Keysight 53220A/201 Universal Frequency Counter Timer: 350 MHz, rear inputs, 100 ps resolution, 53200 Series, high-performance frequency and time interval measurements.
Tektronix FCA3000 Frequency Timer/Counter/Analyzer: 300 MHz, 100 ps, 12 Digit, 3 mV, FCA3000 Series
Tektronix FCA3003 Frequency Timer/Counter/Analyzer: 3 GHz, 100 ps, 12 Digit, 3 mV, FCA3000 Series
Tektronix FCA3120 Frequency Timer/Counter/Analyzer: 20 GHz, 50 ps, 12 Digit, 1 mV, FCA3100 Series