comparison: content/hp34970a_protocol.rst
content/hp34970a_protocol.rst
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| 23 | 23 |
| 24 - A3 is the backplane on which I/O modules are plugged, | 24 - A3 is the backplane on which I/O modules are plugged, |
| 25 | 25 |
| 26 - A4 is the (optional) internal 6.5 digits DMM. | 26 - A4 is the (optional) internal 6.5 digits DMM. |
| 27 | 27 |
| 28 .. image:: {filename}/images/hp34970a/block_diagram.svg | 28 .. image:: {static}/images/hp34970a/block_diagram.svg |
| 29 :alt: System Block Diagram of the HP34970A. | 29 :alt: System Block Diagram of the HP34970A. |
| 30 | 30 |
| 31 | 31 |
| 32 The commnucation between the different system blocks is done with | 32 The commnucation between the different system blocks is done with |
| 33 asynchronous serial links. They use the rather uncommon bit rate of | 33 asynchronous serial links. They use the rather uncommon bit rate of |
| 176 character is displayed by a main 14-digits, and the punctuation with 3 | 176 character is displayed by a main 14-digits, and the punctuation with 3 |
| 177 segments (2 dots and a comma, allowing to represent the signs ".", | 177 segments (2 dots and a comma, allowing to represent the signs ".", |
| 178 ",", ":" and ";"). Punctuation signs are also very close to the | 178 ",", ":" and ";"). Punctuation signs are also very close to the |
| 179 preceding chracters. | 179 preceding chracters. |
| 180 | 180 |
| 181 .. image:: {filename}/images/hp34970a/digit.jpg | 181 .. image:: {static}/images/hp34970a/digit.jpg |
| 182 :alt: 17-segments digit of the main display. | 182 :alt: 17-segments digit of the main display. |
| 183 | 183 |
| 184 The command used to send text to the main display is ``0x00``. The | 184 The command used to send text to the main display is ``0x00``. The |
| 185 character ``0x09`` (tabulation) has a special meaning: it marks the | 185 character ``0x09`` (tabulation) has a special meaning: it marks the |
| 186 beginning and the end of a part of the text to be displayed darker | 186 beginning and the end of a part of the text to be displayed darker |
| 193 ==================================== | 193 ==================================== |
| 194 | 194 |
| 195 This area only allows to display 3 7-segments digits. The command is | 195 This area only allows to display 3 7-segments digits. The command is |
| 196 ``0x0C``, the payload is thus 3 bytes long. | 196 ``0x0C``, the payload is thus 3 bytes long. |
| 197 | 197 |
| 198 .. image:: {filename}/images/hp34970a/channel.jpg | 198 .. image:: {static}/images/hp34970a/channel.jpg |
| 199 :alt: The display area dedicated to current channel. | 199 :alt: The display area dedicated to current channel. |
| 200 :align: center | 200 :align: center |
| 201 | 201 |
| 202 Flags | 202 Flags |
| 203 ===== | 203 ===== |
