Fluke 5700A Series User Manual

Theory of Operation
Introduction 2
2-3
2-98. Internal CAL Zero Amplifier ....................................................... 2-59
2-99. Switch Matrix 5725A Amplifier Interface ................................... 2-61
2-100. DAC Assembly (A11) ...................................................................... 2-61
2-101. Basic DAC Theory of Operation.................................................. 2-61
2-102. DAC Assembly Digital Control ................................................... 2-64
2-103. DAC Assembly Reference Circuitry............................................ 2-64
2-104. Duty-Cycle Control Circuit.......................................................... 2-65
2-105. DAC Filter Circuit........................................................................ 2-66
2-106. DAC Output Stage ....................................................................... 2-66
2-107. Sense Current Cancellation Circuit.............................................. 2-67
2-108. Linearity Control Circuit.............................................................. 2-67
2-109. Negative Offset Circuit ................................................................ 2-68
2-110. DAC Output Switching................................................................ 2-68
2-111. DAC Buffered Reference Sip....................................................... 2-68
2-112. Calibration Hardware ................................................................... 2-69
2-113. ADC Amplifier............................................................................. 2-69
2-114. ADC Input Selection.................................................................... 2-69
2-115. ADC Circuit ................................................................................. 2-70
2-116. How the DAC is Used in Calibration........................................... 2-72
2-117. DAC Assembly Calibration ......................................................... 2-72
2-118. Oscillator Section Overview............................................................. 2-73
2-119. Oscillator Control Assembly (A12).................................................. 2-73
2-120. Oscillator Control Digital Control ............................................... 2-74
2-121. Oscillator Input Switching ........................................................... 2-74
2-122. Sense Current Cancellation .......................................................... 2-74
2-123. Averaging Converter.................................................................... 2-75
2-124. Error Integrator ............................................................................ 2-75
2-125. Three-Pole Filter .......................................................................... 2-75
2-126. Analog Amplitude Control Loop ................................................. 2-75
2-127. AC/DC Thermal Transfer Circuit ................................................ 2-77
2-128. Oscillator Calibration ................................................................... 2-79
2-129. AC/DC Frequency Response Characterization ............................ 2-80
2-130. Oscillator Output Assembly (A13)................................................... 2-80
2-131. Oscillator Output Digital Control................................................. 2-82
2-132. Quadrature RC Oscillator............................................................. 2-82
2-133. Oscillator Amplitude Control....................................................... 2-83
2-134. Phase−locked Loop ...................................................................... 2-83
2-135. 2.2V and 22V Range Output Amplifier ....................................... 2-84
2-136. Oscillator Wideband Smd Assembly (A13A1)............................ 2-84
2-137. Output Stage................................................................................. 2-85
2-138. Phase Shifter ................................................................................ 2-85
2-139. Power Amplifier Assembly (A16).................................................... 2-85
2-140. Power Amplifier Digital Control Sip Assembly (A16A1)........... 2-86
2-141. PA Common Circuitry ................................................................. 2-87
2-142. +PA and -PA Supplies ................................................................. 2-87
2-143. PA Input Stage ............................................................................. 2-87
2-144. PA Mid Stage ............................................................................... 2-88
2-145. PA Output Stage........................................................................... 2-88
2-146. PA Sense Current Cancellation Circuitry..................................... 2-89
2-147. PA in Standby .............................................................................. 2-89
2-148. PA Operation: 220V DC Range................................................... 2-89
2-149. PA Operation: 220V AC Range................................................... 2-91
2-150. High Voltage Assembly Support Mode ....................................... 2-91
2-153. 220V DC Internal Calibration Network....................................... 2-92
2-154. PA Calibration.............................................................................. 2-92

Fluke 5700A Series Specifications

General

Type	Multifunction Calibrator
Operating Temperature	0°C to 50°C
Storage Temperature	-40°C to 70°C
Humidity	10% to 90% non-condensing
Frequency Range	10 Hz to 1 MHz
Accuracy	Varies by function and range. See manufacturer's specifications for details.
Output Stability	Varies by function and range. See manufacturer's specifications for details.
Power Requirements	50 Hz to 60 Hz