BS11Troubleshooting » History » Version 8
dexter, 02/19/2016 10:47 PM
| 1 | 1 | = Troubleshooting = |
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| 2 | |||
| 3 | == Known problems with the LMT connection == |
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| 4 | |||
| 5 | {{{ |
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| 6 | Problem: |
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| 7 | 4 | 'bs11_config' can't get a connection to the BS-11 (no 'LMT LOGON: ACK') |
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| 8 | 1 | ||
| 9 | Solution: |
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| 10 | 2 | The BS-11 is a little bit choosy about the RS232 levels, I discovered some problems |
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| 11 | 4 | with my Dell PC (could receive anything, but no tx). Just switch to an el-cheapo USB |
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| 12 | to Serial adapter, this should solve the problem. |
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| 13 | 5 | dexter | |
| 14 | Some background notes: |
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| 15 | 6 | dexter | We measured the RS232 levels and we found out that the level of our RS232<==>USB Adaptor |
| 16 | is much lower (about +/-6 Volts) than normaly expected (+/-12V). The BS11 transmits at a |
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| 17 | semeliar level (about 8 Volts). This may be an explaination why the BS11 does not like |
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| 18 | the normal (+/-12V) levels. See attached files (Lmt_*) for oscilloscope screenshots. |
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| 19 | |||
| 20 | Maybe a simple voltage-devider at TX on the PC side will also solve the problem... |
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| 21 | |||
| 22 | 1 | }}} |
