Injection transformer range Introduction When testing the transfer function of a control loop, a ‘disturbance signal’ from which frequency response analysis can be made is ‘injected’ into the loop. In order to ensure that the test system does not change the transfer function results, it is important that the signal generator providing the disturbance signal is isolated from the circuit being tested. This isolation can be achieved using a transformer or active isolation circuit that meets the frequency range and voltage isolation requirements of a specific test environment. Models and specifications Standard injection transformer Frequency range: Turns ratio: Size: Voltage rating: Connectors 10Hz to 200kHz with flatness +0dB -3dB 6.3 : 1 31x92x38mm 50V BNC Input Isolated BNC Output PSM1700 testing an SMPS with a standard injection transformer HF injection transformer Frequency range: Turns ratio Size: Voltage rating: Connectors 500Hz to 35MHz with flatness +0dB -3dB 2.3 : 1 31x92x38mm 50V BNC Input Isolated BNC Output HV injection transformer Frequency range: Turns ratio: Size: Voltage rating: Connectors 5Hz to 15MHz with flatness +0dB -3dB 2.3 : 1 31x111x60mm 600V Cat II BNC Input 2 x 4mm safety connector Output Low Frequency Injection Module (LFIM) – Opto isolated active circuit Frequency range: Turns ratio: Size: Voltage rating: Connectors Input power: DC to 100kHz with flatness +0dB -3dB 3.1 : 1 44x110x82mm 600V Cat II BNC Input 2 x 4mm safety connector Output 12V (Universal power adaptor supplied standard) Page 1 of 1