The Agilent J1420B, a register-based C-size three slot VXI module, is the receiver module of the SDH/SONET analyzer. It is used in combination with the Agilent J1421A Clock Source Module and the Agilent J1422B Transmitter Module. It receives framed SDH/SONET signals at 9.953 Gb/s using an optical interface while monitoring various alarms and errors. Features Receives SDH/SONET Framed STM-64/STS-192 Signals Monitors J0 an J1 Section Trace Messages Tests for Bit Errors Using PRBS Patterns G.826 and G.828 Analysis