Annex H (informative) — Patch and bus level map

The patch classes on one page. The limits are in 7.2.

Plane Class Nominal Full scale Impedance
Audio MOD-AUDIO ±5 V (10 V peak-to-peak) typical; full scale by range, ±10 V at B10 ±10 V peak (B10) 1 kΩ typical; ≤ 2 kΩ out, 100 kΩ typical; ≥ 47 kΩ in
Control CV MOD-CV ±5 V or 0 to +5 V, typical control; by range the claimed range; ±5 V at B5 1 kΩ typical; ≤ 2 kΩ out, 100 kΩ typical; ≥ 47 kΩ in
Pitch CV MOD-CV-1VOCT 1.00 V/octave pitch CV, ±0.3 % of scale over the claimed span by range; ±10 V at B10 1 kΩ typical; ≤ 2 kΩ out, 100 kΩ typical; ≥ 47 kΩ in
Gate, trigger, clock MOD-GATE Output high +4 V to +12 V into 100 kΩ, low ≤ +0.5 V; a sustained level — 1 kΩ typical; ≤ 2 kΩ out, 100 kΩ typical; ≥ 47 kΩ in
Gate, trigger, clock MOD-TRIG Output pulse high +4 V to +12 V into 100 kΩ, low ≤ +0.5 V, at least 1 ms high; 5 ms recommended — 1 kΩ typical; ≤ 2 kΩ out, 100 kΩ typical; ≥ 47 kΩ in
Gate, trigger, clock MOD-CLK Output square wave high +4 V to +12 V into 100 kΩ, low ≤ +0.5 V, each state ≥ 1 ms; any duty — 1 kΩ typical; ≤ 2 kΩ out, 100 kΩ typical; ≥ 47 kΩ in
Video MOD-VIDEO 0 to +1 V DC: black 0 V, full scale +1 V +1 V (U1) 75 Ω ±5 % series out, 100 kΩ typical; 100 kΩ ±10 % in
Bus CV / gate (16-pin) BUS-CV 1.00 V/octave pitch CV (bus CV), ±0.3 % of scale, from one transmitter — ≤ 100 Ω out, ≥ 100 kΩ per listener in
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 — ≤ 2 kΩ out, ≥ 47 kΩ per listener in

The table is generated from data/signals.json; the bus classes are in 6.6.

Every patch input withstands ±12 V (SIG-002) whatever its class, 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; a port claiming one meets its limits (SIG-014), and EIS recommends that an output claim the smallest that contains its signal and an input the largest it accepts.

EIS · Every patch class on one ±12 V axis -12 -10 -8 -6 -4 -2 0 +2 +4 +6 +8 +10 +12 MOD-AUDIO B10 default; B5, B1 MOD-CV B5 default; U5, B10, U10, B1, U1 MOD-CV-1VOCT 1 V/octave; B10 default; U10, B5, U5 MOD-GATE low ≤ +1 V, high ≥ +3 V at an input; output +4 to +12 V MOD-TRIG low ≤ +1 V, high ≥ +3 V at an input; output +4 to +12 V MOD-CLK low ≤ +1 V, high ≥ +3 V at an input; output +4 to +12 V MOD-VIDEO U1 default volts at the patch tip; red: the ±12 V every input withstands (SIG-002)