Teledyne LeCroy USB Chief - Users Manual - Manual (Page 93)

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Chief User’s Manual CATC Version 1.7
Use the Power and Connection window to control these settings:
• Device Power
— Current Measure: When On, the cable power towards the downstream
connection is passed through the current measure terminals on the
Breakout Board.
— Voltage Detection: Indicates good or bad voltage at the downstream
connection. The voltage must be at least 4.15V to indicate good.
• Device Connection
— Detach: Breaks the downstream connection.
— Attach: Reconnects the downstream connection.
— Unplug/Replug: Simulates a two-second detachment and reattachment of
the downstream connection.
— Internal Termination: When the downstream connection is detached, you
can control an appearance of a device to the upstream host controller by
terminating the bus inside the USB Chief.
D+ Pull Up: Simulates a full-speed device.
D- Pull Up: Simulates a low-speed device.
• Host Connection
— Detach: The upstream connection is broken and proper termination is
connected downstream to the device. When the host connection is
detached, the USB Chief supplies power to your device. This setting is
essential in preparing your setup for USB traffic generation.
— Attach: The upstream connection is reestablished.
When the host connection is detached, your device enters a suspend state after 3ms
(since no SOFs are being transmitted) and the bus termination floats to the idle
state.
Edit Comment
You can create, view, or edit the 100-character comment field associated with
each Trace file.
Step 1 Select Edit Comment under File on the Menu Bar.
The Edit comment for trace file window appears.
Step 2 Create, view, or edit the comment.