To Supply A Sample Clock To The Oscilloscope; Maximum Input Voltage At 10 Mhz Ref Connector - Agilent Technologies InfiniiVision 4000 X-Series User Manual

20
Utility Settings
• Synchronize the timebase of two or more instruments.
Sample clock and The oscilloscope's timebase uses a built- in reference that has an accuracy
frequency of 15 ppm. This is sufficient for most uses. However, if you are looking at
counter accuracy a window that is very narrow compared to the selected delay (for
example, looking at a 15 ns pulse with the delay set to 1 ms), significant
error can be introduced.
Using the built- in sample clock, the oscilloscope's hardware frequency
counter is a 5- digit counter.
See
Supplying an
When you supply an external timebase reference, the hardware frequency
external timebase
counter is automatically changed to an 8- digit counter. In this case, the
reference frequency counter ([Meas] > Select > Counter) is as accurate as the external
clock.
See
page 339.
For more information on the hardware frequency counter, see
"Counter"

To supply a sample clock to the oscilloscope

1 Connect a 10 MHz square or sine wave to the BNC connector labeled
C A U T I O N
Do not apply more than 20 dBm Max (6.32 Vpp Max) at the 10 MHz REF BNC connector
on the rear panel or damage to the instrument may occur.
2 Press [Utility] > Options > Rear Panel > Ref Signal.
3 Use the Entry knob and the Ref Signal softkey to select 10 MHz input.
A locked padlock icon appears at the top of the display.
338
"To supply a sample clock to the oscilloscope"
"To synchronize the timebase of two or more instruments"
on page 256.
10 MHz REF. The amplitude must be from - 5 dBm to 17 dBm
(356 mVpp to 4.48 Vpp).

Maximum input voltage at 10 MHz REF connector

Agilent InfiniiVision 4000 X-Series Oscilloscopes User's Guide
on page 338.
on