|Min. Freq.||10.0 Hz|
|Max. Freq.||26.5 GHz|
|Freq. Resolution [Digits]||12|
- 10Hz-26.5 GHz;
- 12 digit LED readout.
- Three input bands, Band One: 10Hz to 100MHz (sensitivity: 25mV rms) 1 megohm impedance (BNC connector); Band Two: 10MHz to 1.0GHz (sensitivity: 120dBm) 50 ohm impedance (BNC connector); Band Three: 1.0GHz to 26.5GHz (sensitivity: 30dBm from 1-12.4GHz, -25dBm from 12.4-18GHz, 20dBm from 18-22GHz, and -15dBm from 22-26.5GHz)
- 50 ohm impedance (SMA connector).
The 548A is a microprocessor-based, heterodyne Microwave Frequency Counter operating from 10 Hz to 26.5 GHz in three input bands. It features a 12 digit sectionalized LED display that makes it easy to determine frequency. An optional frequency extension (Band 4) and external mixer set permit measurements to 110 GHz in waveguide systems. An optional built-in power meter is available that permits simultaneous frequency and power meter readings with no degradation of the counter specifications.