Nicolet 526
The Nicolet 526 is a signal averager that is used in a modified OEMed Tektronix 5110 (5103N/D10) mainframe. The modifications performed by Nicolet include fan cooling via the bottom panel of the scope, and a 12-pin connector on the rear panel of the scope, connected to the interface board, connector J604.
Mechanically, the Nicolet 526 is a three-bay 5000-series plug-in. It mates with the center-bay plug-in connector. The Nicolet 526 is made of four boards and a backplane. Connection to the Tektronix mainframe is done via thee backplane. The four boards are:
- ADC and Register
- Address
- Control
- Memory
The design makes heavy use of 7400-series digital logic in DIP packages. The printed circuit boards are two-layer. The memory is an array of Fairchild 2102DC MOS 1k x 1 static RAM ICs, DIP, soldered in place.
The wires connecting the backplane board on the 526 to the mainframe interface connector on the 526 are labeled:
- H LOCK TRIG (white w/ black stripe)
- TRIGGER (light violet)
- RO TRIG (violet)
- Y LOCK IN (blue)
- FID SIG (green) maybe "FID" stands for "Free Induction Decay" in NMR?
- SIGNAL (brown)
- RO STUS (yellow)
- +7 UNREG (black)
- +7 UNREG (black)
- GND (white)
- GND (white)
- -VERT SIG (white w/ red stripe)
- +VERT SIG (white w/ brown stripe)
- -HORIZ SIG (white w/ orange stripe)
- +30 (red)
- -30 (orange)
The 12-pin rear-panel connector has its pins numbered on the inside of the connector.
| Pin | Function | Comment |
|---|---|---|
| 1 | ||
| 2 | ||
| 3 | ||
| 4 | ||
| 5 | ||
| 6 | ||
| 7 | ||
| 8 | ||
| 9 | ||
| 10 | Ground | |
| 11 | ||
| 12 |
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Front
-
Top
-
Left
-
Right
-
Bottom
-
ADC and Register
-
ADC and Register
-
Address Board
-
Address Board
-
Control Board
-
Control Board
-
Memory
-
Memory
-
Rear
-
Top front
-
Right front
-
Bottom front
-
Mainframe rear connector internal
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Mainframe rear connector external
-
Mainframe rear connector to J604
