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ADAR2001-EVAL TEST Guide

Could anyone clarify and give me any advice?

Part : ADAR2001-EVAL
Input Freq. : 8GHz
Output Freq. : 32GHz
Loss compensation of the instrument and cable has been set.

We tested ADAR2001-EVAL.
RFOUT1+ was connected to SA (Spetrum Analyzer) with Single Ended.
Output Power : 5dBm

RFOUT1+ was connected to SA (Spetrum Analyzer) with combiner.
Output Power : 10.5dBm

This was measured higher than the datasheet.
This doesn't seem to be normal behavior, is there any workaround?

And,
What is the PART of Combiner presented in UserGuide?


Can you advise me

Please kindly help.
Please. Can someone tell me?

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  • Hello,

    In Figures 9, 12, 13 at the datasheet, the differential output power is about 7.5dBm typical @ 32GHz, 2.5V, Pin=-20dBm  that is 4.5dBm, 3dB lower at the single-ended output power while unused output is terminated to ground through 50ohm resistor. So your +5dBm is pretty close to what is expected.

    What does "RFOUT1+ was connected to SA (Spectrum Analyzer) with combiner." mean? Do you mean"RFOUT1+ /-, differential output is connected to a 2:1 combiner and to S.A? And Pout is +10.5dBm at this configuration, right?

    Then +5dBm @ Single-ended, +10.5dBm @ Differential with 2:1 combiner. That is not what was expected. Please double-check if you used the right combiner and the loss was compensated correctly? 

    We used Pulsar Microwave, JSO-50-471/6S in product characterization.

    Thanks

Reply
  • Hello,

    In Figures 9, 12, 13 at the datasheet, the differential output power is about 7.5dBm typical @ 32GHz, 2.5V, Pin=-20dBm  that is 4.5dBm, 3dB lower at the single-ended output power while unused output is terminated to ground through 50ohm resistor. So your +5dBm is pretty close to what is expected.

    What does "RFOUT1+ was connected to SA (Spectrum Analyzer) with combiner." mean? Do you mean"RFOUT1+ /-, differential output is connected to a 2:1 combiner and to S.A? And Pout is +10.5dBm at this configuration, right?

    Then +5dBm @ Single-ended, +10.5dBm @ Differential with 2:1 combiner. That is not what was expected. Please double-check if you used the right combiner and the loss was compensated correctly? 

    We used Pulsar Microwave, JSO-50-471/6S in product characterization.

    Thanks

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