The Tektronix 067-0885-00 is a microwave comb generator plug-in for the TM500 system.
It consists of a signal source, a coaxial cable, 3 dB attenuator, and a comb generator module. The signal source is powered by a TM500 series power module.
The output of the signal source is applied to the comb generator module via the coaxial cable. The 500 MHz signal source can be frequency or pulse-modulated externally. When the output of the signal source is applied to the comb generator, a comb line (spectrum) of markers is generated, which are harmonics of the fundamental 500 MHz. The crystal controlled source provides an accurate reference to check frequency readout accuracy up to 20 GHz.
The unit is fitted with a SMA output.