158 Chapter 2
Performance Verification Tests
21. Resolution Bandwidth Accuracy
Figure 2-25 Resolution Bandwidth Accuracy Test Setup
CAUTION Use only 75 Ω cables, connectors, or adapters on instruments with 75 Ω
connectors, or the connectors will be damaged.
Procedure
1. Connect the equipment as shown in Figure 2-25.
2. On the synthesized signal generator, press Blue Key, Special, 0, 0 and
set the controls as follows:
FREQUENCY, 50 MHz
AMPLITUDE, 0dBm (50 Ω Input only)
AMPLITUDE, 6 dBm (75 Ω Input only)
3. Press Preset on the analyzer. Press the Factory Preset softkey, if it is
displayed. Press System, Alignments, Auto Align, Off. Set the analyzer
by pressing the following keys:
FREQUENCY, 50 MHz
SPAN, 7.5 MHz
AMPLITUDE, Scale/Div 1 dB
AMPLITUDE, Y Axis Units (or Amptd Units), dBm
BW/Avg, 5MHz
BW/Avg, Video BW, 30 Hz
4. Set the 1 dB step attenuator to 3 dB.
5. Note the error of the external 1 dB step attenuator at 3 dB and 6 dB
below using its calibration records.
Attenuator Error (3 dB) ___________ dB