The EMCO / ETS-Lindgren 7405 E/H Near Field Probes are a passive, near field probe set designed as a diagnostic aid for locating and characterizing sources of E and H Field emissions. The set consists of three loop probes, one stub and one ball probe, an extension handle, an optional battery-powered preamplifier, and a foam-lined carrying case with a manual and application note.
The handle of each probe terminates in a BNC connector. Probes are designed to be used with a signal analyzing device such as an oscilloscope or spectrum analyzer. The optional preamplifier is useful when signal amplification is necessary for the analyzing device.
The loop probes are H-Field selective and directional. Sensitivity is relative to loop diameter. For example, the 6 cm loop can be used to make a general survey for H-Field emissions, while the smaller diameter loops can isolate specific sources.The ball and stub probes are E-Field selective and omni-directional. The stub probe is designed for precise E-Field source location, such as signal traces or IC pins. The ball probe has a large sensing element and is capable of locating weaker signals.
Typical applications include locating and characterizing emissions from PCBs, ICs, etch runs, cables, cover seams, etc.
Features
- Broadband Frequency Range
- Linear Response
- Locates both E and H Field
- Emissions Sources
- Specialized Sizes / Shapes for Sensitivity
- Includes Free Carrying Case
- New Optional Preamplifier for Signal Amplification
Specifications
Electrical Characteristics of Probes |
Model 7405 | Probe Type | Primary Sensor | E/H Or H/E Rejection | Upper Resonant |
901B | 6.0 cm Loop | H-Field | 41 dB | 790.0 MHz |
902B | 3.0 cm Loop | H-Field | 29 dB | 1.5 GHz |
903B | 1.0 cm Loop | H-Field | 11 dB | 2.3 GHz |
904B | 3.6 cm Ball | E-Field | 30 dB | > 1.0 GHz |
905B | 6.0 mm Stub Tip | E-Field | 30 dB | > 3.0 GHz |
Nominal Gain of Optional Preamplifier |
Frequency | Gain |
100 kHz | 35.5 dB |
1 MHz | 38.1 dB |
100 MHz | 37.2 dB |
1 GHz | 32.5 dB |
2 GHz | 25.0 dB |
3 GHz | 13.0 dB |
Electrical Characteristics of Optional Preamplifier |
Model 7405 | Bandwidth | Noise Figure (@ 100 MHz freq) | Saturated Output Power (@ 100 MHz freq) | 1db Gain Compression Intercept | Connector |
907B | 100 kHz3 GHz | 3.5 dB (typical) | +12.0 dBm (typical) | +10.0 dBm | TYPE BNC |
907BN | 100 kHz - 3 GHz | 3.5 dB (typical) | +12.0 dBm (typical) | +10.0 dBm | Type N |