Repair and Service Evaluation – HP/Agilent E7401A, E7402A, E7403A, E7404A, E7405A

The HP/Agilent E7400A series spectrum analyzers (E7401A, E7402A, E7403A, E7404A, E7405A) are full-featured instruments engineered for EMI pre-compliance testing and in-house product evaluation during development. These analyzers enable early identification and resolution of potential emissions issues before formal compliance testing. Operating as standalone spectrum analyzers or integrated with broadband antennas and Line Impedance Stabilization Networks (LISNs), they assess both radiated and conducted emissions across device power and data lines. Close-field probe accessories such as the 11940A and 11941A support focused troubleshooting and source isolation when emissions problems are identified.

– Technical Specifications

Frequency Performance
• Frequency reference accuracy: ±(frequency indication × frequency reference error + span accuracy + 15% of RBW + 10 Hz) + 1 Hz × N (where N is LO harmonic mixing mode)
• Frequency reference error: Aging rate ±1 × 10⁻⁷/year; temperature stability ±1 × 10⁻⁸
• Marker frequency counter accuracy: ±(marker frequency × frequency reference error + counter resolution)
• Counter resolution: Selectable 1 Hz to 100 kHz
• Frequency span range: 0 Hz (zero span) to full analyzer range
• Span accuracy: Linear sweep ±0.5% of span; log sweep ±2% of span (characteristic)

Amplitude Performance
• Displayed average noise level (DANL): Typically ≤ −150 dBm
• Third order intercept (TOI): Typically +12.5 dBm
• Second harmonic distortion (SHI): Typically +45 dBm
• Resolution bandwidth (RBW): 1 Hz to 3 MHz (−3 dB) in 1-3-10 sequence; extendable to 5 MHz on E740x A models
• Video bandwidth (VBW): 30 Hz to 3 MHz in 1-3-10 sequence; range 1 Hz to 3 MHz with 1 Hz to 300 Hz available in spans ≤ 5 MHz

Model-Specific Frequency Ranges
• E7401A: 9 kHz to 1.5 GHz
• E7402A: 9 kHz to 3.0 GHz (DC coupled: 30 Hz to 3.0 GHz; AC coupled: 100 kHz to 3.0 GHz)
• E7403A: 9 kHz to 6.7 GHz
• E7404A: 9 kHz to 13.2 GHz
• E7405A: 9 kHz to 26.5 GHz (DC coupled: 30 Hz to 3.6 GHz; AC coupled: 100 MHz to 3.6 GHz)

– Key Features

• Automatic EMI measurements and log sweep capability
• Built-in preamplifier for enhanced sensitivity
• Optional tracking generator on select models
• Portable, rugged construction
• SCPI programming and IVI COM driver support
• Internal 3.5-inch disk drive for data storage
• Compatible with Agilent E7415A EMI software

– Compatibility & Integration

These analyzers integrate with broadband antennas for radiated emissions assessment and couple to power/data lines via LISNs or absorbing clamps for conducted emissions evaluation. Close-field probe accessories enable detailed troubleshooting.