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Leader LF990
Signal Level Meter

  • Designed specifically for the ISDB-Tb terrestrial 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.
  • Remote control via USB interface.
  • Lithium-Ion battery operation, battery and AC adaptor included.
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Product Information
Datasheet 1.4 MB
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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. Level, 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 Signal Level Meter 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 extended operation. Battery and AC adaptor are included.
Measurement frequency range
Digital terrestrial 5 to 870MHz Level measurement, simple spectrum display
Temperature stability 50 to 864MHz (Broadcast frequency) Digital terrestrial broadcast BER measurement, MER measurement, constellation display
Frequency setting
Digital terrestrial 150kHz step
Built-in channel table
Digital terrestrial VHF, UHF in Japan and Brazil
Level measurement
Digital terrestrial RF format Analog AM (Video), FM (Audio), CW
Digital QPSK, 16 to 256 QAM, OFDM
  Measurement range Analog 20 to 120 dBuV (-40 to 60 dBmV)Digital 35 to 120 dBuV (-25 to 60 dBmV)
  Lowest display level Digital 25 dBuV (typ)
  Accuracy 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)
  Measurement bandwidth 280 kHz (type)
Digital terrestrial broadcast related functions
Input signal parameters Broadcast format Japan digital terrestrial broadcast (ISDB-T format) compliance
Input level rang Broadcast format The level difference between channels are within 20 dB
BER measurement Measurement format Simple BER
Measurement range Before RS 7.0E-2 to 2.0E-8, 0E+0
After RS 5.0E-1 to 2.0E-5, 0E+0
MER measurement Measurement range Before RS 7.0E-2 to 2.0E-8, 0E+0After RS 5.0E-1 to 2.0E-5, 0E+0
C/N Measurement range QPSK 5 to30dB
16QAM 10 to 30dB
64QAM 15 to 30dB
Constellation Modulation format 5 to 35dB
Measurement layer Transmission layer (A, B, C) selectable for measurement
V/S measurement +/-25 dB (Audio level relative to video level)
Spectrum display Center frequency of each channel for digital terrestrial
Connector type 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)
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 Level, C/N, BER, MER measurement value of each channel, measurement time
Display format (CSV) data, BMP data
Memory slot
Connector type USB1.1 type B
Functions Data output, remote control, printer output
Auto power off 5, 10, 20, 60 minutes and continue
Display type 5.7inch Color TFT LCD 320 x 240 dot
Brightness LED backlight
Ordering Information
Model Description Buy Online Price
LF990 Leader LF990 Signal Level Meter Discontinued
Included Accessories
  • 1 - Instruction Manual
  • 1 - Lithium-Ion Battery Pack
  • 1 - AC Adaptor
  • 1 - Battery Case for AA Alkari battery
  • 1 - Battery Snap for AA battery connection
  • 1 - AC cord
  • 1 - Soft Carrying case
Optional Accessories
LF990-OP71 Leader LF990-OP71 GPS Data Logging Option (icludes FS3150 software and USB Tracker Stick Data Logger) Discontinued
MP-500 Leader MP-500 Lithium-ion Battery for LF990 & LF52 Discontinued
UIT31812 Leader UIT318-12 AC Adapter for LF990 & LF52 Discontinued

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