7000-series remote control connector
(Redirected from 7904 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 |