Resources & Application Notes

The Window Option: See Inside a Shielded Enclosure Without Losing Isolation

Add an RF shielded viewing window to any suitably sized RF test enclosure — over 70 dB of shielding while still letting more than 70% of the light through.

By John Ramsey 4 min read Founder & Principal Engineer

What the window option adds to your enclosure

Add an RF shielded viewing window to any suitably sized RF test enclosure. The newly designed, JRE patented viewing window utilizes a unique lamination of conductive PET plastic layers with novel grounding to provide RF shielding of over 70 dB while still allowing a light transmission of greater than 70%.

Included is a lighting system with dual brilliant LED illumination 'boards' as well as a rechargeable Li-Ion battery pack and charger. The LED illumination boards may be mounted anywhere inside the enclosure and since it is battery powered, does not require any connection through your I/O Interface plate for power.

  • Window area: 10.5 x 4.5 inches, 265 x 115 mm
  • JRE Patented improved design for maximum shielding
  • Requires minimum 12 x 6 inch, 305 x 155 mm mounting area
  • Dual layer laminate of PET window layers
  • Excellent RF Isolation of 70 dB
  • 70% light transmission
  • Includes self powered LED lighting - 350 lumens
A shielded viewing window set into the wall of a JRE 1812WS enclosure, with the lit interior and the items inside clearly readable through the glazing
Figure 1. The window option on a JRE 1812WS. With the LED lighting on, the contents of a sealed enclosure stay legible from outside.
−80 dB @ 1 GHz
−75 dB @ 3 GHz
−70 dB @ 6 GHz
Over 70 dB of shielding while still allowing greater than 70% light transmission.

Where and how the window mounts

Required mounting area is 12 x 6 inches and can be installed on any wall of the enclosure, although the cover is preferred. Of course, a cut-out in the enclosure wall is required for the window area, as well as mounting screw holes. For this reason, it is best to add the window option at the time of purchase, so that the necessary enclosure modifications can be done at the factory. The same window is used on the JRE 1812F for forensics work.

Close-up through the shielded window of a test enclosure: a handheld device is held inside the chamber and its screen, reading Locating Satellites, is sharply legible through the window
Figure 2. Excellent clarity viewing through the window — a device screen inside the sealed enclosure stays readable from outside.

Features and benefits at a glance

  • JRE Patented improved window design
  • Over 70 dB of shielding
  • 70% Light transmission
  • Includes lighting assembly - 350 Lumens
  • Retrofitable into any suitably sized enclosure

Isolation and dimensions (specifications)

Isolation: −80 dB @ 1 GHz, −75 dB @ 3 GHz, −70 dB @ 6 GHz

DimensionInchesMillimeters
Window area10.5 x 4.5 in265 x 115 mm
Mounting area12 x 6 in305 x 155 mm

Frequently asked questions

The window provides over 70 dB of RF shielding — specifically −80 dB at 1 GHz, −75 dB at 3 GHz, and −70 dB at 6 GHz — while still allowing greater than 70% light transmission. It uses a unique lamination of conductive PET plastic layers with novel grounding to maintain isolation through a viewable area.

Yes — it's retrofitable into any suitably sized enclosure. It can be installed on any wall, though the cover is preferred. A cut-out for the window area plus mounting screw holes are required, so it's best to add the window at the time of purchase so the enclosure modifications can be done at the factory.

You need a minimum mounting area of 12 x 6 inches (305 x 155 mm). The visible window area itself is 10.5 x 4.5 inches (265 x 115 mm).

No. The included lighting system uses dual LED illumination boards (350 lumens total) powered by a rechargeable Li-Ion battery pack and charger. The boards mount anywhere inside the enclosure and, because they're battery powered, require no connection through your I/O interface plate for power.
Related record · inquiry
Ask an Engineer

Tell us what connections your device needs.

Tell us what connections you need to your device under test — USB, Ethernet, RS-232, RF connectors, etc. We'll spec it out with you. No cart, no checkout: you send an inquiry and we quote it.

Ask an Engineer