Measuring Waveforms
3–150 TDS 500C, TDS 600B, & TDS 700C User ManualTable 3–13: Probe cal status
be al 1
Uea i
Type probe connected2
Pro
be
C
al
’d?
1
U
s
e
r
a
ct
i
on Simple interface3TEKPROBE interface4
No Doesn’t Matter Initialized Initialized
Yes Power off Initialized
(probe data is retained) Initialized
(probe data is retained)
Yes Power on Can not detect differ-
ent probe: Display Re-use Probe
Calibration Data menu Cal’d Probe: Pass
Different probe: Initialized Different probe: Initialized
Yes Disconnect Probe Initialized Initialized
Yes Connect Probe Can not detect differ-
ent probe: Display Re-use Probe
Calibration Data menu Cal’d Probe: Pass
Different probe: Initialized Different probe: Initialized
1Refers to a channel input that was successfully compensated at the time Probe Cal was last executed for the input channel.
2If no probe is connected, the probe status in the vertical main menu is always initialized.
3A probe with a simple interface is a probe that can convey very limited information to the oscilloscope. Most passive
probes (such as the P6139A) have simple interfaces.
4A probe with a TEKPROBE interface is a probe that can convey additional information. For instance, it might automatical-
ly set the oscilloscope input channel impedance to match the probe, send the oscilloscope a unique probe identification
number, and so on. Some optical probes and most active probes (such as the P6205) have TEKPROBE interfaces.