LT 443D-GLA Genlock Unit

GENERAL

This unit provides genlock capability to lock the LT 443D mainframe with the external reference signal, and three independent black signal generators.
The NTSC/PAL black burst signals, Principal 20 types of HDTV analog tri-level sync signal formats, and 525p/625p analog sync signals can be used as an external reference signal.
The following black burst signal formats can be selected.
For NTSC/PAL system, black burst signal with field reference pulse is provided. For NTSC system, black burst with 10-field sequence identification conforming to the SMPTE 318M standards is provided.
The instrument continues operation since the flywheel mode is provided even if the external reference signal is accidentally removed in genlock mode. By logging the genlock status, the time can be obtained when the external reference signal is removed. The log information can be stored on the CF CARD.
The genlock timing can be adjusted for the entire color frame range when the NTSC/PAL black burst signal is applied; entire frame range when the HDTV analog tri-level sync signal is applied.
Three black burst signal output systems with selectable formats are available as follows:
For NTSC/PAL system, standard black burst signal and black burst signal with field reference pulse are provided. For NTSC system, black burst signal with 10-field sequence identification conforming to the SMPTE 318M standards, 525p/625p analog sync signal, and HDTV analog tri-level sync signal are provided.
The format and output signal timing of each output can be respectively set. The black signal timing can be adjusted for the entire color frame range when the NTSC/PAL black burst signal is applied; entire frame range when the HDTV analog tri-level sync signal is applied.

Specifications

Genlock Function

Loop-Through Input

Input Configuration

BNC connector, 75

loop-through

Return Loss

30 dB (0.3 MHz to 30 MHz)

Reference Input Signal

HDTV tri-level sync signal conforming to SMPTE 240M/274M/296M standards
525p/625p analog sync signal conforming to SMPTE 293M/ITU-R BT 1358 standards
NTSC black burst signal conforming to EBU N14/SMPTE RP-154/SMPTE 170M/SMPTE 318M standards
PAL black burst signal conforming to ITU-R BT. 470-6 standards

Reference Input
Signal Level

HDTV: Positive polarity: 300 mV, Negative polarity: -300 mV
525p/625p: -300 mV
NTSC: -286 mV
PAL: -300 mV

Maximum Input Level

4.5 V (DC + peak AC)

Operating Input
Level Range

6 dB

External Lock Range

10 ppm

Jitter

0.5 ° in burst lock mode

1 ns in sync lock mode

Operation Modes

Five modes are selectable.
Internal mode: INTERNAL

External mode:

AUTO (GO INTERNAL), MANUAL (GO INT), AUTO (FLYWHEEL), MANUAL (FLYWHEEL)

INTERNAL	Internal reference signal is used for operation. (INT mode)
AUTO (GO INTERNAL)	The EXT mode is automatically selected when the external reference signal is applied to the GENLOCK input. The INT mode is automatically selected when the external reference signal is removed.
MANUAL (GO INT)	The EXT mode is automatically selected when the external reference signal with the same format specified to the GENLOCK input is applied after power is turned on. The INT mode is automatically selected when no external reference signal is applied to the GENLOCK input, or signal format does not match the specified format.
AUTO (FLYWHEEL)	The EXT mode is automatically selected when the external reference signal is applied to the GENLOCK input after power is turned on. If the external reference signal is accidentally removed during operation, the instrument continues operation under the conditions immediately before the signal is removed since the flywheel mode is provided. After the external reference signal is recovered, the system is automatically locked.
MANUAL (FLYWHEEL)	The EXT mode is automatically selected when the external reference signal with the same format specified to the GENLOCK input is applied after power is turned on. If the external reference signal is accidentally removed during operation, the instrument continues operation under the conditions immediately before the signal is removed since the flywheel mode is provided. The flywheel mode will be held until the reset operation is performed via the front panel and the ENTER key is pressed even after the external reference signal is recovered.

Genlock Timing
Variable Range

H-PHASE
(FINE): Covers between H-PHASE (COARSE) steps.
H-PHASE
(COARSE):

1/2 line with respect to the input signal
Resolution: 0.0741

V-PHASE:

1 frame with respect to the input signal
Resolution: 1 line

F-PHASE: Up to

5 frames with respect to the input signal.
(Variable range depends on the input signal format.)
Resolution: 1 frame
(When NTSC black burst is applied, the coincident point of line 4 of the PAL and line 1 of the HDTV is handled as a reference.
When PAL black burst is applied, the coincident point of line 1 of the PAL and line 1 of the HDTV is handled as a reference.)

Analog Sync Signal Output
BLACK1/BLACK2/BLACK3
Format	HDTV tri-level sync signal conforming to SMPTE 240M/274M/296M standards 525p/625p analog sync signal conforming to SMPTE 293M/ITU-R BT 1358 standards NTSC black burst signal conforming to EBU N14/SMPTE RP-154/SMPTE 170M/SMPTE 318M standards PAL black burst signal conforming to ITU-R BT. 470-6 standards
Sync Level (into 75 Ω )	HDTV: Positive polarity: 300 mV 6 mV Negative polarity: -300 mV 6 mV 525p: -300 mV 6 mV 625p: -300 mV 6 mV NTSC: 40 IRE 1 IRE PAL: -300 mV 6 mV
Blanking Level	0 mV 15 mV
Rise and fall times	HDTV: 54 ns 20 ns 525p: 70 ns 10 ns 625p: 100 ns 10 ns NTSC: 140 ns 10 ns PAL: 200 ns 10 ns
Horizontal Sync Width	1125-Line: Positive polarity: 593 ns 40 ns Negative polarity: 593 ns 40 ns 750-Line: Positive polarity: 539 ns 40 ns Negative polarity: 539 ns 40 ns 525p: 2.35 0.05 625p: 2.35 0.1 NTSC/PAL: 4.7 0.1
Vertical Sync Width	HDTV: 5H 525p: 6H 625p: 5H NTSC: 3H PAL: 2.5H
Output Impedance	75
Output Connector	BNC
Number of Outputs	1 each
Timing Variable	H-PHASE: Up to 1 line-1 dot Resolution: Variable in 1 dot steps (54 MHz, 74.25 MHz, or 74.25/1.001 MHz converted into clock frequency) V-PHASE: Up to 1 frame-1 line Resolution: Variable in 1 line steps F-PHASE: Up to 5 frames (depends on the input signal format.) Resolution: Variable in 1 frame steps

Environmental Conditions
Operating Temperature Range	0 to 40 °C
Operating Humidity Range	90 % RH (without condensation)
Spec Guaranteed Temperature Range	10 to 35 °C
Spec Guaranteed Humidity Range	85 % RH (without condensation)
Operating Environment	Indoor use
Operating Altitude	Up to 2,000 m
Overvoltage Category	I
Pollution Degree	2

Power Source	Supplied by the LT 443D mainframe
Dimensions	79 (W) x 41 (H) x 371 (D) mm (excluding projections)
Weight	Approx. 0.5 kg

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