HP E4402B, E4403B, E4404B, E4405B, E4407B, E4408B, E4411B NOTE, NOTE, Valid Marker Count Range, Improving Frequency Accuracy

Making a Basic Measurement

Viewing a Signal

Improving Frequency Accuracy

9.While not all of the zeros following the decimal in the active function block are significant, the numbers after the decimal in the marker annotation (upper-right corner of screen) are significant. To increase the accuracy of the frequency reading in the marker annotation, turn on the frequency count function.

a.Press Mkr Fctn.

•The Marker Fctn softkeys appear.

b.Press Marker Count.

•The Marker Count softkeys appear.

10.While not all of the zeros following the decimal in the active function block are significant, the numbers after the decimal in the marker annotation (upper-right corner of screen) are significant. To improve the accuracy of the frequency reading in the marker annotation, turn on the frequency count function by pressing Freq Count.

11.Note softkey Marker Count On Off. If Off is underlined, press the softkey to toggle marker count on.

As shown in Figure 3-5:

•The marker annotation changes from Mkr1 to Cntr1.

•The displayed resolution in the marker annotation improves.

NOTE	When you use the frequency count function, if the ratio of the resolution
	bandwidth to the span is less than 0.002, the following message
	appears on the display: Marker Count: Widen Res BW
	This indicates that the resolution bandwidth is too narrow.

12.Press Marker ➞ , Mkr ➞ CF to move the 10 MHz peak to the center of the display.

Valid Marker Count Range

13.Move the marker down the skirt of the 10 MHz peak. Note that although the readout in the active function changes, as long as the marker is at least 26 dB above the noise, the counted value (upper-right corner of display) does not change (see Figure 3-6). For an accurate count, the marker does not have to be at the exact peak.

NOTE	Marker count functions properly only on CW signals or discrete peaks.
	For a valid reading, the marker must be ≥ 26 dB above the noise.

14.Press BW/Avg, Res BW, then enter a new value. This action makes the resolution bandwidth the active function and allows you to experiment with different resolution bandwidth (RBW) values.

15.Press Marker, Off to turn the marker off.

Chapter 3

49

Contents

Getting Started Guide Notice Additional Information 1. Installation and Setup 2. Front and Rear Panel Features 3. Making a Basic Measurement 4. Viewing Catalogs and Saving Files 5. Options and Accessories 6. In Case of Difficulty 1Installation and Setup Page Initial Inspection Page If There Is a Problem Power Requirements Checking the Fuse AC Power Cord Page Table 1-3.AC Power Cords Page Turning on the Analyzer for the First Time Why Aren’t All the Personality Options Loaded in Memory Using an External Reference Firmware Revision TIP Running Internal Alignments Printer Setup and Operation Interconnection and Setup Testing Printer Operation Protecting Against Electrostatic Discharge Legal Information Page 2Front and Rear Panel Features 2.1.1 Front-PanelConnectors and Keys Media Door Earphone Data Control Keys Knob Numeric Keypad Step Keys Option 1DP for Option 1DQ 2.1.2 Display Annotations Screen Annotation (Continued) Page Rear-PanelFeatures 2.2 Rear-PanelFeatures Service Connector Inputs/Outputs Agilent ESA-LSeries (E4403B, E4408B, E4411B) Slot # Agilent ESA-ESeries (E4401B, E4402B, E4404B, E4405B E4407B) IF, Video, and Sweep Ports FM Demod Frequency Extension Assembly Card Slot Identification Numbers Power On Selection Power Always On Power Norm Page Key Overview 2.3 Key Overview Page Front and Rear Panel Symbols 2.4 Front and Rear Panel Symbols 3Making a Basic Measurement Basic Assumption Using the Front Panel Entering Data Using Menu Keys Presetting the Spectrum Analyzer Creating a User Preset Viewing a Signal Figure 3-110 MHz Internal Reference Signal and Associated Spectrum Setting Frequency Span Figure 3-2Span Changed to 50 MHz Reading Frequency & Amplitude Esc Changing Reference Level Page Improving Frequency Accuracy Valid Marker Count Range Figure Increasing Marker Frequency Accuracy Figure 3-6Using Marker Counter 4Viewing Catalogs and Saving Files Page File Menu Functions Locating and viewing files in the catalog Figure 4-1.Catalog Menu Creating a directory Formatting a Floppy Disk Saving a File Step 1. Set up the analyzer trace Figure 4-3.Viewing Trace Figure 4-4.Viewing Traces 1 and Step 2. Save the file Saving Now Loading a file Figure 4-7.Verifying Trace Renaming a File Copying a File Deleting a File Using the Alpha Editor 5Options and Accessories Ordering Options and Accessories Options Page Option Descriptions Page Page Page Page Page Page Page Page Page Page Page Accessories 50 Ohm/75 Ohm Minimum Loss Pad 75 Ohm Matching Transformer AC Probe AC Probe (Low Frequency) Carrying Strap (Part Number E4401-60028) External Keyboard GPIB Cable HP/Agilent 11970 Series Harmonic Mixers HP/Agilent 11974 Series Preselected Millimeter Mixers Agilent E1779A Battery Pack Parallel Interface Cable Printer RF and Transient Limiters RF Bridges RS-232Cable Static Safe Accessories 6In Case of Difficulty No operator serviceable parts inside. Refer servicing to qualified personnel. To prevent electrical shock, do not remove covers Types of Spectrum Analyzer Messages Before Calling Agilent Technologies Check the Basics Page Read the Warranty Service Options Calling Agilent Technologies Table 6-2.Contacting Agilent Technologies Returning an Analyzer for Service FRAGILE, HANDLE WITH CARE Page Index Index-97 Index-98 Index-99