8920 a radio frequency communication test device HP 8920 a is a fully functional test equipment, it can satisfy the cellular and ground maintenance and repair in the mobile communication requirements.8920 a combination of the characteristics of 22 kinds of complete equipment, provide test cellular phone, ground mobile radio and communications systems all the functional testing, measurable to 1 GHZ.In addition, due to the adoption of new standards of electronic attenuator, improves the reliability of the model 8920 a, helps to ensure the most effective use of the test device.