Agilent Technologies E4408B User Manual

2-32 Chapter2
Getting Started
File Menu Functions
Step 2. Save the file
1. To access the
Save menu, press, File, Save.
2. Select the type of file you want to save. In this example you are
saving a trace; press Type, Trace.
3. Select the trace you wish to save (1, 2, 3, or all traces). In this
example you will save trace 3; press Source (softkey), Trace 3.
4. Select the format for which you wish to save the trace: trace plus
state (Trace + State) or comma separated value (CSV). In this
example you will save as trace plus state; press
Format, Trace + State.
5. Enter a filename by pressing
Name. The Alpha Editor appears. For
this example you will name the file, “TEST1”. (The numeric keypad
is also available for the filename.) Note that the file extension is
always set by the system and for this file type the extension is TRC.
You must now press the
Enter (hardkey) to get back to the Save
menu.
6. The destination for the saved file is shown in the Path: field. In this
example, you will select the path as C:\START\.
NOTE If the correct location is not listed in the Path: field, change directories
by pressing
Dir Up (softkey) or using the step keys or knob, highlight the
directory you wish. Pressing
Dir Select then confirms your choice which
is displayed in the Path: field.
7. Press
Save Now or Save (hardkey) to save the file to the C:\Start\
location. The message Saving Now is displayed during this
operation. For this example, the status line displays:
C:\START\TEST1.TRC file saved.
NOTE When saving to drive (A:), never remove the floppy disk during the save
operation. To do so could corrupt all data on the floppy disk.
NOTE You need to use a filename that does not already exist in the current
directory. The filename is limited to eight characters, alpha (A-Z) or
numeric (0-9) in any combination. The analyzer will not allow you to
overwrite an existing file. If you select a filename that already exists,
the status bar will display the message: File already exists. If you
do not choose a filename, the analyzer will automatically generate a
name based on the type of file you are saving (Setup: SETUP, State:
STATE, Trace: TRACE, Limits: LIMIT, Corrections: COREC, Screen: SCREN).
It also generates a three digit integer (starting at 000 and extending
through 999, remembering the previously saved value through a power
cycle) which it adds to the name, for example: TRACE056.TRC. Also note
that this three digit integer increments upon each attempted save until
a unique filename is created, without regard to the success of the save.

Agilent Technologies E4408B Specifications

General

Amplitude Accuracy	±0.5 dB
Input Impedance	50 Ohms
Sweep Time	1 ms to 1000 s
Resolution Bandwidth (RBW)	1 Hz to 3 MHz
Video Bandwidth (VBW)	1 Hz to 3 MHz
Detectors	Peak, Sample
Interfaces	GPIB, LAN
Dimensions	426 mm × 177 mm × 470 mm (16.8 in × 7.0 in × 18.5 in)
Amplitude Range	+30 dBm
Input VSWR	1.5:1
Third Order Intercept (TOI)	+15 dBm
Display	Color LCD

Summary

Preparing for Use

Power Requirements

Details AC and DC power requirements and specifications for analyzer operation.

AC Power Cable

Describes the three-wire power cable and grounding requirements for safe analyzer operation.

Turning On the Analyzer for the First Time

Getting Started

Making a Measurement

Guides the user through performing a basic measurement using the internal signal.

Analyzer Accuracy and the Internal Alignment Process

Explains the importance of internal alignment and warm-up time for analyzer accuracy.

Functional Testing

Displayed Average Noise Level

Details test limits and procedures for measuring average noise level across frequency ranges.

Frequency Readout Accuracy

Covers test limits, description, and required equipment for frequency readout accuracy testing.

Marker Count Accuracy

Provides procedure and test limits for verifying marker count accuracy.

Frequency Response

Details test limits, description, and required equipment for frequency response measurement.

Reference Level Accuracy

Covers test limits, description, and required equipment for reference level accuracy.

Resolution Bandwidth Switching Uncertainty

Details test limits and procedures for measuring resolution bandwidth switching uncertainty.

Scale Fidelity

Covers test limits, description, and required equipment for measuring scale fidelity.

Second Harmonic Spurious Responses

Details test limits and description for second harmonic spurious responses.

Tracking Generator Level Flatness: HP E4401B and E4411B, Options 1DN and 1DQ

Covers test limits, description, and required equipment for tracking generator level flatness.

Tracking Generator Level Flatness: E4402B, E4403B, E4404B, E4405B, E4407B and E4408B, Option 1DN

Details test limits, description, and required equipment for tracking generator level flatness.

Troubleshooting

Before You Call Agilent Technologies

Lists preliminary checks to perform before contacting support or returning the analyzer.

How to Contact Agilent Technologies

How to Return Your Analyzer for Service

Details procedures for returning the analyzer for servicing, including packaging.

Error Messages

Describes the four types of messages generated by the analyzer during operation.

Status Messages

Lists messages indicating conditions that may result in erroneous data.

Error Queues

Error Message Types

Categorizes errors into Query, Device-Specific, Execution, and Command errors.

Menu Maps

AMPLITUDE Y Scale

BW/Avg

Det/Demod

Display

File

FREQUENCY Channel

Input/Output

Marker

Meas Control

Meas Setup

MEASURE

Peak Search

Details menu keys for placing markers on peaks and accessing measurement tools.

Preset

Provides starting points for measurements by selecting factory or user presets.

Save

Sweep

Front-Panel Key Reference

AMPLITUDE Y Scale

Activates amplitude menu keys for reference level, attenuation, and scale settings.

BW/Avg

Controls resolution bandwidth, video bandwidth, and averaging functions.

Det/Demod

Accesses detector functions, demodulation, speaker control, and FM gain.

Display

Controls display elements like full screen, display line, and limits.

File

Provides access to keys for viewing, saving, loading, and managing data files.

Freq Count

FREQUENCY Channel

Controls center, start, stop frequencies and frequency offset.

Input/Output

Configures input impedance, coupling, mixer types, and signal identification.

Marker

Controls marker functions: type, number, on/off, readout, and functions like Band Power.

Marker →

Meas Control

Allows pausing, restarting, or toggling between continuous and single measurement sweeps.

Meas Setup

Configures measurement parameters for ACP, Channel Power, Occupied BW, etc.

MEASURE

Accesses measurement modes like channel power, occupied bandwidth, and harmonic distortion.

MODE

Peak Search

Places markers on peaks and accesses tools for measuring signal characteristics.

Preset

Provides a starting point by selecting factory or user-defined analyzer presets.

Print Setup

Save

Executes a save operation for analyzer setups, states, traces, and data.

Source

Accesses tracking generator functions for power and sweep adjustments.

SPAN X Scale

Sweep

Activates sweep time function and accesses menu keys for sweep time and control.

System (Local)

Accesses System menu keys for local mode, error display, and analyzer settings.

Trig

View/Trace

Options and Accessories

RS-232 and Parallel Interface (Option 1AX)

High Stability Frequency Reference (Option 1D5)

Time-Gated Spectrum Analysis (Option 1D6)

50 Ω Tracking Generator (Option 1DN)

75 Ω Input Impedance (Option 1DP)

Narrow Resolution Bandwidth (Option 1DR)

75 Ω Tracking Generator (Option 1DQ)

Pre-amplifier (Option 1DS)

GPIB and Parallel Interface (Option A4H)

Fast Digitized Time Domain Sweeps (Option AYX)

External Mixing (Option AYZ)

RF and Digital Communications Hardware (Option B74)

Performance Bundle (Option B75)

TV Trigger and Picture on Screen (Option B7B)

Digital Signal Processing and Fast ADC (Option B7D)

RF Communications Hardware (Option B7E)

FM Demodulation (Option BAA)

cdmaOne Measurement Personality (Option BAC)

Provides measurements for various digital communication standards.

GSM Measurement Personality (Option BAH)

Provides measurements for various international digital communications standards.