Rear Interface; Input Assignments - Tektronix SC 501 Instruction Manual

REAR INTERFACE
TABLE 1-1
Pin No. Left (B) Right (A)
28 Unassigned Unassigned
27 1+ Gate Out 'EXT TRIG signal
26 Unassigned 1 EXT TRIG common
23-25 Unassigned Unassigned
22 Unassigned Unassigned
18-21 Unassigned Unassigned
17 * VERT INPUT signal * EXT HORIZ common
16 1 VERT INPUT common 1EXT HORIZ signal
14 Unassigned Unassigned
15 Unassigned Ramp Out
13 Not used Not used
12 +33.5 V Filtered de +33.5 V Filtered dc
11 Collector PNP Series-Pass Transistor Base PNP Series-Pass Transistor
10 Not used Emitter PNP Series-Pass Transistor
9 +33.5 Vdc common +33.5 Vde common
8 —33.5 V Filtered de —33.5 V Filtered dc
7 Collector NPN Series-Pass Transistor Emitter NPN Series-Pass Transistor
46 No Connection Base NPN Series-Pass Transistor
1-5 Not used Not used
4 Instrument not supplied with these connections. See INPUT and OUTPUT ASSIGNMENT.
Refer to Power Module instruction manual for information concerning pins labeled Not used.
INPUT ASSIGNMENTS
The VERT INPUT signal, EXT TRIG signal and EXT
HORIZ signal can be applied through the rear interface
A. VERT INPUT signal.
1. Unsolder the 200 ohm resistor attached to the
VERT INPUT connector. Connect the center conductor
of a coaxial cable to the 200 ohm resistor. Connect the
coaxial cable shield to ground.
2. Connect the other end of the coaxial cable: center
conductor to pin 17B and shield to pin 16B (common).
14
NOTE
Parallel operation may be obtained if another
200 ohm resistor is connected in series with the
center conductor of a coaxial cable to the junction of
R100 and the main circuit board. The addition of any
coaxial cable to input circuits affects the input
impedance.
B. EXT TRIG signal.
conductor to pin 27A and shield to pin 26A (common).