Editorial Technical Reference

Tracking Generator

This page explains how Tracking Generator is classified within Computer, Electronic and Optical Product Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

A signal generator that synchronizes its output frequency with the sweep frequency of a spectrum analyzer.

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Product Specifications

Technical details and manufacturing context for Tracking Generator

Definition
A tracking generator is a specialized signal generator component integrated with or used alongside a spectrum analyzer. It produces a test signal whose frequency precisely follows the analyzer's sweep frequency, enabling measurement of device frequency response, insertion loss, and return loss by comparing the input and output signals. This component is essential for stimulus-response testing in RF and microwave applications, allowing engineers to characterize filters, amplifiers, cables, and other components. The tracking generator receives a frequency reference signal from the analyzer's sweep circuitry and uses it to generate a stable, calibrated RF output that is locked to the instantaneous frequency being analyzed. Key parameters include a frequency range of 100 kHz to 3 GHz, output power adjustable from -20 to +10 dBm, and frequency stability of ±1 ppm. The device offers sweep synchronization accuracy of ±0.1 dB, input and output impedance of 50 ohms, harmonic distortion less than -30 dBc, and spurious outputs less than -60 dBc. It operates over a temperature range of 0 to 50 °C and can be stored from -40 to 85 °C. The unit is powered by a 9 to 36 V DC supply, measures 210×88×250 mm, and weighs approximately 2.5 kg. It is constructed with semiconductor components such as VCOs and PLL ICs, RF connectors, and a printed circuit board. This directory entry provides reference specifications; actual values may vary by model and application. Always verify model-specific values and standards with the legal manufacturer or supplier before procurement or use.
Working Principle
The tracking generator receives a frequency reference signal, typically a local oscillator signal, from the spectrum analyzer's sweep circuitry. It uses this reference to generate a stable, calibrated RF output signal that is locked to and tracks the instantaneous frequency being analyzed. This allows for stimulus-response measurements where the device under test receives the tracking generator's signal, and the spectrum analyzer measures the output. The synchronization ensures that the output frequency matches the analyzer's sweep at all times, enabling accurate frequency response measurements.
Common Materials
Semiconductor components (e.g., VCO, PLL ICs), RF connectors, Printed circuit board
Technical Parameters
ParameterTypical rangeNotes & selection driver
Frequency Range100 kHz – 3 GHz HzCovers typical spectrum analyzer sweep ranges
Output Power-20–+10 dBmAdjustable level for mixer drive
Frequency Stability±1 ppmOver temperature range
Sweep Synchronization±0.1 dBTracking error relative to analyzer
Input Impedance50 ΩNominal, VSWR < 1.5
Output Impedance50 ΩNominal
Harmonic Distortion< -30 dBcAt rated output power
Spurious Outputs< -60 dBcNon-harmonic
Operating Temperature0–50 °CFull specifications met
Storage Temperature-40–85 °CNon-operating
Relative Humidity5–95 %Non-condensing
Power Supply9–36 V DCReverse polarity protected
Dimensions (W×H×D)210×88×250 mmBench-top form factor
Weight2.5 kgApproximate

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM
  • Voltage-Controlled Oscillator (VCO)
    Generates the RF signal at a frequency determined by an input control voltage.
    Material: Semiconductor (GaAs, SiGe)
  • Phase-Locked Loop (PLL) Circuit
    Locks the VCO output frequency to the reference signal from the spectrum analyzer for precise tracking.
    Material: Integrated circuit
  • RF Output Stage/Amplifier
    Amplifies and conditions the generated signal to the required output power level.
    Material: Semiconductor transistors, passive RF components
  • Control Interface
    Receives frequency and control data from the spectrum analyzer's mainframe.
    Material: Digital logic ICs, connectors

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Tracking Generator.

Swept Signal Generator

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Spectrum Analyzer
View system integration details

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Atmospheric (indoor lab environment)
sweep speed: Up to 100 ms per sweep (fast models)
temperature: 0°C to 50°C (operating), -20°C to 70°C (storage)
output power: -20 dBm to +10 dBm (typical)
frequency range: Typically 9 kHz to 26.5 GHz (model dependent)
Media Compatibility
✓ RF test environments ✓ EMI/EMC testing labs ✓ Telecommunications R&D facilities
Unsuitable: High-vibration industrial floors or outdoor environments without climate control
Sizing Data Required
  • Required frequency range (start/stop frequencies)
  • Needed output power level and flatness
  • Required sweep speed and synchronization method with analyzer

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Bearing failure
Cause: Inadequate lubrication, contamination, or misalignment leading to excessive wear, overheating, and eventual seizure or catastrophic failure.
Stator winding insulation breakdown
Cause: Thermal aging from overloading, moisture ingress, or contamination causing insulation degradation, leading to short circuits and ground faults.
Maintenance Indicators
  • Unusual audible vibrations or knocking sounds from the generator housing, indicating potential bearing wear or rotor imbalance.
  • Visible smoke, excessive heat, or burning odor from the generator casing, signaling overheating, insulation failure, or electrical faults.
Engineering Tips
  • Implement predictive maintenance using vibration analysis and thermography to detect early signs of bearing wear, misalignment, or overheating before catastrophic failure.
  • Ensure proper environmental control with sealed enclosures and desiccant breathers to prevent moisture ingress and contamination, protecting windings and insulation.

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards
ANSI/ASME B46.1-2009 CE Marking (EU Machinery Directive 2006/42/EC)

Quoted from the published standard.

Manufacturing Precision
  • Positional Accuracy: +/-0.05mm
  • Surface Finish: Ra 0.8μm
Quality Inspection
  • Dimensional Verification via CMM
  • Functional Performance Test

Manufacturers of Tracking Generator

Manufacturer profiles associated with Tracking Generator.

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Frequently Asked Questions

What is the frequency range of this tracking generator?

The frequency range is 100 kHz to 3 GHz, covering typical spectrum analyzer sweep ranges. Confirm the exact range for your specific model.

What is the output power range?

The output power is adjustable from -20 to +10 dBm, suitable for mixer drive. Verify the actual output power capability for your application.

What is the input and output impedance?

Both input and output impedance are 50 ohms nominal, with VSWR less than 1.5. Ensure your system matches this impedance for proper operation.

What are the operating temperature limits?

The operating temperature range is 0 to 50 °C, with storage from -40 to 85 °C. Ensure the device is used within these limits to maintain specifications.
Data basis: editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification
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