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NI Digital Waveform Generator/Analyzer Guide
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NI 656X Front Panels and Connectors
The NI 656X front panels contain four connectors—three SMB jacks
(CLK IN, PFI 0, and CLK OUT) and one 73-pin 12x Infiniband connector
(DIGITAL DATA & CONTROL, or DDC).
(CLK IN, PFI 0, and CLK OUT) and one 73-pin 12x Infiniband connector
(DIGITAL DATA & CONTROL, or DDC).
Figure 10 shows the NI 6561 front panels and pinout, which are identical to
those of the NI 6562. Signals marked with an asterisk represent the
complementary terminal for the differential signal of the same name. The
DDC signals are described in Table 6. The SMB connectors are the same as
those described in Table 7, and the LEDs are the same as those described in
Tables 8 and 9.
those of the NI 6562. Signals marked with an asterisk represent the
complementary terminal for the differential signal of the same name. The
DDC signals are described in Table 6. The SMB connectors are the same as
those described in Table 7, and the LEDs are the same as those described in
Tables 8 and 9.
Note
If you are designing a custom cabling solution with connector
(779157-01) and cable (192744-01), the NI 656X pinout is reversed
at the end connector. For example, the signal shown on pin 1 shown
in the previous figure would map to pin 73 at the end connector.
at the end connector. For example, the signal shown on pin 1 shown
in the previous figure would map to pin 73 at the end connector.
Table 5. NI 655X DDC Connector Pins
Pins
Signal
Name
Signal
Type
Signal Description
33
DDC CLK
OUT
OUT
Control
Output terminal for the exported
Sample clock.
Sample clock.
67
STROBE
Control
Terminal for the external Sample clock
source which can be used for pattern
acquisition.
source which can be used for pattern
acquisition.
13, 15, 17, 19,
21, 23, 25, 27,
29, 31, 47, 49,
51, 53, 55, 57,
59, 61, 63, 65
21, 23, 25, 27,
29, 31, 47, 49,
51, 53, 55, 57,
59, 61, 63, 65
DIO <0..19>
Data
Bidirectional digital I/O data channels
0 through 19.
0 through 19.
26, 30, 64
PFI <1..3>
Control
Input terminals to the NI 655X for
external triggers, or output terminals
from the NI 655X for events.
external triggers, or output terminals
from the NI 655X for events.
2, 4, 6, 10, 12,
14, 16, 18, 20,
22, 24, 28, 32,
34, 36, 38, 40,
42, 44, 46, 48,
50, 54, 56, 58,
62, 66
14, 16, 18, 20,
22, 24, 28, 32,
34, 36, 38, 40,
42, 44, 46, 48,
50, 54, 56, 58,
62, 66
GND
Ground
Ground reference for signals.
1, 3, 5, 7, 8, 9,
11, 35, 37, 39,
41, 43, 45, 52,
60
11, 35, 37, 39,
41, 43, 45, 52,
60
RESERVED
N/A
These terminals are reserved for future
use. Do not connect to these pins.
use. Do not connect to these pins.