Annex B (informative) — Patch and bus level map
Annex B sets every patch and bus signal class side by side: nominal level, full scale, and impedance. The limits are in 7.2 for the patch classes, 7.3 for VIDEO's interface, 7.3 for VIDEO, and 6.6 for the bus classes.
| Where | Class | Nominal | Full scale | Impedance |
|---|---|---|---|---|
| Patch jack | AUDIO | ±5 V (10 V peak-to-peak), typical | ±10 V peak (B10) | out: 1 kΩ typical; ≤ 2 kΩ; in: 100 kΩ typical; ≥ 47 kΩ |
| Patch jack | CV | By range: ±5 V or 0 to +5 V for a typical control | By range; ±5 V at B5 | out: 1 kΩ typical; ≤ 2 kΩ; in: 100 kΩ typical; ≥ 47 kΩ |
| Patch jack | PITCH | 1.00 V/octave pitch CV, ±0.3 % of scale over the claimed span | By range; ±10 V at B10 | out: 1 kΩ typical; ≤ 2 kΩ; in: 100 kΩ typical; ≥ 47 kΩ |
| Patch jack | GATE | Output high +4 V to +12 V into 100 kΩ, low ≤ +0.5 V; a sustained level | — | out: 1 kΩ typical; ≤ 2 kΩ; in: 100 kΩ typical; ≥ 47 kΩ |
| Patch jack | TRIG | Output pulse high +4 V to +12 V into 100 kΩ, low ≤ +0.5 V, at least 1 ms high; 5 ms recommended | — | out: 1 kΩ typical; ≤ 2 kΩ; in: 100 kΩ typical; ≥ 47 kΩ |
| Patch jack | CLOCK | Output square wave high +4 V to +12 V into 100 kΩ, low ≤ +0.5 V, each state ≥ 1 ms; any duty | — | out: 1 kΩ typical; ≤ 2 kΩ; in: 100 kΩ typical; ≥ 47 kΩ |
| Patch jack | VIDEO | 0 to +1 V DC; black at 0 V and full scale at +1 V recommended | +1 V (U1) | out: 75 Ω ±1 % series resistor; in: 100 kΩ ±1 % |
| Bus CV / gate (16-pin) | BUS-CV | 1.00 V/octave pitch CV (bus CV), ±0.3 % of scale, from one transmitter | — | out: ≤ 100 Ω; in: ≥ 100 kΩ per listener |
| Bus CV / gate (16-pin) | BUS-GATE | 0 / +5 V gate (bus gate): output high +4 V to +12 V, low ≤ +0.5 V, from one transmitter | — | out: ≤ 2 kΩ; in: ≥ 47 kΩ per listener |
The table is generated from data/signals.json.
Every patch input withstands ±12 V whatever its class (SIG-002), and EIS recommends the same of every other 3.5 mm socket on a panel (7.1). A range (B1, U1, B5, U5, B10, U10) names a port's full-scale swing, and a port claiming one meets its limits (SIG-005). EIS recommends that an output claim the smallest range that contains its signal, and an input the largest it accepts.