pe43711
- class rfblocks.pe43711(le: str | None = None)[source]
Encapsulates control of the PE43711 step attenuator.
Documentation for the PE43711 step attenuator rfblocks module can be found here: A PE43711 Step Attenuator
- Parameters:
le (str) – The PE43711 latch enable (LE) controller pin
- atten_word(attn_db: float) str[source]
Calculate the attenuation word for a specified attenuation level.
- Parameters:
attn_db (float) – The desired attenuation level in dB. This should be in the range 0 to 31.75 dB.
- Returns:
An 8-bit integer containing the attenuation ‘word’.
- Raises:
AttenuationRangeException If the specified attenuation is out of range.
- chip_reset() str[source]
Reset the chip internal logic to default states.
- Returns:
A string containing the controller commands required to reset the chip.
- config_atten_word(attn_word: int) str[source]
Update the current attenuation word.
- Parameters:
attn_word (8-bit integer) – The attenuator word for the desired attenuation. Note that only the lower 7 bits of the value are used.
- Returns:
The command string required to update the current device attentuation value.
- classmethod default_insertion_loss(freq: float) float[source]
Calculates attenuator default insertion loss.
By default the attenuator insertion loss is modelled as a linear function. The slope and intercept of the function are derived from VNA measurements of the attenuator S21 with an attenuation setting of 0 dB.
- Parameters:
freq (float) – Frequency (in MHz) for computing the insertion loss.
- Returns:
The attenuator insertion loss (in dB) for an attenuation setting of 0 dB at the specified frequency.
- insertion_loss(freq: float) float[source]
Calculate the attenuator insertion loss. Insertion loss is computed using a 0 dB attenator setting.
- Parameters:
freq (float) – Frequency, in MHz, at which to compute the insertion loss.
- Returns:
The insertion loss (in dB) at the specified frequency.