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The 578B is a multifunctional microwave frequency counter. The 578B is not only able to perform frequency measurements but can tune and phase lock an external signal source over a wide range of frequencies.
- Frequency range: 10 Hz to 26.5 GHz; 10 Hz to 100 MHz (band 1), 10 MHz to 1 GHz (band 2), 1.0 GHz to 26.5 GHz (band 3)
- Frequency resolution: 1 Hz
- Sensitivity: 25 mV (band 1); -20 dB (band 2); -30 dB to 12.4 GHz, -25 dB 12.4 GHz to 18 GHz; -20 dB 18 GHz to 22 GHz, -15 dB >18 GHz (band 3)
- Maximum input: +7 dBm
- Coupling: dc to 50 ohm termination, ac to instrument
- Input impedance: 50 ohm (bands 2 & 3), 1 megohm (band 1)
- Standard time base accuracy: 10 MHz, <3 X 10-7th/month
- 12 digit LED display
- GPIB (IEEE-488) interface
- SMA(f) connector (band 3), BNC(f) (bands 1 & 2)
- 100, 120/220, 240 Vac ±10%, 50-60 Hz operation
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