% of Full scale ± 2% of reading with a 1kHz tone. See audio filter specification for additional error due to AF response.

Residual AM is additional.

Residual: AM <0.5% ( 15kHz bandwidth selected )

Distortion: <1% for 80% AM with a 1kHz tone.

Environmental Temperature

Operating: 0°C to 55°C. Full specification over the range 5°C to 45°C.

Storage: -20°C to 55°C.

Humidity: Max 95% RH at 30°C

Mechanical

Size: H105, W215, D305 mm

Weight: Approx. 1.7kg.

Approx. 2.6kg with battery option.

Datasheet