Need help?Do you have a question about the HP 8672a and is the answer not in the manual?
General| Brand | HP |
|---|---|
| Model | 8672a |
| Category | Portable Generator |
| Language | English |
Explains safety symbols, warnings, and cautions for safe operation.
Covers required equipment, selected components, and adjustment sequence.
Procedure for adjusting and verifying power supply voltages.
Procedures for YTO pretune, driver, sampler, loop offset, and phase detector adjustments.
Procedures for FM driver, FM amplifier, and FM overmodulation adjustments.
Covers YTM, SRD bias, power clamp, ALC, flatness, AM bandwidth/meter.
Explains ordering, abbreviations, and parts list structure.
Details on ordering, updating lists, and identifying parts.
Lists recommended spare parts for maintenance and repair.
Information on adapting the manual for older instruments and modifications.
Overview of troubleshooting, failure modes, and service approaches.
Essential safety warnings, cautions, and post-service checks.
Guides for removing and replacing components and assemblies.
Instructions for cleaning, fan, and vent maintenance.
Explains logic symbols, gates, blocks, and device symbology.
List of related sections and chapters for context and further information.
Explanation of how the major assemblies function within the instrument.
Step-by-step guidance for diagnosing and resolving instrument issues.
Links to related service sheets and chapters for comprehensive understanding.
Details the function and operation of the Time Base Reference circuit.
Guides for diagnosing issues within the Time Base Reference assembly.
Pointers to related documentation for context and detailed information.
Explains the function of RF phase locked loops and dividers.
Steps for diagnosing and resolving RF phase locked loops.
Links to related sections for a complete understanding of the YTO summing loop.
Explains the operation of the YTO summing phase locked loop and its components.
Procedures for diagnosing and resolving YTO summing phase locked loop problems.
Links to related sections for context on the microwave signal path.
Explains the function of the microwave signal path and its assemblies.
Procedures for diagnosing issues within the microwave signal path.
Links to related sections for a comprehensive understanding of ALC operation.
Details the functionality of the ALC circuitry for output level control.
Steps for diagnosing and resolving ALC circuit malfunctions.
Pointers to related sections for context on DCU interface operation.
Explains the DCU interface functions for remote and local control.
Guides for diagnosing and resolving DCU interface problems.
Links to related sections for understanding the DCU HP-IB interface.
Details the HP-IB interface operation for remote control and data transfer.
Procedures for diagnosing and resolving DCU HP-IB interface issues.
Pointers to related sections for context on DCU frequency control.
Explains how the DCU controls frequency and its registers.
Guides for diagnosing and resolving DCU frequency control problems.
Links to related sections for understanding the instrument's power supplies.
Details the operation of the rectifier, positive, and negative regulator assemblies.
Procedures for diagnosing and resolving power supply issues.
Pointers to related sections for context on the reference phase detector.
Explains the function of the reference oscillator and phase detector.
Guides for diagnosing and resolving reference phase detector issues.
Links to related sections for understanding the 100 MHz VCXO assembly.
Details the operation of the 100 MHz VCXO, buffer, and quadrupler.
Procedures for diagnosing and resolving 100 MHz VCXO assembly problems.
Pointers to related sections for context on the M/N phase detector.
Explains the M/N phase locked loop, dividers, and their operation.
Guides for diagnosing and resolving M/N phase detector assembly issues.
Links to related sections for understanding the M/N VCO assembly.
Explains the operation of the M/N VCO assembly and its frequency determination.
Procedures for diagnosing and resolving M/N VCO assembly problems.
Pointers to related sections for context on the M/N output assembly.
Explains the function of the M/N output assembly and frequency determination.
Guides for diagnosing and resolving M/N output assembly issues.
Links to related sections for understanding the 20/30 MHz divider.
Explains the operation of the 20/30 MHz programmable divider.
Procedures for diagnosing and resolving 20/30 MHz divider problems.
Pointers to related sections for context on the phase detector.
Explains the function of the phase detector and its output signals.
Guides for diagnosing and resolving phase detector assembly issues.
Links to related sections for understanding the VCO assembly.
Details the operation of the VCO assembly and its frequency tuning.
Procedures for diagnosing and resolving VCO assembly problems.
Pointers to related sections for context on the DAC assembly.
Explains the DAC assembly, BCD conversion, voltage reference, and summing amplifier.
Guides for diagnosing and resolving DAC assembly issues.
Links to related sections for understanding the YTO driver assembly.
Details the operation of the YTO driver, coil driver, and input amplifier.
Procedures for diagnosing and resolving YTO driver assembly problems.
Pointers to related sections for context on the YTO sampler assembly.
Explains the YTO phase detector and sampler operation.
Guides for diagnosing and resolving YTO sampler assembly issues.
Links to related sections for understanding the YTO phase detector.
Explains the operation of the YTO phase detector, FM circuits, and modulation.
Procedures for diagnosing and resolving YTO phase detector issues.
Pointers to related sections for context on the YTO/FM coil driver.
Explains the YTO/FM coil driver, FM signal path, and integrated FM signal.
Guides for diagnosing and resolving YTO/FM coil driver issues.
Links to related sections for understanding the RF amplifier and ALC.
Explains the function of the RF amplifier and ALC assembly.
Procedures for diagnosing and resolving RF amplifier and ALC issues.
Pointers to related sections for context on YTM control.
Explains the operation of the YTM (Yig-Tuned Multiplier).
Guides for diagnosing and resolving YTM control problems.
Links to related sections for understanding SRD control circuits.
Details the function of SRD control circuits and bias assembly.
Procedures for diagnosing and resolving SRD control circuit issues.
Pointers to related sections for context on the ALC detector.
Explains the RF path and ALC detector assembly functions.
Guides for diagnosing and resolving ALC detector assembly issues.
Links to related sections for understanding the RF output level control.
Details the function of the programmable attenuator and level control.
Procedures for diagnosing and resolving RF output level control issues.
Pointers to related sections for context on the digital processor.
Explains the operation of the digital processor and its interface.
Guides for diagnosing and resolving digital processor issues.
Links to related sections for understanding front panel controls and displays.
Explains the RF front panel controls, displays, and assemblies.
Procedures for diagnosing and resolving front panel control and display issues.
Pointers to related sections for context on the metering assembly.
Explains the metering assembly functions and signal path.
Guides for diagnosing and resolving metering assembly issues.
Links to related sections for understanding the HP-IB address assembly.
Details the HP-IB address assembly operation and handshake protocols.
Procedures for diagnosing and resolving HP-IB address assembly issues.
Pointers to related sections for context on the HP-IB address assembly.
Explains the HP-IB interface operation for data conversion and bus communication.
Guides for diagnosing and resolving HP-IB address assembly issues.
Links to related sections for understanding the HP-IB interface assembly.
Details the HP-IB interface operation for data translation and program string syntax.
Procedures for diagnosing and resolving HP-IB interface assembly issues.
Pointers to related sections for context on the HP-IB interface assembly.
Explains the HP-IB interface operation for data transfer and phase lock control.
Guides for diagnosing and resolving HP-IB interface assembly issues.
Links to related sections for understanding Register 1 assembly.
Details the operation of Register 1, BCD, and frequency data storage.
Procedures for diagnosing and resolving Register 1 assembly issues.
Pointers to related sections for context on timing and control.
Explains timing and control signals, data cycles, and register functions.
Guides for diagnosing and resolving timing and control assembly issues.
Links to related sections for understanding timing and control.
Details the operation of the timing and control assembly, including adders.
Procedures for diagnosing and resolving timing and control assembly problems.
Pointers to related sections for context on the output register.
Explains the output register, data, and M/N decoder functions.
Guides for diagnosing and resolving output register assembly issues.
Links to related sections for understanding the output register.
Details the operation of the output register, DAC, and M/N decoder.
Troubleshooting is covered in service sheet 29.
Pointers to related sections for context on the DCU front panel.
Explains the DCU front panel controls, indicators, and assemblies.
Guides for diagnosing and resolving DCU front panel assembly issues.
Links to related sections for understanding the DCU front panel.
Details the operation of the DCU front panel, including RPG and display.
Procedures for diagnosing and resolving DCU front panel assembly issues.
Pointers to related sections for context on the rectifier assembly.
Explains the operation of the rectifier assembly, regulators, and protection circuits.
Guides for diagnosing and resolving rectifier assembly issues.
Links to related sections for understanding the positive regulator.
Details the operation of the +20V, +5.2V, and +40V regulators.
Procedures for diagnosing and resolving positive regulator issues.
Pointers to related sections for context on the negative regulator.
Explains the operation of the -10V, -5.2V, and -40V regulators.
Guides for diagnosing and resolving negative regulator issues.
To Next Page
