LeCroy PXA125, Руководство пользователя

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User Manual PXA125
3-58 ArbConnection
Figure 3-35. The Arbitrary & Sequence Panel
Sample Clock The Sample Clock group is comprised of one parameter that controls
the sample clock frequency. Note that the sample clock rate is
programmed in units of S/s (samples per second) and will affect the
Model PXA125 only when it is programmed to output arbitrary or
sequenced waveforms.
To access the required parameter, click on the button until the LED
next to the required parameter turns on. The value that is associated
with the lit LED is displayed on the digital display. You can use the
dial, keyboard, or the [
↑
] [
↓
] keys to adjust the readout to the required
setting. After you modify the reading, press Execute to update the
PXA125 with the new reading.
10 MHz Ref The 10 MHz Ref group is a duplicate of the same group in the Main
Panel. The 10 MHz Ref group provides selection between internal
(CLK10), external, or TCXO references. Click on the Internal button to
select the Internal CLK10 reference, the External button to activate
the external reference input, or the TCXO button to select the better
accuracy and stability option.
CAUTION
By selecting an external reference you are
disabling the internal reference circuit. If you do
not have a 10 MHz reference connected to the
instrument, the output will generate erroneous
frequencies.