Chapter 2---System Description
GRN_THRES | Similar to RED_THRES |
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BLU_THRES | Similar to RED_THRES |
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I/O | DESCRIPTION |
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IIC_DATA | IIC data line. Bidirectional serial line for synchronous data |
| transfer between SCB and other circuit boards. See detailed |
| description for list of signals transferred and data direction |
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IIC_CLK | IIC clock line. Unidirectional clock line for control of |
| synchronous data transfer over IIC bus. |
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IIC_INT | Interrupt output to SCB |
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| Raster Timing Generator |
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| INPUT | DESCRIPTION |
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| CLAMP | Pulse signal input from the RTG board. Indicates the commanded |
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| timing and duration of the DC RESTORE. |
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| BLANKING | Pulse signal input from the RTG board. Indicates the commanded |
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| BLANKING interval during the scan. |
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| OUTPUT | DESCRIPTION |
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| H_SYNC | Horizontal sync signal to RTG board |
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| V_SYNC | Vertical sync signal to RTG board |
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| GRN_SYNC | Green sync signal to RTG board |
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| GRN_INPUT | Green video signal to RTG board |
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| Video Amplifier |
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| INPUT | DESCRIPTION |
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| RED_BEAM | Voltage signal proportional to cathode current averaged |
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| over several horizontal lines in the red CRT. Voltage |
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| level is + mV/∝A |
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| GRN_BEAM | Similar to RED_BEAM |
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| BLU_BEAM | Similar to RED_BEAM |
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| /VA_OK | Issued from the VAB to indicate VAB working properly |
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Model 200 Service Manual |
