RF Current Monitoring Probes

The voltage produced by RF current monitoring probes into a 50-ohm load is proportional to the current flowing through the wires going through the probe aperture. RF current monitoring probes, like LISNs, are used to measure conducted emissions. RF current probes measure the current of conducted emissions, whereas LISNs measure the voltage. Current monitoring probes are not intrusive. It is not necessary to separate the wire harness under test. In addition, RF current monitoring probes typically cover a wider frequency range than LISNs. The EMC standards indicate where LISNs must be used and where current monitoring probes must be used. The primary use is conducted emission measurement on data or control cables. Furthermore, RF current monitoring probes are very versatile tools for the investigation and improvement of EMC issues and for many other applications.
Tekbox RF current monitoring probes cover the frequency range up to 1 GHz. The series with fixed aperture are especially inexpensive. In circumstances, where the cable harness cannot simply be disconnected to feed it through the aperture, Tekbox offers the TBCP2 series snap on probes.
To calculate the corresponding current flowing through the wires passing the probe aperture, subtract the individually documented trans-impedance value in [dB] from the probe’s output voltage.

Model	TBCP1-200	TBCP1-250	TBCP1-500	TBCP2-250	TBCP2-30K400	TBCP2-500	TBCP2-750	TBCP3-1000	TBCP4-250	TBCP4-500	TBCP4-750
Characterized frequency range	1 kHz-500 MHz	1 kHz-300 MHz	1 kHz-500 MHz	1 kHz-400 MHz	10 Hz-500 MHz	1 kHz-600 MHz	1 kHz-1 GHz	1 kHz-1 GHz	1 kHz-400 MHz	1 kHz-600 MHz	1 kHz-1 GHz
3dB bandwidth	40 kHz-200 MHz	300 kHz-250 MHz	400 kHz-500 MHz	300 kHz-300 MHz	30 kHz-400 MHz	1 MHz-500 MHz	1.5 MHz-850 MHz	3 MHz-1 GHz	200 kHz-300 MHz	400 kHz-500 MHz	1.5 MHz-850 MHz
Trans-impedance	17 dBΩ	18 dBΩ	19 dBΩ	13 dBΩ	3 dBΩ	16 dBΩ	20 dBΩ	20 dBΩ	13 dBΩ	16 dBΩ	20 dBΩ
Aperture diameter	25 mm	25 mm	25 mm	32 mm	32 mm	32 mm	32 mm	17 mm	32 mm	32 mm	32 mm
Snap on / hinge	no	no	no	yes	yes	yes	yes	no	no	no	no
Product Page	TBCP1-200	TBCP1-250	TBCP1-500	TBCP2-250	TBCP2-30K400	TBCP2-500	TBCP2-750	TBCP3-1000	TBCP4-250	TBCP4-500	TBCP4-750

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High Saturation RF Current Monitoring Probes

Model	TBCP2-1M800	TBCP2-1M100	TBCP2-6M300	TBCP2-3M900	TBCP2-20M700	TBCP2-30M1000	TBCP5-150K400
Characterized frequency range	10 kHz – 1 GHz	10 kHz – 200 MHz	10 kHz – 500 MHz	10 kHz – 1 GHz	10 kHz – 800 MHz	10 kHz – 1 GHz	10 Hz – 500 MHz
3dB bandwidth	1 MHz – 800 MHz	1 MHz – 100 MHz	6 MHz – 300 MHz	3 MHz – 900 MHz	20 MHz – 700 MHz	30 MHz – 900 MHz	150 kHz – 400 MHz
Trans-impedance	0 dBΩ, typ.	3 dBΩ, typ.	10 dBΩ, typ.	10 dBΩ, typ.	20 dBΩ, typ.	22 dBΩ ± 2 dBΩ from 25 MHz – 1 GHz	11 dBΩ
Max. RF Current	10 A	40 A	20 A	3 A	15 A	10 A	2 A
Saturation DC-400Hz	≥ 400A	≥ 400A	≥ 400A	≥ 100A	≥ 100A	≥ 50A	≥ 200A
Aperture diameter	32 mm	32 mm	32 mm	32 mm	32 mm	32 mm	46 mm
Snap on / hinge	yes	yes	yes	yes	yes	yes	yes
Application	High frequency; High saturation	High frequency; High saturation	High frequency; High saturation	High frequency; High saturation	High frequency; High saturation	High frequency; High saturation	High frequency; High saturation
Product Page	TBCP2-1M800	TBCP2-1M100	TBCP2-6M300	TBCP2-3M900	TBCP2-20M700	TBCP2-30M1000	TBCP5-150K400

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RF Surface Current Monitoring Probes

RF Surface current monitoring probes are utilised in applications where RF currents flowing on surfaces such as PC groundplanes or traces, metal planes or wires must be measured.

Model	TBSCP1-5M300	TBSCP1-10M500
Characterized frequency range	30 kHz – 400 MHz	30 kHz – 600 MHz
Trans-impedance	-7 dBΩ	-5 dBΩ
Footprint	40 x 15 mm	40 x 15 mm
Product Page	TBSCP1-5M300	TBSCP1-10M500

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Coaxial RF Current Monitoring Probes

Coaxial RF current monitoring probes are used to measure RF currents in coaxial cables. They can be used as general purpose coupling devices to measure RF power or as loop antenna transducers.

Model	TBCCP1-2K70	TBCCP1-3K100	TBCCP1-400K600
Characterized frequency range	10 kHz – 100 MHz	10 Hz – 100 MHz	10 Hz – 600 MHz
Trans-impedance	0 dBΩ	+5 dBΩ	+23 dBΩ
Application	Transducer for large loop antennas (LLA)	General purpose coupling device	General purpose coupling device
Product Page	TBCCP1-2K70	TBCCP1-3K100	TBCCP1-400K600

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RF pulse Current Monitoring Probes

RF pulse Current Monitoring Probes are typically used for surge or RF pulse current monitoring applications in the time domain.

Model	TBPCP1-20100	TBPCP2-3070	TBPCP3-05H30	TBPCP3-2H40	TBPCP3-20H70	TBPCP3-100H80	TBPCP4-1H30	TBPCP4-5H50	TBPCP4-50H50	TBPCP4-100H60
Trans-impedance @ 50Ω	-20 dBΩ 0.1 V/A	-26 dBΩ 0.05 V/A	-26 dBΩ 0.05 V/A	-20 dBΩ 0.1 V/A	-12 dBΩ 0.25 V/A	-6 dBΩ 0.5 V/A	-26 dBΩ 0.05 V/A	-20 dBΩ 0.1 V/A	-12 dBΩ 0.25 V/A	-6 dBΩ 0.5 V/A
Trans-impedance @ HighZ	0.2 V/A	0.1 V/A	0.1V/A	0.2V/A	0.5V/A	1V/A	0.1V/A	0.2V/A	0.5V/A	1V/A
3 dB bandwidth	20 Hz-100 MHz	30 Hz-70 MHz	0.5 Hz–30 MHz	2 Hz–40 MHz	20 Hz–70 MHz	100 Hz–80 MHz	1 Hz–30 MHz	5 Hz–50 MHz	50 Hz–50 MHz	130 Hz–60 MHz
Characterized frequency range	1 Hz-200 MHz	1 Hz-200 MHz	0.1 Hz–100 MHz	1 Hz–100 MHz	1 Hz–100 MHz	1 Hz–100 MHz	0.1 Hz–100 MHz	1 Hz–100 MHz	1 Hz–100 MHz	1 Hz–100 MHz
Droop rate	10 %/ms	20 %/ms	0.12 %/ms	0.3 %/ms	6 %/ms	0.02 %/µs	0.2 %/ms	0.5 %/ms	7 %/ms	0.06 %/ms
Rise time	< 5 ns	< 5 ns	< 10 ns	< 9 ns	< 9 ns	< 8 ns	< 10 ns	< 9 ns	< 10 ns	< 10 ns
Max. peak current	3000 A	600 A	5000 A	2000 A	1500 A	600 A	5000 A	3500 A	2500 A	1000 A
IT Max	0.08 As	0.02 As	0.25 As	0.1 As	0.03 As	0.007 As	0.7 As	0.4 As	0.1 As	0.02 As
I/f	0.3 peak A/Hz	0.07 peak A/Hz	1.5 peak A/Hz	0.6 peak A/Hz	0.125 peak A/Hz	0.06 peak A/Hz	2.8 peak A/Hz	1.5 peak A/Hz	0.5 peak A/Hz	0.25 peak A/Hz
Max. RMS current	120 A	15 A	55 A	70 A	40 A	20 A	150 A	150 A	60 A	60 A
Aperture diameter	25 mm	5.5 mm	15 mm	15 mm	15 mm	15 mm	46 mm	46 mm	46 mm	46 mm
Outer diameter	76 mm	27 mm	61 mm	61 mm	61 mm	61 mm	124 mm	124 mm	124 mm	124 mm
Height	31 mm	19 mm	30 mm	30 mm	30 mm	30 mm	37 mm	37 mm	37 mm	37 mm
Weight	320 g	60 g	320 g	320 g	320 g	320 g	1050 g	1050 g	1050 g	1050 g
Product Page	TBPCP1-20100	TBPCP2-3070	TBPCP3-05H30	TBPCP3-2H40	TBPCP3-20H70	TBPCP3-100H80	TBPCP4-1H30	TBPCP4-5H50	TBPCP4-50H50	TBPCP4-100H60

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Current Probe calibration fixtures

Current Probe Calibration Fixtures are used for calibrating / measuring the transimpedance of current probes. Calibrators are also required for the calibration of immunity test setups with BCI probes.

Model	TBCP1-CAL	TBCP2-CAL	TBCP3-CAL	TBCP4-CAL	TBCP5-CAL	TBPCP2-CAL	TBPCP3-CAL	TBPCP4-CAL	TBEMCL1-CAL
Application	TBCP1 series, TBPCP1-20100	TBCP2 series	TBCP3 series	TBCP4 series	TBCP5 series	TBPCP2-3070	TBPCP3 series	TBPCP4 series	EM-clamp calibrator
Product Page	TBCP1 series, TBPCP1-20100	TBCP2 series	TBCP3 series	TBCP4 series	–	–	–	–	TBEMCL1-CAL

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Bulk Current Injection Probes

Bulk Current Injection Probes are used to inject RF-current into cables of electrical equipment to test the susceptibility against radiated electromagnetic energy. Tekbox BCI-probes can be clamped around wire bundles with up to 27 mm. They are designed to meet the specifcations of the standards IC 61000-4-6 (domestic and industrial products) and ISO 11452-4 (automotive products).

Tekbox supplies suitable wideband power amplifiers to drive the BCI probes:

TBMDA-CDN25 for immunity tests according to IC 61000-4-6
TBMDA-BCI25 for immunity tests according to ISO 11452-4

The calibration fixture TBBCI1-CAL is suitable for both BCI-probe models

Model	TBBCI1-200K280	TBBCI1-300K420-HV	TBBCI1-800K420	TBBCI1-CAL
Frequency range	150 kHz – 230 MHz	300 kHz – 400 MHz	1 MHz – 400 MHz	150 kHz – 400 MHz
Coupling loss	8 dB typical	5 dB typical	5 dB typical	–
Maximum RF input power	50W continuous 100W short time	50W continuous 100W short time	50W continuous 100W short time	500 W
Aperture diameter	27 mm	27 mm	27 mm	–
Outer dimensions	92 x 76 mm	92 x 76 mm	92 x 76 mm	200 × 150 × 140 mm
Application / Standard	BCI probe for IEC / ISO 61000-6-4	BCI probe for ISO 11452-4; MIL-STD-461 CS114, GJB 151B-2013, DO-160	BCI probe for IEC / ISO 11452-4	BCI probe calibrator for IC / ISO 61000-6-4 IEC / ISO 11452-4
Product Page	TBBCI1-200K280	TBBCI1-300K420-HV	TBBCI1-800K420	TBBCI1-CAL

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Current Coupler

Model	TBMHA1
Mains Voltage Range	100 V–120 V/200 V–240 V switchable
Max Mains Current	16A, depending on country specific output socket
Transducer factor	50 mV/A with 50 Ohm load resistor
Mains Input Socket	C19, 16 A
Mains Output Socket	country specific
Current Output Socket	BNC female
Product Page	TBMHA1

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Powerline Ripple Detectors

Model	TBPRD-CS101-240V
Characterized frequency range	10 Hz to 300 kHz
Insertion loss above 50 Hz	>80 dB ± 1 dB with toggle in "Flat response" position
Input voltage range	100 V AC to 240 V AC 100 V DC to 270 V DC
Maximum input voltage	240 V AC, 270 V DC
Input connectors	4 mm safety sockets
Output connector	BNC female
Fuse	50 mA, fast Littlefuse 0217.050MXP
Product Page	TBPRD-CS101-240V