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RF MICROWAVE MEASURING INSTRUMENTS

ter under representative conditions. The return loss of amplifiers andother devices can only be evaluated under high power pulsed condi- tions with a peak power meter connected to a high directivity coupler.

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MA2490A and MA2491A Wideband Sensors

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MA2411B Pulse Sensor The MA2490 series sensors are wideband sensors suitable for pulse and CDMA applications. They have a selectable 5/20 MHz band- width. The MA2490A covers the range 50 MHz to 8 GHz and theMA2491A extends the range to 18 GHz. Rise time on this sensor is18 ns. The sensor incorporates a “chopper” which extends the RMS measurement range to –60 dBm. Upper limit is +20 dBm. The MA2411B Pulse sensor is specifically designed for fast mea- surements on pulsed or 4G systems. The sensor has a rise time of 8 ns. This sensor covers the frequency range 300 MHz to 40 GHz.

Specifications

Frequency Range 100 kHz to 65 GHz, sensor dependant Power Sensors Meter compatible with all MA2400A/B/C/D Sensors Display Measurement Range -70 to +200 dBm dependant upon sensor range, external coupler or attenuator Selectable from 0.1 to 0.001 dB in Readout Mode0.01 dB in profile mode Time Axis 1 ns settable resolution Pulse/Modulated Mode <200 ns capture time (200 points)15 µ s CW Mode Display Resolution Display Units Linear: nW to GW,%,VoltsLog: dBm,dBW,dB, dBmV,dBmV Power: Average, Peak, Crest, Maximum, MinimumStatistics: PDF, CDF and CCDF PAE: Power Added Efficiency Measurements Pulse/Modulated for wideband measurements CW for CW measurements Peaking Meter ±5 dB range Readout/CW mode only Measurement Modes Profile (Graph) for Pulse/Modulated Mode Readout (Numerical) for Pulse/Modulated and CW Display Average, Max, Min, Max and MinMeasurement Hold, Max, Min Hold Measurement Display Standard Diode Sensors -70 dBm to +20 dBm CW mode -34 dBm to +20 dBm Pulse Modulated Mode Overall Dynamic Range Wideband Sensors -60 dBm to +20 dBm CW mode -30 dBm to +20 dBm Pulse Modulated Mode Pulse modulated mode dynamic range covered by 3 overlapping amplifier ranges, R7,R8 & R9 CW mode dynamic range covered by 5 overlapping amplifier ranges, R1,R2,R3, R4 & R5 Universal Sensor MA2481/82D ranges 1 to 6 Power Meter Amplifier Range Range 7 Dynamic RangeMaximum normal nominal operational value to Bottom nominal limit -2 dBm to +20 dBm MA2491A -6 dBm to +20 dBm MA2472D Pulse Modulated Amplifier Dynamic RangePerformance Range 8 Dynamic Range Maximum normal nominal operational value to Bottom limit -20 dBm to +10 dBm MA2491A -24 dBm to +6 dBm MA2472D
Power Measurement Dynamic Range Range 9 Dynamic Range Maximum normal nominal operational value to Bottom limit -30 dBm to -4 dBm MA2491A -34 dBm to -9 dBm MA2472D Range Control Automatic or manual. When in manual clear indication given to user (display and GPIB) of fault conditions (under or over-range) As defined by uncertainty calculations with relevant sensor and source match conditions Instrumentation Accuracy CW Mode <0.5% ±0.02 dB absolute accuracy ±0.04 dB relative accuracy Equivalent Noise Power 256 Moving AverageMA2472DMA2491A Range 10.5 µ W2 µ W Zero setCW mode (each range) Range 250 nW100 nW Range 30.5 nW2 nW Range 40.2 nW1 nW Range 550 pW0.5 nW Instrumentation AccuracyPulse/Modulated Mode <0.8% Nominal range 7,8
Power Measurement Accuracy Equivalent Noise PowerMA2472DMA2491A Zero SetPulse/Modulated Mode (each range) Range 75 µ W15 µ W Range 81 µ W5 µ W Range 90.5 µ W2 µ W Continued on next page

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