Remote Control; Rs-232; Usb; Ethernet (Option Ho730) - Hameg HMS-X Benutzerhandbuch

12 Remote Control

The HMS-X is basically supplied with an HO720 USB/
RS-232 interface. The respective drivers are available on
the enclosed product CD or can be downloaded at http://
www.hameg.com.
To establish a basic communication a serial cable (1:1) as
well as a terminal program like Windows HyperTerminal
is required. The Windows HyperTerminal program is part
of any Windows operating systems. A detailed instruction
how to setup a basic communication using HyperTerminal
is available at the HAMEG Knowledge Base at http://www.
hameg.com/hyperterminal.
The HMS-X uses SCPI (= Standard Commands for Pro-
grammable Instruments) for remote control. Remote con-
trol is possible via the built-in dual interface USB/RS-232
(options: Ethernet/USB, IEEE-488). This allow access to ne-
arly all functions which are available on the front panel. A
detailed document about the provided SCPI commands is
available at http://www.hameg.com.

12 . 1 RS-232

Fig. 12.1: Pin Assignment RS-232

The RS-232 interface is made as a 9 pole D-SUB connec-
ter. Over this bidirectional interface you can transfer set-
tings, data and screen dumps from an external device (PC)
to the spectrum analyzer or vice versa. The direct physical
link between the instrument and serial port of the PC can
be done via an 9 pole cable with shielding (1:1 wired). The
maximal length must below 3 meter.
The exact pinning oft he plug is as follows:
2 Tx Data (Data from the HAMEG device to the PC)
3 Rx Data (Data from the PC to the HAMEG device)
7 CTS Ready to send
8 RTS Ready to receive
5 Ground (Reference potential connected via the HAMEG
instrument of safety class I with the line cord and thus
to the safety earth of the wall outlet)
9 +5 V Supply voltage for external devices (max. 400
mA)
The maxiaml amplitude at Tx, Rx, RTS und CTS is ±12 Volt.
The standard RS-232 settings are:
8-N-1 (8 data bits,no parityt, 1 stop bit),
RTS/CTS-Hardwareprotocol: none.
In order to set these parameter at the instrument, please
press the SETUP key and choose the menu item Interface.
Make sure that the RS-232 interface is chosen. The soft-
menu Parameter opens a menu where you can set all para-
meters for the RS-232 communication.

12 .2 USB

All descriptions regarding the USB interface are true for the
HO720 interface card as well as for the optional HO730 USB part.
All currently available USB driver are fully tested, functional and
released for 32 Bit and 64 Bit Windows™ systems.
The USB interface must be chosen in the instrument and
does not need any setting. At the first connection Win-
dows™ ask for a driver. The driver you can find on the en-
closed product CD or on our homepage www.hameg.
com at the download area for the HO720/HO730. The con-
nection can be done via the normal USB or via the virtual
COM port (VCP). The description how to install the driver
you can find in the HO720/HO730 installation manual.
If the virtual COM port (VCP) will be used, you must set USB as
interface at the spectrum analyzer. On PC side the VCP has to be
activated in the device manager.

12 .3 Ethernet (Option HO730)

In addition to the USB interface, the interface card HO730
includes an Ethernet interface. Configure the settings in
the oscilloscope for all necessary parameters after you se-
lect ETHERNET as interface and press the soft menu key
PARAMETER. You can specify all parameters and assign a
fixed IP address. You can also assign a dynamic IP address
with the activated DHCP function. Please contact your IT
management to con-figure the settings properly.
If DHCP is used and the HMS does not get any IP adress (f.e. if no
ethernet cable is connected to the scope or the network does not
support DHCP) it may take up to three minutes until a time out
make the interface available again for configuration.
If the device has an IP address, it can be accessed via
web browser at this IP since the HO730 includes an inte-
grated web server. Enter the IP address in the location bar

Fig. 12.2: Webserver

Remote Control
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