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LF990 Signal Level Meter – Multi-Function For The Digital Age
LF990 Signal Level Meter Main Features
Designed specifically for the ISDB-Tb terrestria l format now
being implemented in South/Central America.
Accepts 5MHz – 870MHz/ 950MHz – 2,600MHz
(F-type connector; 75Ω)
Supports both digital and analog transmission systems to aid
in the analog to digital transition.
Supports QPSK, 16-256QAM and OFDM for CATV operation.
Supports broadcast, cable operation.
Measures RF Level, C/N. BER, MER and DELAY PROFILE.
Provides Constellation display and Spectral Display.
Presets and measurement logs can be stored in USB thumb-
drive for ease of use and documentation purposes.
Provides auto-channel search function for terrestrial and CATV.
Color LCD (TFT) display provides easy to read and understand
displays.
LF990 Signal Level Meter
Equipped with the latest innovations in RF Signal level measurement,
the new LF990 brings flexibility, reliability and accuracy to your every
day measurement challenges. The instrument handles both analog and
digital terrestrial broadcast, as well as CATV RF signals. Lev el, C/N
(carrier to noise), BER, MER and delay measurements can easily be
performed when evaluating digital transmission paths. Level, MER and
BER measurements are provided simultaneously. The instrument also
offers a spectral display with 7MHz, 21MHz and 49MHz spans and
displays the spectrum of up to a span of 7 contiguous digital channels.
The LF990 provides compatibility with a number of analog and digital
modulation formats including OFDM, QAM and others and, in addition
to Level, C/N, MER and BER measurements, it produces constellation
and spectral displays.
Up to 200 presets can be stored and recalled and a measurement log is
provided. Measurements can be output as comma separated values
and used in a spreadsheet making record keeping easy to obtain and
communicate to others.
A bright color LCD (TFT) display provides information and readouts in
an easy to use and understand manner. The instrument is powered by
a Lithium-Ion battery for extend ed operation. Battery and AC adaptor
are included.
IMPORTANT NOTE : These are preliminary specifications/information and are subject to change without notice.
Remote control via USB interface.
Lithium-Ion battery operation, battery and AC adaptor included.
ISDB-Tb
Ready
LEVEL and MER/BER Measurement Screens
Spectral Display, OFDM 64QAM and Delay Profile Screens
www.LeaderAmerica.com
1 (714) 527-9300
E-mail : Sales@LeaderAmerica.com
Leader Instruments Corporation
6484 Commerce Drive Cypress , CA 90630
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LF990 Signal Level Meter – Quick Summary
ISDB-T
ISDB-Tb
Ready
Ready
System Function
LCD 5.7“ color TFT
Level Y
BER Y
MER Y
Terrestrial
CATV
Memory INSIDE Y (512M)
Memory OUTSIDE Y (USB)
Remote Y (USB)
Battery Y (Lithium)
AC Adapter Y
Carrying case Y
C/N Y
Constelation Y
Delay profile Y
Spectrum display Y
Level Y
BER Y
MER Y
Constelation Y
Spectrum display Y
Uplink Y
LF990
LF990 Soft Carrying
Case (Included)
MP-500 Lithium Ion
Battery Pack
(Included)
AC Adapter
(100 – 240 Vac)
(Included)
IMPORTANT NOTE : These are preliminary
specifications/ information and are subject to
change without notice
www.LeaderAmerica.com
.
1 (714) 527-9300
E-mail : Sales@LeaderAmerica.com
LC1589 Field
Replaceable
F-type Input
Connector
(Sold Separately)
Leader Instruments Corporation
6484 Commerce Drive Cypress , CA 90630
Page 3
LF990 Signal Level Meter – Detail Specifications
Measurement frequency range
Digital terrestrial 5 to 870MHz Level measurement, simple spectrum display
Frequency setting
Digital terrestrial 50kHz step
Built-in channel table
Digital terrestrial VHF, UHF in Japan and Brazil
Level measurement
Digital terrestrial RF format
Digital terrestrial broadcast related functions
Input signal parameters Broadcast format
Input level range 45 to 100 dBuV
BER measurement
MER measurement Measurement range
C/N Measurement range 5 to 35 dB
Constellation Modulation format DQPSK, QPSK, 16QAM, 64QAM
Measurement layer
Delay profile measurement
Level display unit
dBuV (75 ohm terminated), dBuVemf, dBmV (75
ohm terminated), dBmW switchable
Multi display
Number of channel Maximum 200
V/S measurement
Measurement range +/- 25 dB (Audio level relative to video level)
Spectrum display
Center frequency Center frequency of each channel for digital terrestrial
Connector trype
F type receptable (75 ohm)
Voltage measurement
AC voltage 5 to 100 Vrms (50 to 60 Hz)
DC voltage 5 to 50 V
Resolution 0.1 V
Accuracy +/- (5 % + 1 V)
50 to 864MHz (Broadcast frequency)
Measurement range
Lowest display level Digital 25 dBuV (typ)
Accuracy
Measurement bandwidth 280 kHz (typ)
Measurement format Simple BER
Measurement range
Transmission layer (A, B, C) selectable for
measurement
D/U ratio
Delay time
Display
Display
Digital terrestrial broadcast BER measurement,
MER measurement, constellation display
Analog AM (Video), FM (Audio), CW
Digital QPSK, 16 to 256 QAM, OFDM
Analog 20 to 120 dBuV (-40 to 60 dBmV)
Digital 35 to 120 dBuV (-25 to 60 dBmV)
Analog +/- 2 dB (20 to 30 °C) +/- 3 dB (0 to 40
C)
°
Digital +/- 3 dB (0 to 40 °C)
(For the digital, when it is without multipath and
using high accuracy measurement mode)
Japan digital terrestrial broadcast (ISDB-T
format) compliance
The level difference between channels are
within 20 dB
Before RS 7.0E-2 to 2.0E-8, 0E+0
After RS 5.0E-1 to 2.0E-5, 0E+0
QPSK 5 to30dB
16QAM 10 to 30dB
64QAM 15 to 30 dB
Resolution: 0.1dB
Display range: 0 to -50dB
Accuracy: +/- 3dB (m oving speed 0, D/U > 30dB, 0 to 40 °C)
Display range: 1/3 of valid symbol length
- (1/12 of valid symbol length) to + (1/4 of valid
symbol length)
Valid range: 0 to guard interval length
Marker resolution: 0.21 us (Minimum: depends
on magnification of display)
Plot: Entire display or partial magnification
display
Marker: Digital value display for D/U ratio and
delay time of the marker location
Program memory
Number of storage Maximum 99,999
Storage contents Setting condition of measurement display
Data memory
Number of storage Maximum 99,999
Storage contents
Memory slot
Connector type USB1.1 type A
Functions Measurement setting, measurement data, measurement display screen (BMP) storage
REMOTE
Connector type USB1.1 type B
Functions Data output, remote control, printer output?
Auto power off
Time setting 5, 10, 20, 60 minutes and continue
Data log function
Measurement time interval 1 to 999 minutes, 1 minutes step settable
Begin/End of measurement time Setting of measurement start time and end time
Number of measurement channel 1 to 200 (Depends on the number of channel setting at the multi measurement display)
Storage contents Channel number, frequency and level of each measurement channel for the digital terrestrial
Storage media USB Memory
Number of storage data Maximum 99,999 (depends on number of channel setting and the capacity of the memory card
Storage data type One file per each measurement
Channel auto search function
Search specification Analog Level of 40 dBuV and above
Power supply
AC adapter (included) Lithium ion battery pack (included)
AA type Alkari battery Qty:6
Charging function/Charging time
Battery life time
Power consumption Maximum 25 W
Display
Display type 5.7inch Color TFT LCD 320 x 240 dot
Brightness LED backlight
Environmental Conditions
Operating Temperature 0 to 40 °C
Operating Humidity < 85 % RH (without condensation)
Storage temperature -10 to 50 °C
Operating Environment In door and out door
Operating Altitude Up to 2,000 m
Overvoltage Category
Pollution Degree 2
Accessories
Lithium battery pack 1
Battery case for 6 AA Alkari battery 1
Battery snap for AA battery connection 1
AC adapter 1
AC cord 1
Carrying case 1
Instruction manual 1
Level, C/N, BER, MER measurement value of each channel, measurement time
Display format (CSV) data，BMP data
Digital terrestrial
Battery charging for Lithium ion battery pack : Within 12 hours (Time of 100% fully charge)
(When using the lithium ion battery included)
7.5 hours (typ) (VHF/UHF level measurement)
5 hours (typ) (digital terrestrial measurement mode)
Level of 40 dBuV and above +Pilot signal of digital terrestrial
broadcast
5 hours (typical) (Time of 70% fully charge)
Ⅰ
IMPORTANT NOTE : These are preliminary specifications/information
and are subject to change without notice.
www.LeaderAmerica.com
1 (714) 527-9300
E-mail : Sales@LeaderAmerica.com
Leader Instruments Corporation
6484 Commerce Drive Cypress , CA 90630
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