![EEROM](/images/new-backgrounds/15349/15349151x1.webp)
5725A
Instruction Manual
EEROM |
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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
Data Latch |
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The Data Latch (U510) is enabled via LATCHSEL when three conditions are met: address bit A15 is 0, A14 is 1 (hex
Strobe Lines |
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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
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 |
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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 |
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An optoisolator circuit links the
When the 5725A is not being used, all cable inputs into the 5700A are tied to the 5700A guard to shunt noise currents away.