In order to ensure error-free and correct data transmission, the parameters
of the instrument and the controller must be set identically. The parameters
of the RS-232 interface can be set in the Setup - Remote menu or
using the command group SYSTem:COMMunicate...
Transmission parameters of the RS-232 interface
| Parameter | Default | Description / Parameter Range |
| Baud rate | 19200 Baud | The instrument allows baud rates between 110 and 115200 baud to be set, see Remote-control Settings - Setup-Remote |
| Data bits | 8 | Data transmission is in the 7- or 8-bit ASCII code, starting with the least significant bit (LSB). |
| Start bit (no setting parameter) |
1 | Each data byte begins with a start bit. The falling edge of the start bit indicates the beginning of the data byte. |
| Parity bit | None | A parity bit can be transmitted for error protection. The settings No parity, even or odd parity are allowed. |
| Stop bit | 1 | Transmission of a data byte is terminated by one or two stop bits. The sum of data bits and stop bits must be equal to 9. |
Example:
Transmission of character 'A' (41 Hex) in 8-bit ASCII code with even parity and one stop bit:
