CHEMANDY ELECTRONICS

FLEXI-BOX 6 dB Splitter

    The 6 dB Splitter is built in a FLEXI-BOX on a dedicated PCB. The connectors can be selected from BNC, N and SMA. The box has one 50Ω input and two 50Ω outputs. It is intended as a measurement aid. We can build and test these at Chemandy with an insertion loss of 6.0 dB + 0.2 dB at 0.3 MHz to 7.0 dB + 0.5 dB at 3 GHz.     

RESISTORS

    The 6 dB splitter uses standard 0805 1% resistors. The value required is 16.667 Ω, which is not a preferred value in the E12 series. This is overcome by using two 33Ω in parallel (16.5Ω). The use of two resistors in parallel also reduces the effect of the series inductance of the resistors and gives an improved insertion loss. This can be observed in the figure below. There is a similar improvement by using multiple resistors that can be seen in the results obtained for the Termination Box.

      This test aid is available Ready Built or in Kit form. The Kit contains the hardware only; i.e. box, pcb, connectors, screws etc. Components are not included because they are surface mount and  it is impossible to supply the correct amount because of the 'ping' factor. Anybody who has fitted surface mount components will know that when a component is being placed with a pair of tweezers there is often a 'ping' and the component disappears into thin air. We would have to supply at least two of every component thus doubling the cost.

A selection of escutcheon drawings are available for downloading as .zip or .bmp files.

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