306 Chapter 2
Performance Verification Tests
35. Displayed Average Noise Level: Agilent E4401B and E4411B
Measuring Displayed Average Noise Level (DANL)
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
2-81 Table 2-82, Table 2-83 or Table 2-84).
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, Ref Level, –70 dBm (50 Ω Input only)
Attenuation, 0 dB
AMPLITUDE, More, Y Axis Units (or Amptd Units)
dBmV, More, Ref Level, –21.24 dBmV (75 Ω Input only)
AMPLITUDE, More, Ref Lvl Offst, (enter Ref Lvl Offset (1 kHz) if test
RBW = 1 kHz)
AMPLITUDE, More, Ref Lvl Offst, (enter Ref Lvl Offset (100 Hz/10
Measure DANL 1 GHz 1.5 GHz 10 Hz On 36)
Table 2-84 DANL Measurement Sequence, E4411B 75 Ω Inputs
Subset Procedure
Procedure Parameters Test
Record
Entry
Start
Freq
Stop
Freq
Test
RBW
Preamp
State
A Measure DANL 1 MHz 10 MHz 1 kHz Off 21)
Measure DANL 10 MHz 500 MHz 1 kHz Off 22)
Measure DANL 500 MHz 1 GHz 1 kHz Off 23)
Measure DANL 1 GHz 1.5 GHz 1 kHz Off 24)
C Measure DANL 1 MHz 10 MHz 100 Hz Off 29)
Measure DANL 10 MHz 500 MHz 100 Hz Off 30)
Measure DANL 500 MHz 1 GHz 100 Hz Off 31)
Measure DANL 1 GHz 1.5 GHz 100 Hz Off 32)
Table 2-83 DANL Measurement Sequence, E4401B 75 Ω Inputs
Subset Procedure
Procedure Parameters Test
Record
Entry
Start
Freq
Stop
Freq
Test
RBW
Preamp
State