Grass Valley PVS Series System Guide v.4.0 Dec 10 200 - Manual (Page 254)

Appendix A Electrical and Environmental Specifications
254 Profile XP System Guide July 27, 2001
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
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.