HP ESA-L1500A, User'S And Calibration Manual

Page: 214 / 326

Chapter 9 213
Performance Verification Tests
7. Reference Level Accuracy
Reference Atten Error ____________ dB
3. To calculate the attenuation error at other nominal attenuator
settings, subtract the attenuation error at the other settings from
the reference atten error and enter the result in column 3 of
Table 9-7 and Table 9-8 .
Example for 50 dB setting:
Actual Attenuation (40 dB) = 40.15 dB
Actual Attenuation (50 dB) = 50.08 dB
Log Scale
1. Set the synthesized signal generator controls as follows:
FREQUENCY
,
50 MHz
AMPLITUDE
,
+10 dBm
AM OFF
FM OFF
2. Connect the equipment as shown in Figure 9-6 . Set the 10 dB step
attenuator to 30 dB attenuation and the 1 dB step attenuator to
10 dB attenuation.
75
Ω
Input only: Set the 1 dB step attenuator to 10 dB.
Reference Atten Error Actual Attenuation (40 dB) 40 dB – =
Atten Error (X dB) (Actual Attenuation (X dB) Nominal Attenuation (X dB)) – Reference Atten Error – =
Reference Atten Error 40.15 dB 40 dB – 0.15 dB = =
Atten Error (50 dB) 50.08 dB 50 dB –
( )
0.15 dB – =
0.08 dB 0.15 dB – =
0.07 dB – =