The TBCP1_CAL, TBCP2_CAL, TBCP3_CAL and TBCP4_CAL are calibration fixtures that correspond to the TBCP1, TBCP2, TBCP3 and TBCP4 series RF current monitoring probes and ensure the transfer impedance of RF current monitoring probes.
Each Tekbox RF current measurement probe is supplied with a corresponding calibration sheet that contains the values of the transfer impedance as a function of frequency. So there is no acute need to purchase a calibration fixture together with the probe. Calibration fixtures can be used for periodic inspection of the probes or for health checks in case a probe has been dropped and there is a suspicion that its ferrite core has been damaged.
For the TBCP2 series current monitoring probes DC to 750 MHz.