Ross openGear GPI-100, User Manual, Page: 22 / 42

2–8 • Installation GPI-100 User Manual (Iss. 06)
Each MDL-R22 occupies two slots and accommodates one card. The MDL-R22 provides one
SDI input, relay-isolated GPO outputs, and a monitoring video output. ( Figure 2.4 )
Connections Overview
This section briefly outlines the types of connections available on the rear modules.
SDI In — BNC 1
BNC 1 accepts an SDI (SMPTE 259) or HD-SDI (SMPTE 292) video signal. The GPI-100
requires this input in all cases. It inserts or extracts VANC packets in this signal and routes the
resulting output to
BNC 3 . The input signal is internally terminated in 75ohms when the GPI-100
is active; when the GPI-100 is in bypass, the termination is provided by the downstream
equipment connected to
BNC 3 .
SDI Out — BNC 3
BNC 3 carries the main program output from the GPI-100, consisting of the signal applied to
BNC 1 , with VANC data packets inserted. BNC 1 is routed directly to BNC 3 (without passing
through the GPI-100), under the following circumstances: power off, GPI-100 card removed,
GPI-100
Bypass push-button out, software selection or certain major error conditions.
SDI Monitor Out — BNC 2
When the GPI-100 is active, BNC 2 carries a copy of the SDI output present on BNC 3 . This can
be useful for test purposes. BNC 2 does not have any bypass capability: with power off or the
GPI-100 removed, there is no output signal on this jack.
SDI OSD Out — BNC 5 or BNC 6
BNC 5 ( BNC 6 on the MDL-R10 ) carries an SDI (SMPTE 259) video signal that can be
connected to an SDI video monitor.
OSD ANLG Out — BNC 4
BNC 4 (only on the MDL-R22 ) carries an analog video signal (NTSC/525 or PAL/625) that can
be connected to an analog composite video monitor.
Figure 2.4 Cabling for the MDL-R22 Rear Module
HD/SD-SDI
In
HD/SD-SDI
MON Out
OSD ANLG
Out HD/SD-SDI
Out
GPOs GPOs
3 4
1 2 1