Wavetek 3HRV User manual

WavetekWavetek
WavetekWavetek
Wavetek
CATV Division
5808 Churchman Bypass
Indianapolis, IN 46203-6109
[phone]
[phone]
Fax: [phone]
E-Mail: [email protected]
Internet: http://www.wavetek.com
11/96 Rev. A
Manual Part No.
6510-00-0300
This document contains information proprietary to
Wavetek. The information in this document
is not to be used or duplicated in any manner without
the prior approval, in writing, of Wavetek.
OPERATION MANUAL
MODEL 3HRV
HEADEND REVERSE
SWEEP RECEIVER

WARRANTY
Wavetek warrants that all Products manufactured or procured by Wavetek conform to
Wavetek’s published specifications and are free from defects in materials and workmanship
for a period of one (1) year from the date of delivery to the original Buyer, when used under
normaloperatingconditionsand withintheserviceconditionsforwhichtheyweredesigned.
This warranty is not transferrable and does not apply to used or demonstration products.
The obligation of Wavetek arising from a Warranty claim shall be limited to repairing, or at
its option, replacing without charge, any assembly or component (except batteries) which in
Wavetek’s sole opinion proves to be defective within the scope of the Warranty. In the event
Wavetekisnotabletomodify,repairorreplacenonconformingdefectivepartsorcomponents
toacondition aswarrantedwithina reasonabletimeafterreceipt thereof,Buyersshallreceive
credit in the amount of the original invoiced price of the product.
Wavetek must be notified in writing of the defect or nonconformity within the Warranty
period and the affected Product returned to Wavetek’s factory, designated Service Provider,
or Authorized Service Center within thirty (30) days after discovery of such defect or
nonconformity. Buyer shall prepay shipping charges and insurance for Products returned to
Wavetek or its designated Service Provider for warranty service. Wavetek or its designated
Service Provider shall pay costs for return of Products to Buyer.
Wavetek shall have no responsibility for any defect or damage caused by improper storage,
improperinstallation,unauthorizedmodification,misuse, neglect, inadequate maintenance,
accidentor for any Product which has beenrepaired or altered by anyone other thanWavetek
or its authorized representative or not in accordance with instructions furnished by Wavetek.
The Warranty described above is Buyer’s sole and exclusive remedy and no other warranty,
whether written or oral, expressed or implied by statute or course of dealing shall apply.
Wavetek specifically disclaims the implied warranties of merchantability and fitness for a
particular purpose. No statement, representation, agreement, or understanding, oral or
written,madebyanagent,distributor,or employee of Wavetek, which is not contained in the
foregoing Warranty will be binding upon Wavetek, unless made in writing and executed by
anauthorized representativeofWavetek.Undernocircumstancesshall Wavetekbeliablefor
any direct, indirect, special, incidental, or consequential damages, expenses, or losses,
including loss of profits, based on contract, tort, or any other legal theory.
Extended Warranty Programs
Extended warranties and service contracts are available for new and currently owned
equipment for an additional cost. Contact the Customer Service Department (800 851-
1198) for details pertaining to extended warranties and service contracts.
Return Authorization Procedure
The customer MUST obtain a RETURN AUTHORIZATION NUMBER from the
Customer Service Department (800 851-1198) prior to returning any equipment for
warranty or non-warranty repair. Wavetek accepts no liability for any instrument or
subassembly returned to the factory without this number. Any correspondence regarding
returned instruments or subassemblies should be referenced to that number.

Contents
SECTION 1 - GENERAL INFORMATION
1.1 INTRODUCTION ................................................................ 1-1
1.2 SPECIFICATIONS ............................................................. 1-2
1.2.1 Frequency .................................................................... 1-2
1.2.2 Level Measurement ................................................... 1-2
1.2.3 Hum Measurement..................................................... 1-3
1.2.4 Carrier to Noise Measurement .................................. 1-3
1.2.5 Telemetry .................................................................... 1-4
1.2.6 Transmitter.................................................................. 1-4
1.2.7 Spectrum Mode........................................................... 1-4
1.2.8 Intermodulation Distortion ........................................ 1-5
1.2.9 Depth of Modulation .................................................. 1-5
1.2.10 Serial Interface .......................................................... 1-5
1.2.11 General....................................................................... 1-5
1.2.12 Powering .................................................................... 1-6
1.2.13 Standard Accessories................................................. 1-6
1.2.14 Options....................................................................... 1-6
1.2.15 Optional Accessories................................................. 1-6
SECTION 2 - INSTALLATION
2.1 INTRODUCTION ............................................................... 2-1
2.2 UNPACKING AND INSPECTION ................................... 2-1
2.3 INSTALLATION .................................................................. 2-1
2.4 WARRANTY INFORMATION .......................................... 2-2
2.5 POWER REQUIREMENTS ............................................... 2-3
2.6 CABLE SPECIFICATIONS ................................................ 2-3
2.7 TECHNICAL SUPPORT .................................................... 2-5

2.8 WORLDWIDE SALES OFFICES .....................................2-5
SECTION 3 - USER INTERFACE
3.1 INTRODUCTION .............................................................. 3-1
3.2 FRONT-PANEL DESCRIPTION ................................... 3-1
3.2.1 Soft Keys ...................................................................... 3-1
3.2.2 Measurement Mode Selection Keys ......................... 3-2
3.2.3 Support Mode Selection Keys ................................... 3-3
3.2.4 Arrow Keys .................................................................. 3-4
3.2.5 Alpha-Numeric Entry Keys ....................................... 3-5
3.2.6 Printing ........................................................................ 3-6
SECTION 4 - OPERATION - HOW TO USE THE 3HRV
HEADEND REVERSE SWEEP RECEIVER
4.1 INTRODUCTION .............................................................4-1
4.1.1 Wavetek Stealth Reverse Sweep Concept .............. 4-1
4.1.2 Basic Reverse Sweep Procedure .............................. 4-1
4.1.3 Interfacing With Different Network Architectures 4-2
4.2 HOW TO SETUP YOUR 3HRV ..................................... 4-5
4.2.1 How to Setup for Reverse Sweeping .......................4-5
4.2.2 How to Setup for Measurement Modes .................. 4-12
4.3 SETUP.................................................................................. 4-13
4.3.1 General Setup.............................................................4-14
4.3.2 Measurement Setup................................................... 4-18
4.3.3 How To Setup Your Channel Plan .......................... 4-19
4.3.4 How To Edit Channel Parameters .......................... 4-22
4.3.5 Reverse Sweep ........................................................... 4-28
4.3.6 Editing a Reverse Sweep Plan ................................. 4-34
4.4 HOW TO PERFORM LEVEL MEASUREMENTS.... 4-35
4.5 HOW TO MEASURE TILT-BALANCING AN
AMPLIFIER ........................................................................4-37
4.6 SCAN MODE ......................................................................4-39

4.7 HOW TO MEASURE C/N ................................................ 4-43
4.8 HOW TO MEASURE HUM ............................................. 4-45
4.9 MODULATION ................................................................. 4-46
4.10 SPECTRUM ANALYZER MODE ................................ 4-47
4.11 SWEEP MODE ................................................................. 4-52
4.12 FILE.................................................................................... 4-54
4.12.1 How to Store/View/Delete Measurement Files ... 4-54
4.13 AUTO ................................................................................. 4-55
4.13.1 How to Create/Edit/Delete Test Locations ......... 4-55
4.13.2 How to Perform an Auto Test ................................ 4-59
4.13.3 Viewing/Printing Auto Test Files .......................... 4-67
4.14 STATUS ............................................................................. 4-73
APPENDIX A: STATUS INDICATORS ............................... A-1
APPENDIX B: USER MESSAGES ......................................... B-1

1-1
SECTION1GENERALINFORMATION
1.1 INTRODUCTION
The 3HRV Reverse Sweep Receiver is a headend rack mounted unit
that handles the reverse sweep job for up to 10 different technicians
on the same cluster of nodes.
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.
Reverse Sweep Alignment
Reverse sweep alignment provides an optimum view of the frequency
response in unoccupied reverse spectrum, leaving nothing to the
imagination. A reverse sweep can uncover mismatch problems which
reveal themselves as standing waves, or diplex filter roll-offs that can
severely hamper the carriage of services in the reverse band.
Ingress Detection and Troubleshooting
The 3HRV provides feedback to the field as to the current condition
of noise and ingress in the headend. Even if the noise or ingress is
"swamping" the telemetry a "picture" of the headend noise/ingress is
sent out to the receiver via a special forward telemetry carrier for
display.
Easy To Read Noise/Ingress Display
The headend instrument provides a continuous display of the noise/
ingress performance of the connected nodes. This provides a quick,
easy way for the headend technician to verify performance. In addi-
tion, the current reverse testing activity can be monitored.
The 3HRV also 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.
MODEL 3HRV

1-2
The 3HRV is a full-featured signal analysis meter, with a complete
spectrum display and an analog representation of single channel
measurement data. When tuned to a specific channel, a comprehen-
sive set of information is provided: tuned channel, video frequency
and level, audio frequency and level, the difference between video
and audio carrier levels.
The 3HRV is a standard 19" rack mount unit, that weighs approxi-
mately fifteen pounds. Its 320 X 240 dot matrix LCD shows measure-
ment data in both graphical and numerical form.
The contents of this manual will describe the care and operation of
the Headend Reverse Sweep Receiver, including Reverse Sweep
operation.
1.2 SPECIFICATIONS
1.2.1 Frequency
Range: 5 to 1,000 MHz
Accuracy: + 10 ppm at 25°C; + 10 ppm drift over
temp.; + 3 ppm/year aging
Resolution Bandwidths: 30, 280 kHz (30 kHz for CSO)/CTB only)
Tuning Resolution: 10 kHz
Sweep Resolution: 250 kHz maximum
1.2.2 Level Measurement
Range: -40 to +60 dBmV
Resolution: 0.1 dB
Accuracy: + 1.0 dB from 0 to + 40°C (typical),
(relative to 25°C)

1-3
Digital Average Power
Option Accuracy: +1.8 dB at 25°C
1.2.3 Hum Measurement
(carrier > 0 dBmV) Non-scrambled channels only
Range: 0 to 10%
Resolution: <0.2%
Accuracy: +0.7%
1.2.4 Carrier to Noise Measurement
Non-scrambled channels only. No preselection required for 78
channels at +10 dBmV input level.
Carrier to Noise Ratio
Depth of Measurement Characteristics
Video Carrier Level (dBmV)
Carrier to Noise Range
0
10
20
30
40
50
60
-10 0 10 14 24
*Specified results with the measurement offset within 2 to 3 MHz
range above the video carrier.”
Resolution: 0.5 dB
Range 52 dB maximum
*
+3.0 dB Accuracy
+2.0 dB Accuracy
Out of Measurement Range

1-4
1.2.5 Telemetry
Frequency: User defined, 5 to 1,000 MHz
Modulation: FSK, 100 kHz deviation
Spectrum Required: »1 MHz recommended
1.2.6 Transmitter
Frequency Range: 5 to 1,000 MHz
Level Range: +20 to +50 dBmV; settable in 2 dB
increments
Spectral Purity: Hars -30 dBc; Spurs -35 dBc
1.2.7 Spectrum Mode
Spans: 3, 5, 10, 20, and 50 MHz (0.3, 0.5, 1, 2, and
5 MHz/div)
Sweep Rates: 2 seconds (50 & 5 MHz)
Display Scaling
and Range: 0.5, 1, 2, 5, and 10 dB/division; 6 vertical
divisions
Spurious Free
Dynamic Range: 60 dB (typical specifications)

1-5
1.2.8 Intermodulation Distortion
CSO / CTB Characteristics
Video Signal Level (dBmV)
Depth of Measurement (dB)
(without preamplification / with
preselection)
0
10
20
30
40
50
60
-20 -10 0 10 20 30
*Typical Specifications
Range: 60 dB maximum
Resolution: 1 dB
1.2.9 Depth of Modulation
Assumes presence of white reference on any VITS line. Non-
scrambled channels only.
Range: 80 to 100%
Resolution: <0.5% at 85%
1.2.10 Serial Interface
Serial, RS232; Epson, IBM Printers
1.2.11General
Log Linearity: +0.5 dB (typical)
Flatness: +0.5 dB @ 25 °C, @ 20 dBmV
*
Out of Measurement Range
+3.0 dB Accuracy
+2.5 dB Accuracy

1-6
Dimensions: 3HRV: 48.3 cm (W) x
13.3 cm (H) x 35.6 cm (D), 19" (W) x 5.25"
(H) x 14" (D)
Weight: 3HRV: 6.8 kg (15 lbs.)
Operating
Temperature Range: 0 to +50°C; 32 to 122°F
1.2.12Powering
Frequency 47 to 63 Hz ~ 100 VA
Input Current: 1.2A @ 100 VAC.
0.5A @ 265 VAC.
Fuse 1.25 A, 250V 5X20mm SLO-BLO (2
required)
1.2.13Standard Accessories
Line Cord
Channel Plan Transfer Cable
Operations Manual
1.2.14 Options
16/64 QAM Digital Carrier Power Measurement - Enables Stealth to
perform accurate level measurements on digital carriers.
1.2.15Optional Accessories
1010-00-0342 Citizen PN60 (thermal fusion) Printer
1019-00-0457 Optional Battery for PN60 Printer
3010-59-0009 Citizen PN60 Printer Ribbons (2) (included with
printer)
1217-50-0159 Citizen PN60 Printer Cable (included with printer)
4010-00-0105 Charger/Adapter 120VAC to 18VDC
1019-00-0437 Charger/Adapter 220VAC to 18 VDC

1-7
SBC-1 Charger for one spare Stealth Battery Cartridge
SBC-6 Charger for up to six spare Stealth Battery
Cartridges
1217-50-0151 Stealth Serial Printer Cable
PP-75 Precision Preselector for Carrier-To-Noise and
Intermodulation Distortion Testing (55 to 440 MHz)
PP-55-110 Tunable Precision Preselector (55 to 110 MHz)
PP-110-220 Tunable Precision Preselector (110 to 220 MHz)
PP-220-440 Tunable Precision Preselector (220 to 440 MHz)
PP-440-880 Tunable Precision Preselector (440 to 880 MHz)
7201 Tunable Precision Preselector (31 to 62 MHz)
7202 Tunable Precision Preselector (62 to 125 MHz)
7203 Tunable Precision Preselector (125 to 250 MHz)
7204 Tunable Precision Preselector (250 to 500 MHz)

2-1
SECTION2INSTALLATION
2.1 INTRODUCTION
This section provides information on how to install the 3HRV
Headend Reverse Sweep Receiver.
2.2 UNPACKING AND INSPECTION
The instrument was inspected, and given final operational and quality
control tests prior to being carefully packaged for shipment. The unit
should operate in accordance with the specifications listed in this
manual.
When unpacking the instrument, inspect the shipping container and
instrument for shipping damage. If the container is damaged, phone
Wavetek immediately. Save the shipping carton and packing materials
for possible future use.
FOR CUSTOMER SERVICE call: WAVETEK: [phone],
International Customers, contact your local Wavetek Representative.
2.3 INSTALLATION
Proper installation of the 3HRV is essential to correct operation of the
system. The 3HRV is typically installed in a headend rack. There are
two different recommendations for setting up the system. One entails
receiving the reverse sweep signal at a standard reverse node com-
biner, and inserting the telemetry with a directional coupler (test
point) at the input of the foward combining network.
Alternately, to prevent from having to tap into the system an addi-
tional time, you may also insert the telemetry by connecting to the
output of the 3ST. The telemetry insertion directional coupler (DC
b) tap loss must be taken into account when setting the insertion level
of the telemetry signal.

2-2
The transmitter output level is variable from +20 to +50 dBmV in 2
dB increments. The output level will be attenuated by the tap value
of the directional coupler. For example, if a telemetry signal level of
+16 dBmV is desired on the system and the output of the 3HRV is
set to +36 dBmV, a directional coupler value of 20 dB may be used,
or the combination of a lower value directional coupler and an
attenuator pad.
An alternate method would be to insert the 3ST Transmitter output
at one of the combining network inputs, and connect the (transmit-
ter) reference input to the headend amplifier input test point. This
method eliminates the need to add directional couplers at the
combiner output.
Note: A diplex filter must be used to couple the foward path to the
input of the 3HRV for all measurement mode operations other
than reverse sweeping.
For detailed setup information, see "Stealth Sweep Start-up Proce-
dure", page 4-1.
2.4 WARRANTY INFORMATION
The 3HRV is covered by a one year parts and labor warranty (for
details, see "Warranty", opposite Table of Contents).

2-3
2.5 POWER REQUIREMENTS
The 3HRV operates on 90-265 VAC, 57-63 Hz single phase input
power source.
2.6 CABLE SPECIFICATIONS
There are two cables associated with the operation of the 3HRV;
Stealth to Stealth, and a Serial Printer cable. The following informa-
tion describes each of the associated cables.
Stealth to Stealth
The Stealth to Stealth cable, (1217-50-0149) provided with each
3HRV, is used for communications between Stealth units.
Rx
Tx
DTR
GND
DSR
RTS
CTS
RI
Tx
Rx
DTR
GND
DSR
CTS
RTS
RI

2-4
Serial Printer Cable
The Serial Printer Cable, (1217-50-0151) can be used to print data
directly from the 3HRV.
Tx
Rx
GND
DTR
Rx
Tx
DTR
GND
DSR
CTS

2-5
2.7 TECHNICAL SUPPORT
We've worked hard to make the 3HRV as easy-to-use as possible.
However, if you have a problem using your unit you can contact
Wavetek's Technical Support for help. You can reach Wavetek's
Technical Support, Monday through Friday between 8 am and 5 PM
at [phone]. Wavetek also maintains a support forum on the
Internet. You can leave messages and a Support Specialist will get
back to you at Internet address: [email protected].
If you received your Stealth unit and found it to be damaged or
incomplete in any way, phone Wavetek immediately. Save the
shipping carton and packing material in the event that you have to
return it.
FOR CUSTOMER SERVICE call: WAVETEK [phone],
International Customers, contact your local Wavetek Representative.
The above numbers can also be accessed on your unit by pressing the
FCN key followed by the help key.
2.8 Worldwide Sales Offices
Austria (Vienna) Hong Kong
Tel: [phone] Tel: [phone]
Fax: [phone] Fax: [phone]
China (Beijing) Japan (Tokyo)
Tel: [phone] Tel: [phone]
Fax: [phone] Fax: [phone]
France (Paris) Singapore
Tel: [phone] Tel: [phone]
Fax: [phone] Fax: [phone]
Germany (Munich) United Kingdom (Norwich)
Tel: [phone] Tel: [phone]
Fax: [phone] Fax: [phone]

3-1
SECTION3USERINTERFACE
3.1 INTRODUCTION
This section will help you become familiar with the front-panel
controls of the Model 3HRV. Included are descriptions of the front-
panel and notes on the use of features.
3.2 FRONT-PANEL DESCRIPTION
The hardware portion of the user interface consists of a 320x240 dot
matrix LCD and a 40-key keypad. The keypad includes:
• eight Soft keys
• eight Measurement Mode selection keys
• four Support Mode selection keys
• four Arrow keys
• sixteen Numeric Entry keys
3.2.1 Soft Keys
There are a total of eight vertically oriented soft keys, four on either
side of the display. The function of each soft key changes depending
on the particular operation being performed. The function is indi-
cated on the display next to the associated soft key. Soft keys are not
always active. When a soft key is inactive, it’s indicator is either
dimmed (grayed) or does not appear at all.

3-2
3.2.2 Measurement Mode Selection Keys
Measurement modes are chosen by pressing the appropriate Mea-
surement Mode Selection key. There is a key for each of the eight
major measurement functions. These keys are located directly below
the display.
LEVEL: Signal level measurements on individual channels are made
by entering a specific channel number and pressing the
channel key. Measurements can also be made by selecting
the carrier with a marker in the Scan mode and pressing the
Level key.
TILT: The Tilt mode simplifies the balancing of pilot levels by
displaying a bar graph with a representation of up to nine
different user selected video carrier levels.

3-3
SCAN: Use the Scan mode to get a good look at absolute carrier
levels. In this mode a bar graph showing all carrier levels is
displayed.
SWEEP: This mode monitors the signals injected into vacant
spectrum areas by the 3SRVs. Also, through telemetry
transmits to the field current condition of noise and ingress
to any 3SRV Receivers that are connected to the system.
NOTE: Telemetry occurs only while the unit is in Sweep mode.
Selecting another mode will result in a loss of telemetry to
any Receivers connected to the system.
C/N: Measures the C/N (carrier to noise) ratio of the tuned
channel or frequency will be displayed.
HUM: Measures the hum modulation of the tuned channel, will
display in either % or dB as selected by the operator.
MOD: Allows the user to listen to the modulation of the tuned
channel of frequency and measure Depth of Modulation of a
video carrier.
SPECT: Provides a Spectrum Analyzer display, and CSO/CTB
measurements.
3.2.3 Support Mode Selection Keys
Support modes are accessed using the Support Mode Selection keys.
There is a key for each of the four support functions. These keys are
located to the right of the display.