GTS/DEC/006
7
N
OTE
:
Between the power-on of the PC and the first run of decom software, the LEDs light orange as the state of the LEDs are
undefined.
J1, J2, and J3 headers
The following figure shows the selection headers on the GTS/DEC/006 card. J1 is used for PCM_IN_ANALOG(0), J2 is used for
PCM_IN_ANALOG(1) and J3 is used for PCM_IN_ANALOG(2).
Figure 3: J1, J2, and J3 selection headers
N
OTE
:
An RS-422 signal can be connected to the GTS/DEC/006 as a single ended input, by connecting either the (+) or (-) of the
RS-422 signal and the RS-422's ground reference to the GTS/DEC/006 bit sync input and ground.
SMART_OUT output
The GTS/DEC/006 has a programmable output which can output one of the following signals when selected.
6
SSS
Lights solid green when the Smart Source Selector is in a lock state and at least two channels are
combining; when not lit, the aligner is not able to find the alignment point in the data.
PINS
DESCRIPTION
1
Connects a 50Ω load between the + input and GND for single ended input (default).
2
Connects a 75Ω load between the + input and GND for single ended input.
3
Connects the - input to GND for single ended input (default).
4
Connects a 120Ω load between the + input and the - input for differential ended signals.
TABLE 12
Programmable output signals
SELECTED OUTPUT
DESCRIPTION
Minor frame pulse
High for last bit in sync word for at least 4 to 16 bits in frame (per decom channel).
Sync word found pulse
High for last bit in sync word location for at least 4 to 16 bits in frame (per decom channel).
Word pulse
High for last bit in word (per decom channel).
1 PPS pulse from IRIG_B time
Width of 1 PPS pulse is 16ns (high for 16ns every second).
TABLE 11
Status LED description
LED
NAME
DESCRIPTION
Single ended input
(50Ω termination)
Single ended input
(75Ω termination)
Differential ended input
(120Ω termination)
Shunts at pins
1 and 3 (default)
Place shunts at
pins 2 and 3
Place shunt at pin 4
J1 header
J2 header
J3 header