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Leader LF52 Signal Level Meter

BH #LELF52 • MFR #LF52
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Leader LF52 Signal Level Meter
Key Features
  • Designed for ISDB-T Terrestrial Format
  • Broadcast/Cable/Satellite Field Device
  • Supports Both Digital and Analog Systems
  • RF Level, C/N, BER, MER Measurement
The Leader LF52 Signal Level Meter is a multi-function field-measurement device designed specifically for the ISDB-T terrestrial digital television format that's being implemented in the Philippines and South and Central America and is already in place in Japan. The reliable, accurate portable device contains a surprising number of robust analysis functions for a unit of its size and cost.

Supporting both analog and digital terrestrial broadcast systems, the meter is ideal for analyzing systems that are undergoing a transition from analog to digital. The LF52 also supports satellite and CATV RF signals. The device accepts 5 MHz - 870 MHz frequencies for digital terrestrial and 950 MHz - 2.6 GHz for satellite signals frequencies. Compatible with OFDM, COFDM, BPSK, QAM and other modulation formats, the LF52 measures RF level, carrier to noise level (C/N), BER, MER, and delay profile.

The LF52 device's STN monochrome LCD displays measurements as a simple spectral display or as a constellation pattern. Up to 200 presets can be stored and recalled. A measurement log is provided, and measurements can be output as comma-separated values for use in a spreadsheet. RS-232 control is possible, for data output, remote control, and for connection to a printer.

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Leader LF52 Overview

The Leader LF52 Signal Level Meter is a multi-function field-measurement device designed specifically for the ISDB-T terrestrial digital television format that's being implemented in the Philippines and South and Central America and is already in place in Japan. The reliable, accurate portable device contains a surprising number of robust analysis functions for a unit of its size and cost.

Supporting both analog and digital terrestrial broadcast systems, the meter is ideal for analyzing systems that are undergoing a transition from analog to digital. The LF52 also supports satellite and CATV RF signals. The device accepts 5 MHz - 870 MHz frequencies for digital terrestrial and 950 MHz - 2.6 GHz for satellite signals frequencies. Compatible with OFDM, COFDM, BPSK, QAM and other modulation formats, the LF52 measures RF level, carrier to noise level (C/N), BER, MER, and delay profile.

The LF52 device's STN monochrome LCD displays measurements as a simple spectral display or as a constellation pattern. Up to 200 presets can be stored and recalled. A measurement log is provided, and measurements can be output as comma-separated values for use in a spreadsheet. RS-232 control is possible, for data output, remote control, and for connection to a printer.

Provides auto-channel search for terrestrial and CATV
6x AA battery or AC power operation
Stores up to 200 measurements internally with level, C/N, BER, MER measurement of each channel, and the measurement time, with display format (CVS) data
CompactFlash Type I and II cards can be used to store measurement presets, measurement data (one file created per measurement), and BMP files of the measurement display screen. A maximum of 99,999 files can be stored, depending on the number of channel settings and the card's capacity
Measurement time interval can be between 1 and 999 in one-minute increments. Set the measurement start time and end time, and choose the number of measurement channels (from 1 to 200)
The data log function stores channel number, frequency, and level of each measurement channel for the digital terrestrial functions
For terrestrial systems, supported functions are level, BER, MER, C/N, constellation, delay profile, and spectrum display
For CATV systems, supported functions are level, BER, MER, constellation, spectrum display, and uplink
For broadcast/cable satellite systems, supported functions are level, BER, level & BER simultaneous measurements, MER, C/N, constellation, and 2.6 GHz
Built-in digital terrestrial channel table (VHF, UHF in Japan and Brazil)

Leader LF52 Specs

Digital Terrestrial Related Functions
Frequency Range
5 - 870 MHz for level measurement, simple spectrum display
50 - 864 MHz (broadcast frequency) for digital terrestrial broadcast BER measurement, MER measurement, and constellation display
Frequency Setting
50 kHz steps
RF Format
Analog AM (Video), FM (Audio), CW
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 (typical)
Accuracy
Analog +/- 2 dB (20 to 30° C) +/- 3 dB (0 to 40° C)
Digital +/- 3 dB (0 to 40° C)
(For the digital, accuracy rating applies when it is without multipath and using high-accuracy measurement mode)
Measurement Bandwidth
280 kHz (typical)
Input Signal Compatibility
Japan digital terrestrial broadcast (ISDB-T format) compliance
Input Level Range
45 to 100 dBuV (level difference between channels is within 20 dB)
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
(As simple BER)
MER Measurement
QPSK 5 to 26 dB
16QAM 10 to 27 dB
64QAM 15 to 27 dB
C/N Measurement Range
5 to 30 dB
Constellation
Modulation Formats: DQPSK, QPSK, 16QAM, 64QAM
Measurement Layer
Transmission layer (A, B, C) selectable for each measurement
Delay Profile Measurement
D/U Ratio:
Resolution: 0.1 dB
Range: 0 to -50 dB
Accuracy: +/- dB (moving speed 0, D/U > -30dB, 0 to 40 °C)
Delay Time:
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)
Display:
Plot: Entire display or partial magnification display
Marker: Digital value display for D/U ratio and delay time of the marker location
Other Specs
Level Display Unit
dBuV (75 ohm terminated), dBuVemf, dBmV (75 ohm terminated), dBmW switchable
Multi-Display Channels
Maximum 200
V/S Measurement Range
+/- 25 dB (audio level relative to video channel)
Spectrum Display Center Frequency
Center frequency of each channel for digital terrestrial
Connector Type
F-type receptacle (75 ohm)
Voltage Range
AC: 5 to 100V rms (50 to 60 Hz)
DC: 5 to 50V
Voltage Resolution
0.1V
Voltage Accuracy
+/- (5% + 1V)
Program Memory
Stores up to 200 measurements
Memory Card Type
CFA Type I or Type II CompactFlash card
RS-232C
9-pin D-sub connector
Auto Power Off
5, 10, 20, 60 minutes and Continue
Channel Auto Search Function
Analog: Level of 40 dBuV and above
Digital Terrestrial: Pilot signal of digital terrestrial broadcast
Power Supply
AC adapter (included), Lithium ion battery pack (included), 6x AA-type alkaline batteries
Charging Time
For Lithium ion battery pack, within 12 hours for 100% charge and within 5 hours (typically) for 70% charge
Battery Life
For Lithium ion battery pack, 7.5 hours (typical) for UHF/VHF level measurement and 5 hours (typical) for digital terrestrial measurement mode
Power Consumption
Maximum 16W
Display Type
Dot-matrix LCD (320 x 240) with LED backlight
4" monochrome STN
Operating Temperature
32 - 104° F (0 - 40° C)
Operating Humidity
< 85% relative humidity (without condensation)
Storage Temperature
14 - 122° F (-10 - 50° C)
Operating Environment
Indoor/outdoor (without exposure to rain)
Altitude
Up to 6562 ft (2000 m)
Overvoltage Category
I
Pollution Degree
2

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