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GRASS Help System |
This file covers how to set up the hardware for an Altek digitizer with an AC-30 controller. It includes set up instructions for the AC-30 controller, the cabling to the digitizer and a help section for problems. At the bottom of this file there is a description of the AC-40 controller switch settings; but beware -- these are untested.
On CERL's AC-30 controller the switches are inside the controller itself. It is necessary to remove 4 screws and the cover to reach the switches. There are two banks of eight switches. Switch settings are:
What these switch settings give us is:
The cabling between the digitizer and the computer differ for different computers. Some known cable configurations are given below:
2 ---- 3
3 ---- 2
4 ---- 5
5 ---- 4
7 ---- 7
2 ---- 3
3 ---- 2
4 ---- 5
5 ---- 4
7 ---- 7
| |
+-8 ---- 20 |
|
20 ---- 8--+
2 ---- 3
3 ---- 2
4 ---- 5
5 ---- 4
7 ---- 7
8 |
20 _|
Masscomp cable has 2 and 3 switched, 4 and 5 switched, 7 straight thru, and on the computer side 6, 8, and 20 are looped together.
If the v.digit program isn't working make sure that the tty the digitizer is on has the getty off, the tty permissions set to 'crw-rw-rw', the 'digitcap' file is correct for your system configuration, and the switch settings on the digitizer are correct. There are some diagnostic programs under $GISBASE/src/mapdev/digitizers/altek/Diagnostics. Read the README file in the Diagnostics directory for specific information on the programs. If none of the programs work, there is something wrong with either the cabling or the digitizer.
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I have two differents sets of digitizers switch setting for the AC-40 controller. If one set doesn't work, try the other.
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8 0 - 9600 | 0 - Mode
7 0 - | | 0 - |
6 1 - | | 0 - Stream
5 1 - | | 0 - |
4 1 - 2 stop | 0 - Strm. Value
3 0 - Dis par | 0 - |
2 1 - Even | 1 - |
1 1 - 8 bits | 0 - |
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8 1 - Output | 1 - Binary 2
7 1 - | | 0 - Standard
6 1 - | | 0 - Run Type
5 0 - English | 1 - |
4 0 - No LF | 0 - Serial
3 0 - Dis sign | 0 - DTR1 off
2 1 - X on | 0 - DTR2 off
1 1 - En Host | 1 - Reserved
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