Comtech EF Data LTT1450G - Manual (Page 12)

Description LTT1450G Ku-Band Loop Test Translator
Page 1-2 TM063 - Rev. 1
The use of an external reference allows the translation to be phase coherent with the external reference.
The frequency of translation will track the frequency of the external reference to approximately 200 KHz
at the output frequency. This allows the external reference to contain Doppler information.