Aeroflex 6970 RF Power Meters - AEROFLEX - #2

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All the power sensors are individually calibrated and supplied with a calibration data chart. The auto ZERO function reduces offset errors on each of the 6970 ranges. This increases measurement accuracy at low power levels and improves the measurement sensitivity. Built-In Power Reference The built-in power reference provides an accurate 0 dBm (1 mW) 50 MHz calibration signal. Power sensors can be calibrated against this reference for improved measurement accuracy and traceability. The power reference is automatically switched on during a CAL procedure or it can be enabled at any time to provide a traceable 0 dBm signal for verification. Operation The instrument front panel consists of a keyboard and a four digit LCD with annunciators. Power levels are clearly displayed on a digital readout with an analog bargraph to facilitate peaking and nulling. Power levels may either be displayed in logarithmic units such as dBm or dBV or in Watts. To save battery life, the unit powers down six minutes after the last key press. 6970 will operate for 7 hours from a full battery charge. When the instrument powers down the last operator set-up is stored and this will be the state the 6970 assumes when it is next switched on. Upper and lower power limits can be set. An audio and visual alarm alerts the user of a measurement that is out of limits. This is useful to set a power to a pre-determined level as well as for monitor-ing purposes. The 6970 is fully auto-ranging but manual range hold is also possible. Manual range selection is used when measuring modulated or unstable signals. The display indicates either AUTO or MAN as appropriate and will also provide information of over/under-range conditions. Wide Range of Power Sensors The 6970 uses the same rugged IFR power sensors that have been developed for the 6960 Power Meter and 6200B series Microwave Test Set. A wide range of 17 sensors is available covering the frequencies from 30 kHz to 46 GHz. Power level measured depends on sensor type, sensors cover from -70 dBm (0.1 nW) to +44 dBm (25 W). To cater for the different frequency ranges connector types include N type, PC 3.5 mm, 2.92 mm and N type (75 W). SPECIFICATION Frequency Range 30 kHz to 46 GHz Depending on sensor used Power Range -70 dBm (0.1 nW) to +44 dBm (25 W) Depending on sensor used Power Sensors Supported 6910 series (-30 dBm to +20 dBm) 6920 series (-70 dBm to -20 dBm) 6930 series (-15 dBm to +35 dBm) 6930 series opt 2 (-5 dBm to +44 dBm) Instrumentation Accuracy Including Carryover ±1% range 0, 1, 2 ±5% range 3 Power Accuracy After calibration using 0 dBm, 50 MHz power reference: ±0.2 dB Measuring a 50 MHz signal in the centre of the power sensor dynamic range, from a source with a return loss better than 14 dB DISPLAY Resolution 4 digits for positive readings 3 digits for negative readings Units dBm, nW, mW, mW, W, mV, V, dBV Annunciators Analog bargraph, Battery low indicator, Indication of auto-ranging or manual range, Upper and lower limits CORRECTION Linearity Factor Ability to enter in range 0.01 to 15 with 0.01 resolution Defaults to standard setting Calibration Factor Ability to enter in range 0.01% to 200% Resolution: 0.01 to 99.99% 0.1 100% and above Auto-Calibration Ability to calibrate against a 0 dBm (1 mW), 50 MHz power reference Auto-Zero Removes DC offset from gain stages and power sensor Set <400 nW (6910 series) <100 pW (6920) <200 pW (6923/6924) <12 mW (6930 series) Drift When measured over one hour at constant temperature ±10 nW (6910 series) ±100 pW (6920 series) ±300 nW (6930 series) NOISE Averaged over 5 s