EMCO / ETS-Lindgren 7405 E/H Near Field Probes
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.
EMCO / ETS-Lindgren 7405 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
EMCO / ETS-Lindgren 7405 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 |
|
