2-Channel Power Meter 100kHz-26.5GHz, option: 002 = Rear panel sensor connector and additional reference oscillator w/ rear panel output The Agilent (now Keysight) 438A is a dual-channel power meter designed specifically for ATE systems. The compact front panel saves critical rack space, while the dual-channel design allows simple and accurate measurements of the ratio and difference of power levels from two separate sensors. This meter is compatible with the 8480 series of power sensors. GPIB capability is standard on the 438A. For U.S. Air Force Modular Automatic Test Equipment (MATE) system application, Option 700 provides the 438A with the internal capability to be controlled by the MATE Control Interface Intermediate Language (CIIL). Two power sensors for multi-port measurement Ratio mode for measuring gain compression Programmable high and low power limits for unattended power monitoring Frequency: 100 kHz to 26.5 GHz Power range: -70 to +44 dBm Dynamic range: 50 dB Measurement Modes: A, B, A-B, B-A, A/B, B/A