HP 8647A - Page 110

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Theory

Operation

Introduction

Use the circuit descriptions and the simplified block diagram in this

chapter to understand the instrument’s operation.

200

kHz

_..)

OUT

Figure 5a-

Simplified

Block

Diagram

Theory

Operation

5a-1

Main Page

Table of Contents10
Operation17
Quick Overview17
Powerkey17
Increment Set Keys17
Function and Data Keys17
Display Contrast17
Knobs17
Memory18
Modulation Source18
Operation Examples19
Setting the RF Output Signal20
Setting the Frequency20
Setting the Amplitude20
Turn on the RF Output21
Setting the Modulation21
Incrementing or Decrementing the RF Output Signal22
Preliminary Steps22
Using the Knob22
Using the Increment Keys23
Using the Memory Registers24
Saving Instrument Settings in Register Sequences25
Saving Settings in Registers25
Checking the Sequence27
Checking a Different Sequence27
Deleting a Register from the Sequence29
Selecting the Sequence29
Deleting a Register29
Renumbering the Registers in a Sequence31
Decreasing the Register Number31
Checking the Sequence32
Inserting a Register in a Sequence33
Saving a New Register34
Offsetting the RF Output from a Reference35
Setting the Reference Value35
Offsetting the RF Output35
Turning the Reference Mode off or36
Setting a New Reference Value37
Holding the Output Attenuator Range38
Set the Amplitude Level38
Holding the Attenuator38
Adjusting the Amplitude39
Operation Reference40
Frequency and Amplitude41
Knob41
Digit-Select Arrow Keys41
Refset42
Units42
Ref On/Off42
Function43
Frequency43
Amplitude43
Increment Set44
Incrset44
Backspace45
Units Conversion45
Instrument Preset46
Adrs48
Local48
Memory49
Reg 9949
Seq 949
Register Recall Arrows51
Renumbering the Registers53
Modulation Source54
Modon/Off55
INT 400 Hz INT Khz55
Extacextdc55
Khz EXT DC56
Setting the Modulation Level56
Rf Output57
Rfon/Off57
Attnhold57
Vernier Ranges57
Rfoutput58
Rear Panel59
Display Contrast59
Auxiliary Interface60
Line Voltage Connector60
HP-IB Connector60
Remote Interface (Accessory)61
Modon/Off61
Rfon/Off61
Sequence Selection Arrows62
Memory Interface (Accessory)63
Power63
Copy Arrow Keys64
Making a Copy64
Busy64
Operation Messages65
Front Panel Operation Messages65
HP-IB Command Errors69
HP-IB Execution Errors 1C-771
HP-IB Device-Specific Errors71
HP-IB Query Errors71
Service Messages72
Hp-IB Programming73
Background73
Programming Guidelines74
HP-IB Definition74
HP-IB Address74
What Is Programmable74
Error Messages74
Programming Language74
Advanced Programming74
Programming Examples75
Programming RF Frequency75
Programming RF Frequency and FM Modulation75
Programming RF Amplitude76
HP-IB Status Reporting79
External Modulation Input Level Status80
Modulation Input (High or Low)81
Reverse Power Protection Status82
Example: Check the Condition of Unspecified Power83
HP 8647A SCPI Command Reference84
AM Subsystem85
CAL Subsystem85
FM Subsystem86
Output Subsystem87
PM Subsystem88
Power Subsystem89
STATUS Subsystem90
System Subsystem91
HP-IB Capabilities92
HP-IB Connector Information93
Replacing the Fuse96
Power Cable and Mains Plug97
Only)119
Replaceable Parts128
FM Accuracy Performance Test134
FM Distortion Performance Test135
AM Accuracy Performance Test137
AM Distortion Equipment Setup138
AM Distortion Performance Test138
Phase Modulation Distortion Equipment Setup140
Phase Modulation Accuracy Performance Test140
Phase Modulation Distortion Equipment Setup141
Phase Modulation Distortion Performance Test141
Residual FM Equipment Setup143
Residual FM Performance Test143
Harmonics Equipment Setup145
Harmonics Performance Test145
Spurious Equipment Setup146
Spurious Performance Test146
DC FM Frequency Error Performance Test147
CW Frequency Accuracy Equipment Setup149
RF Level Accuracy Performance Test165
CW Frequency Accuracy Performance Test170

HP 8647A - Page 110

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