glossary:glossary_b
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| glossary:glossary_b [2019/09/05 17:31] – [Baud] Clarify. Also link to Cnet is no longer working tgerbic | glossary:glossary_b [2020/09/14 14:43] – [Block Control] grovenor | ||
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| - | Back EMF generally refers to the voltage that will appear across an inductor if the current is stopped suddenly | + | Back EMF generally refers |
| [[: | [[: | ||
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| ===== Baud ===== | ===== Baud ===== | ||
| - | Baud in communications refers to changes per second. In the very early days of MODEMs, for example, each bit sent equaled a single change, so baud equaled bits per second (BPS). The terms were initially interchangable. As newer modulation methods (the way the signal is sent or encoded) came along a baud represented more than one bit per second. For example a single baud may have represented two, three or four bits for each change. From that point forward, baud and BPS were no longer the same, though many people still use them interchangably. For the sake of clarity, use BPS to represent the number of bits sent per second. | + | Baud in communications refers to changes per second. In the very early days of MODEMs, for example, each bit sent equaled a single change, so baud equaled bits per second (BPS). The terms were initially interchangable. As newer modulation methods (the way the signal is sent or encoded) came along a baud represented more than one bit per second. For example a single baud may have represented two, three or four bits for each change. From that point forward, baud and BPS were no longer the same, though many people still use the terms interchangably. For the sake of clarity, use BPS to represent the number of bits sent per second.\\ |
| + | [[wp> | ||
| ===== BC3 ===== | ===== BC3 ===== | ||
| - | The BC3 is an automatic block control system otherwise known as SuperBloc (QV). It controls the speed of a model train depending on the occupation of the block ahead. If the block ahead is occupied the train will slow to a creep speed and stop at a designated point. Otherwise the train will accelerate to a preset speed. Manual control is also allowed for. Kits for the [[: | + | The BC3 is an automatic block control system otherwise known as SuperBloc (QV). It controls the speed of a model train depending on the occupation of the block ahead. If the block ahead is occupied the train will slow to a creep speed and stop at a designated point. Otherwise the train will accelerate to a preset speed. Manual control is also allowed for. Literature |
| - | The BC3 kit is No38 Nos 39 and 40 are a test jig and a setting up kit. Kit instructions for 38 and 39 are available from MERG.\\ | + | although kits have been discontinued. |
| - | [[https:// | + | [[: |
| - | [[: | + | |
| ===== Bell signals ===== | ===== Bell signals ===== | ||
| - | Bell Signals were used to convey information | + | Bell Signals are used as part of a block signalling protocol. |
| - | [[http://www.signalbox.org/ | + | |
| + | The cadence of the Bell Signals were used to convey information. | ||
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| + | Though there are some commonly used bell signals, different railways at different times have had their own signaling schemes. | ||
| + | \\ | ||
| + | [[https:// | ||
| ===== BGA ===== | ===== BGA ===== | ||
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| - | Block control is the philosophy that a railway should be divided into blocks and that no train should normally be allowed to enter a block which is already occupied. This means that each block has a stop signal at which a train is required to wait if the block ahead is occupied. This will be set back 0.25 mile from the start of the next block. Further back there will be a distant signal which informs the driver that he needs to slow because the signal ahead is at stop.\\ | + | Block control is the philosophy that a railway should be divided into blocks and that no train should normally be allowed to enter a block which is already occupied. This means that each block has a stop signal at which a train is required to wait if the block ahead is occupied. Further back there will be a distant signal which informs the driver that he needs to slow because the signal ahead is at stop.\\ |
| Modern electric signalling systems allow for more variation in slow signals with the a double yellow as a preliminary caution as well as the yellow caution to give two stages of slowing.\\ | Modern electric signalling systems allow for more variation in slow signals with the a double yellow as a preliminary caution as well as the yellow caution to give two stages of slowing.\\ | ||
| [[http:// | [[http:// | ||
glossary/glossary_b.txt · Last modified: 2022/10/10 21:55 by Bob Vetterlein