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Measuring Instruments
4934A
HP 4934A User Manual
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Impulse
Noise
Count
CAUTION
Ensure
that
the
AC
Calibrator
OUTPUT
is
switched
off
or
set
to
the
minimum
level
before
proceeding
with
the
following
procedure.
1
Connect
the
AC
Calibrator
output
to
the
HP
4934A
RCV
port.
2
Set
the
HP
4934A
as
follows:
Measurement
:
IMPULSE
NOISE
Transmitter
(TRMT)
Impedance
:
600Q
Receiver
(RCV)
Impedance
:
600Q
Display
Mode
:
RCV
Filter
:15
kHz
FLAT
Period
:
NON-STOP
Impulse
Noise
Display
:
LOW
(SET)
3
Set
the
AC
Calibrator
output
level
to
0.7746
V
at
2,000
Hz
then
switch
on
the
OUTPUT.
4
Set
the
LOW
(SET)
threshold
to
75
dBm.
5
Press
START
RESET
to
start
the
measurement.
6
Wait
60
seconds
then
press
STOP.
7
Check
the
reading
on
the
HP
4934A
display
is
480
±
48
counts.
8
Select
the
MID
threshold.
Check
the
reading
on
the
display
is
480
±
48
counts.
9
Select
the
HIGH
threshold.
Check
the
reading
on
the
display
is
480
±
48
counts.
Performance
Tests
5-9
72
74
Table of Contents
Table of Contents
5
Getting Started
11
Introduction
11
Switch-On
11
Front Panel Features
12
Demonstrating the HP 4934A
15
Demonstration 2
16
Error Codes
17
Making Measurements
19
Preliminary Setup
19
Connecting the HP 4934A to the Test Circuit
19
Dial and Hold
20
Dialing Using the HP 4934A and a Bott-In
21
Receiving an Incoming Call and Holding the Line
22
Level and Frequency
23
Principles
23
Instrument Operation
25
Message Circuit Noise
28
Principles
28
How It Is Measured
29
Instrument Operation
30
Noise with Tone (Notched Noise)
31
Principles
31
How It Is Measured
31
Instrument Operation
32
Signal to Noise
33
Principles
33
How It Is Measured
33
Instrument Operation
34
Impulse Noise
35
Principles
35
Instrument Operation
36
P/AR (Peak to Average Ratio)
39
Principles
39
How It Is Measured
40
Instrument Operation
40
Noise to Ground
41
Principles
41
How It Is Measured
41
Instrument Operation
42
General Information
43
Introduction
43
About this Version
43
Specification
44
Safety Information
44
General
44
Safety Symbols
45
Statement of Compliance
47
Electromagnetic Compatibility (EMC) Information
47
Instruments Covered by Manual
49
Options Available
50
Accessories Supplied
51
Accessories Available
51
Specifications
52
Installation
59
Introduction
59
Initial Inspection
59
Preparation for Use
60
Power Requirements
60
Line Fuse
60
Power Cable
61
Battery (Option 001 or Retrofit)
61
Battery
61
Mating Connectors (Front Panel)
62
Operating Environment
62
Cleaning
62
Noise Declaration
63
Storage and Shipment
63
Environment
63
Packaging
63
Performance Tests
65
Introduction
65
Calibration Cycle
65
Recommended Test Equipment
66
Operational Verification
67
Receiver Frequency
68
Receiver Level
69
Weighting Filters
70
Impulse Noise Count
73
Hold Circuit
75
Dynamic Hold Circuit
77
Transmitter Frequency Accuracy
83
Transmitter Level Range
84
Transmitter Level Accuracy
85
Transmitter Flatness at +10 Dbm
86
Transmitter Flatness at -40 Dbm
88
Receiver Frequency Range/Accuracy
94
Receiver Level Accuracy
96
Message Circuit Noise Accuracy
98
Notch Filter Rejection
100
Signal to Noise Ratio Accuracy
101
Impulse Noise Threshold Accuracy
103
Noise to Ground Accuracy
105
Peak to Average Ratio (P/AR) Accuracy
107
Software Downloading
113
Introduction
113
Quick Download Procedure
114
About the DOWNLOAD Program
115
Remote Control
117
Introduction
117
The Serial Port 7~2
118
Serial Port Type
118
Baud Rates
118
Cable Pinout
119
Null Modem
119
Setting up for Remote Control
120
Connecting the TIMS to a Controller
120
Setting the Baud Rate
120
Activating Remote Mode
120
Deactivating Remote Mode
120
Control Commands
121
Query Commands
124
Results Display (DISP?) Format
124
Range Error Messages
125
A Service Accessory 1 (Sal)
127
20 Db Amplifier/4 Khz Filter
127
Performance Test
127
B Service Accessory 2 (SA2)
133
Power Splitter/Adder
133
Performance Test
133
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HP 4934A Specifications
General
Brand
HP
Model
4934A
Category
Measuring Instruments
Language
English
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