Tektronix / Active Probe / P6243 
?P6243: 1 GHz Bandwidth (probe only) ?P6245: >1.5 GHz Bandwidth (typ., probe only) ?<1 pF Input Capacitance ?1 Megohm Input Resistance ?Direct Access to SMDs as Small as 0.5 mm Pitch ?Measures CMOS, BiCMOS, ECL, GaAs and TTL Logic ?Low Mass Probe Head/Cable ?No Additional Power Supplies or Cables Are Required with TEKPROBE BNC Interface