Chapter 2 79
Performance Verification Tests
10. Residual FM
CAUTION Use only 75 Ω cables, connectors, or adapters on instruments with 75 Ω
connectors, or the connectors will be damaged.
Procedure
This performance test consists of two parts:
“Part 1: Residual FM”
“Part 2: Residual FM for Option 1DR and 1D5”
Perform “Part 2: Residual FM for Option 1DR and 1D5” in addition to
Part 1, only if your analyzer is equipped with Option 1DR and 1D5.
Part 1: Residual FM
Determining the IF Filter Slope
1. Connect the equipment as shown in Figure 2-10.
2. Set the synthesized signal generator controls as follows:
FREQUENCY, 1000 MHz
AMPLITUDE, –10 dBm (50 Ω Input only)
AMPLITUDE, –4 dBm (75 Ω Input only)
AM OFF
FM OFF
3. Press Preset on the analyzer. Press the Factory Preset softkey, if it is
displayed. Set the analyzer by pressing the following keys:
FREQUENCY, Center Freq, 1 GHz
SPAN, 1MHz
AMPLITUDE, Ref Level, –9 dBm (50 Ω Input only)
AMPLITUDE, 39.8 dBmV (75 Ω Input only)
Scale/Div, 2dB
BW/Avg, Res BW, 1 kHz
4. On the analyzer, press the following keys:
Peak Search (or Search)
SPAN, Span Zoom, 5kHz
Wait for the Span 5kHz message to appear, then press:
Peak Search (or Search), Marker →, Marker → Ref Lvl, Marker, Off
5. On the analyzer, press the following keys:
Single (Wait for the sweep to finish)
Peak Search (or Search)
Meas Tools, Delta
6. On the analyzer, rotate knob counterclockwise until the marker