Grass Valley Profile XP Aug 16 2004 - Manual (Page 315)

Electrical Specifications
23 July 2004 Profile XP System Guide 315
Reference Genlock
LTC Timecode
GPI I/O
Characteristics Description
Color Field Detection, Based on
SCH Phase Requirement: Correct color framing for signals having an
average SCH phase
±40°; Lockup ±10°
Supplemental Data: Once locked to color field, it will stay locked
over a range of 0
° to ±90°
Burst Frequency Lock Range Requirement: PAL,
±10 Hz at subcarrier
NTSC,
±20 Hz at subcarrier
Signal Amplitude Lock Range Requirement: Stays locked to +6 dB and -3 dB
Reference Genlock Input Return
Loss Requirement:
≥40 dB to 5 MHz
Unlocked 27Mhz. clock accuracy Requirement: When not locked to a reference black
27Mhz. will be within
± 25PPM
Tri-level sync Lock Range
(high-definition) Requirement: Stays locked to +6 dB and -3 dB at nominal
±300 mV signal
Characteristics Description
Input Supplemental Data: Longitudinal Time Code. AC coupled,
differential input
Input Impedance Supplemental Data: 20 k
Ω.
Input Amplitude Supplemental Data: 0.1 V p-p, differential, minimum
Maximum Input Voltage Supplemental Data: 2.5 V p-p, differential, maximum
Characteristics Description
GPI Input Supplemental Data: Inputs set to TTL level high.
Compatible with 5 volts CMOS/TTL open
collector or contact closures.
GPI Output Supplemental Data: Outputs are open drain drivers.
Max. voltage when outputs are open = 30V
Max. current when outputs are
closed = 200ma.