Model Two and Model Two Lite Manual

Model Two and Model Two Lite Manual
Model Two and
Model Two Lite
Signal Level Meters
OPERATION
MANUAL
Trilithic Company Profile
Trilithic is a privately held manufacturer founded in 1986 as an engineering and assembly
company that built and designed customer-directed products for telecommunications, military and
industrial customers. From its modest beginnings as a two-man engineering team, Trilithic grew
over the years and broadened its offerings of RF and microwave components by adding
broadband solutions to its product line. This was accomplished with the aquisition of components
manufacturer Cir-Q-Tel and instruments manufacturer Texscan.
Today, Trilithic is an industry leader providing telecommunications solutions for major broadband,
RF and microwave markets around the world. As an ISO 9000:2001 certified company with over
40 years of collective expertise in engineering and custom assembly, Trilithic is dedicated to
providing quality products, services and communications solutions that exceed customer
expectations.
Trilithic is comprised of three major divisions:
•
Broadband Instruments & Systems
Offers test, analysis and quality management solutions for the major cable television
systems worldwide.
•
RF Microwave Components
Provides components and custom subsystems for companies specializing in cellular,
military and other wireless applications.
•
Emergency Alert Systems
Leading supplier of government-mandated emergency alert systems used by HFC service
Model Two & Model Two Lite - Operation Manual
2
Table of Contents
1. General Information .............................................................................................................. 6
Helpful Website ..................................................................................................................... 6
Where to Get Technical Support ............................................................................................. 6
How this Manual is Organized ................................................................................................ 7
Conventions Used in this Manual ........................................................................................... 7
Precautions ........................................................................................................................... 8
2. Introduction ........................................................................................................................... 9
Overview ...............................................................................................................................9
Equipment ........................................................................................................................... 10
Model Two & Model Two Lite Feature Comparison .............................................................. 11
Tilt and Favorite Group Display ....................................................................................... 12
Single Channel Display .................................................................................................. 12
Single Channel Spectrum ............................................................................................... 12
Scan Display .................................................................................................................. 12
Spectrum Display ........................................................................................................... 12
Carrier-To-Noise (C/N) ................................................................................................... 12
Digital Channel Measurement ......................................................................................... 12
Data Logging ................................................................................................................. 13
Limit Test ........................................................................................................................ 13
Auto Test Programs ........................................................................................................ 13
Voltmeter ........................................................................................................................ 13
File Saving, Viewing ....................................................................................................... 13
File Printing .................................................................................................................... 13
3. Walkthrough ........................................................................................................................ 14
Identify Components ............................................................................................................ 14
Key Pad ......................................................................................................................... 15
Navigating Functions ...................................................................................................... 17
Display Screen Description ............................................................................................ 19
Battery Charging .................................................................................................................. 20
4. Setup ................................................................................................................................... 21
Information ........................................................................................................................... 22
General................................................................................................................................ 22
Backlight ........................................................................................................................ 22
LCD Contrast ................................................................................................................. 23
Shutdown Time ............................................................................................................... 23
Temperature Unit ............................................................................................................ 23
Date & Time ................................................................................................................... 24
Model Two & Model Two Lite - Operation Manual
3
Print Setup ..................................................................................................................... 25
LCD Test ........................................................................................................................ 26
Upgrade ......................................................................................................................... 26
Measurement ....................................................................................................................... 27
Transmission .................................................................................................................. 27
Level Units ..................................................................................................................... 27
Single Frequency Setup ................................................................................................. 28
Limit Setup ..................................................................................................................... 29
Reset Max Hold .............................................................................................................. 31
Prior Menu ..................................................................................................................... 31
Channel Plan ....................................................................................................................... 31
Select User Plan ............................................................................................................ 31
Channel Numbers ........................................................................................................... 31
Learn User Plan ............................................................................................................. 31
Edit User Plan ................................................................................................................ 33
Tilt/Level List................................................................................................................... 36
Load Defaults ................................................................................................................. 37
Prior Menu ..................................................................................................................... 37
5. Basic Operation .................................................................................................................. 38
Fast Setup ........................................................................................................................... 38
Single Channel Level Testing ............................................................................................... 39
TV Channels................................................................................................................... 39
Single Channel Spectrum ............................................................................................... 41
Single Frequency Channels ............................................................................................ 42
Digital Channels ............................................................................................................. 43
Dual Audio Channels ...................................................................................................... 44
Frequency Mode .................................................................................................................. 45
Channel Spectrum Scanning ................................................................................................ 46
Display Limits................................................................................................................. 48
Limit Testing ........................................................................................................................ 48
Frequency Spectrum Scanning ............................................................................................ 51
Carrier-To-Noise Measurement ............................................................................................ 53
Tilt and Favorite Channel ...................................................................................................... 54
Battery and Trunk Voltage Measurement .............................................................................. 55
6. Advanced Operation ........................................................................................................... 56
Transmission Characteristic Test ......................................................................................... 56
Auto Test ............................................................................................................................. 60
Level Parameters ........................................................................................................... 63
Spectrum Parameters .................................................................................................... 63
Limit Parameters ............................................................................................................ 64
Model Two & Model Two Lite - Operation Manual
4
Tilt Parameters ............................................................................................................... 65
File Saving, Viewing, and Printing ........................................................................................ 70
Saving a Test Record to a File ........................................................................................ 70
Viewing and Printing File Records .................................................................................. 72
Auto Test Records .......................................................................................................... 76
Printer Connection ............................................................................................................... 78
Serial Printer .................................................................................................................. 79
Parallel Printer ................................................................................................................ 80
7. Specifications ..................................................................................................................... 81
Warranty Information .................................................................................................................. 83
Model Two & Model Two Lite - Operation Manual
5
1
1. General Information Helpful Website
The following website contains general information which may be of interest to you:
http://www.trilithic.com
Trilithic’s website contains product specifications and information, tips, release information,
marketing information, Frequently Asked Questions (FAQs), bulletins and other technical
information. You can also check this website for product updates.
Where to Get Technical Support
Trilithic technical support is available Monday through Friday from 8:00AM to 5:00PM EST.
Callers in North America can dial 1-317-895-3600 or 1-800-344-2412 (toll free). International
callers should dial 1-317-895-3600 or fax questions to 1-317-895-3613. You can also e-mail
technical support at techsupport@trilithic.com.
For quicker support response when calling or sending e-mail, please provide the following
information:
•
Your name and your company name
•
The technical point of contact (name, phone number, e-mail)
•
The Model Two serial number, firmware and hardware version numbers
•
A detailed description of the problem you are having, including any error or information
messages
Model Two & Model Two Lite - Operation Manual
6
How this Manual is Organized
This manual is divided into the following chapters:
•
Chapter 1, “General Information” provides Trilithic contact information and describes how
this Operation Manual is structured.
•
Chapter 2, “Introduction” introduces the equipment and features of the Model Two and
Model Two Lite.
•
Chapter 3, “Walkthrough” describes the components of the Model Two and Model Two Lite.
•
Chapter 4, “Setup” describes the steps needed to perform the setup of the Model Two and
Model Two Lite.
•
Chapter 5, “Basic Operation” describes how to use the basic features of Model Two and
Model Two Lite.
•
Chapter 6, “Advanced Operation” describes how to use the advanced features of Model
Two and Model Two Lite.
•
Chapter 7, “Specifications” shows the technical specifications of the Model Two and Model
Two Lite.
Conventions Used in this Manual
This manual has several standard conventions for presenting information.
•
Connections, Menus, menu options, and user entered text and commands appear in bold.
•
Section names, Web and email addresses appear in italics.
Note: Note: A note is information that will be of assistance to you
related to the current step or procedure.
CAUTION: A caution alerts you to any condition that could cause a
mechanical failure or potential loss of data.
WARNING: A warning alerts you to any condition that could cause
personal injury.
Model Two & Model Two Lite - Operation Manual
7
Precautions
WARNING: The battery MUST be charged with the Trilithic charge cube
provided with the Model Two. Using any other charge cube may damage
the battery.
WARNING: The maximum input voltage to the meter is 100 V
(AC or DC). A larger voltage will damage the meter.
CAUTION: The accuracy of the meter may be affected when in a strong
electromagnetic field.
CAUTION: Do not use the Model Two in any manner not recommended
by the manufacturer.
Model Two & Model Two Lite - Operation Manual
8
2
2. Introduction Overview
Congratulations! You now own Trilithic’s Model Two Signal Level Meter. This instrument is
designed to provide you with optimal features for reduced cost.
Amplitude measurements are fast and efficient. Carrier amplitudes are displayed singly, as a
group (up to 12 “favorites”), or as a full-span display. This product also features a single-channel
Spectrum Mode, which displays the presence of interfering beats in addition to the carrier
amplitudes. The unit lets you take the direct power measurement of QAM signals, carrier-to-noise
measurements, data logging, and also supports a voltmeter function.
5 user-defined channel plans may be stored, and the Model Two can perform a complete test of all
channels in the selected User Channel Plan to specified limits at the press of a single key. It can
also be set to automatically perform Level, Spectrum, Tilt (Favorite), and Limit tests at
programmed intervals unattended.
The Model Two can save files for Level, Tilt, Spectrum, Scan, Limit Test, and Auto Test
measurements. These files can be recalled to display the recorded data, or Scan, Spectrum, and
Limit files can be viewed graphically. The Model Two also makes it easy to obtain a hard copy of
installation data or documentation of a problem via its printer function.
The unit is the ideal signal level meter for HFC installations. It is durable, has many features, and is
simple to use in a wide range of conditions. Its tough, plastic shell and protective jacket make the
Model Two highly resistant to damage from shock and impact. When not in use, the unit and its
accessories are contained in a carrying case.
The Model Two is rugged and convenient to use. It weighs only 1.5 pounds and can be carried and
operated with one hand. All measurement functions are accessible via a single keystroke, and,
with the Fast Setup function, settings for each measurement mode can be accessed at the press
of a single key without going through nested menus. Other functions are simplified though the
combination of dedicated function keys and “softkeys”.
Model Two & Model Two Lite - Operation Manual
9
Equipment
The Model Two comes with the following:
•
Model Two Signal Level Meter
•
Carrying Case
•
Strap (for Carrying Case)
•
Protective Bumper
•
Built-in 3.6 V / 3.5 AH Ni-MH Battery
•
Universal Charger
•
Operation Manual
The following options are also available:
•
Holster (P/N 2130854000)
•
Leather Case - sleeve (P/N 2130856000)
•
Software Kit - includes data cable (P/N 0930089000)
•
Data Cable (P/N 2071351000)
•
Serial Printer Cable (P/N 2071352000)
•
Parallel Printer Adapter (P/N 0440214000)
•
Cigarette Charger Adapter (P/N 2071483000)
•
Replacement Battery (P/N 0090046000)
•
Replacement Charger (P/N 0610165000)
•
Replacement F-connector (0200579000)
For more information, please contact Trilithic at www.trilithic.com or 1-800-344-2412.
Model Two & Model Two Lite - Operation Manual
10
Model Two & Model Two Lite Feature Comparison
Some of the functions described in this manual are not available in the Model Two Lite. A
comparison of the features included in the Model Two Lite vs. the Model Two, is shown in the
following chart.
Feature:
Model Two Lite:
Model Two:
Tilt & Favorite Group Display
X
X
Single Chan. Display
X
X
Single Chan. Spectrum
Scan Display
Spectrum Display
X
X
X
5-65 MHz
5-870 MHz
Carrier/Noise (C/N)
Dig. Chan. Measurement
X
X
X
Data Logging
X
Limit Test
X
Auto Test Programs
X
Voltmeter Function
X
X
File Saving, Viewing
X
File Printing
X
Note: The Model Two Lite can be easily upgraded to a Model Two by
contacting Trilithic Technical Support at 1-800-344-2412.
Model Two & Model Two Lite - Operation Manual
11
Tilt and Favorite Group Display
Press TILT to display a graph showing the amplitudes of up to twelve user-selected video
carriers. This display also shows the calculated difference in amplitude (tilt) between the
highest and lowest channels in the user-selected group. Press TILT again, and the Model Two
displays a numeric list that shows the amplitudes of the carriers in the group.
Single Channel Display
When tuned to a single channel, the Model Two displays bar graphs for the video and audio
carriers. It also shows numeric readouts of the carrier amplitudes and V/A difference.
Single Channel Spectrum
The Model Two can also provide a spectral display of the selected channel including
intermodulation products or other undesired signals that may be present.
Scan Display
Press SCAN to display the full span of video and audio carriers in the selected User Channel
Plan. This mode is useful to make a quick check of your system’s overall flatness and
amplitude. Up to 5 User Plans may be stored.
Amplitude limits can be imposed on the display. By using the Model Two’s frequency marker,
you can zoom in on any suspect channel that appears in the display.
Spectrum Display
Press SPECT to display the spectrum measurements with frequency spans from 2.5 MHz to
62.5 MHz or a full-spectrum scan.
Carrier-To-Noise (C/N)
Press C/N to measure the C/N ratio of the CATV transmission system.
Digital Channel Measurement
The Model Two includes a special single-channel mode you can use to measure the actual
power of a QAM signal. The single-channel spectrum display shows the actual shape of the
modulation “haystack”. This feature provides you with a powerful tool for checking in-channel
flatness or mismatches that might affect digital transmission quality.
Model Two & Model Two Lite - Operation Manual
12
Data Logging
The Model Two has the capability to store the amplitudes of all video and audio carriers (up to
150 channels). These data records can be captured in nonvolatile memory and later recalled
or uploaded to your PC for record keeping.
Each record carries the time, date, and other Model Two information at the time the record is
saved.
Limit Test
The Model Two can perform a complete test of all channels in the selected User Channel Plan
to specified limits at the touch of a single key. All channels are listed with Pass or Fail results,
and the user may select any channel to review its individual test results. In addition, results for
the entire channel plan, such as Maximum Δ Video and Maximum Δ Adjacent Channel, are
seen on the test-result display.
Auto Test Programs
The Model Two can be set to automatically perform Level, Spectrum, Tilt (Favorite), and Limit
tests in user settable time increments. This makes the Model Two ideal for performing
required 24-hour tests. The Model Two may be set to print the stored test results automatically
after measurement, or the file can be viewed, printed, or uploaded to a PC later.
Voltmeter
The Model Two is equipped with a built-in voltmeter that can be used for troubleshooting power
supplies or power drops. The Model Two displays the voltage with a bar graph and numeric
readout. It can accommodate AC or DC voltages up to 100 Volts.
File Saving, Viewing
The Model Two can save records from Level, Tilt (Favorite Channels group), Spectrum, Scan,
or Limit Test measurements either to individual files or all to one file. These files can be
recalled to display the recorded data, and Scan, Spectrum, and Limit graphics can be viewed.
All files may be uploaded to a PC with the Toolbox software for analysis and storage.
File Printing
The Model Two has a print function that makes it easy to connect to a printer for a hard copy of
measurement data and reports. This is useful for obtaining an instant hard copy of your
installation or to document a problem.
Model Two & Model Two Lite - Operation Manual
13
3
3. Walkthrough Now that you have your Model Two out of its box, take a few moments to look it over and become
familiar with its controls.
Note: The thin protective film layer used to protect the display during
shipping should be removed.
Note: Your Model Two’s battery may need to be charged (see Battery
Charging on Page 20).
Identify Components
The Model Two’s function buttons and backlit LCD display are on the front panel. The unit’s charge
socket and printer interface socket are on the bottom. The RF “F” connector is on the top of the
unit. The belt clip is located on the back of the unit.
RF “F” Connector
LCD Display
with Backlight
Key Pad
PC / Printer Interface
Charge Socket
Connectors Located Under
Rubber Cover on Bottom of
Device
Model Two & Model Two Lite - Operation Manual
14
Key Pad
The key pad consists of the various buttons to access the Model Two’s functions. There are
eleven function buttons, two arrow buttons (up, down), the power on/off button and three “soft
buttons” that enable you to perform functions in the display.
Soft Buttons
11 Primary and
Secondary Function
Buttons
Arrow Buttons
ON / OFF
Button
Power Charge
Indicator
Soft Buttons
F1, F2 and F3 are used to access various functions within the display menus. On specific
displays, three boxes appear at the bottom of the display. These boxes correspond to the
three softkeys and provide additional commands such as ENTER, EXIT, SCALE, REF,
movement arrows, etc. (See the individual function displays for more information.)
FREQ
MAX
T
Model Two & Model Two Lite - Operation Manual
15
Function Buttons
The following is a list of the function buttons:
Key
Function
#
Purpose
AUTO
1
Enter Auto Test Mode
TILT
2
Enter Tilt Measurement Mode
LIMIT
3
Enter Limit Test Mode
LEVEL
4
Enter Single Channel / Frequency
Measurement Mode
SCAN
5
Enter Channel Spectrum
Scanning Mode
SPECT
6
Enter Frequency Spectrum
Scanning Mode
SET
7
Use for Fast Setup or
Main Setup Menu
FILE
8
Save or Recall Measurement Files
C/N
9
Enter Carrier-to-Noise Ratio
Measurement Mode
FCN
0
Puts the key pad into alphanumeric mode
for entering numbers or letters
VOLT
.
Check Voltage
(battery and power supply / drop)
Power ON / OFF
Use the POWER ON / OFF
button to turn the device on and off.
Arrow Buttons
Use the UP
and DOWN
buttons to change values within a function display.
Model Two & Model Two Lite - Operation Manual
16
Navigating Functions
Several methods are used to navigate the Model Two’s functions. For some procedures, use
UP and DOWN to make changes within a specific screen such as to increase or decrease
values.
To scroll through a specific display’s menu topics, you generally use the designated soft
buttons (usually F2 and F3).
Entering Numeric Values
Within several displays, you must enter numeric values. Press FCN to put the key pad in its
secondary function mode, then press the number buttons to enter the desired value. For
example, to enter the number 12:
Press
+
+
Then press F1, the soft button for ENTER, to enter the value into the Model Two.
Entering Alphanumeric Characters
Similarly, you must enter alphanumeric data on several screens, such as File names,
Channel labels, and Auto Test program names. As before, you press FCN to put the key
pad into its secondary function mode, then press the buttons to enter the desired value.
When you press a button in function mode, the first entry is the number associated with the
button, after which you press the same button repeatedly to scroll through the letters
associated with the button. To enter a second letter or number using a different button, you
can go directly to the second button for entry. If you want to enter a second letter or number
using the same button as the preceding character, you must press the DOWN arrow to shift
the Model Two control to a new number or letter.
Model Two & Model Two Lite - Operation Manual
17
For example, to enter “TEST” in the Name field, do the following:
1. Press
to switch to function mode.
2. Press
+
+
to enter “T” in the field.
3. Press
+
+
to enter “E” in the field.
4. Press
+
to enter “S” in the field
5. Press
to shift to a new entry with the same key.
6. Press
+
+
to enter “T” in the field.
Tip: If you make an error when entering a number or a name, you can press F2 to go
back and then re-enter it. Press F3 to escape from the operation.
Model Two & Model Two Lite - Operation Manual
18
Display Screen Description
Each display contains the following sections or features.
User
Plan
Time
F1
Display
Indicator
Battery
F2
F3
Main Display
Screen
Time - Displays unit’s time based on time set up parameter (see Date & Time on Page 24).
Battery charge - Shows the approximate percentage of remaining battery charge. Flashes
when the charge drops below 10%.
User Plan - Indicates the selected User Channel Plan.
Display Indicator - Indicates which function is being used.
Main Display Screen - Displays the parameters and graphs of the selected function.
F1, F2, F3 - Indicates the function of the soft buttons in the selected Model Two mode.
Note: The soft buttons vary from function to function on the meter
(see Soft Buttons on Page 15).
Model Two & Model Two Lite - Operation Manual
19
Battery Charging
The Model Two has a built-in 3.6 V / 3.5 AH Ni-MH battery. When fully charged, it can be used for
over six hours. When the battery charge drops below 10%, the battery symbol flashes in the
information line at the top of the display screen. If the charge drops below 5%, the Model Two
shuts off automatically to protect the battery. You cannot turn the Model Two on again until you
recharge the battery.
To charge the Model Two’s battery, connect the charge cube to the charge socket on the bottom of
the Model Two (see Identify Components on Page 14) and plug the charger into an AC outlet.
WARNING: The battery MUST be charged with the Trilithic charge cube
provided with the Model Two. Using any other charge cube may damage
the battery.
While charging, the Model Two display indicates the charging mode with a charging curve and
displays an approximate percentage of charge. The elapsed charging time is also displayed. A full
charge will be achieved in less than 3 hours, after which the Model Two will shut off automatically.
When the battery charge is too low for the Model Two to turn on, but you need to use the unit
immediately
1. Plug the charge cube into the Model Two.
2. When the charging screen appears, press softkey F1 to permit Model Two operation.
CAUTION: The Model Two batteries will not charge during operation in
this F1 mode. Also, any changes in the Model Two user settings, either
manually or by connection to a PC, are not retained in this mode (with the
charge cube connected).
Model Two & Model Two Lite - Operation Manual
20
4
4. Setup When you first press POWER ON/OFF, the Model Two briefly displays the startup screen, then
displays the Level screen.
CAUTION: The Model Two battery may need charging prior to first use
(see Battery Charging on Page 20).
Before using the Model Two, you need to perform some setup procedures from the following
areas:
•
Information (general information about your Model Two and the status of user settings)
•
General (backlight time, contrast, shutdown time, temperature units, date & time, and print
setup)
•
Measurement (signal level units, single frequency setup, limit setup, transmission)
•
Channel Plan (select, learn, and edit the user plan, channel number display, tilt / favorite list)
Note: Model Two PC software may also be used to set up the Model
Two. See the Model Two Toolbox II manual for more information.
To enter the setup display, do the following:
1. Press SET twice to display the main SETUP menu.
Note: Pressing SET once activates the Fast Setup mode to display
setup parameters for the current mode. Pressing SET twice always
displays the main Setup menu. (See Fast Setup on Page 38.)
2. Use F2 and F3 arrows to scroll through the main Setup menu.
3. When the desired command is highlighted, press F1 (ENTER) to select the display.
Model Two & Model Two Lite - Operation Manual
21
Information
The Information display windows contain useful information regarding your Model Two.
The first screen of information shows the unit’s serial number, firmware and hardware version, and
the company’s Web address. You can use the F2 and F3 keys to scroll through other information
screens to see more information about the Model Two, including user settings. Press F1
(ESCAPE) to return to the main Setup menu.
General
Use the General menu screen to set the operational parameters of your unit.
Use F2 and F3 to scroll through the command choices to the desired parameter.
Backlight
This selection determines the backlighting time on the Model Two display. Press F1 (or use
the UP and DOWN arrow keys) to change the backlighting time. The selected time is
displayed in the window near the bottom of the display screen. You can select ON
(backlighting is always on), OFF (backlighting is always off), or 3, 5, 10, or 30 minutes
(activates the backlight for the selected number of minutes, then turns it off to save power).
Model Two & Model Two Lite - Operation Manual
22
LCD Contrast
This selection determines the LCD contrast on the Model Two display. Press the UP arrow key
to darken the contrast and the DOWN arrow key to brighten.
Note: All signal levels below –30 dBmV (+30 dBμV) are displayed with
lighter shade digits in all measurement modes to indicate they are low
signal levels.
Shutdown Time
This selection sets the automatic shutdown timer. Press F1 (or use the UP and DOWN arrow
keys) to change the shutdown time. The selected time is displayed in the window near the
bottom of the display screen. You can select ON (always on until manually turned off), or 3, 5,
10, or 30 minutes (the Model Two shuts itself off when there has been no Model Two activity for
the selected time interval).
A caution screen appears 20 seconds prior to automatic shutdown as shown below. This
screen counts down the remaining time until shutdown and displays the shutdown time setting.
Press any key to reset the shutdown time to its current setting for continued operation, or press
the UP and DOWN arrow keys to change the shutdown time setting.
Temperature Unit
This selection specifies the temperature units used by the Model Two. The selected
temperature units are displayed in the window near the bottom of the display screen. Press F1
or press the UP and DOWN arrow keys to select Fahrenheit or Centigrade.
Model Two & Model Two Lite - Operation Manual
23
Date & Time
This selection sets the date and time. Press F1 to enter the date and time screen.
Do the following to enter the date and time:
1. Press FCN to perform alphanumeric entries. The current date disappears from the
field. Enter the date in the date order displayed to the left of the field.
2. When you are satisfied with your entry, press F1 again to log the date in the Model Two
memory, then press F2 to switch to the time field.
3. Press FCN to switch the Model Two to the numeric function. The current time
disappears from the field. Enter the time (in 24-hour format). If you make a mistake
while entering the time, you can press F2 to back up.
Some tips for entering dates and times:
•
The Model Two automatically assigns the first two digits of the year (20), so you only
need to enter the last two digits of the year.
•
You may change the order of the date between Y/M/D, D/M/Y, and M/D/Y by pressing
the UP and DOWN arrow keys from within the date field.
CAUTION: The desired sequence for the Month, Day, and Year should
be set before any files are saved in the Model Two. If the date sequence
is changed after storing files, the date information for those files will not
be correct.
•
If you make a mistake while entering a date or time, you can press F2 to back up or
press F3 to restore the date or time in the field.
Model Two & Model Two Lite - Operation Manual
24
Print Setup
This selection lets you set up and display printing options.
To select or deselect an option from the Print Setup menu, use F2 or F3 to scroll to the option,
then press F1. A checkmark appears beside each selected option.
PRINT ALL - When this option is selected and multiple tests (Level, Scan, Spectrum, Tilt, or
Limit) are stored in one file, all test reports in that file are printed. When this option is not
selected, only the selected test in the file is printed, regardless of the number of tests stored in
the file.
AUTO TEST PRINT - When this option is selected, the Model Two prints automatically after
each Auto Test is performed. (Be sure to have a printer connected before starting the Auto
Test.) When this option is not selected, automatic printing does not occur after each test. You
can select and print the file at your discretion after testing.
PRINTER SETUP - Press F1 to display the list of printers that may be used. (A checkmark
appears beside the selected printer.) You can change the selected printer by using F2 or F3 to
scroll through the list, then press F1. The Model Two returns to the Print Setup menu.
PRIOR MENU - Press F1 to return to the previous menu.
Model Two & Model Two Lite - Operation Manual
25
LCD Test
This selection tests the LCD display. When you press F1, the Model Two display advances
through four patterns to test the LCD, then returns to the menu. The patterns are all black, all
white, vertical stripes, and checkerboard. Each pattern remains on the screen until you press
F1 to go to the next pattern.
Upgrade
Use this function to enter the authorization code to upgrade a Model Two Lite to full Model Two
features.
Contact Trilithic to obtain an authorization code, then do the following:
1. Press SET (twice) to go to the MAIN SETUP menu.
2. Use the F2 and F3 to select GENERAL and press F1.
3. Use the F2 and F3 to select UPGRADE and press F1.
4. Press function for alpha/numeric entry and enter the 12 digit authorization code and
press F1.
The Model Two will confirm correct entry of the code. Your Model Two Lite is now upgraded to
Model Two.
Model Two & Model Two Lite - Operation Manual
26
Measurement
Use the Measurements menu screen to set the measurement parameters of your unit. Use F2 and
F3 to scroll through the command choices.
Transmission
Use this selection to enable the transmission mode.
Press F1 (ENTER), or press the UP and DOWN arrow keys to enable the Transmission
mode. The selected transmission state (ON or OFF) is displayed in the window near the
bottom of the display screen. Use this parameter to test for transmission characteristics and
loss of in-between connections in your CATV system. (See Transmission Characteristic Test
on Page 56.)
Level Units
Use this selection to set the signal level units for the Model Two. The selected signal level units
are displayed in the window near the bottom of the display screen. Press F1 or press the UP
and DOWN arrow keys to switch between dBmV, dBμV, or dBmW.
Model Two & Model Two Lite - Operation Manual
27
Single Frequency Setup
Press F1 to enter the Single Frequency Setup menu. Use this menu to set the parameters for
the frequency display mode.
To select an item from the Single Frequency Setup menu, use F2 or F3 to scroll to the
selection.
FREQ TUNING STEP - Select the meter’s internal step values by pressing F1, or press the
UP and DOWN arrow keys. The steps can be either 10 MHz, 1 MHz, 100 kHz, 10 kHz, or by
Channel.
VOLUME - Use the UP and DOWN arrow keys to set the volume of the meter’s internal
speaker. The volume may be set to one of 4 levels or OFF. Audio is heard when in the
Frequency mode.
SQUELCH - Press F1 to select or deselect the squelch operation. When squelch is activated,
the audio is muted when the Audio carrier level drops below –30 dBmV (+30 dBμV).
PRIOR MENU - Press F1 to return to the previous menu.
Model Two & Model Two Lite - Operation Manual
28
Limit Setup
Press F1 to enter the Setup menu. Use this menu to set Scan parameters, including test limits.
To select an item from the Scan Setup menu, use F2 or F3 to scroll to the selection.
DISPLAY LIMITS - Press F1, or press the UP or DOWN arrow keys to select or deselect
viewable Limits in Scan mode. When Display Limits is activated, the test limit settings for
Minimum Video and Maximum Video can be seen on the display during channel scanning.
(See Channel Spectrum Scanning on Page 46.)
EDIT LIMITS - Press F1 to enter the Edit Limits menu. All parameters used in a Limit test may
be set in this menu. (See Limit Testing on Page 48.)
Use F2 or F3 to scroll to each limit parameter.
Model Two & Model Two Lite - Operation Manual
29
Select from the following:
Minimum Video Level
-20 to 59 dBmV (40 to 119 dBuV)
Maximum Video Level
-19 to 60 dBmV (41 to 120 dBuV)
Maximum Δ Video
2 to 30 dB
Minimum Video/Audio Difference
0 to 15 dB
Maximum Video/Audio Difference
5 to 30 dB
Maximum Δ Adjacent
0 to 20 dB
24 Hour Video Deviation
0 to 20 dB
A checkmark appears next to each enabled limit parameter. Press F1 (ENTER) to enable or
disable a limit parameter. Disabled limit parameters (indicated with an “X”) are not tested
during a Limit Test.
Press the UP and DOWN arrow keys to change each limit value. You may also press FCN,
enter numeric data, and then press F1 to change a limit.
You may scroll to SET LIMIT DEFAULTS and press F1 to return all limits to their standard
settings.
Once you have set the levels for each parameter, scroll to SAVE AND EXIT and press F1 to
return to the previous screen.
MARKER - Use this selection to switch between channel and frequency indicators for markers
in the Scan mode. Use F1 (ENTER), or press the UP or DOWN arrow keys to change the
marker.
PRIOR MENU - Press F1 to return to the previous menu.
Model Two & Model Two Lite - Operation Manual
30
Reset Max Hold
Use this selection to reset the maximum hold value when using Max hold in Spectrum mode.
Press F1 (ENTER) to reset the Spectrum mode data.
Prior Menu
Press F1 to return to the main Setup menu.
Channel Plan
Use the Channel Plan menu screen to select, learn, and edit up to 5 channel plans for your unit.
Use F2 and F3 to scroll through the command choices.
Select User Plan
Use this selection to set the active user plan. You can have up to five user-defined channel
plans (A—E) on the Model Two. Use F1 (ENTER), or press the UP and DOWN arrow keys to
change the selected user plan.
Channel Numbers
Use this selection to choose the channel identifier in the Model Two. Use F1 (ENTER), or
press the UP and DOWN arrow keys to select between Standard or EIA channel numbering.
Learn User Plan
Use this selection to learn a channel plan (for the selected user plan) from your cable system.
CAUTION: Whenever you learn a new Channel Plan, the previously
edited parameters are overwritten by the new plan, and all files and Auto
Test programs that were saved with the previous plan are deleted.
Model Two & Model Two Lite - Operation Manual
31
Press F1 to learn a channel plan. A prompt appears to instruct you to connect the CATV cable
to the Model Two. A list of 8 base Channel Plans is displayed.
Use F2 or F3 to scroll through the list to the desired base plan. With the CATV cable
connected, press F1, and the Model Two searches for all active channels in your system. A
progress bar at the bottom of the screen indicates search progress.
Once the search is completed, the Model Two displays a prompt indicating the new Channel
Plan is being saved. This learned Channel Plan (for the selected User Plan) has all active
channels enabled . Those channels with levels less than -15 dBmV (45 dBμV) are not enabled.
Note: If a Channel Plan is learned with less than 3 active channels found
(or the cable is not connected to the Model Two), all channels in the plan
are enabled.
After learning a Channel Plan, the Model Two returns to the Level Measurement mode. You
may then modify the various parameters in the plan.
To return to the Channel Plan Setup menu to edit your User Plan, press SET twice to return to
the main Setup menu, use F2 or F3 to scroll to the Channel Plan selection, press F1 (ENTER)
to display the Channel Plan menu and then use F2 or F3 to scroll to Edit User Plan.
Model Two & Model Two Lite - Operation Manual
32
Edit User Plan
Once you have learned a Channel Plan, you can edit the plan.
CAUTION: Whenever you edit a Channel Plan, all files and Auto Test
programs that were saved with the User Plan prior to editing are deleted.
Press F1 to display the selected User plan for editing.
Within the Edit User Plan display, use F2 or F3 to scroll through the list of channels. All enabled
channels have a checkmark under ENA. When the channel you wish to modify is highlighted,
press F1 (ENTER). The selected Channel Setup screen appears.
To select the channel’s parameters, use F2 and F3 to scroll up and down the list. There are
different methods for modifying each parameter.
Note: When using FCN to make an alphanumeric entry, remember to
press F1 (ENTER) once you have made an entry to store the new data.
(See Entering Alphanumeric Characters on Page 17.)
Model Two & Model Two Lite - Operation Manual
33
EIA Number - Press FCN to switch to alphanumeric entry mode, then enter the desired EIA
number for the channel. When you are satisfied with your entry, press F1 (ENTER) to store the
change.
Standard Number - Press FCN to switch to alphanumeric entry mode, then enter the desired
standard number for the channel. Press F1 (ENTER) to store the change.
Channel Label - Press FCN to switch to alphanumeric entry mode, then enter the desired
label (up to 5 characters) for this channel. Press F1 (ENTER) to store the channel label.
Active Status - Press F1 to switch between ENA (enabled) and DIS (disabled). Enabling a
channel adds it to the selected User Channel Plan. Disabling a channel removes it from the
User Plan.
Type - Use F1 to toggle between the channel types (TV, SIGL, DIGI, or DUAL).
Note: The rest of the parameters in the edit list are affected by which
type of channel is selected.
TV - Audio and Video carriers (parameters: Frequency, Audio Offset)
SIGL - Single Frequency Channels (parameters: Frequency, Measure BW)
DIGI - Digital Channels (parameters: Frequency, Measure BW)
DUAL - Dual Audio Channels—(parameters: Frequency, Audio 1 Offset, Audio 2 Offset)
Frequency - Press FCN to switch to Numeric Entry mode and enter the desired frequency
(Video Frequency for TV and DUAL type channels or Center Frequency for DIGI and SIGL type
channels). Once the desired modification is made, press
F1 to store the change.
Note: The new frequency you enter should always be less than
870 MHz.
Aud Offset - Press FCN to switch to Numeric Entry mode and enter the positive offset of the
audio frequency from the video carrier. Press F1 (ENTER) to store the change. (This
parameter appears for TV type only).
Note: The sum of this offset and the video carrier frequency should never
be more that 870 MHz.
Model Two & Model Two Lite - Operation Manual
34
Measure BW–-Press FCN to switch to Numeric Entry mode and enter the measurement
bandwidth for this channel. Press F1 (ENTER) to store the change. (This parameter appears
for DIGI and SIGL types only.)
Note: The sum of ½ of this bandwidth and the center frequency should
never be more that 870 MHz.
Aud1 Offset—Press FCN to switch to Numeric Entry mode and enter the positive offset of the
first audio frequency from the video carrier. Press F1 (ENTER) to store the change. (This
parameter appears for DUAL type only).
Aud2 Offset—Press FCN to switch to Numeric Entry mode and enter the positive offset of the
second audio frequency from the video carrier. Press F1 (ENTER) to store the change. (This
parameter appears for DUAL type only).
Note: The sum of this second offset and the video carrier frequency
should never be more that 870 MHz.
When you are satisfied with your entries, highlight SAVE AND EXIT and press F1 (ENTER) to
return to the Edit User Plan screen.
Adding a Channel: A channel may be added while in the Edit User Plan list of channels by
pressing the UP arrow key. A Channel Edit screen appears for the new channel with the next
available channel number assigned. This channel number may be changed, but an existing
number in the plan (enabled or not) may not be used. Other parameters on the new Channel
Edit screen should be set, including frequency, which has a default setting of 5 MHz. When
finished, select SAVE AND EXIT and press F1 (ENTER) to return to the Edit User Plan
screen.
All channels, including a new channel, appear in the Channel Plan according to frequency—not
channel number.
Model Two & Model Two Lite - Operation Manual
35
Deleting a Channel: A channel may be entirely deleted while in the Edit User Plan list of
channels by pressing the DOWN arrow key. If a channel is deleted, it will not be available to
enable later, and it will not be scanned in the full spectrum scan mode. It is recommended that
a channel be disabled instead of deleted from the plan.
When you have completed your changes to all channels that require edit in the User Plan,
press SET to save the modifications and return to the main Setup menu.
CAUTION: All edits are temporarily stored until you exit the Edit User
Plan screen. Do not turn off the Model Two before exiting the Edit User
Plan screen, or the changes will not be saved.
Tilt/Level List
This feature lets you select up to twelve favorite channels. These channels are also used when
making the Tilt measurement.
Note: You must select at least four channels to make the Tilt
Measurement. The Model Two uses the highest and lowest frequencies
when making the measurement.
Press F1 (ENTER) from the Tilt/Level List selection on the Channel Plan Setup menu to enter
the Tilt Setup screen.
To add a channel to the Favorites list, use F2 and F3 to scroll the list of channels in the
selected User Plan. When the desired channel is highlighted, press F1. A check mark appears
next to the channel under the Tilt column, and the channel number is placed in the Favorites
column at the bottom of the display. As you add channels, the Favorites list arranges them in
order of their frequency. For example, even if you selected Channel 14 first, as you add
Channels 4 and 6, these channels go to the top of the list.
TIP: Use the UP and DOWN arrow keys to scroll through the User Plan list one page (6
channels) at a time.
Model Two & Model Two Lite - Operation Manual
36
To delete a Tilt/Favorite channel, scroll to the channel and press F1. The channel is removed
from the list.
Once you have selected from four to twelve favorite channels, press SET to save the
information and return to the main Setup menu.
Load Defaults
Press F1 (ENTER) to load the factory default settings for the Model Two and then display the
Level screen.
Prior Menu
Press F1 (ENTER) to return to the main Setup menu.
Model Two & Model Two Lite - Operation Manual
37
5
5. Basic Operation Once you have set up the Model Two’s parameters, you are ready to operate the unit.
There are a number of tests you can perform with the Model Two:
•
Single channel level tests
•
Frequency mode
•
Channel spectrum scans
•
Limit tests
•
Frequency spectrum scanning
•
Carrier-to-noise
•
Tilt and favorite channel levels
•
Battery and trunk voltage
Note: The Model Two displays readings down to -50 dBmV (+10 dBμV).
All signal levels that are below -30 dBmV (+30 dBμV) are displayed with
lighter shade digits in all measurement modes to indicate they are low
signal levels.
Fast Setup
The Model Two features a Fast Setup function for each measurement mode (except Carrier-tonoise and Voltage that do not require setup). The specific setup menu for each mode can be
accessed directly by pressing the SET key once while in the Measurement mode. This makes it
unnecessary to go back to the main Setup menu and look for nested submenus. This allows the
operator to quickly make changes in the settings and return to Measurement mode with no wasted
time.
Note: Pressing the SET key twice always displays the main Setup
menu.
Model Two & Model Two Lite - Operation Manual
38
Single Channel Level Testing
When set to the single channel level test, the Model Two displays bar graphs of the video and
audio carriers as well as numeric readouts of the carrier amplitudes and V/A difference. The
Model Two can also display a spectrum scan of the selected channel showing the amplitudes of
the video and audio carriers and undesired signals that may be present, such as intermodulation.
To access the Level screen, press LEVEL.
The Model Two displays the Level screen for the last channel it was on before being turned off.
TV Channels
When measuring a TV type channel with audio and video carriers (see Edit User Plan on
Page 33), the left column of the bar graph represents the video carrier while the right column
displays the audio carrier. The V/A Δ is displayed below the video and audio carriers.
Channel Label
User Plan
Channel
Video Carrier
Channel Type
Audio Carrier
V/A Δ
F1
F2
F3
To change the channel, use the UP and DOWN arrow keys or press FCN, enter the desired
channel number, and press F1 (ENTER).
The Level screen displays a scale that you can adjust by pressing F3 (DOWN) so that the
functions of softkeys F1 and F2 become SCALE and REF. Press F1 (SCALE) to vary the
graduation of the scale according to a 1, 2, 5, and 10 dB per division scale.
Model Two & Model Two Lite - Operation Manual
39
For example, to change the display graph from a 10 dB scale to a 5 dB scale, press F1 three
times to cycle through the steps.
You may also change the reference level of the graph. Press F2 (REF) and then press the UP
and DOWN arrow keys to increase or decrease the reference by one digit at a time.
Note: The amplitude of the graph changes as you change the scale and
reference so that it continues to indicate the correct level. You must press
F3 (UP) to return to the original Level screen for the UP and DOWN
arrow keys to change channels (instead of reference) again.
Press F3 (UP) to return to the original Level screen so that the functions of softkeys F1 and F2
become FREQ and MAX.
The Model Two digital readout can be set to display a LIVE, MAX, or Δ P-P signal level as an
aid to troubleshooting. Press softkey F2 to select the desired display mode as described
below:
•
LIVE is the normal operating mode whereby the digital display indicates the current
value of the input signal.
•
In the MAX mode, the digital display indicates the maximum level of the input signal. In
this mode, an “M” is displayed after the digital reading.
•
In the Δ P-P mode, the digital display indicates the variation in the input signal level. In
this mode, a “Δ” is displayed after the digital reading.
Model Two & Model Two Lite - Operation Manual
40
The analog bar graphs for Audio and Video continue to indicate the LIVE level in all modes,
while the wavy line at the top of each bar indicates the maximum level of the Audio and Video
signals.
Single Channel Spectrum
The Model Two can scan the spectrum of the designated channel automatically. This function is
particularly useful for CATV measurements. To scan the channel spectrum, press LEVEL again.
The Model Two displays the spectrum screen and scans the channel for data, which it then
graphs on the screen.
The Center Frequency and Channel Number are displayed, along with the Marker Frequency
and Level. Use the UP and DOWN arrow keys to move the Marker Frequency to any position
in the channel spectrum.
A Δ Marker function can also be used to check the distance (in MHz) and amplitude difference
between any 2 points in the displayed spectrum. First, use the UP and DOWN arrow keys to
move the marker to a reference position, then press F2 (Δ MKR). The UP and DOWN arrow
keys now move the second marker from the reference position, and the Δ Frequency and Δ
Level are displayed. Press F2 (MARK) to return to the normal single-marker spectrum display.
Use F1 (AUTO) to automatically set a scale and reference for the displayed spectrum graph.
You may also set the Scale and Reference manually by pressing F3 (DOWN) and using F2
and F3 for Scale and Reference as described for the preceding Level display mode.
Model Two & Model Two Lite - Operation Manual
41
Single Frequency Channels
You can use the Model Two to measure a Single Frequency level over a specified bandwidth.
To do this, first set the Model Two’s channel type to SNGL or single frequency channel (see
Edit User Plan on Page 33).
TIP: While in Level mode, you can use Fast Setup to go directly to the setup parameters
for the current channel.
The level for the signal is displayed along with an F to indicate Single Frequency mode. Also
displayed are Δ FREQ and Δ AMP to indicate the distance and amplitude difference between
the center frequency and the highest peak of the signal in the bandwidth.
To scan the channel spectrum, press LEVEL again.
Note: With a Single Frequency Channel, the Level (Live, Max, Δ p-p),
Scale, Reference, Auto, Marker, and Δ Marker may be used as
described for TV Channels.
Model Two & Model Two Lite - Operation Manual
42
Digital Channels
You can use the Model Two to measure the average power of a digital channel according to
the configured bandwidth. To do this, first set the Model Two’s channel type to DIGI (see Edit
User Plan on Page 33).
The level for the signal is displayed, along with a P to indicate the power level over the
specified bandwidth for DIGI mode.
To scan the channel spectrum, press LEVEL again.
Note: With a Digital Channel, the Level (Live, Max, Δ p-p), Scale,
Reference, Auto, Marker, and Δ Marker may be used as described for
TV Channels.
The Marker level indicated for a DIGI signal in the channel spectrum mode is only the level at
the marker frequency and not the total power for the channel bandwidth. You can return to the
single-channel level mode (press LEVEL again) to read the total power of the set bandwidth.
Model Two & Model Two Lite - Operation Manual
43
Dual Audio Channels
You can use the Model Two to measure TV signals with dual Audio channels. To do this, first
set the Model Two’s channel type to DUAL, or dual audio channel (see Edit User Plan on
Page 33).
The level for the Video and both Audio channels is displayed, along with V/A Δ for each audio
level.
To scan the channel spectrum, press LEVEL again as described for other channel types.
Note: With a Dual Audio Channel, the Level (Live, Max, Δ p-p), Scale,
Reference, Auto, Marker, and Δ Marker may be used as described for
TV Channels.
Model Two & Model Two Lite - Operation Manual
44
Frequency Mode
When set to the Frequency Mode, the Model Two displays the frequency and level for the desired
channel. To access this screen, press LEVEL.
The Single Channel Level screen is displayed.
Now, press F1 (FREQ).
This toggles the Model Two so that it displays the Frequency screen for the channel designated in
the Single Channel Level screen.
If the channel is a TV or DUAL type channel with audio and video carriers, the Model Two is tuned
to the audio frequency (Audio 1 if dual type). The signal level and peak level are displayed.
If the Volume has been set, you hear the channel’s audio. If the Squelch function has been
enabled, audio is heard only with signal levels above -30 dBmV (+30 dBμV).
TIP: While in Frequency mode, you can use Fast Setup (press SET once) to go directly to the
Single Frequency Setup parameters including volume, squelch, and frequency steps.
To change the frequency that is being measured, press the UP and DOWN arrow keys. The
frequency moves in increments set in the Single Frequency Setup menu.
Note: By pressing FCN, you can enter the desired frequency. To finish,
press F1 (ENTER).
The level display can be set to display a LIVE or Δ P-P (variation) signal level by pressing the
softkey F2.
The Scale and Reference shown on the Frequency screen can be adjusted by pressing F3
(DOWN) so that the functions of softkeys F1 and F2 become SCALE and REF. Press F1
(SCALE) to vary the graduation of the scale by 1, 2, 5, and 10 dB per division. Press F2 (REF)
and then press the UP and DOWN arrow keys to increase or decrease the reference.
Press F3 (UP) to return to the original softkey functions of CHAN and Δ P-P so the UP and
DOWN arrow keys change frequency (instead of reference).
Model Two & Model Two Lite - Operation Manual
45
Channel Spectrum Scanning
The Model Two is designed to display the full span of video and audio carriers in your system.
This function provides a quick check of your system’s overall flatness and amplitude.
The Model Two can also be set to display the video and audio carriers at reduced frequency
spans. Amplitude limits can be imposed on the display, while a convenient Frequency Marker
enables you to zoom in on any suspect channels.
To enter the Channel Spectrum Scanning screen, press SCAN. The currently selected User
Channel Plan measurement data is displayed in a graph with a viewing range of 126 channels.
(This can be extended to 150 by adjusting the Scan Marker line).
The Audio levels are shown graphically with a light shade, while Video levels are shown darker.
Digital channels (DIGI) and Single Frequency channels (SNGL) that do not have separate audio
and video components are shown as all dark.
The Model Two also displays the marker (channel or frequency) and its video, audio, and V/A Δ
levels along with the Low (starting) and High (ending) frequencies.
When entering Scan mode, the marker is positioned on the last channel used in Level mode. This
makes it easy to quickly view a selected channel within the channel plan.
To change the marker channel, press the UP and DOWN arrow keys. You can also press FCN
and enter the channel (or frequency if selected), then press F1 to move the marker to the desired
location.
Note: The marker may be changed from channel number to frequency:
Press SET once for Fast Setup, select Marker, and press F1 to change
the marker indication.
Model Two & Model Two Lite - Operation Manual
46
You can zoom in on the marker position by pressing SCAN. The Model Two supports 5 levels of
magnification (1x, 2x, 3x, 4x, and 5x).
The minimum span (5x) shows 25 channels of data.
To return to the original zoom level, keep pressing SCAN to cycle through the zoom
magnifications.
You can stop the scanning process so you can study the graph without losing the current data. In
the Channel Scan screen, simply press F2 (HOLD). The scanning marker stops moving. To
resume scanning, press F2 (TRIG).
To set the reference level and the scale automatically, press F1 (AUTO). The Model Two selects
the optimal scope for your system.
The Scale and Reference shown on the Channel Scan screen can also be adjusted manually by
pressing F3 (DOWN) so that the functions of softkeys F1 and F2 become Scale and Ref. Press
F1 (SCALE) to vary the graduation of the scale by 1, 2, 5, and 10dB per division. Press F2 (REF),
then press the UP and DOWN arrow keys to increase or decrease the reference. Press F3 (UP)
to return to the original softkey functions of Auto and Hold.
Model Two & Model Two Lite - Operation Manual
47
Display Limits
When Display Limits is set to Yes in the Scan Setup menu (see Limit Setup on Page 29), the
Channel Scan display shows the limit lines for the specified Minimum Video level and
Maximum Video level.
TIP: While in the Channel Scan mode, you can use Fast Setup (press SET once) to go
directly to the Scan Setup parameters, including Marker type, Display Limits, and the Edit
Limits screen.
Limit Testing
The Model Two can quickly perform a test of the cable system to specified test limits with a single
key press. The selected User Channel Plan is tested to all enabled limit parameters as set in the
Edit Limits display from the Limit Setup menu. (See Limit Setup on Page 29.) To perform the
Limit Test, press LIMIT.
Channels are displayed momentarily as each channel is scanned. In addition, a progress bar
indicates the scan status.
Model Two & Model Two Lite - Operation Manual
48
When the Limit Test is complete, a Test Result summary screen appears to indicate the Pass or
Fail status for each test parameter. Each test that has passed has a checkmark next to that
parameter. Each test that has failed has an X next to that parameter.
The Maximum Δ Video and Maximum Δ Adjacent channel status are determined by the results of
the overall channel plan measurements. Press F2 or F3 to view the Minimum and Maximum Video
channels and levels. Also, if a failure has occurred for the Maximum Δ Adjacent channel test, the
adjacent channels with the greatest variation are listed.
Note: A digital (DIGI) type channel is measured during the Limit Test but
is not used to determine Pass or Fail for any of the tests.
The Minimum Video, Maximum Video, Minimum Δ V/A, and Maximum Δ V/A are tested for all
channels in the User Plan. If any channel fails one of these tests, the Test Result summary
indicates a failure (X) for that test. If all channels pass one of these tests, the Test Result summary
indicates a pass (checkmark) for that test.
Model Two & Model Two Lite - Operation Manual
49
The results for each channel from the individual channel tests can be viewed by pressing F1
(LIST). The total number of failed channels is shown at the top of the display, and each channel is
listed with the channel type, signal level (Video level if TV or Dual type), and a pass or fail
indication. Each channel that has passed all four individual channel tests displays a checkmark.
Each channel that has failed any of the 4 individual channel tests displays an X”.
You can use F2 and F3 to scroll through the list of channels one at a time, or use the UP and
DOWN arrow keys to scroll one page (8 channels) at a time.
Press F1 to look at the Limit Test information for a specific channel.
The Video level, Audio level, and Δ V/A for the selected channel are shown at the top of the
individual channel information screen. The Limit Test setup for the channel test parameters is
displayed at the bottom of the screen with a Pass or Fail indication for each parameter.
Model Two & Model Two Lite - Operation Manual
50
Frequency Spectrum Scanning
The Model Two can be set to display spectrum measurements with spans ranging from 2.5 to 62.5
MHz. It can also be set for a full spectrum scan of the base channel plan with sampling at each
video carrier frequency.
Note: The Model Two can show spectrum data with absolute
measurements, or it can store data for comparative tests using the
TRANSMISSION feature.
Note: TRANSMISSION mode is set up in the Measurement menu. Since
the following data is for normal (absolute) spectrum scanning,
TRANSMISSION should be set to OFF in the MEASUREMENT menu
(see Measurement on Page 27).
TIP: While in the Spectrum mode, you can use Fast Setup (Press SET once) to go directly to
the Measurement Setup parameters including Transmission.
For further information on Transmission operation, see Transmission Characteristic Test on
Page 56.
The following information is for normal (absolute) spectrum scanning.
To enter the Frequency Spectrum Scanning screen, press SPECT.
When the Full Spectrum scan is displayed, the Span indicator (SP) is displayed as PLAN_A-E
(full span of selected user base plan). The starting frequency (ST) is shown along with the marker
frequency and level.
Note: With Full Spectrum scan, all video carrier frequencies in the
selected Base Channel Plan (including those disabled for Channel Scan)
are scanned.
Model Two & Model Two Lite - Operation Manual
51
To move the marker frequency, press the UP and DOWN arrow keys.
To change the scanning bandwidth, press F2 (SPAN). The span cycles through 2.50M, 6.25M,
12.50M, 25.00M, 62.50M and PLAN_A-E (full span).
When a span other than full span (PLAN_A-E) is selected, the display shows the center frequency.
To change the center frequency, press FCN to place the keypad in its numeric function. Enter the
desired new center frequency and press F1 (ENTER). If you enter an incorrect digit, do not press
F1. Instead, press F2 (BACK). You can exit the procedure by pressing F3 (ESC) to return to the
original center frequency.
The Spectrum mode can be set to hold the maximum (peak) spectrum data for display. Each time
SPECT is pressed, the Model Two switches between Live and Max modes. MAX appears in the
upper-right corner of the display when this mode is used. The Max hold data is retained as long as
the Model Two is on. To reset the Max hold data in Spectrum Mode, you must select RESET MAX
HOLD in the Measurements Setup menu.
TIP: While in the Spectrum mode, you can use Fast Setup (press SET once) to go directly to
the Measurement Setup parameters, including Reset Max Hold.
You may wish to stop the scanning process so you can study the graph. In the Spectrum screen,
simply press F1 (HOLD). The scan marker stops moving. To resume scanning, press F1 (TRIG).
Other functions are available by using the F3 key to change the function of softkeys F1 and F2.
Press the F3 key to change the function of softkeys F1 and F2 to Scale and Ref. Change the
display scale by pressing softkey F1 (SCALE). Change the reference level by pressing softkey F2
(REF) and using the UP and DOWN arrow keys to change the reference.
Press the F3 key to change the function of softkeys F1 and F2 to Auto and ΔMkr. To set the
reference level and the scale automatically, press F1 (AUTO). The Model Two selects the optimal
scope for your system.
Model Two & Model Two Lite - Operation Manual
52
A Δ Marker function can be used to check the distance (in MHz) and amplitude difference
between any 2 points in the displayed spectrum. First, use the UP and DOWN arrow keys to
move the marker to a reference position, then press F2 (ΔMKR). The UP and DOWN arrow keys
now move the second marker from the reference position, and the Δ Frequency and Δ Level are
displayed.
Press F2 (MARK) to return to the normal single-marker Spectrum display.
Carrier-To-Noise Measurement
The Model Two measures C/N on the last channel selected in Level mode.
To enter the C/N screen, press C/N.
The Model Two measures the C/N difference of the selected channel. First, it measures the Video
Carrier Level of the selected channel. The Video Carrier Level MUST be greater than 25 dBmV
(85 dBμV) for the C/N function to operate.
If the measured Video Carrier is greater than 25 dBmV (85 dBμV), the Model Two displays a
please wait... message prompt. Then, the Model Two measures the noise level away from the
Video Carrier and calculates the C/N ratio of the selected channel. The value of the C/N difference
is displayed on the screen.
If the Video Carrier is shut down as prompted on the display, the Model Two reads the noise in the
measured channel bandwidth and uses this to calculate the C/N ratio for improved accuracy.
The measured channel may be changed by using the UP and DOWN arrow keys.
Model Two & Model Two Lite - Operation Manual
53
Tilt and Favorite Channel
When installing and maintaining your CATV system, you may want to concentrate on the level of
only a few channels and the gain distribution of the transmission line.
You can use the Tilt and Favorite Channel function to display and adjust the level and work status
of your system. You may have up to 12 favorite channels for each User Plan. To enter the Tilt and
Favorite Channel screen, press TILT.
Note: You must have at least four channels selected for the Tilt/Favorite
display to operate.
The Tilt Setup display can be accessed directly by pressing F1 (SETUP). See the Tilt/Level List
Setup section of the Channel Plan Setup menu (see Tilt/Level List on Page 36).
When 4 to 12 channels have been selected for Tilt/Favorite channels, the Tilt screen can be
displayed with a graph of the Video levels for each channel.
The measured levels of the LOWEST and HIGHEST frequencies listed in the Tilt/Favorite list are
used to calculate tilt. These levels and the tilt calculation (Δ) are displayed.
To adjust the reference level, press F2 (REF), then press the UP and DOWN arrow keys. To
change the scale, press F3 (SCALE).
To bring up the list of favorite channels, press TILT again.
The Model Two displays the list of favorite channels with their Video Carrier Levels and the tilt
calculation.
Model Two & Model Two Lite - Operation Manual
54
Battery and Trunk Voltage Measurement
The Model Two is equipped with a built-in voltmeter that can be used to troubleshoot problems
with power supplies or power drops. The Model Two accommodates AC or DC voltages up to
100 Volts. To enter the Voltage screen, press VOLT.
The Voltage screen displays two bar graphs.
The top bar graph indicates the battery charge of your Model Two. This approximate charge level
and the battery voltage are also displayed numerically. As you use your unit, you can access this
screen to check the remaining battery power.
When the battery charge drops below 10%, the battery symbol flashes in the information line at
the top of the display screen. If the charge drops below 5%, the Model Two shuts off automatically
to protect the battery. (See Battery Charging on Page 20.)
The lower bar graph indicates the AC or DC voltage of the system’s trunk.
The Model Two automatically detects the presence of an AC or DC voltage and displays the
measurement graphically and numerically.
The voltmeter specifications are:
Input Range
1.0 - 100 VDC, 1.2 - 100 VAC
Resolution
0.1 V
Accuracy
+/- 1.0 V
Model Two & Model Two Lite - Operation Manual
55
6
6. Advanced Operation Once you have a general understanding of the Model Two’s basic features, you can try the
advanced features, such as testing for transmission characteristics, auto-testing, saving data, and
printing reports.
Transmission Characteristic Test
The Model Two enables you to test the transmission characteristics (gain and tilt) of your CATV
distribution system. Maintaining proper gain and tilt is a necessary step in ensuring the quality of
signals delivered to your customers.
The Model Two enables you to do this by setting a reference at a known good test point such as
the headend’s output test point or a node’s output test point. This reference can then be compared
to the transmission response at other places in the distribution system to allow proper gain and tilt
adjustments of the distribution system.
To test the transmission characteristics, you first need to enable the Transmission option.
From Spectrum mode, the Measurements Setup menu, including Transmission, can be accessed
quickly with Fast Setup by pressing SET once. With Transmission selected, press F1 to switch
from OFF to ON.
The Model Two asks if you want to replace the zero reference data.
To replace the zero reference data, press F1 (YES). To use the existing Zero Reference level,
press F2 (NO). You can exit this screen by pressing F3 (ESCAPE).
Note: The first time you use the Model Two, you should press F1 to
replace the initial Zero Reference data.
Model Two & Model Two Lite - Operation Manual
56
When you press F1 to replace the Zero Reference data, the Model Two prompts you to connect
the unit to the cable system.
After you have connected the CATV source to the Model Two, press F1 (ENTER). The Model Two
scans all video carrier frequencies in the selected Base Channel Plan, including those disabled
for channel scan. (See Channel Plan on Page 31.)
When the Model Two has completed the new Zero Reference scan, a prompt appears to press F1
to start a Relative Spectrum measurement.
Press F1 (ENTER) to start the Relative Spectrum measurement.
Model Two & Model Two Lite - Operation Manual
57
The Model Two displays the transmission measurement. The reference level indicates Δ dB to
show the difference between the current Scan Level and the Zero Reference scan. In the example
above, a 6 dB loss is seen with the transmission measurement.
Note: Channels in the Base Channel Plan that are not active on your
system have a transmission indication near 0 dB, because there was no
signal to be changed. A User Plan can be configured with only active
channels by deleting the unused channels (See Edit User Plan on Page
33.) This provides a transmission scan with all active data.
The new Zero Reference remains in the Model Two’s nonvolatile memory even when the Model
Two is turned off. This enables you to measure the level’s relative change at a later time. To
perform a new Transmission Test at any time, confirm that TRANSMISSION is set to ON in the
Measurement Setup menu and then press SPECT. The Model Two performs a Spectrum Scan
and compares it to the reference data.
Press UP or DOWN to move the marker frequency.
Note: The Span function does NOT operate when the Model Two is in
the TRANSMISSION mode. For normal (absolute value) Spectrum
Measurements, set the TRANSMISSION selection to OFF.
You may wish to stop the scanning process so you can study the transmission graph. Simply press
F1 (HOLD). The scan marker stops moving. To resume scanning, press F1 (TRIG).
As in Spectrum mode (absolute), other functions are available by using the F3 key to change the
function of softkeys F1 and F2.
Press F3 to change the function of softkeys F1 and F2 to Scale and Ref.
Change the display scale by pressing softkey F1 (SCALE). Change the reference level by
pressing softkey F2 (REF) and using the UP and DOWN arrow keys to change the reference.
Model Two & Model Two Lite - Operation Manual
58
Press the F3 key to change the function of softkeys F1 and F2 to Auto and ΔMkr. To set the
reference level and the scale automatically, press F1 (AUTO).
A Δ MARKER function can be used to check the distance (in MHz) and amplitude difference
between any 2 points in the displayed transmission spectrum. First, use the UP and DOWN arrow
keys to move the marker to a reference position, then press F2 (ΔMKR). The UP and DOWN
arrow keys now move the second marker from the reference position, and the Δ Frequency and Δ
Level are displayed.
Press F2 (MARK) to return to the normal single-marker Transmission display.
The new Zero Reference Scan remains in the Model Two so you can measure the relative change
at a later time. To perform another Transmission Test at any time, confirm that Transmission is set
to ON and press SPECT. The Model Two performs a Spectrum Scan and compares it to the
reference data.
If Transmission has been turned off for absolute Spectrum Measurements, you can turn it on and
press F2 (NO) when asked to replace the Zero Reference data.
The Model Two then prompts you to select F1 to start a relative Spectrum Measurement with the
old Zero Reference data.
Model Two & Model Two Lite - Operation Manual
59
Auto Test
The Model Two can accept user-defined testing programs to automatically perform Level,
Spectrum, Tilt (Favorite), and Limit tests in specified time increments. The Model Two can store
up to 7 user programs for recall when needed. The test results are stored to a file automatically
and may be printed automatically after measurement or they can be viewed, printed, or uploaded
to a PC later.
If you wish to have Auto Test measurements printed automatically after each test time sequence,
you must have the AUTO TEST PRINT feature enabled in the Print Setup menu. Also, you must
have the printer connected and the correct printer selected in Printer Setup.
TIP: With Fast Setup, you can access the Print Setup menu directly from Auto Test by pressing
SET once.
To set up an Auto Test, press AUTO. The Auto Test program directory appears.
If existing programs are listed, press the Down arrow key until a blank selection is highlighted.
If the directory has no programs, the blank selection appears automatically.
Model Two & Model Two Lite - Operation Manual
60
Press the F1 (NEW) key.
The Auto Test screen for STEP 1 appears.
Press F1 (NAME) for the alphanumeric entry window to appear.
Enter up to 5 alphanumeric characters for the program name and press F1 (ENTER). (See
Navigating Functions on Page 17 if you need help with alphanumeric entry.)
The new program name appears on the screen for Step 1.
Model Two & Model Two Lite - Operation Manual
61
Press F2 (NEXT) to continue.
The Auto Test screen for STEP 2 appears.
Four types of tests may be performed in a program: Level, Spectrum, Limit, and Tilt. Each enabled
test has a checkmark next to it.
Use the UP and DOWN arrow keys to highlight any test, then press F1 (ENTER) to enable or
disable the test.
When only the desired tests are enabled with a checkmark, press F2 (NEXT) to continue.
The Auto Test screen for STEP 3 appears.
You can change the parameters for each of the selected tests by using the UP and DOWN arrow
keys to highlight the test, then press F1 (ENTER).
The Auto Test parameter displays are described in the following section:
Model Two & Model Two Lite - Operation Manual
62
Level Parameters
Use the UP and DOWN arrow keys to highlight any channel in the selected user plan, then
press F1 (ENTER) to enable or disable the channel for the Level Test. An enabled channel
displays a checkmark next to it.
Note: There are no default channels enabled for the Level Test
parameter. If Level Test is selected for the Auto Test program, you must
enable one or more channels.
When all desired channels are enabled, press F3 (BACK) to return to the Auto Test screen for
STEP 3.
Spectrum Parameters
Press F1 (ENTER) to change the highlighted Spectrum test bandwidth to 2.50 MHz, 6.25 MHz,
12.50 MHz, 25.00 MHz, 62.50 MHz, or a full-spectrum scan of the User Plan Base Channel
Plan.
Use the UP and DOWN arrow keys to highlight the center frequency selection for the Spectrum
test. Press the FCN key, enter the center frequency numerically in MHz, and press F1
(ENTER). This parameter is not used if the full-span bandwidth is selected.
When the desired frequency and bandwidth have been set, press F3 (BACK) to return to the
Auto Test screen for STEP 3.
Model Two & Model Two Lite - Operation Manual
63
Limit Parameters
The status of all Limit Test parameters are displayed (except the 24 HR Deviation limit
parameter for 24 HR tests). The enabled limits for testing are also indicated by a checkmark. If
the current settings are acceptable, you can press F3 (BACK) to return to the Auto Test screen
for STEP 3.
If you wish to change or (disable) any Limit parameter, you can press F1 (ENTER) to display
the Edit Limits screen. All Limit parameters may be changed as described in Model Two
Setup for the Edit Limits display. (See Limit Setup on Page 29.) When the desired changes
have been made in the Edit Limits screen, select SAVE AND EXIT to return to the Auto Test
Limit Parameter screen.
If the settings displayed on the Limit Parameter screen are correct, press F3 (BACK) to return
to the Auto Test screen for STEP 3.
Model Two & Model Two Lite - Operation Manual
64
Tilt Parameters
The Tilt Parameter screen for Auto Test is the same as the standard Tilt Setup screen. All Tilt
channels already selected for the User Plan are enabled here.
You can use the UP and DOWN arrow keys to highlight any channel in the selected User Plan,
then press F1 (ENTER) to enable or disable the channel for the Tilt test. An enabled channel
displays a checkmark next to it and will be listed in the Tilt Channel boxes at the bottom of the
display. At least 4 of the 12 maximum number of Tilt channels must be selected for Tilt to
operate.
When the desired TILT channels have been selected, press F3 (BACK) to return to the Auto
Test screen for STEP 3.
Model Two & Model Two Lite - Operation Manual
65
When the parameters for all selected tests have been verified or changed, press F2 (NEXT) to
continue. The Auto Test screen for STEP 4 appears.
If you wish this Auto Test program to perform its test sequence only once each time it is
started, you can press F1 (START) to immediately begin execution of the testing program. If
F1 is selected to start the program, the Model Two performs the selected tests and then shuts
off.
A file containing all test records is created and automatically saved. The filename is the Auto
Test program name followed by an asterisk (*) to indicate that it is a single Auto Test file. This
is displayed in the Model Two file directory along with the date and time. (See File Saving,
Viewing, and Printing later in this chapter.)
If you wish to save the Auto Test program for later use without running the entire program now,
you can start the test and then press F1 to exit.
Note: A new Auto Test program that is started as a single test sequence
(no 24 HR test) has default settings for 24 HR operation (6 Hours, 5
Tests) stored with the program. When this program is executed again, it
can run as a single test sequence or as a 24 HR test with the default
settings.
Model Two & Model Two Lite - Operation Manual
66
If you wish the Auto Test program to perform its test sequence in programmed time intervals,
press F2 to setup the 24 HR Measurement routine.
The Auto Test screen for STEP 5 appears.
A default time interval of 6 hours between test times is displayed. To change the time interval,
press FCN, enter a new number from 1 to 23 (hours), and press F1 to enter.
Press F2 (NEXT) to continue. The Auto Test screen for STEP 6 appears.
A default number of 5 test times is displayed. To change the number of test times, press FCN,
enter a new number from 1 to 10 (times), and press F1 to enter.
Note: Since the first Auto Test time is always performed immediately
upon starting the program, the 5 default test times provides a 24 Hour
span from first test to last test, with a 6-hour default time interval between
test sequences.
Model Two & Model Two Lite - Operation Manual
67
Press F1 (START) to begin execution of the testing program. The Model Two immediately
performs the first sequence of tests. After each test time sequence is complete, an Auto Test
program status screen appears for a short time, then the Model Two shuts off.
If the Model Two is turned on during an Auto Test program, the program status screen appears
to indicate the Auto Test status. The program may be stopped by pressing F1 (STOP).
A file containing all test records is created for each test time and automatically saved. The
filename is the Auto Test program name followed by an alphabetical assignment (beginning
with A) for each test time file to indicate they are 24HR Auto Test files. This is displayed in the
Model Two file directory along with the date and time. (See File Saving, Viewing, and Printing
later in this chapter.)
Note: If a Limit Test is part of a 24 HR Auto Test program, a 24 Hour
Video Deviation report (Rep_24) is also created and saved after the last
test sequence. This data record lists the maximum video deviation over
all time tests for each channel along with a Pass (P) or Fail (F) indication
for the channel based on the Limit Test parameter setup at the time the
Auto Test was performed.
Model Two & Model Two Lite - Operation Manual
68
If you wish to save the Auto Test program for later use without running the entire program now,
you can start the test and then press F1 to exit.
The new Auto Test program is added to the Auto Test directory with the program name entered
in Step 1.
Up to 7 Auto Test programs may be created and saved. From the Auto Test directory, a
program may be deleted by using the UP and DOWN arrow keys to highlight the program
name and pressing F2 (DEL).
Also, information about an existing file may be obtained by using the UP and DOWN arrow
keys to highlight the program name and pressing F3 (INFO).
Parameters for each test may be viewed by using the UP and DOWN arrow keys to highlight
the test and pressing F1 (ENTER) to view the setup parameters. Also, the status of the 24 HR
setup can be seen by pressing F2 to view the Test Times and Time Intervals.
Model Two & Model Two Lite - Operation Manual
69
File Saving, Viewing, and Printing
The Model Two can save records from Level, Tilt (Favorite Channels group), Spectrum, Scan, or
Limit Test measurements either to individual files or all to one file. Auto Test files are automatically
saved. These files can be recalled to display the recorded data and Scan, Spectrum, and Limit
graphics can be viewed. All files may also be printed from the Model two or uploaded to a PC.
Saving a Test Record to a File
Before saving a record, be sure the time, date, and date sequence (M/D/Y) has been set. (See
Date & Time on Page 24.) If the date sequence is changed after storing files, the date
information for those files will not be correct.
To save a test record, press FILE. The Model Two File directory appears with the filename,
date, and time of all existing files.
Press F1 (NEW) to create a new file. A SAVE CONTENT screen appears with a list of test
records that are available to be saved.
Model Two & Model Two Lite - Operation Manual
70
If a test has not been performed by the Model Two, it is not displayed on the SAVE CONTENT
screen.
Use F2 or F3 to scroll to any listed test selection, then use the UP and DOWN arrow keys to
turn ON or OFF the records that will be saved to the file. Any or all of the listed records may be
saved to one file.
When only the desired test records are enabled (ON), press F1 (OK) to continue.
The alphanumeric entry window appears to enter the desired filename.
Enter up to 5 alphanumeric characters for the filename and press F1 (ENTER).
(See Entering Alphanumeric Characters on Page 17.)
The File directory is displayed with the new filename at the end of the file list.
Model Two & Model Two Lite - Operation Manual
71
Viewing and Printing File Records
To recall (load) a test record file, press FILE.
The Model Two File directory appears with the filename, date, and time of all existing files.
Use the UP and DOWN arrow keys to scroll to the filename of the file you wish to view or print,
then press F3 (LOAD).
The FILE CONTENT screen appears with the filename, User Plan, and a list of all test records
in the file.
Use the UP and DOWN arrow keys to scroll to the test record that you wish to list the data
record, view graphically (Limit, Spectrum, and Scan records only), or to print.
To LIST the data for a test record, press F1 (LIST):
Model Two & Model Two Lite - Operation Manual
72
Limit Test - This data record is listed with the number of channels failed for individual Channel
Test parameters displayed at the top of the screen. Use F2 or F3 to scroll to any channel to
see the Video level and Pass (checkmark) or Fail (X) indication.
Note: The Pass or Fail indication for the Limit Test is based on the Limit
Test parameter setup at the time the Limit Test was performed. A digital
(DIGI) type Channel Measurement during the Limit Test is shown but is
not used to determine Pass or Fail for any of the tests.
Tilt Test - This data record is listed with the Tilt Level displayed at the top of the screen. Use
F2 or F3 to scroll to any Tilt/Favorite channel to see the Video level.
Spectrum Test - This data record lists the frequency and signal level for each data point in the
Spectrum test. Use F2 or F3 to scroll to any listed frequency in the Spectrum scan.
Scan test - This data record lists all Video and (first) Audio levels for each channel in the Scan
test. Use F2 or F3 to scroll to any channel.
Level Test - This data record lists all Video and (first) Audio levels for each channel in the
Level test. Use F2 or F3 to scroll to any channel.
TIP: On any listed record, you can use the UP and DOWN arrow keys to scroll through the
channel list (data points for Spectrum test) by one page (8 channels) at a time.
Note: If DUAL Audio channels are used, only the first Audio level is listed
for Scan and Level Tests. Both Audio levels are displayed on printouts or
uploads to a PC.
While displaying a list of any data record, you can press F1 (BACK) to return to the FILE
CONTENT screen.
Model Two & Model Two Lite - Operation Manual
73
To VIEW the Limit, Spectrum, or Scan test record graphically from the FILE CONTENT screen,
press F2 (VIEW):
Limit Test - A view of the Limit test scan is displayed. The display may be controlled like a
Live Channel Scan. The UP and DOWN arrow keys move the marker. F1 (AUTO)
automatically sets the Scale and Reference. F2 (TRIG) changes the display to a Live Channel
scan instead of the file record display. You can also press F3 to change the softkey functions of
F1 and F2 to set the Scale and Reference manually.
Spectrum Test - A view of the Spectrum scan is displayed. The display may be controlled like
a Live Spectrum Scan. The UP and DOWN arrow keys move the marker. F1 (TRIG) changes
the display to a Live Spectrum scan instead of the file record display. F2 (SPAN) does not
operate with the Spectrum record file. If F1 is used to trigger a Live Spectrum scan, then F2
(SPAN) may be used. You can also press F3 to change the softkey functions of F1 and F2 to
set the Scale and Reference manually or use the Auto scale and Reference or the Δ Marker
function.
Scan Test - A view of the Channel Scan test is displayed. The display may be controlled like a
Live Channel Scan. The UP and DOWN arrow keys move the marker. F1 (AUTO)
automatically sets the Scale and Reference. F2 (TRIG) changes the display to a Live Channel
scan instead of the file record display. You can also press F3 to change the softkey functions of
F1 and F2 to set the Scale and Reference manually.
Note: The view of file records (F2) operates with Limit, Spectrum, and
Scan records only. The View function does not operate with Level and Tilt
records.
While viewing a data record, you can press FILE to return to the FILE CONTENT screen.
Pressing FILE again will return you to the File Directory.
Model Two & Model Two Lite - Operation Manual
74
To PRINT a test record from the FILE CONTENT screen:
CAUTION: Before printing a test record, you must first have the correct
printer selected in the setup menu. (See Print Setup on Page 25.)
TIP: With Fast Setup, you can access the Print Setup menu directly from the FILE
CONTENT screen by pressing SET once.
Also, refer to Printer Connection in the next section for instructions on connecting your printer
to the Model Two.
When the Printer has been connected and the proper printer selected in Printer Setup, you
can print a selected test record from the FILE CONTENT screen by pressing F3 (PRINT).
Limit Test - This data record is printed with Video and Audio levels for each channel along
with a Pass (P) or Fail (F) indication for the channel. This report also shows which Individual
channel test parameters have failed. The listed data is followed by a graphic printout of the
Limit test scan. The total number of channels scanned and the number of channels that have
failed are shown at the bottom of the report.
Note: The Pass or Fail indication for the Limit Test is based on the Limit
Test parameter setup at the time the Limit Test was performed. A digital
(DIGI) type channel measurement during the Limit Test is shown but is not
used to determine Pass or Fail for any of the tests.
Tilt Test - This data record is printed with the Video levels for each Tilt/Favorite channel. The
listed data is followed by a graphic printout of the Tilt levels. The lowest and highest frequency
levels and the Tilt calculation are shown at the bottom of the report.
Spectrum Test - This data record is printed with the frequency and signal level for each data
point in the Spectrum test. The listed data is followed by a graphic printout of the Spectrum
scan. The minimum and maximum levels in the Spectrum scan are shown at the bottom of the
report.
Scan test - This data record is printed with Video and Audio levels for each channel. The
listed data is followed by a graphic printout of the Channel scan. The channels with minimum
and maximum Video levels are shown at the bottom of the report.
Model Two & Model Two Lite - Operation Manual
75
Level Test - This data record lists all Video and Audio levels for each channel in the Level
record.
All printed records contain information about the Model Two (serial number, memory space,
battery voltage, and internal temperature) along with information about the record itself (User
Plan, Base Plan, Filename, Save Date, and Save Time) as well as Print Date and Print Time.
You may print all records in a file with one print command by selecting PRINT ALL in the Print
Setup menu. (See Print Setup on Page 25.) Remember, with Fast Setup, you can access the
Print Setup menu directly from the FILE CONTENT screen by pressing SET once. With PRINT
ALL selected, all records in a file are printed regardless of which record is highlighted.
Note: When PRINT ALL is selected, the printout has a single title called
Report followed by all printed records in the file. When PRINT ALL is not
selected, each printed record has a specific title (Level Report, Tilt
Report, etc).
When using a parallel printer with the Model Two printer adapter, you must wait a few minutes
between pages for the data to be loaded into the printer before the page is printed.
Auto Test Records
Auto Test records are stored automatically. (See Auto Test on Page 60.) These records also
appear in the File directory:
Model Two & Model Two Lite - Operation Manual
76
A file for 24 HR Auto Test records is created for each Auto Test time. The filename is the Auto
Test program name followed by an alphabetical assignment (beginning with A) for each test
time file to indicate they are 24 HR Auto Test files. This is shown in the directory above for an
Auto Test program named TEST1. The suffix A-E for each test time file was added
automatically.
A file containing all test records for an immediate Auto Test (not 24 HR test) is created and
automatically saved. The filename is the Auto Test program name followed by an asterisk (*) to
indicate that it is a single Auto Test file. This is shown in the directory above for an Auto Test
program named TEST2. The suffix (*) for this file was added automatically.
Auto Test files may contain Level, Tilt, Spectrum, or Limit test records. These files may be
listed, viewed, or printed in the same manner as described above for manually saved files.
Note: If a Limit Test is part of a 24HR Auto Test program, a 24 Hour
Video Deviation report (Rep_24) is also created and saved after the last
test sequence. This data record lists the maximum Video deviation over
all time tests for each channel along with a Pass (P) or Fail (F) indication
for the channel based on the Limit Test parameter setup at the time the
Auto Test was performed.
Model Two & Model Two Lite - Operation Manual
77
Printer Connection
The Model Two can print file records to a serial or parallel printer. (See File Saving, Viewing, and
Printing on Page 70.)
For connecting the Model Two to a serial printer, you need a special cable. For connection to a
parallel printer, you need a data cable and adapter. The required cable or adapter is listed in the
following connection procedures for each type of printer.
For all printer connections, the required printer cable is connected to the PC/Printer Interface on
the bottom of your Model Two. The other end is connected per the following instructions for serial
and parallel printers.
PC / Printer Interface
Model Two & Model Two Lite - Operation Manual
78
Serial Printer
To connect to a serial printer (such as an Epson LX-300), you need the following:
•
Model Two Serial Printer Cable, P/N 2071352000
(5-pin circular connector to 25-pin D-sub-male connector cable)
Connect the 5-pin circular end to the Model Two and the 25-pin connector to the serial printer.
25-Pin Connector to
Serial Printer
5-Pin Data Cable
Circular Connector
to Model Two
Model Two & Model Two Lite - Operation Manual
79
Parallel Printer
To connect to a parallel printer (such as an HP LaserJet), you need the following:
•
Model Two Data Cable, P/N 2071351000 (5-pin circular connector to 9-pin D-subfemale connector cable)
Note: The 2071351000 Data Cable is included with Toolbox II PC
Software.
•
Model Two Parallel Printer Adapter, P/N 0440214000
(9-pin D-sub-male to 25-pin D-sub-female adapter)
Connect the data cable’s 5-pin circular end to the Model Two and the 9-pin connector to the 9pin connection of the parallel printer adapter. Then connect the 25-pin connection of the
parallel printer adapter to the 25-pin connector on your standard parallel printer cable
connected to your printer.
5-Pin Data Cable
Circular Connector
to Model Two
9-Pin Data Cable
Connector to
9-Pin Parallel Printer
25-Pin Parallel Printer
Adaptor Connection to
Printer Cable
Model Two & Model Two Lite - Operation Manual
80
7
7. Specifications Frequency:
Range:
Accuracy:
Resolution:
Channel Type:
Analog TV:
Digital TV:
FM channel:
Dual Audio Channels
Level Measurement:
Range:
5 MHz - 870 MHz
+/- 50 ppm (20 °C +/-5 °C)
10 kHz
TV
QAM, QPSK
Single Frequency
30 dBμV - 120 dBμV
(-30 dBmV to 60 dBmV)
Accuracy:
LEVEL:
Resolution:
Input Impedance:
Channel Scan:
Number of Channels:
Scanning speed:
Scale:
Zoom:
(> 35 dBμV or -25 dBmV)
+/-1.5 dB (10°C to 30°C)
+/-3 dB (-10°C to 40°C)
+/-2 dB (10°C to 30°C)
SCAN:
0.1 dB
75 Ohms (unbalanced, BNC or F type connector)
150 channels max.
2.75 channels / sec
1,2,5,10 dB/div
1X, 2X, 3X, 4X, 5X five levels of magnification or
full Channel Plan scan.
Frequency spectrum:
Bandwidth:
Scale:
2.5 MHz, 6.25 MHz, 12.5 MHz, 25 MHz, 62.5 MHz, and full span
1,2,5,10 dB/div
Carrier-noise ratio (C/N):
Input range:
Range:
Accuracy:
Resolution:
Over 85 dBμV (25 dBmV)
20 - 50 dB max.(depending on input level)
+/-2 dB
0.1 dB
Digital Channel (Average) Power:
Bandwidth:
0.28~9.99 MHz
Center Frequency:
5 MHz (plus ½ channel bandwidth) to 870 MHz
(minus ½ channel bandwidth)
Digital modulation:
QAM, QPSK
Model Two & Model Two Lite - Operation Manual
81
Tilt measurement:
Number of channels:
Resolution:
4 - 12
0.1 dB
Limit Test Parameters:
Any of the following may be enabled:
Min video:
40 - 119 dBμV (-20 to 59 dBmV)
Max video:
41 - 120 dBμV (-19 to 60 dBmV)
Max Δ video:
2 - 30 dB
Min Δ V/A:
0 - 15 dB
Max Δ V/A:
5 - 30 dB
Max Δ ADJ:
0 - 20 dB
24HR Video Dev.:
0 - 20 dB
Auto Test:
Number Of Programs:
7 (Max)
Tests:
Level, Tilt, Spectrum, Limit, and 24HR Video Dev. (any or all tests may
be used in an Auto Test program)
Time Intervals:
1 to 23 hours
Test Times:
1 to 10 times
Trunk Voltage measurement:
Input range:
1.2 - 100 VAC, 1.0 - 100 VDC
Accuracy:
+/-1 V
Resolution
0.1 V
Others:
Storage:
Communication Port:
Printer:
Audio Output:
Dimensions:
Weight:
Display:
Power Supply:
Battery:
Charger:
Work Time:
Charge Time:
32 Kilobytes memory
Up to 35 complete Scan files (150 channels max.) or 25 complete
Limit Test files (150 channels max.). Less if other files (Level, Tilt,
Spectrum) are saved.
RS 232C
Canon, Epson, and HP
Built-in speaker
218 mm x 95 mm x 49 mm (excluding belt clip and RF connector)
1.45 lbs (658 gm)
128 x 128 LCD with backlight
3.6 V / 3.5 AH Ni-MH battery
* AC 100 - 240 V, 50/60 Hz, 1.8 A 7 VDC (max)
* Only the Trilithic Charger (P/N 0610165000) with internal charging
circuitry may be used.
Average 6-8 hours (fully charged battery)
Less than 3 hours
Model Two & Model Two Lite - Operation Manual
82
Warranty Information
Trilithic, Inc. warrants that each part of this product will be free from defects in materials and
workmanship, under normal use, operating conditions and service for a period of two (2) years
from date of delivery. Trilithic, Inc.’s obligation under this Warranty shall be limited, at Trilithic,
Inc.’s sole option, to replacing the product, or to replacing or reporting any defective part, F.O.B.
Indianapolis, Indiana; provided that the Buyer shall give Trilithic, Inc. written notice.
Batteries are not included or covered by this Warranty.
The remedy set forth herein shall be the only remedy available to the Buyer under this Warranty
and in no event shall Trilithic, Inc. be liable for incidental or consequential damages for any alleged
breach of this Warranty. This Warranty shall not apply to any part of the product which, without fault
of Trilithic, Inc., has been subject to alteration, failure caused by a part not supplied by Trilithic, Inc.,
accident, fire or other casualty, negligence or misuse, or to any cause whatsoever other than as a
result of a defect.
Except for the warranty and exclusions set forth above, and the warranties, if any, available to the
Buyer from those who supply Trilithic, Inc., there are no warranties, expressed or implied (including
without limitation, any implied warranties of merchantability of fitness), with respect to the
condition of the product or its suitability for any use intended for it by the Buyer or by the purchaser
from the Buyer.
Model Two & Model Two Lite - Operation Manual
83
9710 Park Davis Drive
Indianapolis, IN 46235
(317) 895-3600
www.trilithic.com
P/N 0010229001
2/07
Made in U.S.A.
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertising