Comb Generators

An EMC Comb Generator is a signal source that produces a series of narrow spectral spikes (resembling the teeth of a comb) at precise, regular frequency intervals. It is primarily used as a reference source to validate and calibrate EMC (Electromagnetic Compatibility) test setups.

Why Use a Comb Generator?

System Verification: Before starting an expensive compliance test, a comb generator allows you to check that your spectrum analyser, cables, and antennas are all working correctly. If the "teeth" don't appear at the expected levels, you know there is a fault in your measurement chain.

Normalization of Test Environments: It helps compare different test sites (e.g., an Open Area Test Site vs. an Anechoic Chamber) by providing a stable, known emission source that can be moved between them.

Cable and Filter Characterisation: By injecting a comb signal through a cable or filter, you can instantly see the frequency response across a wide range without needing to manually sweep a signal generator.

Quick "Go/No-Go" Checks: It provides a fast way to verify that your pre-compliance setup is still "in-tune" and hasn't drifted since its last formal calibration.

Core Applications

Radiated Emissions Testing: Battery-powered, portable comb generators (like the Tekbox TBCG1) are placed inside a test chamber to act as a "standard emitter" to check antenna and receiver performance from 100MHz up to 6GHz.

Conducted Emissions Reference: Some models (like the TBCG3-CN) are designed to be plugged directly into a LISN (Line Impedance Stabilisation Network) to verify that conducted noise measurements are accurate.

Shielding Effectiveness: By placing a comb generator inside a shielded enclosure or "taped" box, you can measure how much signal "leaks" out, helping to identify gaps or weak points in EMI shielding.

Frequency Multiplier: Passive comb generators (like the TBCG2) can take a lower-frequency input and "multiply" it into the GHz range, creating a broad reference signal for general laboratory use.

SKU	Brand	Frequency Range	Comb Freq	Ext Input	Supply	Additional Features	Application	Stock	Price
TBCG3-CN	Tekbox	5 kHz - 2 GHz	0.1 MHz, 0.5 MHz, 1 MHz, 5 MHz, 10 MHz, 5 kHz - 300MHz	Yes	4xNiMH, AA	External universal charger	Reference for conducted emissions	On Backorder	£1,110.00
TBCG3-RN2	Tekbox	5 kHz - 2 GHz	5 MHz, 10 MHz, 25 MHz, 50 MHz, 100 MHz, 5 kHz - 200MHz	Yes	6xNiMH, AA	2 monopole antennas, External universal charger	Reference for radiated emissions	1	£1,391.00
TBCG3-RN6	Tekbox	5 kHz - 6 GHz	5 MHz, 10 MHz, 25 MHz, 50 MHz, 100 MHz, 5 kHz - 200MHz	Yes	6xNiMH, AA	2 monopole antennas, External universal charger	Reference for radiated emissions	On Backorder	£1,577.00
TBCG4	Tekbox	5 MHz - 1 GHz	5 MHz, 10 MHz, 20 MHz	No	USB	USB-A to USB-C cable	General purpose comb generator	2	£390.00
TBCG1-	Tekbox	100 MHz - 6 GHz	100 MHz	No	9V Battery	-	Reference for radiated emissions	On Backorder	£95.00
TBCG1	Tekbox	30 MHz - 6 GHz	25 MHz	No	9V Battery	-	Reference for radiated emissions	On Backorder	£95.00
TBCG2	Tekbox	2 MHz - 6 GHz	2 MHz - 300 MHz	Only Ext	Passive	-	General purpose, frequency multiplier	3	£95.00

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TBCG3-CN COMB GENERATOR
£1,110.00 (£1,332.00 inc. VAT)
Available on back-order

Availability: Stock models delivered next working day (UK only) for orders placed before 16:30 (Mon - Fri)
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TBCG3-RN2 COMB GENERATOR
£1,391.00 (£1,669.20 inc. VAT)
1 in stock (can be backordered)

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TBCG3-RN6 COMB GENERATOR
£1,577.00 (£1,892.40 inc. VAT)
Available on back-order

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TBCG4 General Purpose Comb Generator
£390.00 (£468.00 inc. VAT)
2 in stock (can be backordered)

Availability: Stock models delivered next working day (UK only) for orders placed before 16:30 (Mon - Fri)
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TEKBOX TBCG1-100MHz Radiating Comb Generator
£95.00 (£114.00 inc. VAT)
Available on back-order

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TEKBOX TBCG1-25MHz Radiating Comb Generator
£95.00 (£114.00 inc. VAT)
Available on back-order

Availability: Stock models delivered next working day (UK only) for orders placed before 16:30 (Mon - Fri)
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TEKBOX TBCG2 COMB GENERATOR/FREQUENCY MULTIPLIER
£95.00 (£114.00 inc. VAT)
3 in stock (can be backordered)

Availability: Stock models delivered next working day (UK only) for orders placed before 16:30 (Mon - Fri)
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