EIP 548A Microwave 12 Digit Counter

This product of the mid 1980's is a "head turner". It is a 12 digit frequency counter that will measure in 3 Bands, the frequency spectrum from 10Hz all the way up to a wopping 26.5Ghz! Features: 10Hz to 26.5 Ghz in 3 bands 10Hz to 100Mhz Band 1 1meg ohm impedance 25mv sensitivity, 120v max below 1Khz, decreasing 6dB/octave to 3v rms max 10Mhz to 1Ghz Band 2 50 ohm nominal -20dBm sensitivity, max level +10dBm 1Ghz to 26.5Ghz Band 3 50 ohm nominal -30dBm 1Ghz to 12.4Ghz, -25dBm 12.4Ghz to 18Ghz -20dBm 18Ghz to 22Ghz -15dBm 22 to 26.5Ghz Large 12 Digit Display can display down to the Hz A front panel Sample Rate knob to adjust gate and display time Through use of the Front Panel Keyboard you can: Choose your display units as Mhz of Ghz Pick one of 9 resolutions for the display Multiply the captured frequency by an integer between 1 and 99 and display it Set Frequency Limits Perform up to 5 System Tests Add or Subtract an Offset number to the captured frequency down to the Hz Calculate and display an mX + b function of the frequency The rear panel has: A bnc port for an external timebase input A switch to select either internal or external timebase An AC operating voltage switch Standard computer style 3 prong cord receptacle This unit has been cleaned, the TCXO calibrated, and this video was made of it's calibration, and operation, on all 3 bands from 10Hz to 9Ghz (the max of my generators).