Reference Video Connections; Figure 2-2: Gpi Input Circuitry; Figure 2-3: Gpo Output Circuitry - evertz HD2014 User Manual

HD2014, HD2012, HD2011 Video Passport
1RU Multi-Path Video Converter, Frame Synchronizer and Decoder
Figure 2-2 shows the internal circuit when HD201x GPIOs are configured to be General Purpose Inputs
(GPIs). GPIs are active low and edge sensitive rather than level sensitive. Figure 2-3 shows the internal
circuit when HD201x GPIOs are configured to be General Purpose Outputs (GPOs). The GPO is active
low with internal pull up (10k Ohm) resistors to +5V. When the output goes low it is able to sink up to
10mA. When high, the signal will go high (+5V). Do not draw more than 100µA from the output.
From Internal
2.1.2.

Reference Video Connections

BNC input for supplying external reference with internal 75 ohm termination. The
REF IN:
HD201x series supports bi-level sync NTSC or PAL references. NSTC/PAL color
black references may also be used.
Page 2-2
GPI
GPI
Command
GND

Figure 2-2: GPI Input Circuitry

Circuit

Figure 2-3: GPO Output Circuitry

Revision 0.1
TM
+ 5
VDC
3.6 K
+ 5 Volts
10 K
10 ohm
GPO
GND
to
internal
circuit
INSTALLATION