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6.3 CONNECTING THE 4176 VIA RS232 INTERFACE
6.3.1 The RS232 interface capabilities:
The RS232 interface provides a point-to-point connection between two items of
equipment such as a computer and the 4176. There are some parameters you need to set
on the both sides. Once you have set these parameters, you can control the 4176 through
the RS232 interface.
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Baud rate: 9600 baud.
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Parity bit: none.
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Data bit: 8 bits.
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Stop bit: 1 stop bit.
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Data flow control: none.
6.3.2 Notes for RS232 installation
The 4176 is a DCE (Data Channel Equipment) device with a 9-pin D-type shell RS232
connector located on the rear panel. Table 14 shows the 9-pin connector (Female) with
its pin number assignments. Figure 17 shows the wiring configuration for DB9 to DB9.
When the 4176 is set up with a RS232 interface, please check the following points:
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Many devices require a constant high signal on one or more input pins.
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Ensure that the signal ground of the equipment is connected to the signal ground of
the external device.
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Ensure that the chassis ground of the equipment is connected to the chassis ground of
the external device.
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Do not use more than 15m of cable to connect devices to a PC.
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Ensure the same baud rate is used on the device as the one used on PC terminal.
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Ensure the connector for the both side of cable and the internal connected line are
met the demand of the instrument.
