PRO/Q: Digital QAM Signal Analysis Meter

The Pro/Q signal analysis meter is a portable, high-performance QAM or analog signal meter specifically designed and manufactured to meet the requirements of modern day CATV systems. The PRO/Q can test the CATV QAM or analog signals in the scan, spectrum, or channel modes. In the analog mode, the unit will measure video carrier, audio carrier, A/V ratio, and C/N ratio. In the digital mode, it will measure BER, MER of QAM 16, 32, 64, and 256 in ANNEX B, and QAM 16, 32, 64, 128, and 256 in ANNEX A mode. The Pro/Q will display a constellation of the measured digital signals. CATV cable tilt and trunk AC voltage can also be measured with this unit.

The Pro/Q features a large 2.4-inch by 1.8-inch LCD that conveniently displays all the measurements and graphs for easy interpretation. The data logging capability of the Pro/Q allows measurements made in the field to be conveniently retrieved by a computer using an RS-232 interface. When fully charged, the Pro/Q provides continuous and reliable operation up to five hours in the field.


  • Digital or analog measurements available in one instrument
  • Supports Annex A (16, 32, 64, 128, and 256) and Annex B(64 and 256) QAM modes
  • Leakage measurement in the spectrum mode or frequency mode if the exact frequency of the leakage is known
  • Full channel range from channel T7 to 135 (5 MHz − 860 MHz).
  • Multi-function digital or analog signal analysis includes all pertinent channel and system-wide information
  • Large, easy-to-read display provides quick glance capability in dimly lit environments
  • High accuracy for all individual channel and system parameters, including: spectrum, scan, tilt, carrier-to-noise, carrier level, and line voltage measurements
  • Tilt measurement for simplified system balancing
  • MER, BER, and test constellation graphic display for accurate digital signal analysis
  • Programmable power shut-off extends time between charges
  • High-impact plastic case and leatherette-vinyl case protect unit during field use