AtlanTecRF’s LPB and LRU series of portable, battery powered Loop Test Translators (LTTs) provide users with the most versatile and comprehensive operating configurations for translation of uplink (Tx) frequencies to either downlink (Rx) frequencies or to L-band, and for L-band to downlink (Rx) through the use of its synthesized variable frequency Local Oscillators (LOs). They are designed to simulate the satellite transponder frequency conversion for system alignment and continuous quality monitoring.