336
6000 Series Oscilloscope User’s Guide
8
Reference
Using the 10 MHz reference clock
The
10 MHz REF
BNC connector on the rear panel is provided so
you can:
•
Supply a more accurate sample clock signal to the
oscilloscope, or
•
Synchronize the timebase of two or more instruments.
Sample clock and frequency counter accuracy
The oscilloscope’s timebase uses a built-in reference that has an
accuracy of 15 ppm. This is sufficient for most uses. However, if
you are looking at 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.
Supplying an external timebase reference
When you supply an external timebase reference, the hardware
frequency counter is automatically changed to an 8-digit
counter. In this case, the frequency counter (
Quick
Meas
&
Select
&
Counter)
is as accurate as the external clock.
For more information on the hardware frequency counter, see
“Counter”
on page 244.
To supply a sample clock to the oscilloscope
1
Connect a 10 MHz square or sine wave to the BNC connector
labeled
10 MHz REF
. The amplitude must be between 180 mV
and 1 V, with an offset of between 0 V and 2 V.
C A U T I O N
Do not apply more than ±15 V at the 10 MHz REF BNC connector on
the rear panel or damage to the instrument may occur.
Summary of Contents for InfiniiVision 6000 Series
Page 1: ...Agilent Technologies Agilent InfiniiVision 6000 Series Oscilloscopes User s Guide ...
Page 60: ...60 6000 Series Oscilloscope User s Guide 1 Getting Started ...
Page 126: ...126 6000 Series Oscilloscope User s Guide 3 Viewing and Measuring Digital Signals ...
Page 292: ...292 6000 Series Oscilloscope User s Guide 6 Displaying Data Interpreting Decoded LIN Data ...
Page 314: ...314 6000 Series Oscilloscope User s Guide 6 Displaying Data ...
Page 354: ...354 6000 Series Oscilloscope User s Guide 8 Reference ...
Page 362: ...362 6000 Series Oscilloscope User s Guide 9 ...