118
Chapter 5
Troubleshooting the Synthesizer Section
A11 Reference Assembly Description
A11 Reference Assembly Description
Purpose. The A11 reference assembly provides a phase locked 10 MHz
signal to other boards and assemblies in the instrument. The 10 MHz
reference is phase locked either to an internal reference source or to an
externally applied signal. Any external signal between 1 MHz and
30 MHz can be selected by the user to phase lock the 10 MHz reference
signal.
Signal Path
. The 10 MHz signal is routed to the A12 synthesizer
assembly, the A8 analog IF assembly, the A26 CPU assembly, the A13
front end driver board, the option slots on the A25 motherboard, and
the rear panel 10 MHz output connector. In addition, a 50 MHz signal
and a 300 MHz signal are routed to the A10 3rd converter assembly.
The 50 MHz signal is used for calibration purposes, and is switched on
when amplitude calibration is performed. The 300 MHz signal is used
as a second LO for the 3rd Converter assembly, and is always active.
The reference assembly utilizes a phase-lock loop which provides
stabilization for all the internal reference oscillators used throughout
the instrument.
The reference assembly performs the following function:
• phase locks the 100 MHz VCXO to, either, an internal 10 MHz
frequency reference, or to an external standard, user selectable
between 1 MHz and 30 MHz.
• provides a phase-locked 300 MHz (100 MHz
×
3) 3rd LO signal to the
A10 3rd Converter assembly.
• provides a phase-locked 600 MHz (100 MHz
×
6) signal to the A9 2nd
LO assembly.
• provides a 600 MHz (100 MHz
×
6) signal to the A12 Synthesizer
assembly.
• provides the reference unlock detector which, through the A26 CPU
assembly, warns the user that the reference lock loop is unlocked.
• provides a phase-locked 50 MHz (100 MHz
÷
2) internal calibrator
signal to the A10 3rd Converter assembly.
• provides the 10 MHz phase-locked reference for various assemblies
in the instrument.
Содержание E4440A
Страница 12: ...12 Contents...
Страница 13: ...13 1 Overview...
Страница 42: ...42 Chapter1 Overview Contacting Agilent Technologies...
Страница 43: ...43 2 Overall Troubleshooting...
Страница 69: ...69 3 Troubleshooting the RF Section E4440A E4443A E4445A...
Страница 88: ...88 Chapter3 Troubleshooting the RF Section E4440A E4443A E4445A RF Section Description E4440A E4443A E4445A...
Страница 89: ...89 4 Troubleshooting the RF Section E4446A E4447A E4448A...
Страница 110: ...110 Chapter4 Troubleshooting the RF Section E4446A E4447A E4448A RF Section Description E4446A E4447A E4448A...
Страница 111: ...111 5 Troubleshooting the Synthesizer Section...
Страница 125: ...125 6 Troubleshooting the IF Section...
Страница 144: ...144 Chapter6 Troubleshooting the IF Section Verifying the A7 Digital IF Board...
Страница 145: ...145 7 Troubleshooting the Processor Power Supply and Display...
Страница 165: ...165 8 Hardware Options...
Страница 171: ...Chapter 8 171 Hardware Options Verifying Option 110 Figure 8 2 Preamplifier Pin Out and Expected Voltage Levels...
Страница 184: ...184 Chapter8 Hardware Options Verifying Option 122 or 140 Wide Bandwidth Digitizer...
Страница 186: ...186 Chapter8 Hardware Options Verifying Option 122 or 140 Wide Bandwidth Digitizer...
Страница 194: ...194 Chapter8 Hardware Options Overview and Verification of Option 123 Microwave and Millimeter Preselector Bypass...
Страница 196: ...196 Chapter8 Hardware Options Overview and Verification of Option 123 Microwave and Millimeter Preselector Bypass...
Страница 202: ...202 Chapter8 Hardware Options Overview and Verification of Option 123 Microwave and Millimeter Preselector Bypass...
Страница 206: ...206 Chapter8 Hardware Options Verifying Option 124 Y Axis Video Out...
Страница 207: ...207 9 Block Diagrams...
Страница 211: ...Chapter 9 211 Block Diagrams Signal Mnemonics Figure 9 1 Graphic Symbols...
Страница 212: ...212 Chapter9 Block Diagrams Overall Block Diagrams Overall Block Diagrams...
Страница 214: ...214 Chapter9 Block Diagrams Overall Block Diagrams...
Страница 216: ...216 Chapter9 Block Diagrams Overall Block Diagrams...
Страница 217: ...Agi l ent MOTHERBOARD E4440 60001 se860a...
Страница 218: ...218 Chapter9 Block Diagrams Overall Block Diagrams...
Страница 220: ...220 Chapter9 Block Diagrams Overall Block Diagrams...
Страница 221: ...221 10 Replaceable Parts Lists and Locations...
Страница 252: ...252 Chapter10 Replaceable Parts Lists and Locations Hardware Figure 10 4 Major Assemblies...
Страница 254: ...254 Chapter10 Replaceable Parts Lists and Locations Hardware Figure 10 5 RF Section E4440A E4443A E4445A Standard...
Страница 256: ...256 Chapter10 Replaceable Parts Lists and Locations Hardware Figure 10 6 YTO Assembly...
Страница 258: ...258 Chapter10 Replaceable Parts Lists and Locations Hardware Figure 10 7 RF Input Connector E4440A E4443A E4445A...
Страница 260: ...260 Chapter10 Replaceable Parts Lists and Locations Hardware Figure 10 8 RF Section Cables E4440A E4443A E4445A Standard...
Страница 267: ...Chapter 10 267 Replaceable Parts Lists and Locations Hardware...
Страница 268: ...268 Chapter10 Replaceable Parts Lists and Locations Hardware Figure 10 14 RF Section E4446A E4447A E4448A Standard...
Страница 284: ...284 Chapter10 Replaceable Parts Lists and Locations Hardware Figure 10 22 Option Driver Board and Cables...
Страница 292: ...292 Chapter10 Replaceable Parts Lists and Locations Hardware Figure 10 27 Front Panel Parts...
Страница 298: ...298 Chapter10 Replaceable Parts Lists and Locations Hardware Figure 10 32 Rear Frame Hardware...
Страница 300: ...300 Chapter10 Replaceable Parts Lists and Locations Hardware Figure 10 33 Mid Web Parts Figure 10 34 Fan Guard...
Страница 304: ...304 Chapter10 Replaceable Parts Lists and Locations Hardware...
Страница 305: ...305 11 Assembly Replacement Procedures...
Страница 321: ...Chapter 11 321 Assembly Replacement Procedures RF Section E4440A E4443A E4445A Figure 11 9 RF Section Cables Standard...
Страница 337: ...Chapter 11 337 Assembly Replacement Procedures RF Section E4446A E4447A E4448A Figure 11 21 RF Section Removal...
Страница 340: ...340 Chapter11 Assembly Replacement Procedures RF Section E4446A E4447A E4448A Figure 11 24 RF Section Cables Standard...
Страница 379: ...Chapter 11 379 Assembly Replacement Procedures A23 Disk Drive Figure 11 45 Disk Drive and Motherboard Removal...
Страница 380: ...380 Chapter11 Assembly Replacement Procedures A23 Disk Drive Figure 11 46 Disk Drive Board Removal...
Страница 383: ...Chapter 11 383 Assembly Replacement Procedures A25 Motherboard Figure 11 47 Bottom Screws...
Страница 405: ...Chapter 11 405 Assembly Replacement Procedures Front Frame Subassemblies Figure 11 63 Keypad Parts...
Страница 409: ...409 12 Post Repair Procedures...
Страница 429: ...429 13 Firmware Upgrades...
Страница 432: ...432 Chapter13 Firmware Upgrades Firmware Upgrades Including Measurement Personality Upgrades...