Keysight (Agilent HP) E4407B Repair Service
Product model
E4407B ESA-E Spectrum Analyzer, 100 Hz to 26.5 GHzServices
Send us your Agilent HP E4407B Spectrum Analyzer for full repair and calibration. Our veteran-owned lab offers free estimates and quick turnaround.
Description
•1.1 dB overall amplitude accuracyrn•100 Hz to 5 MHz RBW, 100 Hz to 300 Hz optionalrn•+7.5 dBm TOIrn•5 minute warm-up to guaranteed measurement accuracy
Repair prices
Any failures or unforeseen issues identified during the calibration phase will be detailed in an estimate submitted for your approval prior to any further action. Repair charges are determined by the actual time and materials required. Please be aware that customers are responsible for all associated shipping costs, to and from our location. This initial estimate is provided free of charge.
E4407B Specifications – click to expand
E4407B Specifications
Frequency Span Resolution 2 Hz x N^4.
| Specification | Value |
|---|---|
| Frequency Range | 9 kHz to 26.5 GHz |
| Frequency Span Range | 0 Hz (zero span), 100 Hz to the range of the spectrum analyzer |
| Frequency Sweep Time | 1 ms to 4000 s, Span = 0 Hz 10 µs to 4000 s |
| Resolution Bandwidth (RBW) | 1 kHz to 5 MHz (–3 dB) in 1-3-10 sequence, 9 kHz and 120 kHz (-6 dB) EMI bandwidths |
| Amplitude Measurement Range | Displayed average noise level to maximum safe input level |
E4407B Options – click to expand
E4407B Options
1AX RS-232 and Parallel printer interface (includes RS-232 cable and BenchLink XL software) 1D5 High stability time base. 1D6 Time-gated spectrum analysis. 1D7 50 O/75 Omatching pad with dc block. 1DN 3 GHz tracking generator. 1DR Narrow resolution bandwidths. 1DS 3.0 GHz Preamplifier. A4J IF, sweep and video ports. AYX Fast zero-span sweeps. B72 Increases useable memory to 10 MB. BAA FM Demodulation/Deviation.
Agilent / HP E4407B Error Codes – click to expand
Agilent E4407B Error Codes and Messages
This E4407B error list covers the hardware, alignment and file messages from the ESA/PSA message manual, with notes on which E4407B assemblies to look at.
E4407B notes
- The E4407B is an ESA-E analyzer to 26.5 GHz. This list uses the ESA numbering (108 is Cal Oscillator Unlock, 600-series file errors use ESA numbers).
- Align Now, All on the E4407B needs the AMPTD REF OUT cabled to the INPUT (error 652 if it is missing).
- Above 3 GHz the E4407B uses an A8A6 RYTHM (YIG-tuned harmonic mixer) with the A8A4 LOIS and A7A4 Frequency Extension board; preselector messages 208/209 apply there.
- The E4407B accepts the E-series options such as Option 1D5 precision frequency reference, AYX fast ADC and BAA FM demod.
E4407B hardware and alignment errors
| Error | Message | Meaning |
|---|---|---|
| 64 | Align All Now Needed | The stored alignment data is no longer valid. Run System, Alignments, Align Now, All. If the message comes straight back, or the alignment itself fails, there is a hardware fault in the signal path being aligned. |
| 102 | Excessive 50 MHz RF input power is preventing internal alignments | Too much 50 MHz energy is at the RF input for the internal alignment to run. Bring the input below 0 dBm and align again. |
| 103 | Sampling Oscillator Unlock | The sampling oscillator that helps lock the first LO has lost lock. This is a hardware fault: on the E4407B the LO circuits are part of the A8 RF assembly (A8A1A2 RF Front End/LO bottom board with the YIG oscillator, and A8A1A1 Reference/Third Converter top board). |
| 104 | 1st LO Unlock | The first LO cannot hold phase lock. Usually hardware: on the E4407B the first LO is the YIG oscillator on the A8A1A2 RF Front End/LO board, locked to the A8A1A1 reference. |
| 105 | 2nd LO Unlock | The second LO has lost phase lock. On the E4407B check the A8A2 Second Converter and its 600 MHz drive (cable W10). |
| 106 | 4th LO Unlock | The fourth LO in the IF chain has lost phase lock. On the E4407B suspect the A3 IF assembly. |
| 107 | Sample Clock Unlock | The ADC sample clock has lost lock. On the E4407B suspect the A3 IF assembly or its reference input. |
| 108 | Cal Oscillator Unlock | The internal calibration oscillator has lost lock, so alignments and amplitude accuracy are affected. On the E4407B the calibrator is part of the A8 RF assembly (A8A1A2 RF Front End/LO bottom board with the YIG oscillator, and A8A1A1 Reference/Third Converter top board). |
| 143 | Final IF Overload | The final IF stage is overdriven. Add input attenuation or lower the signal. If it shows with no signal connected, suspect the IF section. |
| 197 | Marker Freq Count HW Failure | The marker counter hardware did not return a valid count. A persistent failure points to the IF/counter circuitry. |
| 206 | Unable to initialize flatness data | Flatness correction data in the internal EEROM could not be set up. Amplitude flatness will be wrong until the data is restored; this needs service. |
| 207 | Unable to store flatness data | Writing flatness correction data to the internal EEROM failed. Usually means a memory problem or a failed adjustment; needs service. |
| 622 | External reference missing or out of range | External reference is selected but the signal at EXT REF IN is missing, too low, or not at the frequency entered. If it appears on internal reference, suspect the reference circuitry. |
| 651 | Connect RF OUT to INPUT | A tracking generator alignment was started without the TG RF OUT cabled to the analyzer INPUT. Connect it and repeat. |
| 652 | Connect Amptd Ref Output to Input | The alignment needs the front-panel AMPTD REF OUT cabled to the INPUT on this model. |
| 653 | Auto Align not available when using Calibration Defaults | Calibration defaults are loaded, so auto alignment is off until Align Now, All has been run successfully. |
| 767 | Failed to Initialize ISTATE regions. Fatal LDS error | The instrument state memory could not be initialized at power-up. Cycle power; if it repeats, the processor or its memory needs service. |
E4407B status messages
| Status message | Meaning |
|---|---|
| 50 MHz Osc Unlevel | The internal 50 MHz amplitude reference is unleveled. Alignments cannot run correctly until this is fixed; points to the calibrator/reference circuitry. |
| First IF Overload | The first IF is overdriven. Increase attenuation or reduce the input; with no input applied it indicates an RF/IF fault. |
| Frequency Reference Error (Freq Ref Unlocked) | The frequency reference loop is unlocked or near unlock. On external reference, check the source matches the entered value; on internal reference it is a reference-board fault. |
| LO Unlock (Synth Unlocked) | The LO phase-lock circuitry is unlocked. Readings are invalid until it is repaired. |
| LO Unlevel (LO Unleveled) | The LO drive is unleveled inside the instrument, causing low or unstable signal levels. |
| ADC / IF / LO / RF Align Failure | Status bits that are set when a particular alignment routine fails. The failing routine identifies the section to troubleshoot. |
| Source LO Unlock / Source Unlevel | Tracking generator LO lost lock, or TG output cannot hold the set level. Check frequency and power are inside TG limits first; otherwise a TG board fault. |
E4407B setup messages
| Error | Message | Meaning |
|---|---|---|
| 129 | Meas Uncal | Sweep is too fast for the RBW/VBW. Increase sweep time or press Auto Couple. |
| 163 | Freq Count: Reduce Span/RBW ratio | Span is too wide for the RBW to count a marker. Narrow the span or widen the RBW. |
| 201 | Option not installed | The function needs an option this unit does not have. |
| 202 | No peak found | No signal met the peak search criteria. |
| 204 | TG Frequency Limit | The tracking generator has reached the end of its frequency range. |
| 208 | Preselector is not available at this frequency | Preselector centering only works above about 3 GHz. |
| 209 | Preselector centering failed | Centering was attempted with too wide a span or no usable signal. |
| 211 | RBW limited to 1 kHz when Span > 5 MHz | Digital RBWs under 1 kHz are only available in narrower spans. |
| 214 | TG start freq is less than 9 kHz | Tracking generator is uncalibrated below 9 kHz. |
| 224 | Option not licensed | The option is present but has no license key installed. |
| 751 | Instrument state set to initial values | A saved or power-on state was corrupt and defaults were loaded. |
| 757 | Unable to load user state, factory preset was done | The user preset is invalid; save a good state as the user preset. |
| 769 | Invalid instrument mode | The requested measurement personality is not installed. |
E4407B file and storage errors
| Error | Message |
|---|---|
| 604 | File exists |
| 605 | Media is protected |
| 607 | File name error |
| 609 | Media is not writable |
| 612 | File not found |
| 613 | Flash memory is full |
| 614 | Bad, missing, or unformatted disk |
| 615 | File is corrupt |
| 617 | Wrong density floppy inserted |
E4407B SCPI error ranges
| Range | Class |
|---|---|
| −100 to −199 | Command errors (syntax, header) |
| −200 to −299 | Execution errors (setting out of range, not allowed now) |
| −300 to −399 | Device-specific errors (queue overflow, self-test, memory) |
| −400 to −499 | Query errors (unterminated or interrupted query) |
LO unlock, alignment failure or IF overload on your E4407B? Analyzer Repair Inc. repairs and calibrates the Agilent E4407B in-house in Cocoa, Florida, including YTO, RF assembly, synthesizer and IF board faults. Free estimate once the unit is in our lab. Contact us for service.
Message numbers from Agilent ESA/PSA Instrument Messages and Functional Tests (E4440-90619); assembly references from the Agilent ESA Spectrum Analyzers Service Guide.
Agilent / HP E4407B Replaceable Parts – click to expand
Agilent E4407B Replaceable Assemblies and Part Numbers
Board and RF module part numbers for the Agilent E4407B. Exchange and refurbished numbers are factory-rebuilt units traded for the old assembly.
| Reference | Assembly | Agilent part number | Notes |
|---|---|---|---|
| A1A1 | Front panel interface board kit | E4401-60241 | |
| A1A1A1 | Rotary pulse generator (RPG) | 1990-1865 | |
| A1A2 | LCD assembly kit | E4401-60242 | Serial prefix US4119 and above (earlier units take E4401-60241 and E4401-60242) |
| A1A2DS1/DS2 | Display backlight | 2090-0577 | Upper and lower |
| A1A3 | Front frame assembly | E4401-60257 | Except Option 060 |
| A1MP5 | Main keypad | E4401-40002 | |
| A2A1 | 3.0 GHz TG driver board with shields | E4403-60043 | Option 1DN (exchange E4403-69043) |
| A2A2 | 3.0 GHz BITG microcircuit | 5086-7993 | Option 1DN (exchange 5086-6993) |
| A2A3 | 3.0 GHz TG output attenuator | 0955-0679 | Option 1DN |
| A3 | IF assembly with shields | E4401-60183 | |
| A4 | Processor assembly, enhanced memory | E4401-60233 | Option B72 |
| A4A1 | Flash SIMM, 4 MB | E4401-60105 | 12 MB E4401-60081 with Option B72 |
| A4A2 | DRAM SIMM, 32 MB | E4401-60289 | Option B72 |
| A4MAU58 | Lithium battery, 3 V | 1420-0556 | |
| A5 | Power supply assembly | E4401-60186 | |
| A5B1 | Fan | 3160-0866 | |
| A6 | Speaker/floppy assembly | E4401-60008 | |
| A7 | Motherboard, ESA-E series | E4401-60107 | |
| A7A1 | IF/video/sweep ports | E4401-60096 | Option A4J |
| A7A2 | GPIB assembly | E4401-60013 | Option A4H |
| A7A3 | RS-232 assembly | E4401-60014 | Option 1AX |
| A7A4 | Frequency extension assembly | E4404-60001 | |
| A7A5 | Fast ADC assembly | E4401-60083 | Option AYX |
| A7A6 | FM demod assembly | E4401-60343 | Option BAA |
| A7A7 | Digital demod DSP assembly | E4401-60088 | Option B7D |
| A7A8 | Digital demod RF assembly | E4401-60285 | Option B7E |
| A7A9 | ACPR dynamic range extension | E4403-60065 | Option 120 |
| A7A10 | Bluetooth FM demodulator | E4403-60223 | |
| A7A12 | IF out assembly | E4403-60076 | Option H55 |
| A7A12 | IF out assembly | E4404-60034 | Option H70 |
| A8 | 3 GHz RF complete assembly | E4403-60073 | Without precision reference (exchange E4403-69073) |
| A8 | 3 GHz RF complete assembly | E4403-60074 | With Option 1D5 precision reference (exchange E4403-69074) |
| A8A1A1 | Reference/third converter (top board) | E4403-60001 | Without precision reference |
| A8A1A1 | Reference/third converter (top board) | E4403-60053 | Option 1D5 |
| A8A1A2 | 3 GHz RF front end/LO (bottom board) | E4403-60033 | |
| A8A1A2MC1 | YIG oscillator | 0955-1039 | |
| A8A2 | Second converter | 5086-7958 | |
| A8A3 | DC block | E4403-60026 | Except Option UKB |
| A8A4 | LO amplifier/IF switch (LOIS) | E4404-60030 | Exchange E4404-69030 |
| A8A5 | Input attenuator, 26.5 GHz | 33321-60057 | Except Option UKB (UKB: 33321-60061) |
| A8A6 | YIG-tuned harmonic mixer (RYTHM), 26.5 GHz | 5087-7031 | Exchange 5087-6031 |
| A8FL1 | Low pass filter, 3.1 GHz | 0955-0988 | |
| A8J1 | RF input Type-N connector kit | E4403-60015 | Except Option 060 |
| A8J1 | RF input APC-3.5 connector kit | E4407-60002 | Option BAB |
Part obsolete? Many E4407B assemblies are no longer sold new. Analyzer Repair Inc. repairs E4407B RF assemblies, YTOs, IF and synthesizer boards at the component level in Cocoa, Florida. Free estimate once the unit is in our lab. Contact us for service.
From the Agilent ESA Spectrum Analyzers Service Guide.
Located in: Spectrum Analyzers