Keysight Technologies M1749B, Руководство по началу работы, Страница: 27 / 43

Getting Started Guide 27
Exterior Features
Instrument-Facing Side
The features of this side of the M1749B are illustrated below.
Figure 3-6 M1749B, instrument-facing features
The features of this side of the M1749B are described in the following table.
When attaching cables to threaded connectors on this panel, use a torque
wrench as described in
“Connector Care” on page 15
.
The installed jumpers (see items 8, 9, 11, and 12 in the table) should be left
permanently in place.
Do not remove the DC input plug from the M1749B while it is in an active state.
Make sure the Status LED on the DUT-facing side of the M1749B is dark
before disconnecting the DC input (Item 6 in the illustration).
Connector Description
(1)
AUX
This multi-pin auxiliary interface is used only by Keysight, for purposes of testing and repair.
(2)
USB
This USB micro B connector provides USB connectivity with an external controller. This is one of
two methods of controlling the M1749B (the other involves use of the Control port, which
incorporates trigger signals). When the USB interface is used, triggering must be accomplished
by means of the Trig1 and Trig 2 ports.
(3)
Trig 2
(4)
Trig 1
These SMB connectors carry trigger inputs and output to the external controller. These ports are
required if the M1749B is controlled by way of the USB port. They are not required if the
M1749B is controlled by way of the Control port, which incorporates trigger signals (however,
even if the Control port is used, these trigger ports remain available for use).
(5)
Control
This SMA port accepts a combined signal which includes both a modem control signal and
trigger signals; it is an alternative to the USB control port described above. As the control
interface incorporates trigger signals, the Trig 1 and Trig 2 ports are not needed when the
Control interface is used (however, they can be used if that is preferred). Torque wrench
required.