QuinStar Technology’s QMA series of spectrum analyzer mixers facilitate the display and measurement of milli¬meter-wave signals using lower frequency (microwave) local oscillator signals. They cover the frequency range of 18 to 110 GHz in seven waveguide bands. These mixers are designed to operate with many popular spectrum analyzer models that have local oscillator outputs and IF inputs.
For spectrum analyzers with separate LO output and IF input ports, an optional diplexer that combines the LO and IF signals is available from QuinStar. Spectrum analyzers with built-in diplexers, such as the HP8555A, HP8565A, HP8569A, Tektronix 7L18 and Tektronix 492, do not require the diplexer option. However, the diplexer option is required for spectrum analyzers without built-in diplexers such as the HP8566A/B, HP8569B and Anritsu 710.