Elecraft PX3 Owner's Manual - Manual (Page 22)

22
Advanced Operating Features
Remote-Control Commands
Many PX3 functions may be accessed by remote-
control commands sent via RS232. These
commands use ordinary ASCII text, so they can be
tested using a terminal emulator or the Command
Tester tab in PX3 Utility. When the PX3’s XCVR
RS232 port is connected to a KX3, then both PX3
and KX3 commands may be sent and received via
the PC RS232 port.
To distinguish them from KX3 commands, PX3
commands begin with the “#” symbol. For example,
“#RVM;” returns the PX3 firmware revision and
“RVM;” returns the KX3 main firmware revision.
PX3 remote-control commands are fully described
in the PX3 Programmer’s Reference.
PX3 Utility Program
In addition to downloading firmware (page 23) the
PX3 Utility can perform several other functions.
For example, it can upload a bitmap image of the
PX3 display which can be saved to a file or pasted
into a graphics program on the computer. Refer to
the Help menu in PX3 Utility for more information.
Configuring the Power Switch
The front panel P W R switch may be bypassed so
the PX3 turns on when power is applied.
To configure the power control, loosen the four
thumb screws and remove the PX3 bottom cover.
The jumper is located near the edge of the Power
Supply (PS) board as shown in
Figure 17 .
Figure 17. Power Control Jumper.
The jumper may be positioned on the pins as
follows:
Pins 3 & 4: Normal operation of the P W R switch.
The jumper is shown in this position in Figure 17 .
Pins 1 & 2: P W R switch is disabled. PX3 turns on
automatically and remains on as long as power is
applied to the rear panel connector.
Even if bypassed so power is on all the time, the
P W R switch is still used in the event it is necessary
to put the PX3 in Boot Loader mode to force a
firmware download. To cancel Boot Loader mode,
remove power from the PX3.