Keysight 1000B Series, Service Manual

Page: 27 / 46

Service
1
Keysight 1000B Series Oscilloscopes Service Guide 27
18 Calculate the reference gain as follows:
Record this value in the Calculated Gain @ 1 MHz column of the “Performance
Test Record” on page 35.
19 Change the signal generator frequency to the value for the model being tested
as shown in the table below.
20 Change the oscilloscope time base to the value for the model being tests as
shown in the table above.
21 Using the Vpp reading, calculate the Vrms value using the following expression
and record it in the “Performance Test Record” on page 35:
For example, if Vpp = 1.24 V:
22 Using the power meter reading, convert this measurement to Volts RMS using
the expression and record it in the “Performance Test Record” on page 35:
For example, if Pmeas = 3.65 mW:
Table 7 Oscilloscope Models and Signal Generator Frequency
Setting Model
DSO1152B DSO1102B DSO1072B DSO1052B
Frequency 150 MHz 100 MHz 70 MHz 50 MHz
Time Base 2 ns/div 5 ns/div 10 ns/div 10 ns/div
Gain
1 MHz
Vout
1 MHz
Vin
1 MHz
----------------------------
=
Vout
max
Vpp
max
2 2
-------------------
=
Vout
max
1.05
2 2
----------
1.05
2.828
-------------
371 mV = = =
Vin
max
P
meas
50
Ω ×
=
Vin
max
3.65 mW 50
Ω ×
427 mV = =