Agilent Technologies 3000 Series - Page 115

Service
Analog Bandwidth - Maximum Frequency Check
4-19
Example For Vpp = 1.24 V
23 Using the power meter reading, convert this measurement to Volts RMS
using the expression and record it in the Performance Test Record
(page 4-22):
Example For Pmeas = 3.65 mW.
24 Calculate the gain at the maximum frequency using the expression and
record it in the Performance Test Record (page 4-22):
Example For example, if (Vout @ Max Frequency) = 371 mV, (Vin @ Max Frequency) =
427 mV and Gain @ 1 MHz = 0.993, then:
Record this value in the Calculated Gain @Max Freq column in the Analog
Bandwidth - Maximum Frequency Check section of the Performance Test
Record. To pass this test, this value must be greater than -3.0 dB.
Vout
max
1.05
22
----------
1.05
2.828
-------------
371 mV===
Vin
max
P
meas
50Ω×=
Vin
max
3.65 mW 50Ω× 427 mV==
Gain
max
20 log
10
Vout
max
()Vin
max
()⁄
Gain
1MHz
--------------------------------------------------------
=
Gain
Max Freq
20 log
10
371 mV 427 mV ⁄
0.993
--------------------------------------------
-1.16 dB==