Keysight Technologies 11867A Operating And Service Manual

Contents

Keysight Technologies 11867A Operating And Service Manual Manual pdf 15 page image

Keysight 11867A Operating and Service Guide 15OperationOperating environmentThe operating environment should be with the following limitations:– Temperature: 0°C to +55°C– Humidity: <95% relative– Altitude: <4572 meters (15,000 feet)Mating connectorsMating connectors used with the limiter should be Type-N connectors that are compatible with USMIL-C-39012.InstructionsFor reliable operation over its full frequency and power range, the limiter must be used as aunidirectional device. Incident power must be applied as shown on the label of the limiter. Thelimiter can be used to protect the input mixer of a spectrum analyzer, the sampler of a networkanalyzer, the power sensor (or thermistor mount) of a power meter, or the input circuitry of anyother device that might be subjected to transients and accidental overloads.The use of an attenuator between the limiter and the device it is protecting is recommended tominimize measurement uncertainty that is due to multiple mismatches. For example, set the inputattenuator of a spectrum analyzer to at least 10 dB.Harmonic distortion is generated by the limiter while it is limiting. If the incident signal exceeds thelimiting threshold, use attenuation between the limiter and the source to reduce the signal below 1mW. Typical harmonic distortion below the limiting threshold is shown in Figure 4. The limiter willstill prevent transients from damaging the device it is protecting.CAUTION Do not apply more than 10 W average power or 100 W peak power to the limiter. Thereshould be <1.3 Vdc with no RF applied, and 0.0 Vdc when RF is applied. Permanent damageto the diodes could result from exceeding these levels.