The 11947B is a 10 dB attenuator and transient limiter that operates from 9 kHz - 200 MHz. It is based on design of the HP 11947A, updated to use surface mount parts and SMA connectors. The 11947 is …
The 11947B is a 10 dB attenuator and transient limiter that operates from 9 kHz - 200 MHz. It is based on design of the HP 11947A, updated to use surface mount parts and SMA connectors. The 11947 is typically used to protect the 50 Ω input of a spectrum analyzer from transients received from a LISN (line impedance stabilization network).
Each board has been tested to meet or exceed the original 11947A specs:
Insertion loss: 10 dB, 9 kHz - 200 MHz
6 kHz high-pass filter
VSWR on both ports < 1.2, < 200 MHz
Limiting threshold: +15 dBm
Performance plots obtained on a VNA and oscilloscope are available from the documentation link below.
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