GTS/DEC/003
7
Figure 3: J1 and J2 selection headers
N
OTE
:
The J2 selection header is not used on the GTS/DEC/003.
SMART_OUT output
The GTS/DEC/003 has a programmable output which can output one of the following signals when selected.
Figure 4: Minor frame pulse and sync word found pulse signals
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 10
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).
Shunts at pins
1 and 3 (default)
Single ended input
(50Ω termination)
Single ended input
(75Ω termination)
Differential ended input
(120Ω termination)
1
2
3
4
Place shunts at
pins 2 and 3
Place shunt at pin 4
J1 header
J2 header
Sync word
First word
in frame
1 bit
1 bit
Last word
in frame
Second word
in frame
PCM data
Minor frame pulse/sync word found pulse
4 to 16 bits
