LT443D Generator

• Plug-in modules provide various functions
• Applicable to multiformat HDTV
• Assorted simultaneous outputs
• Easy-to-use sync signals
• Ethernet is standard
• User friendly operation

The LT443D Multiformat Video Generator Main Frame can be used where multiformat digital broadcast systems are the norm. Plug-in modules enable the output of SDI signals (i.e. HDTV, SDTV) embedded audio, sync signals and genlock functions. Users can customize this signal generator as desired.

LDR-LT443D PDF data Sheet

LT425D Digital Component Test Signal Generator

• 4 Serial (includes digital black) and 1 Parallel Outputs
• EDH Codes in Accordane with RP-165
• 4-Channel AES/EBU Embedded Audio plus
• Independent AES/EBU Digital Audio Output
• Compression Tests Include Variable Speed, Direction Controlled Marker and Sequentially switched patterns
• Digital Genlock with Programmed Advance and Delay
• 27-MHz Clock Output
• 2 Analog Black Burst Outputs
• 20 Character Programmable ID and Calendar/Clock
• Test Signals (Adapts Automatically to 625/50 or 525/60 requirements)
• Full Field 100% Color Bars
• Full Field 75% Color Bars (EBU Bars in 625/50)
• SMPTE Color Bars (BBC Bars in 625/50)
• Combination Color Bars/Ramp (SMPTE or BBC)
• Flat Field, Red
• MUltiburst, 100% or 60%
• Multipulse
• Line Sweep, 100% or 60%
• Bowtie (used with permission Tektronix, Inc.)
• 10-Step Staircase
• Ramp: Oversize, Digital Limit and Shallow (10)
• SDI Pathological Check Field


A precision source of 10-bit 4:2:2 component digital test signals, the LT 425D offers features that make it an ideal choice for productions and development applications. These include both embedded AES/EBU digital audio test tones and a dedicated rear panel AES/EBU output. Front panel switching includes 625/50 or 525/60 operation (test signals adapt automatically to suit the system selected) on-off control of Y, Cb and Cr.

Menu control of operating options is facilitated with front panel keys and on-screen menus. These include embedded audio channel on/off control and tone frequency selection. ID character and calendar/clock programming, timing advance/delay to +/- 16 lines, EDH on/off, key lock and control of the moving target and switched pattern displays. The latter are of value in compression testing and controls effect the speed and direction of the moving target and the dwell intervals for sequential switching of selected test patterns.

Digital genlock includes front panel advance/delay keys (coarse and fine). The coarse keys operate in 3 ms increments, the fine keys in increments of 20 ns.

This, combined with a +/- 16 line menu selected advance/delay, yields precise calibrated timing control.

Rear panel facilities include 4 serial outputs (one digital black). 1 parallel output, 1 AES/EBU digital XLR audio output. 2 black burst analog outputs, a pair of genlock loop-through inputs and a 27-MHz clock output.

LDR-LT425D PDF data sheet

LT428 Component Digital Sync Generator

• Independent Timing of 3 Black Burst Outputs
• Genlock to NTSC or PAL Black Burst and Composite Sync
• SDI Output Conforms to SMPTE 259M
• Simultaneous SD-SDI and Analog Composite Outputs
• AES/EBU Digital or Analog Audio Output
• Equipped with Stereo Sound Output
• Word Clock Output at 44.1 kHz or 48 kHz
• PC Setup of Format, Test Patterns, Audio Frequency, Black Burst and Genlock Timing via RS-232C
• Remote Control Software Supplied on CD-ROM
• Half Rack Size with Rack Mount


The LT 428 component digital sync generator is an economical, compact 1U half-rack solution. It is equipped with 3 independent black burst outputs, to facilitate system timing and synchronization of digital and analog systems. Genlock allows synchronization to NTSC or PAL video signals, black burst, and composite sync. Simultaneous test signal outputs are provided for component serial digital output conforming to SMPTE 259M and composite analog. Test patterns, 24 total, include10-bit color bars for FCC, SMPTE, EBU, 75%/100% full field and 75% red with colorbars. Other patterns include 10%/15%/20%/100% window, pluge, crosshatch, staircase 5/10 step, digital gray, check field, black, 100% white, 15kHz Bl/Wh, 75% red field. AES/EBU digital and analog audio 2-channel outputs are selectable. Word clock output is available at 44.1 kHz or 48 kHz. System setup is accomplished from a Windows PC via the RS-232C interface to set changes such as selection of NTSC or PAL, black burst and genlock timing, video output pattern, and audio frequency. Remote control software is supplied on a CD-ROM.

LDR-LT428 PDF data sheet

LDR-LT 447 Multi format Pattern Generator

• HDTV, SDTV, ATSC, DVB, ISDB (29 Formats)
• NTSC, PAL, PAL-M, PAL-N, SECAM
• SXGA, XGA, SVGA, VGA
• DVI-D, D-5, D-15, YPbPr/GBR, Y/C, Composite
• Monoscope, Color Bars, Crosshatch, Gray Scale, Circle...
• Natural Picture (Optional)
• Aspect Ratios 16:9, 4:3, Letter Box and Squeeze
• 100 Preset Memories Plus Arbitrary Start Stop
• Audio Tones
• RS-232C Remote Control

This digitally synthesized generator outputs a remarkable number of DTV formats compliant with ISDB, ATSC and DVB standards. The DVI-D output conforms to DDWG digital display working group standards supporting single link TMDS transition minimized differential signaling up to 165 MHz clock rates. TMDS helps to reduce EMI induced errors over today's long cables. Menu control of operating options is facilitated with front panel keys and on-screen menus. These include embedded audio channel on/off control and tone frequency selection. ID character and calendar/clock programming, timing advance/delay to ± 16 lines, EDH on/off, key lock and control of the moving target and switched pattern displays. The latter are of value in compression testing and controls effect the speed and direction of the moving target and the dwell intervals for sequential switching of selected test patterns.

LDR-LT447 PDF data sheet

411 NTSC Test Signal Generator

• Precision 10-Bit D/A
• Digital Genlock
• 17 Test Signals + APL + Bounce
• Front Panel Setup Switch (0 to 7.5%)
• Dedicated SMPTE Bars Output with 16 Character Programmable SID
• Balanced Audio Test Tones
• Occupies Only 1 3/4" of Vertical Rack Space


An ideal choice as the master sync and test-signal generator for production, post production, component and systems maintenance and the engineering lab, the Model 411 offers the stability and precision of digitally synthesized analog signals. A 10 bit D/A provides excellent accuracy for all test signals while an 8 bit D/A is used for sync blanking and related signals. Test signals selected at the front panel include: SMPTE and full-field color bars; split field bars with reversed bars in lower half; window; pulse-bar (2T, modulated 12.5T and bar); dot/crosshatch; red and blue rasters; white rasters at 100 and 50 IRE; 100 and 50 IRE multiburst; matrix test pattern that includes crosshatch, pulse bar, SMPTE bars and multiburst; 10 step staircase and ramp with modulation ON/OFF for each; and a 10 and 90 APL signal with bounce ON/OFF control. The unit features digital genlock with front panel fast and slow advance and delay fingertip control. MODE LEDs show sync generator status in terms of internal reference and both burst and sync lock. A dedicated SMPTE color bar output featuring a 16 digit alphanumeric source identifier provides a convenient color bar/source ID available at all times. Character selection is easily set up at front panel fingertip controls. Included are audio tones at 400 or 1000 Hz (internally switchable) at 0 dBm (internally adjustable from -3 to +6 dBm), balanced output at XLR connector. A master sync generator that offers long-term dependability, accuracy and stability, with all the test signals that an NTSC environment is likely to need, the 411 stands out in overall value and yet uses up only one unit (1 3/4") of vertical rack space.

LDR-411 PDF data sheet

408 (PDF DATA)

408 PDF data sheet

408NPS (PDF DATA)

408NPS PDF data sheet

LDR-LT416 NTSC/PAL/SECAM PATTERN GENERATOR

• NTSC, PAL, SECAM & NTSC at 4.43 MHz
• RF Outputs Channel Plans for Different Countries
• Component Signal Outputs of Y/B-Y/R-Y & GBR
• S Video & Composite Video Outputs
• Ideal for Testing LCD Projectors & New Generation TV's


Model LT 416 is a precision test-signal source which provides four color systems of NTSC, PAL, SECAM, and NTSC-4.43 for testing and adjusting all kinds of video products such as TV, VCR, etc. The generator provides composite, Y/C plus component signal outputs (except in SECAM mode) for Y/B-Y/R-Y and GBR formats. This makes it very suitable for testing products with component video capabilities on production lines. Selection from extensive pre-programmed country charts and then stepping through channels easily accomplishes RF output channel testing. There are 15 test patterns including color bars, raster, convergence and circle to satisfy the most demanding applications.

LDR-416 PDF data sheet

LDR-LT436

Monoscope Pattern Generator with Multiple Output Formats

The LT 436 an Analog Test Signal Generator offers a 1000 line monoscope incorporating colorbars, gray scale, corner circles and reverse capability. Outputs for component analog YPbPr, D1 as per EIAJ, Y/C and composite allow the instrument to be used for adjusting and inspecting a wide variety of video equipment with those input connectors and formats.

Test patterns include a still picture pattern of a girl with a carnation, monoscope, SMPTE and split-field color bars, 8-color rasters with 75%/100% and RGB on/off selection, pulse & bar, stairstep, convergence, window, character and others enabling testing of resolution, color accuracy, linearity, high-voltage regulation and character quality from a single unit. Software is supplied for download of the user’s arbitrary still picture pattern (frame data) as required to be accessed from the others button. A still picture, of a girl with a carnation, that conforms to ITE standard is provided. The monoscope pattern offers testing to a horizontal resolution of 1000 TV lines maximum. Color bars are superimposed on this pattern allowing simultaneous testing of luminance resolution and color accuracy. YPbPr, D1, Y/C and composite formats are all output at the same time. Many test patterns can be modified with the individual RGB on/off buttons or with the 75% or 100% selection and reverse keys provided, making the instrument ideal for a wide variety of adjustment and inspection applications. Availability is from stock through Leader’s regional sales offices and nationwide distributor network.

LDR-LT436 PDF data sheet

LT1606(PDF DATA)

LT1606 PDF data sheet

LG3803 8VSB/QAM Signal Generator
Synthesized Signal Generator

Designed to address the challenges of DTV tuner testing, the LG3803 provides all the signal control necessary for testing the performance of ATSC complient tuners and receivers.

The RF output can be set to emulate 8VSB. 64 and 256QAM modulation formats and the modulation frequency can be set from 50MHz to 900MHz covering the entire VHF and UHF spectrum. Output level renges from -100 to + 13dBm (50 Ohm) and it is settable with 0.1dB resolution: ideal for doing input sensivity tests.

A pseudo-random (PN) generator and a BER counter are built into the instrument and facilitate easy BER measurements in a single unit.

The instrument can be modulated internally (2 built in test patterns: color bars and ramp) or can be externally modulated (DVB-ASI or SPI input). An optional DVD drive is available to supply moving video playback for HD rates; an excellent way to test receivers in a "real life" simulation.

The QVGA display provides easy instrument control. The instrument can be Ethernet controlled. Remote control allows present recall and increment; up to 100 presets can be set up and recalled aiding in the automatic testing process.

PDF data sheet