UNAOHM
EP2500 (Rev. 0)
37
⇒
NOTE:
The apparent contradiction (Rx = Output and so on ) is due to the fact that the EP 300 has
a DCE (Data Communication Equipment) layout. This is why it requires a non inverted connection
cable to the computer
.
Figure 18
RS232 pin location
7.22.2
Transmission Format
See Chap. 7.20.6.1. Keep in mind:
•
To enter the DATA menu, press
DATA (19)
.
•
Once the settings have been programmed, press
EXIT
to exit.
7.22.3
General Notes for Connection to a Personal Computer
•
The instrument has a DCE (Data Communication Equipment) layout.
•
The connection should be carried out in the Full Duplex mode since, the instrument supplies input
data echo character by character.
•
In case of an error while digitising on the command line it is possible to use the backspace character
correction.
•
The command line is carried out on reception of the character “Carriage Return” (decimal 13,
hexadecimal 0D).
•
The instrument uses, if they are connected, the handshake lines RTS and CTS.
•
An accuracy check is carried out on the command, but not on the data. For example:
QX27
↵
is not accepted (the command QX does not exist).
FQ560.25
↵
programs the tuning frequency on 560.25 MHz.
FQ4yg.1a
↵
programs a random frequency.
7.23
USB PORT CONNECTION
Like the RS232 serial port, it is possible to connect the instrument to a Personal Computer or other
devices.
7.23.1
How to Load USB Drivers onto a PC
The first time you connect your instrument to a PC through the USB port, USB drivers must be loaded
first (on purchasing the instrument a USB drivers disk is given as a standard accessory).
Proceed as follow:
•
Make sure the USB socket is disconnected from the PC:
•
Load the disk provided and double click on “HidComInst.exe”. The operation loads the appropriate
drivers onto the system even if it may appear no program has been loaded or launched.
•
Switch the instrument on and connect it through the USB cord to your PC. The PC automatically
initiates the installation of the new hardware (the USB port in this instance).
•
Once the installation is complete, the PC assigns the USB port the first free COM (for example, if
COM 1 and COM 2 are installed, the USB will be associated to COM 3 automatically).
