26 SPECTRUM ANALYSIS EQUIPMENT; ATTENUATORS FOR TEST EQUIPMENT; RADIO FREQUENCY DETECTORS; TERMINATIONS AND MISMATCH TERMINATIONS FOR THE MEASUREMENT OF VOLTAGE REFLECTION COEFFICIENT AND VSWR IN COAXIAL SYSTEMS; CAVITY WAVEMETERS; FREQUENCY MARKER GENERATORS FOR MEASUREMENT OF FREQUENCY; PHOTECTOR IMPEDANCE BRIDGES FOR MEASUREMENT OF VOLTAGE REFLECTION COEFFICIENT; SWEEP GENERATORS FOR MEASURING FREQUENCY RESPONSE; MARKER OSCILLATORS FOR MEASUREMENT OF FREQUENCY; COLOR BAR GENERATORS FOR MEASUREMENT OF COLOR PURITY AND CONVERGENCE; WHITE DOT GENERATORS FOR MEASUREMENT OF COLOR PURITY, CONVERGENCE AND LINEARITY; AND OSCILLOSCOPES