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1-1
SECTION 1 GENERAL INFORMATION
1.1 INTRODUCTION
The Wavetek hand-held System Sweep Receiver performs essential
cable TV system preventive maintenance tests with accuracy and
ease. Signal levels, hum, C/N, and frequency response can be quickly
tested without subscriber interference.
The Sweep System is made up of two components; the 3SR Receiver,
and 3ST Transmitter. The contents of this manual will describe the
care and operation of the 3SR Receiver, including Reverse Sweep
option using the 3HRV Headend Reverse Sweep Receiver.
Frequency response is tested by injecting a low level signal in vacant
spectrum areas, and monitoring cable system carrier levels in occupied
spectrum areas. In addition to generating the sweep test signal, the
3ST Transmitter continuously monitors the system carriers. The 3ST
sends headend level readings to the 3SR Receiver with every sweep
update. In this way, any headend level changes are compensated by
the receiver to maintain the utmost measurement accuracy.
With the Reverse Sweep option, a transmitter is built into the hand-
held sweep receiver. The headend sweep transmitter (3ST) is set up
to receive the reverse sweep sent from the field. When a reverse
sweep is activated from a field test point, the headend transmitter
receives the telemetry signal that indicates which receiver is sending
the sweep. The headend transmitter measures the sweep, and sends
the results, along with the serial number of the sending receiver via its
telemetry signal to the field. The field receiver with the tagged serial
number then displays the sweep response as measured in the headend
on its LCD.
The addition of the 3HRV to the Wavetek Sweep System takes the
responsibility of the reverse sweep away from the 3ST. This serves to
speed up the reverse sweep rate. In addition, the 3HRV sends out
reverse ingress/noise information with every update of its forward
telemetry, so reverse telemetry need not be received in order to check
the reverse ingress condition. In addition, the 3HRV allows up to 10
users to sweep the reverse path simultaneously.
MODEL 3SR
- MODEL 3SR 1
- WARRANTY 2
- Contents 3
- MODEL 3SR 7
- 1.2 SPECIFICATIONS 8
- 1.2.3 Hum Measurement 9
- 1.2.5 Frequency Response 9
- 1.2.6 Transmitter 10
- 1.2.7 Telemetry 10
- 1.2.8 Spectrum Mode 11
- 1.2.10 Depth of Modulation 12
- 1.2.11 Serial Interface 12
- 1.2.12 General 12
- 1.2.13 Powering 12
- 1.2.14 Standard Accessories 13
- 1.2.15 Options 13
- 1.2.16 Optional Accessories 13
- SECTION 2 INSTALLATION 15
- 2.5 CABLE SPECIFICATIONS 16
- Serial Printer Cable 17
- 2.6 TECHNICAL SUPPORT 18
- 2.7 Worldwide Sales Offices 18
- SECTION 3 USER INTERFACE 19
- 3.2.4 Arrow Keys 22
- 3.2.6 Printing 23
- 4.1 INTRODUCTION 24
- 4.3 SETUP 26
- 4.3.1 General Setup 27
- 4.3.2 Measurements Setup 31
- 4.3.5 Sweep Receiver 42
- 4.6 SCAN MODE 49
- 4.7 HOW TO MEASURE C/N 53
- • Noise frequency 54
- 4.8 HOW TO MEASURE HUM 55
- 4.9 MODULATION 57
- 4.10 SPECTRUM ANALYZER MODE 58
- 4.11.1 Introduction 63
- 4.11.2 Operation 64
- 4.12 FILE 67
- 4.12.3 Sweep File Overlay 70
- 4.13 AUTO 71
- 4.14 STATUS 91
- 5.1 INTRODUCTION 93
- 5.2 REVERSE SWEEP SETUP 98
- 5.2.6 Select Sweep Direction 104
- SWEEP TESTING 107
- 5.6 REVERSE INGRESS FEATURE 109
- 5.7 REVERSE SWEEP OPERATION 110
- 5.7.3 Reverse Noise Feature 111
- Low Pass Fi l t er 117
- Bi-Directi onal 117
- Test Poi nt 117
- Measurement 117
- Instrument 117
- INTRODUCTION 118
- APPENDIX B USER MESSAGES 119
Verwandte Produkte und Handbücher für Empfänger Wavetek 3SR
Empfänger Wavetek 3HRV Bedienungsanleitung
(8 Seiten)
(8 Seiten)
Empfänger Wavetek 3HRV Bedienungsanleitung
(12 Seiten)
(12 Seiten)
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