EIA JESD 306:1965 (R2009)

The generator shall have an output impedance of 50 ohms. The attenuator shall be designed to work in a 50 ohm line. The detector and load shall have a 50 ohm input impedance. Network S1 shall be a single-tuned network designed to operate from a 50 ohm source. Network S2 shall be a single-tuned network designed to operate with a 50 ohm load. Network T is a neutralization network and should be used if specified. The common terminal and the operating biases of the transistor under test shall be specified. Good engineering practice must be used in bypassing bias supplies, shielding individual portions of the circuit, and in minimizing the effects of ground currents. The test circuit for the transistor shall be constructed such that it follows in form the specified test circuit, and it shall have values approximately equal to the nominal values specified for the test circuit.