Test Equipment Depot LG 226 User manual

VIDEO TV SIGNAL GENERATOR
The LG 226 TV Signal Generator modulates an analog
TV signal in VSB for the PAL, NTSC and SECAM systems.
GENERAL
FEATURES
LG 226 TV SIGNAL GENERATOR
The LG 226 TV Signal Generator provides the capabil-
ity to modulate an analog TV signal in VSB-AM format
applicable to the PAL, NTSC, and SECAM broadcast-
ing systems.
The TV signals of VHF, UHF, and CATV channels can
be generated by applying the external composite
video signal and audio signal.
The full-eld color bars and line sweep signals, and 1
kHz/400 Hz audio signals can also be generated.
This instrument can also be used as an analog TV
signal modulator of the LT 450 Video Signal Genera-
tor since this instrument provides the LT 450 control
capability.
■
Usage
Suitable to check the video and sound of analog TV.
■
RF output frequency
The RF frequency can be set from 30 MHz to 950
MHz in 50 kHz steps.
The channel table is provided to set the RF signal in
channel instead of the frequency.
■
Output attenuator
Highly reliable electronic attenuator is used.
■
Video modulation
The VSB (Vestigial Sideband) modulation is used to
eliminate the interference to of adjacent channels.
■
Sound modulation
Applicable to both FM modulation and AM modula-
tion (L method).
■
Preset function
Up to 100 front panel settings can be stored and re-
called.
■
Remote control function
The preset conditions stored in the preset memory
can be selected by specifying the address in INC,
DEC, and RESET operation via the REMOTE control
connector.
■
GPIB function
All front panel keys except the POWER switch can
be remotely controlled since the GPIB interface (con-
forming to IEEE488.1) is provided as standard.
■
LG 226 REAR PANEL
99 Washington Street
Melrose, MA 02176
Phone [phone]
Toll Free 1-800-517-8431
Visit us at www.TestEquipmentDepot.com

SPECIFICATIONSLG 226
RF Output
Frequency Range: 30 MHz to 950 MHz
Frequency Resolution :50 kHz
Frequency Accuracy :10 ppm
Frequency Switching Time :Within 100 ms
Frequency Setting
Channel Mode: Setting with a built-in channel table
Frequency Mode: Setting an arbitrary frequency
Output Impedance: 75 Ω
Output Connector: BNC
Output Level Range: -80 to 0 dBm (0 dBm max.)
Level Resolution: 1 dB
Output Level Accuracy :±2 dB (0 to -9 dBm)
±3 dB (-10 to -80 dBm)
Spurious: Within -30 dBc (Harmonics)
Within -40 dBc (Non-Harmonics)
Video Signal
Modulation System: Amplitude modulation of the VSB
(vestigial sideband) system according
to a broadcast system
Modulation
At the time of built-in channel table setting:
87.5 %±3 % (Negative modulation)
97.0 %±3 % (Positive modulation)
At the time of arbitrary setting:
0 to 100 % (in 0.5 % steps)
Modulation Frequency Band
At the time of built-in channel table setting:
4.2 MHz/5.0 MHz/6.0 MHz (Depends
on a broadcast system)
At the time of arbitrary setting:
4.2 MHz/5.0 MHz/6.0 MHz
Modulation Frequency Flatness :±1 dB
Input Impedance: 75 Ω
Input Connector: BNC
Reference Input Level :1 Vp-p
Spectrum Polarity: Positive (upper sound wave)
Built-in Pattern: Full-eld Color Bar (NTSC/PAL)
Line sweep (at 100 % modulation: 4.2
MHz) (NTSC/PAL)
Sound Signal
Carrier Frequency
At the time of built-in channel table setting:
4.5 MHz/5.5 MHz/6.0 MHz/6.5 MHz
(Depends on a broadcast system)
At the time of arbitrary setting:
4.5 to 6.5 MHz (in 0.5 MHz steps)
Video Sound Ratio
At the time of built-in channel table setting:
-6 dB/-7 dB/-10 dB (Depends on a
broadcast system)
At the time of arbitrary setting:
-30 to 0 dB (in 1 dB steps)
Modulation Types: FM/AM (L System) (Depends on a
broadcast system at the time of built-
in channel table setting)
Frequency Deviation
At the time of a built-in channel table Setting:
15 kHz/30 kHz(equivalent to 60 %
of the maximum deviation for each
broadcasting system)
At the time of an arbitrary setting:
0 to 100 kHz (in 1 kHz steps)
Modulation (AM)
At the time of built-in channel table Setting:
60%
At the time of arbitrary setting:
0 to 60 % (in 1 % steps)
Pre-Emphasis
At the time of built-in channel table setting:
75 μs/50 μs (Depends on a broadcast
system)
At the time of arbitrary setting:
75 μs/50 μs/OFF
Modulation Frequency Response :40 Hz to 100 kHz
Modulation Frequency Flatness :±1 dB
Reference Input Level :0 dBm (0.775 Vrms)
Input Impedance: 600 Ω
Input Connector: BNC
Built-in Sound Signal :Sine wave 400 Hz/1 kHz
* The modulation system cannot be selected at the time of
channel mode.
Preset
Function: Up to 100 sets of panel settings can
be stored and recalled.
GPIB
Function: Enables the key operations of the
front panel except a power switch.
Connector: 24-pin rectangular connector
57LE-20240-7700D35G (DDK) or
equivalent
Corresponding Standard :ANSI/IEEE Std 488.1-1987
REMOTE
Function: Enables the INC, DEC, and RESET
operations of the preset memory.
Connector: 14-pin rectangular connector
57LE-4014-7700 (DDK) or equivalent
Input Level: TTL
RS232C
Function: Controls the Video signal generator
LT 450, Selects the INC, DEC, or RE-
SET/video format which are related to
the PRESET-MEMORY.
Connector: 9-pin D-Sub (M)
Signal Format: Bidirectional serial data
Environmental Conditions
Operating Temperature :0 to 40 °C
Operating Humidity: ≤85 %RH (without condensation)
Operating Environment :Indoor use
Operating Altitude: Up to 2,000 m
Overvoltage Category :II
Pollution Degree: 2
Power Requirements
Voltage: AC90 to 250 V
Power Frequency: 50/60 Hz
Power Consumption: 35 W max.
Dimensions
426(W) X 88(H) X 400(D) mm
(excluding projections)
Weight
5.6 kg
Accessories
AC power cord.................................1
Instruction manual ...........................1
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
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