Valhalla Scientific 4300C, Руководство по эксплуатации

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Connecting to a Computer
A personal computer with a COM port is essential to operate the 4300C via RS232 interface.
The connections between 4300C and computer are as follows:
I. Connect one end of a RS232 cable to the computer.
II. Connect the other end of the cable to the RS232 port on the 4300C.
III. Turn on the 4300C.
IV. Turn on the computer.
Checking Connections
If you want to test whether the RS232 connection is working or not, you can send a command from the
computer. For instance, using a terminal program send the query command
*idn?
Should return the Manufacturer, model number, serial number, and firmware version in the following
format:
VALHALLA SCIENTIFIC 4300C,1.81,0"
If you do not receive a proper response from the 4300C, please check if the power is on, and all cable
connections are active.
INPUT AND OUTPUT QUEUE
The design of 64 bytes input queue and 128 bytes output queue for storing the pending commands or
return messages is to prevent the transmitted commands of remote control and return messages from
missing. As the maximum stored capacity for Error/Event
Queue is 20 groups of messages; it should be noted that input data exceeding the capacity by using these
buffers will cause data missing.
COMMANDS AND SYNTAX
RS232 message terminators
As there is no signal of end message on RS232 bus, therefore, use LF, CR, or CR/LF as message terminator.
After the 4300C processes a command a CR/LF is placed in the output buffer and delivered. As for query
command, the return message of the instrument is also added a LF for PC to judge message terminator.
Entering Commands
The standards that govern the command set for the 4300C allow for a certain amount of flexibility when
you enter commands. The 4300C does not adhere to any friendly listening standards so the commands
and queries must be typed as specified.
Command Characters
The 4300Cs are not sensitive to the case of command characters. You can enter commands in either
uppercase or lowercase.