Fluke 96000 Series - Page 39

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Theory of Operation

Overall Functional Description 2

2-9

hpn388.eps

Figure 2-4. RF Output PCA - Simplified Schematic

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Table of Contents3
Introduction and Specifications11
Introduction11
Contact Fluke Calibration12
Safety Information12
Symbols13
General Safety Summary13
Prevent Instrument Damage15
Specifications17
General Specifications (96040A and 96270A)17
Frequency Reference Input/Output Specifications (96040A and 96270A)18
Leveled Sine Specifications at Microwave Output (96270A)21
Leveled Sine Specifications at Leveling Head Output (96040A and 96270A) and Microwave Output (96270A)23
Modulation Specifications at Leveling Head Output (96040A and 96270A) and Microwave Output (96270A)25
Frequency Sweep Specifications at Leveling Head Output (96040A and 96270A) and Microwave Output (96270A)28
Frequency Counter Specifications29
Power Meter Readout Specifications (96270A Only)29
GPIB Command Emulation Mode Specifications29
Theory of Operation31
Introduction31
Overall Functional Description31
User Interface33
Frequency Synthesis34
Amplitude Control34
Frequency Modulation35
Amplitude Modulation35
Instrument Control36
Power Supplies36
Performance Tests43
Introduction43
Recommended Tools and Equipment43
Performance Test46
Reference Frequency Accuracy47
Frequency Accuracy (96040A and 96270A)48
Harmonics and Spurious Signal Content - Levelling Head (96040A and 96270A)51
Phase Noise Test (96040A and 96270A, Optional)54
Modulation Test-Leveling Head (96040A and 96270A, Optional)56
Frequency Counter Accuracy (96040A and 96270A)59
Level Accuracy - 50 Ω Leveling Head (96040A and 96270A)60
Attenuation Accuracy - 50 Ω Leveling Head (Optional 96040A and 96270A)73
Level Accuracy - 75 Ω Levelling Head (96040A and 96270A)78
Attenuation Accuracy - 75 Ω Leveling Head (Optional, 96040A and 96270A)91
VSWR Test - 75 Ω (Optional)93
Microwave Output Level Accuracy (96270A, Optional Functional Test)97
Microwave Output Frequency Accuracy (96270A Only)108
Microwave Output Harmonics and Spurious Signal Content (96270A)112
Modulation Test (96270A, Optional)117
Calibration Adjustment121
Introduction121
Calibration Adjustments121
Rear Panel Calibration Enable Switch123
Reference Frequency Adjustment123
Base Adjustment - Front Panel Head RF Output124
Leveling Head Adjustment - 50 Ω127
Leveling Head Adjustment - 75 Ω130
Microwave Output Adjustment - with Low-Level Output Option Fitted134
Microwave Output Adjustment - Low-Level Output Option Not Fitted136
Microwave Output Flatness Characterization138
Maintenance139
Operator Maintenance139
Clean the Product139
Clean the Air Filter140
Replace the Line-Power Fuses140
Troubleshooting142
Disassembly and Reassembly142
Before You Start143
Removing External Hardware Components143
Handles143
Top and Bottom Covers144
Bottom Feet144
Shields144
Remove the Air Filter144
Removing Major Assemblies146
RF Output PCA146
X 2W Coaxial Relays148
Front Panel Assembly148
Display and Keypad PCA149
Digital PCA150
27 Ghz Control PCA (96270A)151
Synthesizer PCA152
Fans153
Rear Panel Assemblies154
Interconnection PCA155
Low Voltage Transformer156
Power Supply PCA156
Switch Mode Power Supply Module157
Leveling Head Disassembly Procedure158
Leveling Head Reassembly Procedure159
Reassembling the Product159
Safety Test159
Running Self-Test160
Review the Results161
Interpreting the Results163
Firmware Upgrade164
Equipment Required for the Restore or Upgrade164
Firmware Installation165
Lists of Replaceable Parts167
Introduction167
How to Obtain Parts167
Replaceable Parts Lists168
A Performance Test Record171

Fluke 96000 Series - Page 39

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