Omicron Lab Bode 100 User Manual page 74

Figure 8-3: Thru calibration setup for gain/phase measurement using scope probes.
Hint: If you use external scope probes, you can also adjust the probes manually using the
compensation screw at the probe tip. To do so, perform a continuous gain/phase sweep over
the frequency range of interest and adjust the probe compensation until you receive a flat
0 dB and 0 ° line. Mark the probes with Channel 1 and Channel 2 such that you can re-use
the similarly adjusted probes.
Hint: When measuring a transfer function directly in a circuit you can always check your
calibration by connecting both probes to the same point in the circuit. The result must show
0 dB and 0 °. Please note that this measurement might be influenced by additional noise
from the circuit.
74 OMICRON Lab