Overview
The CG18G is a high frequency comb generator reaching from 100 MHz to 18 GHz. In combination with an antenna it can be used for emission testing in anechoic chambers, GTEM cells or open area test sites.
The comb generator CG18G produces a frequency spectrum consisting of lines with 100 MHz spacing up to 18 GHz. In
combination with an antenna it can be used as an emission source for testing open area test sites, anechoic chambers or
GTEM-cells. Single components like measuring receivers, spectrum analysers, cables and attenuators can be tested as well.
Intentional Frequency Tuning
Using the frequency fine tuning control " -∆f + " the reference frequency can be shifted in a narrow range. The red LED
illuminates when the fine tune is active to avoid unintentional frequency shifting which could result in wrong measurement.
The fixed position "100 MHz" is the standard position (LED dark). The intentional frequency tuning can be used to
compensate for a frequency difference between the CG18G and a receiver. However it must be considered that in
contrast to a comb-generator, a receiver or spectrum–analyser has no simple relation between reference frequency
and receiving frequency. A perfect tracking on one frequency may cause a severe offset somewhere else. Frequency tuning may also be helpful to avoid collisions with interfering signals for example in an open area test site.
