Acquisition and waveform setup
R&S
®
RTP
146User Manual 1337.9952.02 ─ 12
"Active probe"
Shows the type of the probe that is connected to the selected chan-
nel.
"Probe group
delay"
Shows the result of the probe skew measurement on the selected
channel.
Remote command:
PROBe<m>:SKEState on page 1248
Total skew offset
If Extend user skew is disabled, the sum of the measured "Probe group delay" and the
"Skew offset" is shown. If "Use skew offset" is disabled, the skew offset is ignored.
If Extend user skew is enabled, only the probe skew is shown, and the skew offset is
always ignored.
Extend user skew
Allows you to set higher value in "Skew offset" to compensate for the delay of the mea-
surement setup. Without extension, the deskew range is ±100 ns, and delays shorter
than the sample interval can be compensated.
With extension, the maximum delay is ±1 s, and the instrument can compensate com-
plete samples. Compensation takes effect after the trigger. The maximum number of
acquisitions in the memory is reduced.
Use the extended skew range to compare signals: One signal goes directly from the
generator to the scope, and the other signal goes from the generator through the DUT
to the scope. The delay of the DUT is higher than ±100 ns.
Remote command:
CHANnel<m>:SKEW:EXTended on page 1248
5.3.2 Reference clock (OCXO)
Access: "Menu" > "Horizontal" > "Setup" tab > "Skew" > "Reference clock" tab.
The oven-controlled crystal oscillator (OCXO) produces a 10 MHz internal reference
signal with precise and stable frequency. With OCXO, you can also use an external ref-
erence signal. The input and output connectors for the external reference signal are on
the rear panel alongside the external trigger input.
Detected
Indicates if the OCXO is detected by the instrument.
Oven hot
Indicates when the oven has reached its nominal temperature and is operating with the
specified accuracy.
External reference
Sets the frequency of an external reference input signal that is connected to the exter-
nal reference input on the rear panel of R&S RTP. A frequency range from 1 MHz to 20
MHz is supported.
Horizontal accuracy
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