HP 4935A Manuals

Manuals and User Guides for HP 4935A. We have 2 HP 4935A manuals available for free PDF download: Operating And Service Manual

HP 4935A Operating And Service Manual (351 pages)

Transmission Impairment Measuring Set

Brand: HP | Category: Measuring Instruments | Size: 15.25 MB

HP References in this Manual
1
About this Manual
1
Safety
3
Grounding
3
Line Voltage
3
IEC Symbols
4
Table of Contents
6
List of Illustrations
9
General Information
13
Transmission Impairment Measuring Set
13
Introduction
14
General Description
14
Instrument Identification
14
Specifications
14
General Information
14
Locator
14
Level a N D Frequency
16
Noise
16
Safety Considerations
17
Options and Accessories
17
Recommended Test Equipment
17
Related Manuals
17
User Repair
17
Warranty
17
List of Parts Used for Performance Tests
18
Recommended Test Equipment
18
Battery Operation
19
Charging the Batteries
19
Charge Acceptance at Various Temperatures
19
L-29. Operating Temperature
19
Installation
20
Initial Inspection
20
Preparation for Use
20
Line Voltage Selection
20
Power Requirements
20
Power Cable
21
Storage and Shipment
21
Instrument Packaging
21
Operating Environment
21
HP Plus Styles
22
Operation
24
Self Check
24
Error Messages
24
Introduction
24
Front and Rear Panel Controls/Connectors/Indicators
25
Controls, Connectors and Indicators
26
Operating Instructions
29
Power on and Set up
29
Measurements
29
Measurements
30
Level and Frequency-Transmitter
30
Level and Frequency-Receiver
31
Noise-Transmitter
32
Noise-Receiver
32
Noise with Tone - Transmitter/Receiver
33
Signal to Noise
34
Impulse Noise
35
Noise to Ground
37
P/Ar
38
Dial and Hold Procedures
39
Measurement Principles
40
Input-Output Switching
40
Level and Frequency Measurements
41
1000 Hz Loss
41
Frequency Shift
41
Attenuation Distortion
41
Message Circuit Noise Measurements
42
SF Skip
42
3 Khz Flat Weighting Characteristic
43
Program Weighted Filter
44
15 Khz Flat Filter
44
Noise-With-Tone (Notched Noise)
45
50 Kbit Filter
45
Signal-To Noise Measurement
45
C-Message Weighting with Notch Characteristic
46
Signal-To-Noise Measurement
46
Single Frequency Interference
47
Impulse Noise Waveform Representation
47
Displays
47
Setup
47
Noise-To-Ground Measurement
48
Peak-To-Average Ratio Measurement
48
Noise-To-Ground Related to Message Circuit Noise
48
P/AR Transmit Signal Frequency Spectrum
49
P/AR Transmit Signal Envelope
49
The P/AR
50
Performance Tests
52
Equipment Required
52
Test Record
52
Performance Verification
52
Self Check
52
Transmitter Flatness at + 10Dbm
53
Transmitter Flatness a T + 10 Dbm
54
Transmitter Flatness at -40 Dbm
55
Transmitter Flatness a T -40 Dbm
56
Abbreviated Transmitter Flatness Test
58
Receiver Accuracy at + 11 Dbm and -40 Dbm
59
Receiver Accuracy Test Table
60
Abbreviated Receiver Accuracy Test Table
60
Autorange Test
61
Filter Tests
62
C-Message Filter Test
62
Khz Flat Filter Test
63
Program Filter Test
63
50Kbit Filter Test
64
Notch Filter Test
64
Abbreviated Filter Test
64
Impulse Noise DAC Test
65
Abbreviated Impulse
66
Impulse Noise DAC Test
66
Count Limit Test
67
Termination Impedance Test
68
Hold Tone Dropout Detector Test
70
Hold Circuit Test
71
Distortion Test
72
-40 Dbm Distortion Test
73
Filter Circuit Parts List
74
Abbreviated Distortion Test
75
P/AR Test
76
P/AR Filter Responses
76
Noise-To-Ground Test
77
Longitutal Balance Setup
78
Autorange
78
Adjustment/Calibration
80
Adjustment Locations
80
Instrument Access
80
Introduction
80
Safety Considerations
80
Equipment Required
80
Procedure
80
Adjustments
81
+5V, +14V, and -14V Power Supply Adjustments
82
Output Level and Transmit Monitor Loop Adjustments
83
Receiver Adjustments
84
Notch Filter Adjustments
86
Al3 P/AR Filter and Latch Adjustments
87
Adjustments(0Pt.s 001 & 003)
87
Hold Circuit Adjustments
88
Ordering Information
89
Replaceable Parts List
89
Reference Designations and Abbreviations
90
Exploded View Case and Covers
92
Exploded View Assemblies and Cables
93
Exploded View Battery Option
95
Manufacturer Code List
96
Replaceable Parts
97
Manual Changes
127
Manual Change Instructions
127
A2 Switch Board Component Locator
136
A13/ P/AR Receiver Board Component Locator
137
Partial A5 Charger Board Schematic
140
A14 Transmitter Board Component Locator
141
A4/A14 Partial Schematic
142
A14 P/AR Transmitter Board Component Locator
142
A4 Transmitter Board Component Locator
143
Partial Power Supply Schematic
144
A13 P/AR Receiver Board Component Locator
145
A3 Receiver Board Component Locator
146
A3/13 Receiver Board Schematic
147
A13 Receiver Board Component Locator
155
A13 Receiver Board Schematic Diagram
157
A4 Transmitter Board Schematic Diagram
162
A14 Transmitter Board Schematic Diagram
163
A2 Switchboard Component Locator
164
A2 Switchboard Schematic Diagram
165
Receiver Board Schematic Diagram
173
A5 Charger Board Component Locator
187
A5 Charger Board Schematic Diagram
188
Service
219
4935A Main Block Diagram
219
How Measurements Are Made
221
Measurements Summary
221
Level and Frequency
222
Noise
222
Noise with Tone
222
Noise Amplification
223
Noise-To-Ground
224
Peak-To-Average Ratio
224
Frequency Measurement
224
Level Measurement
225
Voltage-To-Frequency Conversion Characteristics
225
How to Compute Frequency and Level Measurement
226
Level Calculation Example
226
Voltage-To-Frequency Conversion Output
226
Frequency and Level Measurement Timing
227
Control Theory of Operation
229
Microprocessor to Instrument
229
System Latches
229
Control Circuitry Block Diagram
229
Instrument to Microprocessor
230
Operator to Microprocessor
230
Keyboard Interrupt
230
Receiver Impedance Switches
230
Microprocessor to Operator
231
Instrument to Operator
231
Operator to Instrument
231
Miscellaneous Circuitry
231
Receiver Block Diagram
232
Receiver Theory of Operation
233
Switchboard Block Diagram
233
I/O Switching/Hold Circuits/Termination
234
Dial and Test with Hold
234
Noise Filter Circuitry
235
Input Select/Notch Filter/25 Db Amp
235
Filter Block Diagram
235
Autorange Block Diagram
236
Transmitter
237
Level Detectors
237
Impulse Noise Detectors
237
Test Signal Generation Method
238
Stair Step Sinewave
238
Circuit Description
239
Transmitter Block Diagram
239
Power Supply Theory
241
AC Line Supplies
241
Power Supply Block Diagram
241
Regulators
242
Charger Board Theory of Operation
243
Charger Board Block Diagram
243
Battery Charging
244
Power Source Selection
244
Relay Drive Circuitry
244
Inhibit Circuit
244
Periodic/Failure Maintenance
246
Component Replacement
246
Soldering
246
Cleaning
246
Disassembly
247
Receiver Board/Shield Plate/Battery Charger Board Disassembly
247
Remove Case
247
Switch Board/Front Panel Removal
248
Transmitter Board Removal
248
Reassembly
249
Instrument Troubleshooting
250
Power Supply Troubleshooting
251
Minimum Core Troubleshooting
252
Procedure
253
Display Troubleshooting
254
Control Troubleshooting
254
Control and Counting Section Troubleshooting
254
Troubleshoot Keyscan/Interrupt Circuitry
254
Transmitter Troubleshooting
255
Transmitter Signature Analysis Procedure
255
Transmit Clock Generator
255
Reference Signatures
256
Digital to Analog Conversion
257
Filter and Signal Select Circuitry
258
Output Select MUX
259
Output Amplifier
260
Transmit Monitor
261
Receiver Troubleshooting
261
Hz Waveform
261
Transmit Monitor Test
261
Set up
262
Overall Transmit Monitor Test
262
Transmit Monitor Test Output
262
Transmit Monitor Signal
263
Noise Filter
263
Simplified Autorange Check
264
Detector Select
265
Input Transformer
266
Noise to Ground Input Path
266
Tone Dropout Signal Path
267
Notch Filter
267
Autorange
267
Impulse Noise Circuitry
268
Detector Troubleshooting
268
A2U1B Voltages
269
TP3 Voltages
269
Charger Board Troubleshooting
270
Relay Drive Circuitry, Low Voltage Inhibit Circuitry
271
Inhibit Circuitry AC and Low Voltage
272
Delay and Relay Drive Circuitry
272
AC and Low Voltage Inhibit Troubleshooting
273
Service Aids
275
Service Selection of Input/Notch Filter/25 Db AMP
275
Service Selection of Noise Filters by Hand
276
Service Selection of Autorange Gain for Service
276
Hand Selection of Noise Filters
276
Hand Selection of A3C57 and A3C160 for Desired Frequency Response
277
Autorange States
277
Filters: Response of each Stage
278
Hand Selection of C57 and C160
278
C-Message Filter
279
3 Khz Filter
279
15 Khz Filter
279
Program Filter
279
PAR Filter
280
150 Khz Low Pass Filter
280
110 Khz Low Pass Filter
281
Bell C-Message Filter
281
Signal Flow Diagram
285
A1 Front Panel Schematic Diagram
286
A3 Receiver Board Component Location
296
A3 Receiver Board Schematic Diagram
303
A4 Transmitter Board Component Locator
317
A4 Transmission Board Schematic Diagram
330

HP 4935A Operating And Service Manual

HP 4935A Operating And Service Manual (205 pages)

Transmission Impairment Measurement Set

Brand: HP | Category: Measuring Instruments | Size: 2.84 MB

HP Categories

Desktop

Laptop Server

Monitor

Switch

More HP Manuals

HP 4935A Manuals

HP 4935A Operating And Service Manual (351 pages)

Table of Contents

HP 4935A Operating And Service Manual (205 pages)

Related Products

HP Categories