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Contents
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2-169. Ohms Main Assembly (A10) ........................................................... 2-109
2-170. Selection of Resistance Values.................................................... 2-109
2-171. Ohms Main Assembly Support of Current Function Calibration 2-112
2-172. Ohms Digital Control .................................................................. 2-112
2-173. Ohms Cal Assembly (A9)................................................................ 2-112
2-174. Ohms CAL Digital Control ......................................................... 2-112
2-175. 1, 1.9, and Short Resistance......................................................... 2-113
2-176. Two-Wire Ohmmeter Compensation Circuit. ............................. 2-113
2-180. Ohms Calibration......................................................................... 2-115
2-186. Current/High Resolution Oscillator Assembly Overview (A7)....... 2-121
2-187. Current Section............................................................................ 2-122
2-199. High-Resolution Oscillator Section............................................. 2-128
2-204. Rear Panel Assembly (A21)............................................................. 2-130
2-205. Rear Panel Power Supplies.......................................................... 2-131
2-206. Rear Panel Address Mapping ...................................................... 2-131
2-207. Clock Regeneration Circuit ......................................................... 2-132
2-208. IEEE-488 (GPIB) Interface.......................................................... 2-132
2-209. RS-232C Interface ....................................................................... 2-132
2-210. Auxiliary Amplifier Interface...................................................... 2-133
2-211. 5725A Interface ........................................................................... 2-133
2-212. Phase Lock In/Variable Phase out............................................... 2-133
2-213. Rear Panel Relay Control ............................................................ 2-134
2-214. Rear Panel CPU Interface............................................................ 2-134
2-215. Wideband AC Module (Option -03)................................................ 2-135
2-216. Wideband Oscillator Assembly (A6) .......................................... 2-135
2-222. Wideband Output Assembly (A5) ............................................... 2-138
3 Calibration and Verification .............................................................. 3-1
3-1. Introduction .......................................................................................... 3-3
3-2. Accessing the Fuse............................................................................... 3-4
3-3. Cleaning the Air Filter.......................................................................... 3-5
3-4. Cleaning the Exterior ........................................................................... 3-6
3-5. Calibration............................................................................................ 3-6
3-6. Calibrating the 5700A/5720A Series II to External Standards ............ 3-6
3-7. Calibration Requirements ................................................................ 3-7
3-8. When to Adjust the Calibrator’s Uncertainty Specifications .......... 3-7
3-9. Calibration Procedure ...................................................................... 3-8
3-10. Range Calibration................................................................................. 3-14
3-11. Calibrating the Wideband AC Module (Option 5700A-03)................. 3-17
3-12. Performing a Calibration Check........................................................... 3-20
3-13. Full Verification................................................................................... 3-22
3-14. Required Equipment for All Tests................................................... 3-23
3-15. Warm-up Procedure for All Verification Tests ............................... 3-23
3-16. Resistance Verification Test............................................................ 3-25
3-17. Two-Wire Compensation Verification ............................................ 3-27
3-18. DC Voltage Verification Test.......................................................... 3-28
3-19. DC Voltage One-Tenth Scale Linearity Test................................... 3-29
3-20. Direct Current Accuracy Verification Test...................................... 3-30
3-21. AC Voltage Frequency Accuracy Test ............................................ 3-31
3-22. Output Level Tests For AC V Ranges ............................................. 3-31
3-23. AC Current Test, 22 mA to 11A Ranges ......................................... 3-33
3-24. AC Current Test, 2 mA and 200 µA Ranges ................................... 3-36
3-25. Rationale for Using Metal-Film Resistors to Measure AC Current 3-37
3-26. Wideband Frequency Accuracy Test............................................... 3-38