LK5: Configuration Auto-Sense
This setting determines whether the host can automatically sense
the configuration of the Applique. The operation of the Applique is not
affected by this jumper setting. Auto-sense should be enabled when
operating in 75 Ohm (unbalanced) mode. Current interface standards
do not list this feature for 120 Ohm (balanced) mode.
LK5
Setting
Strap On
Auto-sense enabled
Strap Off
Auto-sense disabled
LK6 & LK7: 75 Ohm Termination Impedance
This jumper sets the termination impedance correctly for 75 Ohm
operation. Both jumpers must be in place when operating in 75 Ohm
(unbalanced) mode. Conversely, both jumpers must be removed when
operating in 120 Ohm (balanced) mode.
LK6
LK7
Setting
On
On
75 ohm operation
Off
Off
120 ohm operation
3.3 POWER SUPPLY OPTIONS
The Model 2703-X21 is available with three power supply options:
The
Standard power supply option (Model 2703-X21 or 2703-X21-
230) is factory configured for either 115 or 230 VAC, depending on
how the product is ordered, and is available with a variety of
domestic and international power cords (see Appendix C).
The
Universal Interface power supply option (Model 2703-X21-UI)
operates in environments ranging from 85 to 265 VAC, with no re-
configuration necessary (see Appendix C for available domestic
and international power cords).
The
DC power supply option (Model 2703-X21-DC) operates in 48
VDC environments and is equipped with a 3-pin “terminal strip”
style DC power cord.
9
10
WARNING!
There are no user-serviceable parts in the
power supply section of the Model 2703-X21. Voltage
setting changes and fuse replacement should only be
performed by qualified service personnel. Contact
Patton Electronics Technical support at (301)975-1007 for
more information.
