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Programming Guide 1-13

ESG Family Signal Generators Preparing for Use

Overview of Serial Interface (RS-232) Programming

Selecting the Baud Rate

In order to successfully transfer information between the interface card and a peripheral,

the interface and peripheral must be set to the same baud rate. A CONTROL statement to

one of the following values:

For example, to select a baud rate of 9600, the following program statement is used:

Use of values other than those shown may result in incorrect operation.

To verify the current baud rate setting, use a STATUS statement addressed to register 3.

All rates are in baud (bits/second).

Setting Character Format and Parity

CONTROL Register 4 overrides the Line Control switches that control parity and

character format. All bits in this table correspond to equivalent switch settings on the

HP 98626 and HP 98644 serial interface cards. A 1 is the same as set. To determine the

value sent to the register, add the appropriate values selected from the following table.

For example, to configure a character format of 8 bits per character, one stop bit, and

disabled parity, with XON/XOFF; use the following CONTROL statement:

300 1200 2400 4800 9600 19 200

1190 CONTROL Sc,3;9600

Table 1-6 Character Format and Parity Settings Handshake

Handshake

(Bits 7 & 6)

Parity Enable

(Bit 3)

Stop Bits

(Bit 2)

Character Length

(Bits 1 & 0)

01 Xon/Xoff

Bidirectional 11

Handshake Disabled

0 Disabled 0 One stop bit 11 Eight bits/char

1200 CONTROL Sc,4;IVAL(“10011”,2)

-or-

1200 CONTROL Sc,4;19

1 2 ... 12 13 14 15 16 17 18 19 20 21 22 ... 258 259

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Agilent Technologies ESG Especificaciones Pagina 17