Ho testato ogni attenuazione 0 dB(di riferimento), 10 dB, 20 dB e 30 dB con il mio calibrato VNA HP 8753D (30kHz a 6GHz) e tutto era in tolleranza da 30 kHz a 4 GHz (ho fatto misura fino a 6 GHz) tranne l'attenuazione 20dB che era fuori tolleranza prevista da 3.1GHz fino a 4GHz o più. => Frequenza 3.1 GHz, S21 Guadagno -18.8 dB, Delta dB di 1.2 dB quando si prevedeva che fosse /-1.1 dB => Frequenza 4 GHz, Guadagno S21 -18.2 dB, Delta dB di 1.8 dB quando si prevedeva che fosse /-1.1 dB => Al di fuori dei 4 GHz vi sono grosse discrepanze fino a Delta dB di 6,7 dB in più rispetto alla tolleranza prevista per esempio a 5,4 GHz S21 Gain -13,3 dB => delta dB 6,7 Per ulteriori dettagli con il rapporto completo vedere: https://hydrabus.com/DC_to_4GHz_RF_Fixed_Attenuator_VNA_Tests_BVERNOUX_05May2020.pdf Per tutti i file VNA S2P vedere: https://hydrabus.com/DC_to_4GHz_RF_Fixed_Attenuator_VNA_Tests_BVERNOUX_05May2020_S2P.7z

I have tested each attenuation 0 dB (reference), 10 dB, 20 dB and 30 dB with my calibrated VNA HP 8753D (30kHz to 6GHz) and all was in tolerance from 30 kHz to 4 GHz (I have done measurement up to 6 GHz) except the 20dB attenuation which was out of expected tolerance from 3.1GHz up to 4GHz or more. => Frequency 3.1 GHz, S21 Gain -18.8 dB, Delta dB of +1.2 dB when it was expected to be +/-1.1 dB => Frequency 4 GHz, S21 Gain -18.2 dB, Delta dB of +1.8 dB when it was expected to be +/-1.1 dB => Outside 4 GHz there is big discrepancies up to Delta dB of +6.7 dBmore than expected tolerance for example at 5.4 GHz S21 Gain -13.3 dB => delta dB +6.7 For more details with full report see: https://hydrabus.com/DC_to_4GHz_RF_Fixed_Attenuator_VNA_Tests_BVERNOUX_05May2020.pdf For all VNA S2P files see: https://hydrabus.com/DC_to_4GHz_RF_Fixed_Attenuator_VNA_Tests_BVERNOUX_05May2020_S2P.7z

Ho testato ogni attenuazione 0 dB(di riferimento), 10 dB, 20 dB e 30 dB con il mio calibrato VNA HP 8753D (30kHz a 6GHz) e tutto era in tolleranza da 30 kHz a 4 GHz (ho fatto misura fino a 6 GHz) tranne l'attenuazione 20dB che era fuori tolleranza prevista da 3.1GHz fino a 4GHz o più. => Frequenza 3.1 GHz, S21 Guadagno -18.8 dB, Delta dB di 1.2 dB quando si prevedeva che fosse /-1.1 dB => Frequenza 4 GHz, Guadagno S21 -18.2 dB, Delta dB di 1.8 dB quando si prevedeva che fosse /-1.1 dB => Al di fuori dei 4 GHz vi sono grosse discrepanze fino a Delta dB di 6,7 dB in più rispetto alla tolleranza prevista per esempio a 5,4 GHz S21 Gain -13,3 dB => delta dB 6,7 Per ulteriori dettagli con il rapporto completo vedere: https://hydrabus.com/DC_to_4GHz_RF_Fixed_Attenuator_VNA_Tests_BVERNOUX_05May2020.pdf Per tutti i file VNA S2P vedere: https://hydrabus.com/DC_to_4GHz_RF_Fixed_Attenuator_VNA_Tests_BVERNOUX_05May2020_S2P.7z

Top quality attenuator !! Recommended !!

Top quality attenuator !! Recommended !!

Top quality attenuator !! Recommended !!

10dB: SWR 1:1.5 to 4G. Atten Flat, 9.56dB at 4G. At 10 GHz 11 dB. Surprisingly good ! 20dB: SWR 1:1.34 to 4G. Atten Flat 18.8 at 3.5GHz. 17dB at 6G, 15dB at 8G. 30dB: SWR 1:1.45 to 4G. Atten Flat 28.5 at 4.8G 28 at 5.4G 25dB at 7G. Pin depth fully OK ± 0.0015" on all 8 contacts. Good value for the price. All measured with professional expensive instruments. Some solder residue on the board, but easily cleaned off.

10dB: SWR 1:1.5 to 4G. Atten Flat, 9.56dB at 4G. At 10 GHz 11 dB. Surprisingly good ! 20dB: SWR 1:1.34 to 4G. Atten Flat 18.8 at 3.5GHz. 17dB at 6G, 15dB at 8G. 30dB: SWR 1:1.45 to 4G. Atten Flat 28.5 at 4.8G 28 at 5.4G 25dB at 7G. Pin depth fully OK ± 0.0015" on all 8 contacts. Good value for the price. All measured with professional expensive instruments. Some solder residue on the board, but easily cleaned off.

10dB: SWR 1:1.5 to 4G. Atten Flat, 9.56dB at 4G. At 10 GHz 11 dB. Surprisingly good ! 20dB: SWR 1:1.34 to 4G. Atten Flat 18.8 at 3.5GHz. 17dB at 6G, 15dB at 8G. 30dB: SWR 1:1.45 to 4G. Atten Flat 28.5 at 4.8G 28 at 5.4G 25dB at 7G. Pin depth fully OK ± 0.0015" on all 8 contacts. Good value for the price. All measured with professional expensive instruments. Some solder residue on the board, but easily cleaned off.

I needed to attenuate a high power signal. It worked very well.

I needed to attenuate a high power signal. It worked very well.

I needed to attenuate a high power signal. It worked very well.

Gute Qualität zu einem gutem Preis! Ich habe die SMA Buchsen zusätzlich mit der Unterseite der Platine verlötet, um noch besseren Halt zu garantieren, ist aber nicht unbedingt nötig. Die Impedanzen sind in einem engen Bereich (+/- 1 Ohm) um 50 Ohm.

Gute Qualität zu einem gutem Preis! Ich habe die SMA Buchsen zusätzlich mit der Unterseite der Platine verlötet, um noch besseren Halt zu garantieren, ist aber nicht unbedingt nötig. Die Impedanzen sind in einem engen Bereich (+/- 1 Ohm) um 50 Ohm.

Gute Qualität zu einem gutem Preis! Ich habe die SMA Buchsen zusätzlich mit der Unterseite der Platine verlötet, um noch besseren Halt zu garantieren, ist aber nicht unbedingt nötig. Die Impedanzen sind in einem engen Bereich (+/- 1 Ohm) um 50 Ohm.

Non ho ancora provato, ma sembra bello e ben costruito.

Haven't tried yet but it looks nice and well built.

Non ho ancora provato, ma sembra bello e ben costruito.

abbastanza buoni ...

abbastanza buoni ...

abbastanza buoni ...

Buona qualità ad un buon prezzo

Good quality at a good price

Buona qualità ad un buon prezzo

Sembra buono.

Looks good.

Sembra buono.

Bella unità 0db non molto utile, 1db molto meglio.

Nice unit 0db not very useful, 1db much better.

Bella unità 0db non molto utile, 1db molto meglio.