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Theory of Operation
TDS 340A, TDS 360 & TDS 380 Technical Reference
3–13
A2/A3 Option 14 Board
The A2 Option Board has GPIB, RS-232, and Centronics interfaces for external
control and hard copy operations. The A3 board has VGA Video output and
printer power interfaces.
Refer to schematic A2
. Signals travel from the processor board through the
J1 connector to the U2 address decoder. U2 uses lines A15, A16, and A18 to
break incoming addresses to either the RS-232, Centronics, GPIB or option
ROM.
The GPIB circuitry is composed of GPIB controller U8, with transceivers U9
and U10 buffering signals to and from the GPIB on the option board.
Refer to schematic A2
. The RS-232 portion of the board connects to the rear
panel through port J2. Signals travel from the processor board through the J1
connector to the U4 dual asynchronous receiver/transmitter (DUART). The
DUART sends data to the U5 driver/receiver. U5 converts signals from logic
levels on the DUART side to RS-232 levels at the 9-pin connector. From U5,
information goes out port P2.
The Centronics portion of the board connects to the rear panel through the 9-pin
connector J3. Data travels from the processor board through the J1 connector to
register U6 where it is sent out J3. U4 manages control signals. U12 buffers
printer status information to be read through U4.
Refer to schematic A3
. The 9-pin VGA video connector routes auxiliary
HSYNC, VSYNC, and VIDEO signals from main board connector J703 to the
rear panel.
The printer power converter uses switching regulator U1 to c15 V from
the power supply to +8 V output at rear panel connector J2. This provides power
for the Option 3P thermal printer.
A6 Front Panel
The CPU system sends instructions to and receives information from the
Front-Panel Processor on the Front-Panel Board. The Front-Panel Processor
reads the front-panel switches and ports, and reports any change in their settings
to the processor system. The Front-Panel Processor also turns the LEDs on
and off.
The Front-Panel Processor reads the front-panel menu switches and sends any
changes in menu selections to the CPU system. The Front Panel Processor does
not read the ON/STBY button; its signal passes through the Front-Panel Board
and the Main Board to the A20 Low Voltage Power Supply.
The front panel also generates the probe compensation signal.
Содержание TDS 340A
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Страница 12: ...Contents viii TDS 340A TDS 360 TDS 380 Technical Reference ...
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Страница 42: ...Operating Information 2 10 TDS 340A TDS 360 TDS 380 Technical Reference ...
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Страница 49: ...Theory of Operation 3 6 TDS 340A TDS 360 TDS 380 Technical Reference ...
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Страница 82: ...Performance Tests 4 22 TDS 340A TDS 360 TDS 380 Technical Reference ...
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Страница 91: ...Adjustment Procedures 5 8 TDS 340A TDS 360 TDS 380 Technical Reference ...
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Страница 119: ...Removal and Replacement TDS 340A TDS 360 TDS 380 Technical Reference 6 27 Figure 6 15 Low voltage power supply removal ...
Страница 134: ...Troubleshooting 6 42 TDS 340A TDS 360 TDS 380 Technical Reference Figure 6 28 J901 pin 5 signal ...
Страница 140: ...Troubleshooting 6 48 TDS 340A TDS 360 TDS 380 Technical Reference ...
Страница 142: ...Repackaging Instructions 6 50 TDS 340A TDS 360 TDS 380 Technical Reference ...
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Страница 206: ...Electrical Parts List 8 58 TDS 340A TDS 360 TDS 380 Technical Reference ...
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Страница 210: ...TDS 340A 360 380 OPTION BOARD BLOCK DIAGRAM A2 0 ...
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Страница 212: ...OPTION BUS AND GPIB A2 TDS 340A 360 380 1 ...
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Страница 214: ...TDS 340A 360 380 ROM PRINTER AND RS 232 A2 2 ...
Страница 216: ...PRINTER POWER A3 1 TDS 340A 360 380 OPTION 14 ...
Страница 218: ...A5 1 FLOPPY INTERFACE TDS 340A 360 380 ...
Страница 222: ...CPU A6 TDS 340A 360 380 1 ...
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Страница 224: ...A6 TDS 340A 360 380 2 FPP POTS ...
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Страница 226: ...LEDS DRIVER A6 TDS 340A 360 380 3 ...
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Страница 228: ...SWITCHES A6 TDS 340A 360 380 4 ...
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Страница 234: ...ROOT SHEET A11 A12 TDS 340A 360 0 ...
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Страница 236: ...TRIGGERS A11 A12 TDS 340A 360 1 TDS 340A ...
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Страница 238: ...ATTENUATORS A11 A12 TDS 340A 360 2 TDS 340A TDS 340A ...
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Страница 240: ...TRIGGER LOGIC AND TIME INTERPOLATOR A11 A12 TDS 340A 360 3 ...
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Страница 242: ...TIME BASE CONTROLLER A11 A12 TDS 340A 360 4 ...
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Страница 244: ...SAMPLER A11 A12 TDS 340A 360 5 ...
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Страница 246: ...CPU A11 A12 TDS 340A 360 6 TDS 340A ...
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Страница 248: ...DISPLAY A11 A12 TDS 340A 360 7 ...
Страница 252: ...MAIN BLOCK DIAGRAM A13 TDS 380 0 MAIN BOARD 671 3753 00 389 2154 00 ...
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Страница 254: ...TRIGGERS A13 TDS 380 1 ...
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Страница 256: ...ATTENUATORS A13 TDS 380 2 ...
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Страница 258: ...TRIGGER LOGIC AND TIME INTERPOLATOR A13 TDS 380 3 ...
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Страница 260: ...TIMEBASE A13 TDS 380 4 ...
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Страница 262: ...SAMPLER A13 TDS 380 5 ...
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Страница 266: ...DISPLAY A13 TDS 380 7 ...
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Страница 270: ...MONITOR BLOCK DIAGRAM A26 TDS 340A 360 380 0 ...
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Страница 272: ...INPUTS VIDEO AND VERTICAL DEFLECTION A26 TDS 340A 360 380 1 ...
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Страница 286: ...Mechanical Parts List 10 12 TDS 340A TDS 360 TDS 380 Technical Reference ...
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