HP 1650B User Manual

Data Bits Data bits are the number of bits sent and received per character that
represent the binary code of that character. Characters consist of either 7
or 8 bits, depending on the application. The HP 1650B/51B supports 8 bit
only.
8 Bit Mode. Information is usually stored in bytes (8 bits at a time). With
8-bit mode, you can send and receive data just as it is stored, without the
need to convert the data.
*’
Note ‘&
The controller and the HP 1650B/51B must be in the same bit mode to
properly communicate over the RS-232C. This means that the controller
must have the capability to send and receive 8 bit data.
For more information on the RS-232C interface, refer to the
HP 1650BlHP 165lB Front-Panel Reference Manual. For information on
RS-232C voltage levels and connector pinouts, refer to the
HP 165OBfHP 165IB Service Manual.
COfTlmUtlka~it’l~ Each RS-232C interface card has its own interface select code. This code
Over the -
is used by the controller to direct commands and communications to the
RS-232C Bus
proper interface by specifying the correct interface code for the device
address.
(HP 9000
Series 200/300
Generally, the interface select code can be any decimal value between 0
Controller)
and 30, except for those interface codes which are reserved by the
controller for internal peripherals and other internal interfaces. This
value can be selected through switches on the interface card. For more
information, refer to the reference manual for your interface card or
controlIer.
For example, if your RS-232C interface select code is 9, the device
address required to communicate over the RS-232C bus is 9.
Programming Over RS-232C
3-6
HP 1650B/HP 16518
Programming Reference

HP 1650B Specifications

General

Brand	HP
Model	1650B
Category	Measuring Instruments
Language	English