A range of Dual Channel Loop Test Translators (LTTs) has been launched by global RF and microwave components and equipment manufacturer AtlanTecRF.
These new products are designed to provide a comprehensive test and quality monitoring facility in satellite communications ground stations and teleports.The ALD series of LTTs, available for operation in Ka- and Ku-bands, feature simultaneous translation of transmit (Tx) frequencies to L-band and L-band to receive (Rx) frequencies thereby enabling uplink and downlink parameters to be evaluated at the same time and with one instrument.
The architecture of each channel contains a synthesized local oscillator (LO), the frequency of which can be changed in either 25MHz steps or 1KHz steps so that the Tx and Rx bands relate to the L-band modem frequencies of 950-1700MHz or 950-2450MHz. The transfer characteristics of each path can also be defined independently in terms of attenuation range, conversion loss and filtering to suit the performance requirements of the individual station. Control of both LO frequency and transfer attenuation is achieved either locally with easy-to-use touch controls or remotely via ethernet with GUI, and separately for each of the two links.
Frequency stability is assured with a choice of either internal OCXO with better than +/-0.05ppm over temperature, or by an external 10 MHz system source, the choice being made either locally or remotely on the rack mount instrument. LO phase noise at 27GHz for the Ka band instrument is -110dBc/Hz at 1 MHz offset and non-signal related spurious are guaranteed at below -60dBc. Enclosed in a 19” x 2U rack chassis the Dual Channel LTT has clean lines in front panel controls and all the interconnects are located on the rear panel for convenient installation.Accessories and cabling options are also available.
The uniqueness of the ALD product range, according to company CEO Geoff Burling, is the simultaneous translation of transmit (Tx) frequencies to L-band receive frequencies.