Values indicated below are typical values; isolation exceeds 80 dB in all the specified frequency bands:

• 700 to 1000 MHz: Typ. 90 dB

• 1700 to 2000 MHz: Typ. 90 dB

• 2000 to 2500 MHz: Typ. 85 dB

• 5000 to 6000 MHz: Typ. 80 dB

The 4921 RF Shield meets the needs of production and repair centers in terms of isolation of the under test from adjacent units and other RF equipment such as radio base stations. It surpasses the stringent shielding requirements for 3G mobile phone testing of 80 dB attenuation between the phone under test and other phones and base stations.

The RF absorption inside the 4921 RF Shield leads to low reflection within the box and thus supports high-precision, stable RF measurement results with instruments connected to the RF Shield, such as the 4400 Mobile Phone Tester Series.

For service centers and manufacturing lines, the 4921 RF Shield is the optimum solution not only in terms of shielding and measurement precision but also in terms of longevity, giving the 4921 RF Shield a unique price-performance ratio.

The 4921 RF Shield is easy to use thanks to the solid rocker arm lever and gas springs that allow the operator to smoothly open and close the box, without using much force. When closed, the lid is firmly locked.

A removable plate on the rear can be used to hold customerspecific connectors, e.g. for an interface for remote-controlling the unit under test.