Agilent Technologies 75000 Series C - Manual (Page 52)

Test 2-5: AC Flatness - 250 kHz Filter (cont’d)
Test Procedure
(cont’d)
3. Set the AFG output to the reference frequency (1 kHz):
FREQ 1000 Set frequency
4. Measure the amplitude with the DMM and convert the reading to
dBm. Note the result for use in step 6:
Reference Level ( dBm ) = 20 × log ï Reading ( volts )ï+ 13.0103
Perform steps 5 - 6 for each frequency listed in Table 2-5:
5. Set the AFG output:
FREQ <frequency> Set frequency
where <frequency> is the value specified in Table 2-5.
6. Measure the amplitude with the DMM and convert the reading to
dBm. Calculate and record the error relative to the reference level
calculated in step 4:
Reading
(
dBm
) =
20
×
log
ï
Reading
(
volts
)ï+
13.0103
Error
(
dB
) =
Reading
(
dBm
) −
Reference Level
(
dBm
)
50 Verification Tests Agilent E1445A Service Manual