328 Chapter 2
Performance Verification Tests
38. Displayed Average Noise Level: Agilent E4407B and E4408B
8. After performing all applicable DANL measurement procedures,
continue with Remove Reference Level Offset.
Measuring Displayed Average Noise Level
Use the following procedure for testing DANL over most frequency
ranges. The start and stop frequencies and test RBW (1 kHz, 100 Hz or
10 Hz) are specified in the DANL Measurement Sequence Table (Table
2-89 or Table 2-90).
1. If the test RBW is 100 Hz or 10 Hz and the analyzer has Option 1DN
(1.5 GHz Tracking Generator) installed, press Source, Amplitude
(Off).
2. Set the analyzer as follows:
Auto Couple
FREQUENCY, Start Freq, (enter specified start frequency)
FREQUENCY, Stop Freq, (enter specified stop frequency)
AMPLITUDE, –70 dBm
Attenuation, 0 dB
AMPLITUDE, More, Ref Lvl Offst, (enter Ref Lvl Offset (1 kHz) if test
Table 2-90 DANL Measurement Sequence, E4408B
Subset Procedure
Procedure Parameters Test
Record
Entry
Start
Freq Stop Freq Test
RBW
Preamp
State
A Measure DANL 10 MHz 1 GHz 1 kHz Off 1)
Measure DANL 1 GHz 2 GHz 1 kHz Off 2)
Measure DANL 2 GHz 3 GHz 1 kHz Off 3)
Measure DANL 3 GHz 6 GHz 1 kHz Off 4)
Measure DANL 6 GHz 12 GHz 1 kHz Off 5)
Measure DANL 12 GHz 22 GHz 1 kHz Off 6)
Measure DANL 22 GHz 26.5 GHz 1 kHz Off 7)
C Measure DANL 10 MHz 1 GHz 100 Hz Off 11)
Measure DANL 1 GHz 2 GHz 100 Hz Off 12)
Measure DANL 2 GHz 3 GHz 100 Hz Off 13)
Measure DANL 3 GHz 6 GHz 100 Hz Off 14)
Measure DANL 6 GHz 12 GHz 100 Hz Off 15)
Measure DANL 12 GHz 22 GHz 100 Hz Off 16)
Measure DANL 22 GHz 26.5 GHz 100 Hz Off 17)