Agilent Technologies E8285A Manual page 161

6. On the signal generator set the level to +8 dBm or whatever level is suitable for
the microwave converter's LO input.
7. For frequencies of 1700 and 2000 MHz perform the following:
a. On the signal generator set the frequency to 1900 MHz CW and 2200 MHz
CW respectively.
b. Reset the measuring receiver.
c. On the measuring receiver set the frequency offset mode to enter and enable
the LO frequency (27.3 Special) then key in the signal generator (LO)
frequency (in MHz) which is 1900 or 2200 MHz respectively.
d. On the measuring receiver set the measurement mode to tuned RF level and
the measurement units to dBm then press SET REF.
e. Measure and record the RF level at the levels down to and including -83
dBm shown in the PTR at the Test Set's
receiver displays the need to recalibrate, press the CALIBRATE key and
wait for calibration to be completed.
f. After recording the reading at -83 dBm insert an RF amplifier into the
output of the Test Set.
g. Record the new measured level at -83 dBm.
h. Continue measuring the level down to −116 dBm.
i. Move the input to the
j. Measure and record the RF level at the levels down to and including −83
dBm shown in the PTR at the Test Set's
k. After recording the reading at −83 dBm insert an RF amplifier into the
output of the Test Set.
l. Record the new measured level at −83 dBm.
m. Continue measuring the level down to −116 dBm.
n. Correct the measured reading for each level measured without the amplifier
as follows: Add the RF power measured in step 3c or 5b to the measured
level. (For example, if the level in step 3c is -10.2 dBm and the level at −55
dBm is −45.1 dB, record a level of −10.2 + (-45.1) = 55.3 dBm.) Compare
the corrected values with the limits in the PTR.
o. Correct the measured reading for each level measured with the amplifier by
summing the following values:
+ RF power measured at −11 dBm in step 3c or 5b
+ RF level measured at −83 dBm in step 7i
– RF level measured at −83 dBm in step 7j
+ RF level measured in step 7k
RF Generator Level Accuracy Performance Test 5
DUPLEX OUT
port without the amplifier inserted.
RF IN/OUT
RF IN/OUT
Performance Tests
port. If the measuring
port.
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