To Next PageTo Next PageHow to troubleshoot blank displays on HP Measuring Instruments?
If your HP Measuring Instruments display is blank, it could stem from problems in the controller or display/power-supply sections. To diagnose, use a BASIC program to read error codes over HP-IB. A return code of 0 indicates no errors.
What to do if HP 8560E show blank displays?
If you're experiencing blank displays on your HP Measuring Instruments, troubleshoot the A2 controller assembly. Refer to Chapter 9 for guidance.
What oscilloscope settings to use for HP 8560E Measuring Instruments with blank displays?
To troubleshoot blank displays on HP Measuring Instruments, set the oscilloscope to the following settings: Sweep time 1ms/div; Amplitude scale 2V/div.
General| Frequency Resolution | 1 Hz |
|---|---|
| Amplitude Range | +30 dBm to -135 dBm |
| Third Order Intercept (TOI) | +15 dBm |
| Second Harmonic Distortion | -70 dBc |
| Video Bandwidth (VBW) | 1 Hz to 3 MHz |
| Input Impedance | 50 Ohm |
| Maximum Input Level | +30 dBm |
| Dimensions | 177 mm H x 426 mm W x 497 mm D |
| Power Requirements | 100 to 240 VAC, 50 to 60 Hz |
| Display | CRT |
| Input VSWR | 1.5:1 (typical) |
Provides an overview of the HP 8560E/EC Spectrum Analyzer Service Guide.
Explains how to navigate and utilize the information within the service guide.
Details key differences in features and hardware between the EC and E series models.
Lists available options for the HP 8560E/EC and their unique assemblies.
Explains the serial number format and its importance for service.
Describes the functions and usage of the TAM for diagnostics and adjustments.
Lists the service tools required for instrument repair.
Lists essential test equipment for operation verification and adjustments.
Details the importance of ESD protection for electronic components.
Provides instructions for safely packaging and returning instruments for service.
Lists global sales and service office locations for support.
Overview of manual and automated adjustment procedures for the HP 8560E/EC.
Highlights important safety information for performing adjustments.
Guides on selecting necessary adjustments after repair or test failure.
Lists test equipment required for manual adjustment procedures.
Lists components that are adjustable or factory-selected.
Specifies necessary tools for performing adjustments.
Details the correct orientation for servicing the instrument.
Instructions on operating the Test and Adjustment Module (TAM).
Procedure to adjust the high voltage power supply for CRT display.
Procedure for adjusting CRT display parameters like focus and intensity.
Procedure to adjust the center frequency of IF bandpass filter poles.
Adjustments for calibrator amplitude and reference attenuator.
Procedures for Limiter Phase, Linear Fidelity, and Log Fidelity adjustments.
Procedure to adjust the sampling oscillator tank circuit for proper tuning voltage.
Procedures for adjusting YTO main coil and FM coil.
Procedure to adjust gate bias and SENSE voltages for the LO distribution amplifier.
Adjustments for setting the output power of the tracking generator.
Procedure to adjust DAC for flatness compensation amplifiers.
Procedure to adjust the CAL OUTPUT amplitude to -10.00 dBm.
Procedure to adjust the TCXO for minimum frequency error.
Procedure to adjust FM DEMOD for peak response.
Procedure to adjust external mixer bias to 0 Vdc.
Procedure to determine and adjust flatness compensation amplifier slope.
Procedure to adjust the 298 MHz SIG ID oscillator frequency.
Procedure to adjust the internal 10 MHz reference for minimum frequency error.
Procedure to recenter the tracking oscillator range.
Procedure to adjust the 16MHz CPU clock for phase lock.
Procedure to adjust 100 MHz VCXO and tripler for maximum signal level.
Describes removal and replacement of major assemblies.
Details how to access major assemblies by removing covers and folding boards.
Explains the color coding system for identifying coaxial cables and wires.
Step-by-step instructions for removing and replacing the spectrum analyzer cover.
Instructions for removing and replacing the front frame and LCD assembly.
Instructions for removing and replacing the front frame and CRT assembly.
Instructions for removing and replacing the keyboard and front panel keys.
Instructions for removing and replacing the RPG (rotary pulse generator).
Instructions for removing and replacing multiple circuit board assemblies.
Instructions for removing and replacing the power supply assembly.
Instructions for removing and replacing the power supply assembly.
Instructions for removing and replacing the high voltage module.
Details removal and replacement for several assemblies (A7-A13).
Instructions for removing and replacing the frequency control and RF assemblies.
Instructions for replacing the fast ADC and CRT driver assemblies.
Instructions for removing and replacing the fan assembly.
Instructions for replacing the internal battery.
Instructions for removing and replacing the rear frame and dress panel.
Instructions for removing and replacing the line switch cable.
Procedure for replacing the EEROM chip.
Instructions for removing and replacing the OCXO.
Provides information on ordering all replaceable parts and assemblies.
Details on how to order parts or assemblies from HP Sales and Service.
Explains the format and information provided for each part in the list.
Information on part numbers that depend on the instrument's firmware.
Lists reference designations used for components.
Provides a list of abbreviations used in the document.
Lists reference designations, abbreviations, and multipliers.
Comprehensive list of all replaceable parts with HP part numbers.
Identifies instrument cables and assemblies with references to figures.
List of instrument assemblies and their corresponding figure numbers.
List of instrument cables and their corresponding figure numbers.
Overview of troubleshooting methodology and functional sections.
Guides on troubleshooting specific functional sections of the instrument.
Instructions for using the Test and Adjustment Module (TAM) for diagnostics.
Lists and explains error messages displayed by the spectrum analyzer.
Details programming errors and their potential causes and solutions.
Troubleshooting steps for errors related to the ADC/interface section.
Troubleshooting for issues related to LO and RF hardware/firmware.
Troubleshooting for digital and checksum errors, including EEROM issues.
Troubleshooting steps for microprocessor operational errors.
Troubleshooting steps for battery backup issues affecting state storage.
Guidance for handling errors related to the instrument's model number.
Troubleshooting for general system errors involving controller and interface assemblies.
Troubleshooting steps for errors related to the fast ADC on EC-series instruments.
Error codes reserved for option modules like TAM and mass memory.
Troubleshooting guidance for user-generated error codes.
Description of the six main functional sections of the spectrum analyzer.
Overview of the ADC/Interface section including keyboard, RPG, and interface assemblies.
Guidance on using the TAM for troubleshooting ADC/Interface circuits.
Troubleshooting steps for issues with keyboard or RPG response.
Troubleshooting steps for issues related to triggering or video gating.
Procedure to adjust the R/T DAC for preselector peaking.
Procedure to control RF Gain DACs for flatness compensation.
Troubleshooting procedures for the video circuits within the A3 assembly.
Information on the VGA providing adjustable gain in the video path.
Details on the track and hold circuit for sampling noise.
Troubleshooting procedures for the ADC circuits within the A3 assembly.
Checks for required control signals for ADC operation.
Procedure to determine the start time of ADC conversions.
Description of the ADC ASM's function in controlling ADC operations.
Details the successive approximation state machine (SASM) of the ADC.
Information on the ramp counter used for sweeps greater than 2.0 MHz.
Troubleshooting steps for digital control problems affecting the display.
Troubleshooting analog bus drivers for proper signal transfer.
Details on analog bus timing generation and strobes.
Information on interface strobe select and demultiplexer truth tables.
Description of fast ADC circuitry, amplifiers, and control.
Details video input scaling and limiting functions.
Description of the 8-bit flash ADC and its operation.
Information on the static RAM used for storing ADC samples.
Description of the reference clock circuitry and frequency generation.
Details the clock and sample rate generator functions.
Information on the spectrum analyzer's trigger modes.
Description of the 16-bit post-trigger counter.
Description of the 15-bit circular address counter.
Description of the video trigger comparator.
Overview of the IF Section, including Log Amplifier and IF assemblies.
Guidance on using the TAM for IF section troubleshooting.
Steps to troubleshoot the log amplifier using the TAM.
Steps to troubleshoot the A5 IF assembly using the TAM.
Steps to troubleshoot the cal oscillator using the TAM.
Procedure for the automatic adjustment of the IF Section.
Lists IF parameters adjusted during the automatic IF sequence.
Lists basic functions required for the Automatic IF Adjustment routine.
Information for investigating failures in IF-section-related performance tests.
Procedure to test IF gain uncertainty.
Procedure to test the scale fidelity of the IF section.
Troubleshooting resolution bandwidth problems in the IF section.
Description and troubleshooting for the log amplifier assembly.
Details on the linear amplifiers and their gain stages.
Procedure for adjusting the programmable video offset.
Procedure to check the video output for proper response.
Description of the frequency counter prescaler/conditioner.
Troubleshooting for AM/FM demodulation and audio circuits.
Troubleshooting for problems with the 4.8 kHz IF filters.
Troubleshooting for problems with the 10.7 MHz IF filters.
Troubleshooting for combined 4.8 kHz and 10.7 MHz IF filters.
Description and troubleshooting for the VCXO circuit.
Description of the input switch for log and linear modes.
Description of the LO switch function.
Description of the synchronous detector circuit.
Description of the limiter stages and the log narrow filter.
Function of the isolation amplifier in preventing loop oscillations.
Description of the detector/mixer circuits.
Procedures for compensating log offset and gain.
Troubleshooting the video MUX circuit.
Description of the A5 IF assembly components and functions.
Procedure to check the IF signature for proper operation.
Diagnosing common problems with IF signatures.
Troubleshooting issues with 1 MHz resolution bandwidth.
Troubleshooting issues with 30 kHz resolution bandwidth.
Troubleshooting issues with 3 kHz and 10 kHz resolution bandwidths.
Procedure to check and adjust step gains.
Description and troubleshooting for the cal oscillator assembly.
Procedure for troubleshooting cal oscillator unlock conditions.
Troubleshooting steps for inadequate CAL OSC AMPTD range.
Troubleshooting resolution bandwidth issues for low frequency ranges.
Overview of the controller section including assemblies and display.
Guidance on using the TAM for controller troubleshooting.
Procedure to troubleshoot a blank display using an HP-IB printer.
Procedure to test microprocessor operation using DSA.
Troubleshooting steps for various display issues.
Troubleshooting steps for the line generators.
Troubleshooting the blanking circuit.
Troubleshooting steps for distorted or misaligned display traces.
Troubleshooting steps for intensity level issues.
Troubleshooting steps for incorrect characters or graticule display.
Troubleshooting for dimmer long lines compared to short lines.
Troubleshooting steps for analog zero-span display issues.
Troubleshooting steps for frequency-count marker issues.
Description of the frequency counter circuit and its operation.
Overview of the synthesizer section assemblies and block diagrams.
General troubleshooting procedures for the synthesizer section.
Guidance on setting up test equipment for synthesizer troubleshooting.
Instructions for using the TAM for synthesizer troubleshooting.
General troubleshooting steps for phase-locked loops (PLLs).
Troubleshooting steps for PLLs locked at incorrect frequencies.
Troubleshooting steps for unlocked PLL conditions.
Troubleshooting for unlocked reference PLLs with 100 MHz VCXO.
Procedure to check the amplifier input level.
Troubleshooting for unlocked reference PLLs with 600 MHz SAWR.
Troubleshooting for unlocked offset lock loop conditions.
Troubleshooting steps for unlocked YTO PLL conditions.
Troubleshooting steps for unlocked fractional N PLL conditions.
Troubleshooting issues related to frequency span accuracy.
Troubleshooting issues related to phase noise.
Overview of the RF section and its assemblies.
Guidance on using the TAM for RF section troubleshooting.
Troubleshooting steps for low band signal issues.
Troubleshooting steps for the LO distribution amplifier.
Troubleshooting steps for the low band mixer.
Troubleshooting steps for the input attenuator.
Troubleshooting steps for the second converter.
Troubleshooting steps for the frequency control assembly.
Troubleshooting steps for the LO distribution amplifier drive.
Troubleshooting steps for the RF assembly.
Procedure to confirm a faulty third converter.
Procedure to confirm the third converter output.
Description and troubleshooting for the third converter.
Procedure to test amplifier gain for flatness compensation.
Troubleshooting the control latches and PIN switch drivers.
Troubleshooting the SIG ID oscillator.
Troubleshooting the 10 MHz reference and its circuitry.
Overview of the Display/Power Supply section.
Description of the LCD display assembly.
Description of the CRT display section.
Description of the power supply and high voltage module.
Details the LCD display assembly components.
Steps to troubleshoot LCD display issues.
Troubleshooting steps for a blank display.
Troubleshooting steps for a dim display.
Procedure to troubleshoot using the VGA port.
Method for troubleshooting by substituting components.
Troubleshooting procedures for the CRT display.
Procedure to troubleshoot blank display using TAM and printer.
Troubleshooting steps for a blank display.
Troubleshooting the blanking signal.
Troubleshooting steps for display distortion issues.
Troubleshooting steps for focus issues on the display.
Troubleshooting steps for intensity level issues.
Detailed information on the power supply and its troubleshooting.
Information on ordering repairable assemblies via CLIPs.
Details on how to order parts and assemblies.
Explanation of the format for parts lists.
Information on part numbers dependent on firmware revisions.
Lists reference designations for components.
Provides a list of abbreviations used in the document.
Lists reference designations, abbreviations, and multipliers.
Comprehensive list of all replaceable parts and their HP part numbers.
