PURPOSE:To attain accurate program rating measurement even when a VTR and a TV set are used in combination by providing a detection means of VTR recording and reproduction and a power supply detection means for the VTR and TV set so as to discriminate the operating state of the VTR into four modes of off/monitor/reproduction/video recording. CONSTITUTION:An FM luminance signal of a video recording circuit and a reproduction circuit is detected by pickup coils PC1, PC2 of a VTR, amplified by amplifier circuits 2, 6, and after the output is smoothed into DC by detection circuits 3, 7, the result is compared with reference voltages VREF1, VREF2 by comparator circuits 4, 8. Thus, whether the mode is in the video recording mode or the reproduction mode is discriminated. On the other hand, after a current produced in the secondary winding of current transformers CT1, CT2 of the AC power line of the VTR, TV is smoothed into a DC by rectifier circuits 9, 11, the result is subject to waveform shaping by comparators COM3, COM4 of comparator circuits 10, 12, the result is synthesized with signals SREC and SPLY via a gate circuit 13 and a signal SMON representing the monitor mode is obtained.
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