Specifications
Amplitude accuracy at all center
frequencies
Reference leve
l +20 dBm to –30 dBm, alignment run prior to testing
Applies to corrected IQ data, with signal to noise ratios > 40 dB
Accuracy may degrade up to ±0.6 dB after storage at maximum storage temperature,
recovers with
in 24 hours
Center freque
ncy9kHzto
<3GHz
±1.2 dB (18 °C t
o28°C)
±0.8 dB (18 °C to 28 °C), typical (95% confi dence)
±1.0 dB (–10 °C to 55 °C), typical
Center frequency 3GHzto
6.2 GHz
±1.65 dB (18 °C to 28 °C)
±1.0 dB (18 °
C to 28 °C), typical (95% confidence)
±0.85 dB (–10 °C to 55 °C), typical
The above Amplitude accuracy at all center frequencies specifications apply when operated and stored at the same ambient
absolute h
umidity conditions as the average factory calibration environment (8 grams of water per cubic meter of air).
Absolute humidity can be estimated from ambient temperature ⁰C and relative humidity rh (%) using readily available online
calculators or the following relation:
Losses in the RF path of the product are proportional to its PCB mo isture content which is in turn proportional to the amount
of moisture in the air. PCB moisture responds slowly to ambient conditions and it may take a day or more for an ambient
humidit
y change to cause a significant amplitude shift, it may require a similar length of time to recover after return to the
original ambient condition. Amplitude errors due to humidity are minimal when the ambient conditions are the same as the
factory calibration conditions, nominally 8 g/m3 and increase proportional to the difference from that value averaged over
time. T
he additional amplitude error i s given by
(C.F. = center frequency in GHz, HA = Absolute Humidity in g/m^3). Worst case amplitude error is the greater of the error in
the table or the sum of the value in the table combined with the humidity error.
Example:
Center Freq. = 4 GHz, temperature = 28C, R.H. = 80%.
Absolute Humidity= 21.8 g/ m3
Humidity Error (4 GHz, 21.8 g/ m3) = -0.62 dB
P-TYP-S95 error from table = +1, -1 dB
Sum of table plus hum. error= (1-0.62)=0.38 dB, (-1-0.62)= -1.62 dB
Worst case amplitude error = +1 dB, -1.62 dB
RSA306B Specifications and Performance Verification 3
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