The 1313-C250M18G from Ge-EMC is a Comb Generator that operates as a radiation reference signal source with a frequency range of 1 to 18 GHz at 250 MHz intervals. It has a frequency stability of 20 ppm and an amplitude stability of ± 0.1 dB. This comb generator is equipped with an integrated biconical antenna up to 18 GHz and is designed for routine on-site inspections, which can be performed in just a few minutes by reading several selected output frequencies and comparing the readings with reference data. It is designed to operate on a 7.4V Li-On, 1500 mAh battery to reduce the potential for unwanted reflections caused by external cabling. When fully charged, the internal battery pack allows for continuous operation of the for up to 5 hours. This comb generator measures 12 x 12 x 11 cm.