
5725A
Instruction Manual
4-18
EEROM
4-26.
A 2Kb X 8 EEROM (U512) stores 5725A calibration constants plus the date and
temperature of calibration. If the rear panel CALIBRATION switch is in the NORMAL
position, the EEROM is software write disabled. The 6303Y reads the CALIBRATION
switch via bit 1 of port 5 and enables the EEROM when the switch is in the ENABLE
position. The EEROM is selected when A15 and A14 are low, A13 is high (2000 through
3FFF), and either RD* or WR* is TRUE. Writing is controlled by bit 2 of port 7 and the
RESET* line.
The 5725A does not automatically format its own EEROM. The 5725A informs the
5700A Calibrator if a problem has been encountered at power-up. The 5700A assumes
responsibility for formatting the 5725A EEROM.
Data Latch
4-27.
The Data Latch (U510) is enabled via LATCHSEL when three conditions are met:
address bit A15 is 0, A14 is 1 (hex 4000-7FFF), and WR* is 0 (true). Data Latch U510 (a
74HCT373) latches information on the external data bus (D0-D7) and sends this
information to the LED latch (U501), Current Amplifier assembly (A2), and the High
Voltage Sense assembly (A6).
Strobe Lines
4-28.
The Current Amplifier (A2) and High Voltage Sense (A6) assemblies tie to the Data
Latch external data bus output with latching relay drivers and/or latches. Information is
strobed into the respective relay drivers/latches by the state of any of the seven strobe
lines. The seven strobe lines (STROBE 1-5,21,22) and a clear line (CLR), all asserted
high, are buffered (U503) outputs on port 6. An additional strobe line called
HVSTROBE, for use by the High Voltage Sense and Power Supply assemblies, is
created from STROBE 2 combined with STROBE 2 ENABLE* and HVSUPPLY*.
Line HVSUPPLY* is generated on the High Voltage Sense assembly. The strobe rate
varies from 50 ms for STROBE 2 to over 100 ms for the other strobe lines. The CLR line
opens all relays except K202.
Led Driver
4-29.
Front panel LEDs are driven by U501, a 74HCT373 latch, which is capable of sinking 35
mA of LED operating current. An output LOW turns an LED on. The LED driver is
selected by bit 7 of port 5, LEDSEL.
Optoisolator Link
4-30.
An optoisolator circuit links the two-channel guard crossing. This guard crossing circuit
and the related 5725A/5700A interconnection reside on the High Voltage Sense
assembly (A6). Serial communication to and from this guard crossing uses the
RECEIVE and TRANSMIT lines, respectively.
When the 5725A is not being used, all cable inputs into the 5700A are tied to the 5700A
guard to shunt noise currents away.
Summary of Contents for 5725A
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Page 62: ...5725A Instruction Manual 4 4 Figure 4 1 5725A Overall Block Diagram...
Page 78: ...5725A Instruction Manual 4 20 aq20f eps Figure 4 3 Current Amplifier Assembly Block Diagram...
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Page 132: ...5725A Instruction Manual 8 6 aq24f tif Figure 8 1 Final Assembly...
Page 133: ...List of Replaceable Parts 8 8 7 aq25f tif Figure 8 1 Final Assembly cont...
Page 134: ...5725A Instruction Manual 8 8 aq26f tif Figure 8 1 Final Assembly cont...
Page 135: ...List of Replaceable Parts 8 8 9 aq27f tif Figure 8 1 Final Assembly cont...
Page 136: ...5725A Instruction Manual 8 10 aq28f tif Figure 8 1 Final Assembly cont...
Page 137: ...List of Replaceable Parts 8 8 11 aq29f tif Figure 8 1 Final Assembly cont...
Page 138: ...5725A Instruction Manual 8 12 aq30f tif Figure 8 1 Final Assembly cont...
Page 139: ...List of Replaceable Parts 8 8 13 aq31f tif Figure 8 1 Final Assembly cont...
Page 141: ...List of Replaceable Parts 8 8 15 5725A 1611 aq36f eps Figure 8 2 A1 Interconnect PCA...
Page 145: ...List of Replaceable Parts 8 8 19 5725A 1650 aq37f eps Figure 8 3 A2 Current Amplifier PCA...
Page 149: ...List of Replaceable Parts 8 8 23 5725A 1661 aq38f eps Figure 8 4 A3 High Voltage Amplifier PCA...
Page 153: ...List of Replaceable Parts 8 8 27 5725A 1631 aq39f eps Figure 8 5 A4 Power Supply PCA...
Page 155: ...List of Replaceable Parts 8 8 29 5725A 1650 aq40f eps Figure 8 6 A5 Digital PCA...
Page 159: ...List of Replaceable Parts 8 8 33 5725A 1601 aq41f eps Figure 8 7 A6 High Voltage Sense PCA...
Page 161: ...List of Replaceable Parts 8 8 35 aq32f tif Figure 8 8 A12 Transformer Enclosure Assembly...
Page 162: ...5725A Instruction Manual 8 36 aq33f tif Figure 8 8 A12 Transformer Enclosure Assembly cont...
Page 163: ...List of Replaceable Parts 8 8 37 aq34f tif Figure 8 8 A12 Transformer Enclosure Assembly cont...
Page 164: ...5725A Instruction Manual 8 38 aq35f tif Figure 8 8 A12 Transformer Enclosure Assembly cont...
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Page 168: ...5725A Instruction Manual 9 2...
Page 169: ...Schematic Diagrams 9 3 9 Figure 9 1 A1 Interconnect PCA 5725A 1611 aq48f eps...
Page 170: ...5725A Instruction Manual 9 4 Figure 9 1 A1 Interconnect PCA cont...
Page 171: ...Schematic Diagrams 9 5 9 Figure 9 1 A1 Interconnect PCA cont...
Page 172: ...5725A Instruction Manual 9 6 Figure 9 2 A2 Current Amplifier PCA 5725A 1650 aq52f eps...
Page 173: ...Schematic Diagrams 9 7 9 Figure 9 2 A2 Current Amplifier PCA cont...
Page 174: ...5725A Instruction Manual 9 8 Figure 9 2 A2 Current Amplifier PCA cont...
Page 175: ...Schematic Diagrams 9 9 9 Figure 9 2 A2 Current Amplifier PCA cont...
Page 176: ...5725A Instruction Manual 9 10 Figure 9 3 A3 High Voltage Amplifier PCA 5725A 1661 aq56f eps...
Page 177: ...Schematic Diagrams 9 11 9 Figure 9 3 A3 High Voltage Amplifier PCA cont...
Page 178: ...5725A Instruction Manual 9 12 Figure 9 3 A3 High Voltage Amplifier PCA cont...
Page 179: ...Schematic Diagrams 9 13 9 Figure 9 4 A4 Power Supply PCA 5725A 1631 aq59f eps...
Page 180: ...5725A Instruction Manual 9 14 Figure 9 4 A4 Power Supply PCA cont...
Page 181: ...Schematic Diagrams 9 15 9 Figure 9 4 A4 Power Supply PCA cont...
Page 183: ...Schematic Diagrams 9 17 9 Figure 9 5 A5 Digital PCA cont...
Page 185: ...Schematic Diagrams 9 19 9 Figure 9 6 A6 High Voltage Sense PCA cont...
Page 186: ...5725A Instruction Manual 9 20 Figure 9 6 A6 High Voltage Sense PCA cont...
Page 187: ...Schematic Diagrams 9 21 9 Figure 9 6 A6 High Voltage Sense PCA cont...
Page 188: ...5725A Instruction Manual 9 22 Figure 9 6 A6 High Voltage Sense PCA cont...
Page 189: ...Schematic Diagrams 9 9 23 aq45f eps Figure 9 7 A12 Transformer Enclosure Assembly...
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