Fluke 9640A Series, Instruction Manual, Page: 216 / 324

9640A
Instruction Manual
5-26
30. Allow the measuring receiver to tune the input signal, and then set the controls to
measure RF level, relative (dB) to the current input level.
31. Without changing any measuring receiver settings, set the UUT to the next amplitude
listed in Table 5-14 for this frequency. Allow the measuring receiver reading to
stabilize and record the reading as P
rel
. (Note that P
rel
will be a negative number in
dB).
32. Calculate the UUT output P
out
= P
-37
+ P
rel
. Check that the value of P
out
is within
the tolerance shown in part A of Table 5-14.
33. Repeat steps 31 and 32 for each amplitude listed in part A of Table 5-14 for this
frequency.
34. Return the UUT output to -37dBm, set the UUT frequency to the next frequency
listed in part A of Table 5-14, and repeat steps 30 through 34.
35. Set the UUT to 100kHz at -47dBm. Repeat steps 30 through 35 for the points listed
in part B of Table 5-14 using the calculation P
out
= P
-47
+ P
rel
in step 32.
36. Set the UUT to
STBY
.
Table 5-14. Level Accuracy Test (50
Ω
), Low Level Test Points
Part Frequency Amplitude Reading P
out
Tolerance
-37 dBm Reference Reference
-66 dBm P
rel
±0.20 dB
100 kHz
-85 dBm (P
-85
) P
rel
±0.50 dB
-37 dBm P-
37
Reference
-66 dBm P
rel
±0.20 dB
10 MHz
-85 dBm (P
-85
) P
rel
±0.50 dB
-37 dBm Reference Reference
-66dBm P
rel
±0.20 dB
100 MHz
-85 dBm (P
-85
) P
rel
±0.50 dB
-37 dBm P-
37
Reference
-66dBm P
rel
±0.20 dB
300 MHz
-85 dBm (P
-85
) P
rel
±0.50 dB
-37 dBm Reference Reference
-66dBm P
rel
±0.50 dB
1.4 GHz
-85 dBm (P
-85
) P
rel
±1.00 dB
-37 dBm P-
37
Reference
-66dBm P
rel
±0.50 dB
3 GHz
-85 dBm (P
-85
) P
rel
±1.00 dB
-37 dBm Reference Reference
-66dBm P
rel
±0.50 dB
A
4 GHz
-85 dBm (P
-85
) P
rel
±1.00 dB