Spectrian Power Measurement

[G4uvz]

I am now at the modification / power measurement phase.

I have a Racal 1GHz 30watt power meter but the estimated 30 + watts reads but a few mWatts!

So I resorted to the trusty HP432A with appropriate attenuators but this is where I run into problems, the largest

power attenuator is rated at 10 Watts.

I have tried using some old UR67 which gives around 12dB attenuation at 2400MHz when tested at the 2-3 watt level

I am assuming that the results can be extrapolated to higher power levels......is this valid?

Between the amplifier and the UR67 I have a 5M tail of brand new RG402 ....2dB loss? https://www.ebay.co.uk/itm/5m-RG402-RF- ... 2749.l2649

This gets warm to the touch throughout it's length...

Adrian

[g8vpg]

Adrian,
When measuring these power levels, I use a calibrated coupler to take a 20dB sniff from the amplifier output line. This makes getting rid of the power before the sensor much easier. You're welcome to make a visit.
73 Shaun.

[g8gtz]

Hi Adrian

I have tried using some old UR67 which gives around 12dB attenuation at 2400MHz when tested at the 2-3 watt level

I am assuming that the results can be extrapolated to higher power levels......is this valid?

Yes, absolutely - that's the method I used before I bought a beefy 30dB 4GHz pad

Noel

[G4uvz]

Thanks guys for the thoughts,,I may have a coupler somewhere I could try ..if ot a trip tp Bristol would seem to be in order!

A