The Spectrum Master User Guide is part of a set of manuals that cover all of the instrument
functions and their use. This manual covers the instrument overview, system functions, and
other common features, along with a brief guide to basic measurement concepts and setups.
Most instrument operations and modes are covered in specific measurement guides as listed
below.
Additional Documentation
Document Part NumberDescription (Required Option)
10100-00065Important Product Information, Compliance, and Safety Notices
Read the Handheld Instruments Product Information, Compliance, and Safety Guide
(PN: 10100-00065) for important safety, legal, and regulatory notices before operating the
equipment. For additional information and literature covering your product, visit the product
page of your instrument and select the Library tab:
To contact Anritsu, visit the following URL and select the services in your region:
http://www.anritsu.com/contact-us
1-2Instrument Description
The Spectrum Master is a synthesizer-based handheld spectrum analyzer that provides quick
and accurate measurement results. The instrument is designed for monitoring, measuring,
and analyzing signal environments. Measurements can easily be made by using the main
instrument functions: frequency, span, amplitude, and bandwidth. Dedicated keys for
common functions and a familiar calculator-type keypad are available for fast data entry.
Typical measurements include: in-band interference and transmit spectrum analysis, plus
cell site and 802.11a/b/g interference testing. Options are available for RF, advanced
demodulation, and over-the-air (OTA) measurement. A full range of marker capabilities (such
as peak, center, and delta functions) are provided for faster, more comprehensive analysis of
displayed signals. Upper and lower multi-segmented limit lines are available to create quick,
simple pass/fail measurements. A menu option provides for an audible alert when a limit
value is exceeded.
The bright daylight-viewable, high-resolution, color liquid crystal display (LCD) provides
easy viewing in a variety of lighting conditions. The Spectrum Master is capable of up to
3 hours of continuous operation from a fully charged battery and can be operated from a
12 VDC source, which simultaneously charges the battery.
The combination of a touch screen and keypad enables users to navigate menus with the
touch screen and enter numbers with the keypad.
Time and date stamping of measurement data is automatic. The internal memory provides
for the storage and recall of up to 1000 measurement setups and up to 1000 traces.
Measurements and setups can be stored in a USB flash drive or transferred to a PC by using
the included USB cable.
Not all after-market USB drives are compatible with the Spectrum Master. Many
drives come with a second partition that contains proprietary firmware. This
Note
partition must be removed. Only one partition is allowed. Refer to the individual
manufacturer for instructions on how to remove it. You may also try reformatting a
drive that contains a single partition using FAT32 format.
1-2PN: 10580-00340 Rev. NMS2720T UG
General Information1-2 Instrument Description
Available Models
Table 1-1 lists the frequency options available with the Spectrum Master MS2720T.
Table 1-1.Spectrum Master Frequency Options
Model Frequency Range
MS2720T-0709Spectrum Analyzer, 9 kHz to 9 GHz
MS2720T-0713Spectrum Analyzer, 9 kHz to 13 GHz
MS2720T-0720Spectrum Analyzer, 9 kHz to 20 GHz
MS2720T-0732Spectrum Analyzer, 9 kHz to 32 GHz
MS2720T-0743Spectrum Analyzer, 9 kHz to 43 GHz
MS2720T-08099 GHz Tracking Generator
MS2720T-081313 GHz Tracking Generator
MS2720T-082020 GHz Tracking Generator
a. Tracking Generator frequency must match instrument hardware frequency option. For example,
MS2720T-0813 is an option for MS2720T-0713.
a
a
a
MS2720T UGPN: 10580-00340 Rev. N1-3
1-2 Instrument DescriptionGeneral Information
Available Options
Available options for the Spectrum Master are listed in Table 1-2.
Tab le 1-2.Available Options
OptionDescription
MS2720T-0007Secure Data Operation
MS2720T-0009I/Q Demodulation Hardware
MS2720T-0019High Accuracy Power Meter (requires USB Power Sensor)
MS2720T-0098Standard Calibration to ISO17025 and ANSI/NCSL Z540-1. Includes
calibration certificate.
MS2720T-0099Premium Calibration to ISO17025 and ANSI/NCSL Z540-1. Includes
calibration certificate, test report, and uncertainty data.
1-4PN: 10580-00340 Rev. NMS2720T UG
General Information1-3 Calibration and Verification
1-3Calibration and Verification
Anritsu recommends annual calibration and performance verification by local Anritsu service
centers. The Spectrum Master is self-calibrating and there are no field-adjustable
components. Contact information for Anritsu Service Centers is available at:
http://www.anritsu.com/contact-us.
1-4Instrument Care and Preventive Maintenance
Instrument care and preventive maintenance consist of cleaning the unit and inspecting and
cleaning the RF connectors and all accessories. Clean the instrument with a soft, lint-free
cloth dampened with water or water and a mild cleaning solution.
CautionTo avoid damaging the display or case, do not use solvents or abrasive cleaners.
Connector Care
Clean the RF connectors and center pins with a cotton swab dampened with denatured
alcohol. Visually inspect the connectors. The fingers of the N(f) connectors and the pins of the
N(m) connectors should be unbroken and uniform in appearance. If you are unsure whether
the connectors are undamaged, gauge the connectors to confirm that the dimensions are
correct. Visually inspect the test port cable(s). The test port cable should be uniform in
appearance, and not stretched, kinked, dented, or broken.
To prevent damage to your instrument, do not use pliers or a plain wrench to tighten the
Type-N connectors. The recommended torque is 12 lbf·in to 15 lbf· in (1.36 N ·m to 1.70 N·m).
Inadequate torque settings can affect measurement accuracy. Over-tightening connectors can
damage the cable, the connector, the instrument, or all of these items.
Visually inspect connectors for general wear, cleanliness, and for damage such as bent pins or
connector rings. Repair or replace damaged connectors immediately. Dirty connectors can
limit the accuracy of your measurements. Damaged connectors can harm the instrument.
Connection of cables carrying an electrostatic potential, excess power, or excess voltage can
damage the connector, the instrument, or both.
Connecting Procedure
1. Carefully align the connectors. The male connector center pin must slip concentrically
into the contact fingers of the female connector.
2. Push connectors straight together. Do not twist or screw them together. A slight
resistance can usually be felt as the center conductors mate.
3. To tighten, turn the connector nut, not the connector body. Major damage can occur to
the center conductor and to the outer conductor if the connector body is twisted.
4. If you use a torque wrench, initially tighten by hand so that approximately 1/8 turn or
45 degrees of rotation remains for the final tightening with the torque wrench.
Relieve any side pressure on the connection (such as from long or heavy cables) in order
to assure consistent torque. Use an open-end wrench to keep the connector body from
turning while tightening with the torque wrench.
Do not over-torque the connector.
MS2720T UGPN: 10580-00340 Rev. N1-5
1-4 Instrument Care and Preventive MaintenanceGeneral Information
Disconnecting Procedure
1. If a wrench is needed, use an open-end wrench to keep the connector body from turning
while loosening with a second wrench.
2. Complete the disconnection by hand, turning only the connector nut.
3. Pull the connectors straight apart without twisting or bending.
ESD Caution
The Spectrum Master, like other high performance instruments, is susceptible to electrostatic
discharge (ESD) damage. Coaxial cables and antennas often build up a static charge, which
(if allowed to discharge by connecting directly to the instrument without discharging the
static charge) may damage the Spectrum Master input circuitry. Instrument operators must
be aware of the potential for ESD damage and take all necessary precautions.
Operators should exercise practices outlined within industry standards such as JEDEC-625
(EIA-625), MIL-HDBK-263, and MIL-STD-1686, which pertain to ESD and ESDS devices,
equipment, and practices. Because these apply to the Spectrum Master, it is recommended
that any static charges that may be present be dissipated before connecting coaxial cables or
antennas to the instrument. This may be as simple as temporarily attaching a short or load
device to the cable or antenna prior to attaching to the Spectrum Master. It is important to
remember that the operator may also carry a static charge that can cause damage. Following
the practices outlined in the above standards will ensure a safe environment for both
personnel and equipment.
RF Input Warning
The Anritsu Spectrum Master is a sensitive measuring instrument designed to measure low
power levels. Avoid damaging this sensitive circuitry by observing the maximum input levels
printed on the instrument connector labeling and specified in the product technical data
sheet.
Typical maximum input is +23 dBm (±50 VDC) and could be less if additional features, such
as a preamplifier, are in use. Be sure to review the product technical data sheet or Anritsu
website for recommended components and accessories that can help you protect your
instrument. These include a variety of adapters, attenuators, filters, and RF power detection
accessories.
1-6PN: 10580-00340 Rev. NMS2720T UG
General Information1-4 Instrument Care and Preventive Maintenance
Battery
Compartment
Door
Battery Replacement
The battery can be replaced without the use of tools. The battery compartment door is located
on the lower left side of the instrument (when you are facing the measurement display). To
remove the battery:
1. Push down on the battery door tab to disengage it.
2. Remove the battery door.
3. Pull straight out on the lanyard to remove the battery pack from the instrument.
When inserting the battery, the battery label should face up and the end where the
Note
battery contacts are located slides in first. If the battery door does not close tightly,
the battery may be inserted incorrectly.
Figure 1-1.Battery Compartment Door
The battery that is supplied with the Spectrum Master may need charging before use. The
battery can be charged while it is installed in the Spectrum Master by using either the
AC-DC Adapter, or outside the Spectrum Master with the optional Dual Battery Charger.
Refer to “Symbols and Indicators” on page 2-12 for a description of battery symbols.
Note
Caution
t
Use only Anritsu Company approved batteries, adapters, and chargers with this
instrument. Anritsu recommends removing the battery for long-term storage of the
instrument.
When using the Automotive Power Adapter, always verify that the supply is rated
for a minimum of 60 Watts @ 12 VDC, and that the socket is clear of any dirt or
debris. If the adapter plug becomes hot to the touch during operation, discontinue
use immediately.
MS2720T UGPN: 10580-00340 Rev. N1-7
1-4 Instrument Care and Preventive MaintenanceGeneral Information
1-8PN: 10580-00340 Rev. NMS2720T UG
Chapter 2 — Instrument Overview
2-1Introduction
This chapter provides an overview of the Anritsu Spectrum Master. It describes the
instrument front panel, touch screen display, and the connector panel. For detailed
information on the instrument’s test and measurement functions, refer to one of the Anritsu
user documents listed in Appendix A, “Related Documents”.
2-2Turning On the Spectrum Master
The Anritsu Spectrum Master is capable of approximately three hours of continuous
operation from a fully charged, field-replaceable battery (refer to “Battery Replacement”
on page 1-7). The instrument can also be operated from a 12 VDC source (which will
simultaneously charge the battery). This can be achieved with either the Anritsu AC-DC
Adapter or the Automotive Power Adapter. Both items are included as standard accessories
with the Spectrum Master. Refer to the instrument Technical Data Sheet.
When using the Automotive Power Adapter, always verify that the supply is rated
Caution
for a minimum of 60 Watts @ 12 VDC, and that the socket is clear of any dirt or
debris. If the adapter plug becomes hot to the touch during operation, discontinue
use immediately.
To turn on the MS2720T, press the green On/Off button on the front panel (see Figure 2-1
on page 2-2).
The
Spectrum Master takes approximately 60 seconds to complete power-up and to load the
application software. At the completion of this process, the instrument is ready for use.
Note
Keep the fan inlet and exhaust ports clear of obstructions at all times for proper
ventilation and cooling of the instrument.
MS2720T UGPN: 10580-00340 Rev. N2-1
2-3 Instrument Front PanelInstrument Overview
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2-3Instrument Front Panel
The Spectrum Master uses a touch screen and keypad for data input. The five bottom menu
keys and up to eight submenu keys on the right side of the display are touch screen keys. The
menu and submenu keys vary depending on the current measurement mode, installed
options, and instrument function selected.
Figure 2-1.Front Panel Overview
1.Connector Panel
2.Fan Exhaust Port
3.Submenu Keys (Active Menu or Active Function Block)
4.Menu Button
5.Power LED and Battery Charge LED
6.On/Off Button
7.Enter Key and Arrow Keys
8.Rotary Knob
9.Number Keypad (includes Shift and Esc)
10. Fan Inlet Port
11. Measurement Display or Sweep Window
12. Main Menu Keys
13. Fan Exhaust Port
2-2PN: 10580-00340 Rev. NMS2720T UG
Instrument Overview2-3 Instrument Front Panel
LED Indicators
Power LED
The Power LED is located on the left of the On/Off button. The LED is solid green when the
instrument is on, and blinks slowly when the unit is off but is connected to an external power
source.
Charge LED
The Charge LED is located on the right of the On/Off button. The LED blinks slowly when the
battery is charging and is solid green when the battery is fully charged.
Front Panel Keys
The numeric keypad, rotary knob, and the four arrow keys can all be used to change the value
of the currently selected parameter.
Numeric Keypad
Keys 0 through 9 are used for numeric input, with an alternate function printed in blue above
each of the keys. Press the Shift key, then a numeric key, to access the instrument menu or
function indicated by the key label.
Some of the alternate functions associated with the numeric keypad are not available in all
measurement modes. Refer to the Measurement Guides listed in Appendix A.
Shift Key
Pressing the Shift key followed by a number key executes the function that is indicated in
blue above the number key. When the Shift key is active, its icon is displayed at the far right
of the title bar, above the sweep window.
Figure 2-2.Shift Key Icon in Title Bar
Esc Key
Press this key to cancel the parameter change being made and exit the current menu
function, if applicable.
Arrow Keys
The four arrow keys are used to scroll through a list and highlight the item you wish to select,
or to change the value of the currently selected parameter. The arrow keys can also be used to
move markers. The rotary knob performs similar functions.
Enter Key
Press this key to apply a parameter value or instrument setting you have entered, or to select
a highlighted item from a list.
MS2720T UGPN: 10580-00340 Rev. N2-3
2-3 Instrument Front PanelInstrument Overview
Rotary Knob
Turn the rotary knob to change numerical values, scroll through selectable items in a list, or
to move markers. Values or items may be within a dialog box or an edit window.
Menu Key
The Menu key displays a grid of shortcut icons for installed measurement modes and
user-selected menus and setup files. See Figure 2-3. Press one of the icons in the top three
rows to change modes. These icons are preinstalled and cannot be moved or deleted.
An alternative to the Menu key is to press Shift, then the Mode (9) key to display the Mode
Selector list box. Refer to “Mode Selector” on page 2-18.
Figure 2-3.Menu Key Screen
Shortcut icons displayed in the top rows of the Menu screen vary with the
Note
instrument model, firmware version, and installed options. Help for the Menu
screen is available by pressing the icon in the lower-right corner of the display.
2-4PN: 10580-00340 Rev. NMS2720T UG
Instrument Overview2-3 Instrument Front Panel
User-Created Shortcuts
To create a shortcut to any submenu key or main menu key, press and hold the key until a
grid appears, showing the open locations on the Menu screen where you can place the new
shortcut. Press one of the cells in the displayed grid to place the shortcut. See Figure 2-4.
Figure 2-4.Placement Grid for User-Created Shortcuts
To create a shortcut to a setup file (.stp), press Recall under the File menu, then press and
hold the desired file name until a grid is displayed. Select the display location of the new
shortcut as described above.
User-defined shortcuts remain on the Menu screen until deleted. To delete or move a shortcut
icon, press the Menu key, then press and hold the shortcut until the Customize Button dialog
appears. See Figure 2-5. Press the appropriate button to delete or move the shortcut icon.
Figure 2-5.Customize Button Dialog
Press Esc to close the dialog without deleting or moving the shortcut. Also use Esc to exit the
Menu screen.
MS2720T UGPN: 10580-00340 Rev. N2-5
2-4 Connector PanelInstrument Overview
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2-4Connector Panel
Figure 2-6 shows the connector panel on the MS2720T with lower frequency options (up to
20 GHz), which also have the Tracking Generator option available.
Figure 2-6.Test Panel Connectors for MS2720TOptions 709, 713, 720
1.External Trigger In Connector
2.External Reference In Connector
3.Fan Exhaust Port
4.Spectrum Analyzer RF In Port, Type N Connector
5.Location for Optional Tracking Generator RF Out, Type N Connector
6.External Power Connector
7.LAN Connection
8.USB Interface, Type A
9.USB Interface, Type Mini-B
10. Headset Jack
11. Reference Out Connector, 10 MHz
12. IF Out Connector, 140 MHz (Option 89)
13. GPS Antenna Connector
2-6PN: 10580-00340 Rev. NMS2720T UG
Instrument Overview2-4 Connector Panel
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7
24
5
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12
10
The connector panel shown in Figure 2-7 is for the two higher frequency options (32 GHz and
43 GHz).
Figure 2-7.Test Panel Connectors for MS2720TOptions 732, 743
1.External Trigger In Connector
2.External Reference In Connector
3.Fan Exhaust Port
4.Spectrum Analyzer RF In Port, Ruggedized Type K Connector
5.External Power Connector
6.LAN Connection
7.USB Interface, Type A
8.USB Interface, Type Mini-B
9.Headset Jack
10. Reference Out Connector, 10 MHz
11. IF Out Connector, 140 MHz (Option 89)
12. GPS Antenna Connector
Ext Trigger In
A TTL signal that is applied to the External Trigger 50 Ω female BNC input connector causes
a single sweep to occur. In the Spectrum Analyzer mode, it is used in zero span, and
triggering occurs on the rising edge of the signal. After the sweep is complete, the resultant
trace is displayed until the next trigger signal arrives.
Ext Ref In
The External Reference In port is a 50 Ω BNC female connector that provides for input of an
external frequency reference. Refer to your technical data sheet for valid frequencies and
input levels. To prevent damage to your instrument, do not use pliers or a wrench to tighten
the BNC connector or overpower the input.
MS2720T UGPN: 10580-00340 Rev. N2-7
2-4 Connector PanelInstrument Overview
RF In
To prevent damage to your instrument, do not use pliers or a plain wrench to
Warning
tighten the connector. Do not overtighten the connector. Do not overpower the
RF Input. Refer to your technical data sheet for valid frequencies and input
levels. Typical maximum input is +23 dBm (±50 VDC).
MS2720T-0709, MS2720T-0713, MS2720T-0720: Type N(f), 50 Ω connector. The
recommended torque is 12 lbf·in to 15 lbf·in (1.36 N·m to 1.70 N·m).
MS2720T-0732, MS2720T-0743: Type K(f), 50 Ω ruggedized connector. The recommended
torque is 8 lbf·in (0.9 N·m or 90 N· cm).
Tracking Generator RF Out
This is a 50 Ω Type N female connector (MS2720T-0809, MS2720T-0813, MS2720T-0820). To
prevent damage to your instrument, do not use pliers or a plain wrench to tighten the Type-N
connector. The recommended torque is 12 lbf·in to 15 lbf·in (1.36 N·m to 1.70 N·m).
External Power
This is a 2.1 mm by 5.5 mm barrel connector, 12 to 15 VDC, < 5.0 A. The external power
connector is used to power the unit and for battery charging. A green blinking LED near the
Power button indicates that the instrument battery is being charged by the external charging
unit. The indicator is a steady green when the battery is fully charged.
When using the AC-DC Adapter, always use a three-wire power cable that is
Warning
connected to a three-wire power line outlet. If power is supplied without grounding
the equipment in this manner, the user is at risk of receiving a severe or fatal
electric shock.
Refer to “External Power On” on page 3-11 and “Power-On Menu” on page 5-6 when
controlling the Spectrum Master via external power.
LAN Connection
The RJ-45 connector is used to connect the Spectrum Master to a local area network or
directly to a PC with an Ethernet crossover cable. Integrated into this connector are two
LEDs. The amber LED shows the presence of a 10 Mbit/s LAN connection when on, and a
100 Mbit/s LAN connection when off. The green LED flashes to show that LAN traffic is
present. For more information on the LAN connection, Ethernet connection, and DHCP, refer
to Chapter 8 and Appendix D, “LAN and DHCP”.
USB Interface – Type A
The Spectrum Master has two Type A USB connectors that accept USB Flash Memory
devices for storing measurements, setup data, and screen images.
2-8PN: 10580-00340 Rev. NMS2720T UG
Instrument Overview2-4 Connector Panel
USB Interface – Type Mini-B
The 5-pin mini-B USB 2.0 interface can be used to connect the Spectrum Master directly to a
PC. The first time the MS2720T is connected to a PC, the normal USB device detection by the
computer operating system will take place. A Windows driver is installed when Master
Software Tools is installed. Drivers are available for versions of the Windows XP operating
system and later. During the driver installation process, specify that the installation wizard
should search the Master Software Tools directory for the driver.
Note
For proper detection, Master Software Tools should be installed on the PC prior to
connecting the Spectrum Master to the USB port.
Headset Jack
The 3-wire headset jack provides audio output from the built-in AM/FM/SSB demodulator
and from other sounds generated by the instrument. The jack accepts a 3.5 mm 3-wire
miniature phone plug such as those commonly used with cellular telephones.
Ref Out 10 MHz
The External Reference Out port is a 50 Ω BNC female connector that provides 10 MHz at
approximately –7 dBm to 0 dBm. To prevent damage to your instrument, do not use pliers or
a wrench to tighten the BNC connector.
IF Out 140 MHz (Option 89)
This 50 Ω BNC female connector is for Zero Span 140 MHz IF Output with Option 89. To
prevent damage to your instrument, do not use pliers or a wrench to tighten the BNC
connector.
GPS Antenna Connector (Option 31)
The GPS antenna connection on the Spectrum Master is type SMA-female. GPS function is
described in Chapter 6.
MS2720T UGPN: 10580-00340 Rev. N2-9
2-5 Interface ScreenInstrument Overview
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2-5Interface Screen
Figure 2-8 illustrates the Spectrum Master interface screen in Spectrum Analyzer mode, with
touch screen menu keys, title bar, and measurement settings and results around the graph
area, or sweep window.
Figure 2-8.Spectrum Analyzer Display
1.Real Time Clock (and Latitude and Longitude with GPS)
2.Data Summary, Active Marker Values
3.Measurement Display or Measurement Grid or Sweep Window
4.Battery Charge Indicator
5.Instrument Mode
6.Submenu Key Labels or Active Function Block
7.Main Menu Key Labels
8.Optional Data Window (also location of Marker Table)
9.Instrument Settings Summary
2-10PN: 10580-00340 Rev. NMS2720T UG
Instrument Overview2-5 Interface Screen
Note
Many of the measurement settings displayed to the left and the top of the sweep
window are touch screen shortcuts to the corresponding menus.
Touch Screen Keys
Main Menu Touch Screen Keys
There are five main menu keys horizontally arranged along the bottom of the interface
screen. These keys give access to the instrument’s test and measurement functions, which are
documented in the applicable Measurement Guide. Refer to Appendix A, “Related
Documents”.
Different operation or measurement modes may display different main menu keys. To switch
to another mode, press the Menu key, or press Shift followed by the Mode (9) key.
Note
Submenu Touch Screen Keys
Most of the instrument setup, control, and measurement functions are performed through the
use of the submenu keys along the right side of the display. The key labels change as
measurement settings and instrument setup parameters change. The current submenu title
is displayed at the top of the submenu key block, which consists of up to eight touch screen
keys. See Figure 2-8 on page 2-10.
The installed options determine what measurement modes are available. Refer to
Table1-2 onpage1-4.
Symbols and Icons on the Title Bar
Figure 2-9.Title Bar with Icons
The instrument title bar displays the system date and time. When GPS is on and is tracking
satellites, its icon is followed by latitude and longitude coordinates.
Press the storage icon to open the touch screen keyboard for saving measurements, setups,
limit lines, or screen display JPEG files. This shortcut to the “Save Menu” on page 4-10 is
equivalent to pressing Shift and File (7), then Save. Refer to “Save Dialog Box” on page 4-3.
Press the camera icon to save a JPEG image of the current screen display.
The battery symbol indicates the charge remaining in the battery. The colored section inside
the symbol changes size and color with the charge level. See Table 2-1 on page 2-12. The
Battery Charge LED (adjacent to the On/Off button) flashes when the battery is charging,
and remains on steady when the battery is fully charged.
Caution
The Shift icon is displayed when the Shift key is pressed, and it remains displayed until
another button is pressed.
Use only Anritsu-approved batteries, adapters, and chargers with this instrument.
Anritsu recommends removing the battery for long-term storage of the instrument.
MS2720T UGPN: 10580-00340 Rev. N2-11
2-5 Interface ScreenInstrument Overview
Shift
Symbols and Indicators
The following symbols, icons, and indicators convey the instrument status or condition on the
display. The colors shown here are in the standard or default display mode.
Tab le 2-1.Symbols and Icons
SymbolDescription
Green: Battery is 30% to 100% charged.
Yellow: Battery is 10% to 30% charged.
Red: Battery 0% to 10% charged.
Green with Black Plug body: Battery is fully charged and
external power is applied.
Lightning Bolt: Battery is being charged (any color symbol).
Red Plug body: External power is applied, and no battery is
installed, or battery has lost communications with the instrument.
Storage Icon: Tap the floppy disk icon to display the Save screen
and menu.
Camera Icon: Saves a JPEG image of the current screen display.
Shift Key Icon: This icon is displayed between the battery symbol
and the submenu keys after the Shift key has been pressed, and
until another key is pressed.
GPS Icon: This icon is displayed right after the date and time
when GPS is available. Refer to Chapter 6, “GPS (Option 31)” for
details.
Power Button with Power LED and Charge LED: This is a
physical button with LED indicators. It is located near the numeric
keypad.
2-12PN: 10580-00340 Rev. NMS2720T UG
Instrument Overview2-5 Interface Screen
Black on WhiteNight Vision
Display Settings
The Display Settings submenu lets you adjust the screen brightness level and control the
auto-dimming function. Refer to “Brightness Settings Menu” on page 5-8.
You can also turn off the display entirely, as described in “Display Settings Menu”
on page 5-7. To turn the display back on, press any key (except the Power button) three times
in rapid succession.
In addition to the default display colors shown in Figure 2-8 on page 2-10, you can select
different color schemes to suit the ambient lighting conditions. See Figure 2-10. Some color
settings may not be available in all measurement modes.
Black on White — used for printing and viewing in broad daylight conditions
Night Vision — optimized for nighttime viewing
High Contrast — used in challenging viewing conditions
Color on White — used for printing and viewing in broad daylight conditions
Color on WhiteHigh Contrast
Figure 2-10. Spectrum Master Display Color Settings
MS2720T UGPN: 10580-00340 Rev. N2-13
2-5 Interface ScreenInstrument Overview
Touch Screen Calibration
Calibration optimizes the response of touch input. It is recommended if the instrument does
not respond as expected when you press the touch screen.
The Calibrate Touch Screen submenu key is in the “System Menu” on page 5-3. When pressed,
a message box is displayed with instructions for calibration. See Figure 2-11. Press Enter to
begin calibration, or press Esc to cancel. Alternatively, you can press 1 while the message box
is displayed to use the arrow keys for navigation. Refer to “Disable Touch Screen to Use
Arrow Navigation”.
Figure 2-11. Touch Screen Calibration Message Box
During calibration, press the crosshairs in sequence as they appear on the screen. The
process takes less than one minute.
Calibrate Touch Screen Shortcut
Another way to access touch screen calibration is to press Shift, then 0 (zero). This displays
the touch screen calibration message box shown in Figure 2-11. The shortcut can be used if
your touch inputs do not correspond to the appropriate locations on the screen to such an
extent that you cannot access the Calibrate Touch Screen submenu key.
Disable Touch Screen to Use Arrow Navigation
If the touch screen is not functioning, you can use Arrow Navigation to simulate pressing the
touch screen main menu keys and submenu keys. From the touch screen calibration message
box (see Figure 2-11), press 1 to display the arrow navigation message box, illustrated in
Figure 2-12. Press 1 again to enter the arrow navigation mode, or press Esc to cancel.
Figure 2-12. Arrow Navigation Message Box
In arrow navigation mode, a red border highlights the currently selected key (see Figure 2-13
on page 2-15). Use the arrow keys to move the red selection box, then press the Menu key to
activate the highlighted key. Only the main menu keys and submenu keys can be activated
using Arrow Navigation. This feature does not move the red selection box into other areas of
the touch screen, like the display title bar, sweep window, or the instrument settings area on
the left.
2-14PN: 10580-00340 Rev. NMS2720T UG
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