7000-series remote control connector

The remote control connector is common for early 7000-series scopes.

It is an Amphenol 165-16 socket found on the rear of the 7503/7504, 7514, and 7704 scopes (connector J1075), and the 7904 (connector J90). The remote control connector is not present on the 7704A or 7904A. The pinout is different to the 549 remote control connector and associated accessories although the same socket is used.

Pin	Function	Notes
A	Single sweep reset	Close to ground within 0.5 V, 10 mA max, minimum 10 μs pulse width
B	Ground
C	A Remote ready	+5 V via 47 Ω when active, can drive #49 bulb
D	B Remote ready (*)	+5 V via 47 Ω when active, can drive #49 bulb
E	Remote readout lock-out (**)	Close to ground within 0.1 V, 2 mA max, 2 V open voltage
F	Remote single-shot lock-out (**)	Closure to ground within 0.4 V, pin E was grounded before, rate of change ≥ 0.1 V/μs, 3 mA max, 10 V open voltage
H	Upper screen remote erase (***)	Closure to ground within 0.4 V, rate of change at least 1 V/μs
J	Lower screen remote erase (***)	Closure to ground within 0.4 V, rate of change at least 1 V/μs
K	Remote write thru (***)	Closure to ground within 0.4 V, rate of change at least 1 V/μs

(*) not in 7503

(**) only in 7904 and 7514

(***) only in 7514