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HDO9000 High Definition Oscilloscopes Operator's Manual
Signal Interfaces
The instrument offers a variety of interfaces for using probes or other devices to input analog or
digital signals.
See the product page at teledynelecroy.com for a list of compatible devices.
Analog Inputs
A series of connectors arranged on the front of the instrument are used to input analog signals on
channels 1-4. EXT can be used to input an external trigger pulse or sample clock signal.
HDO9000 channel connectors use the ProBus interface. The ProBus interface contains a 6-pin power
and communication connection and a BNC signal connection to the probe. It includes sense rings for
detecting passive probes and accepts a BNC cable connected directly to it. ProBus offers 50 Ω and 1
MΩ input impedance and control for a wide range of probes.
The channel interfaces power probes and completely integrate the probe with the channel. Upon
connection, the probe type is recognized and some setup information, such as input coupling and
attenuation, is performed automatically. This information is displayed on the Probe Dialog, behind the
Channel (Cx) dialog. System (probe plus instrument) gain settings are automatically calculated and
displayed based on the probe attenuation.
Probes
The oscilloscope is compatible with the included passive probes and most Teledyne LeCroy active
probes that are rated for the instrument's bandwidth. Probe specifications and documentation are
available at teledynelecroy.com/probes.
Passive Probes
The passive probes supplied are matched to the input impedance of the instrument but may need
further compensation. Follow the directions in the probe instruction manual to compensate the
frequency response of the probes.
Active Probes
Most active probes match probe to oscilloscope response automatically using probe response data
stored in an on-board EEPROM. This ensures the best possible combined probe plus oscilloscope
channel frequency response without the need to perform any de-embedding procedure.
Be aware that many active probes require a minimum oscilloscope firmware version to be fully
operational. See the probe documentation.
LBUS Interface
The LBUS (LeCroy Peripheral Bus) interface provides precise timing synchronization between the
oscilloscope and external devices. It can be used with the optional 8-CH-SYNC for synchronization
with other instruments or the HDA125-xx-LBUS for high-speed digital analysis and triggering.
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