PERFORMANCETESTS

MODEL8559A

PERFORMANCE TESTS

4.22.INPUT ATTENUATOR ACCURACY (Cont'd)

TABLE 4-9.INPUT AllENUATOR ACCURACY

INPUT ATTEN

Step

 

 

Amplitude

Step Attenuator

 

Corrected

 

Setting

Attenuator

 

 

Deviation

 

Error

 

Deviation

 

(dB)

Setting (dB)

 

 

(dB)

(Calibration)"

 

(dB)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

I

*Attenuations > dial settings are positive (+). Attenuations <dial settings are negative (-).For example, 9.99 dB

I

calibration for a 10 dB attenuator setting represents an error of -0.01 dB.

To compute corrected deviation for each setting, add step attenuator error to amplitude deviation. Corrected deviation should not exceed 5 1.0 dB between any two adjacent INPUT ATTEN setting.

dB Maximum Error per 10-dB Step

Record maximum positive and maximum negative corrected deviation values. Difference between these two values (maximum cumulative step error) should not exceed 2.4 dB.

dB Maximum Positive Corrected DeviationdB Maximum Negative Corrected DeviationdB Maximum Cumulative Step Error