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Tektronix 1780-R User Manual

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Operating Instructions
3–16
1780R-Series Operator’s Manual
a. To recall a preset, force the corresponding remote line
low.
b. To store a front-panel configuration at a preset location,
apply a low first to the Store line (pin 11) and then to the
desired preset. Alternately, the Store line and desired
preset line may be forced low simultaneously.
Table 3–2: Remote Pin Functions 
Pin
Name
Function
1
RGB Staircase Input
1 M
W input impedance to ground. Requires 10 V
staircase signal.
2
/ RGB Enable
Low = RGB Enable. Routes the signal on pin 1 to the
Horizontal amplifier, where it is added to the ramps
from the Ramp Generator.
In RGB mode, the Ramp Generator reduces the
ramp to 1/3 or 1/4 size (selected by A2J585).
3
NC
4
/ Remote Sync Enable
Low = Remote Sync Enable. INT / EXT Reference
turned off, and instrument sync provided by the
signal on pin 10.
5
/ Preset 2
Low with Pin 11 High = Recall Preset 2.
Low with Pin 11 Low = Store current F/P settings at
Preset 2 location.
6
/ Preset 3
Low with Pin 11 High = Recall Preset 3.
Low with Pin 11 Low = Store current F/P settings at
Preset 3 location.
7
/ Preset 1
Low with Pin 11 High = Recall Preset 1.
Low with Pin 11 Low = Store current F/P settings at
Preset 1 location.
8
/ Preset 4
Low with Pin 11 High = Recall Preset 4.
Low with Pin 11 Low = Store current F/P settings at
Preset 4 location.
Operating Instructions
3–16
1780R-Series Operator’s Manual
a. To recall a preset, force the corresponding remote line
low.
b. To store a front-panel configuration at a preset location,
apply a low first to the Store line (pin 11) and then to the
desired preset. Alternately, the Store line and desired
preset line may be forced low simultaneously.
Table 3–2: Remote Pin Functions 
Pin
Name
Function
1
RGB Staircase Input
1 M
W input impedance to ground. Requires 10 V
staircase signal.
2
/ RGB Enable
Low = RGB Enable. Routes the signal on pin 1 to the
Horizontal amplifier, where it is added to the ramps
from the Ramp Generator.
In RGB mode, the Ramp Generator reduces the
ramp to 1/3 or 1/4 size (selected by A2J585).
3
NC
4
/ Remote Sync Enable
Low = Remote Sync Enable. INT / EXT Reference
turned off, and instrument sync provided by the
signal on pin 10.
5
/ Preset 2
Low with Pin 11 High = Recall Preset 2.
Low with Pin 11 Low = Store current F/P settings at
Preset 2 location.
6
/ Preset 3
Low with Pin 11 High = Recall Preset 3.
Low with Pin 11 Low = Store current F/P settings at
Preset 3 location.
7
/ Preset 1
Low with Pin 11 High = Recall Preset 1.
Low with Pin 11 Low = Store current F/P settings at
Preset 1 location.
8
/ Preset 4
Low with Pin 11 High = Recall Preset 4.
Low with Pin 11 Low = Store current F/P settings at
Preset 4 location.