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48 Chapter 4 Patching channels

Setting dimmers to Dimmer Doubling

ETC’s Dimmer Doubling technology can increase the controllable circuits

of a 115 volt, 60 Hz dimming system.

Dimmer Doubling converts the

output of a single ETC Sensor or L86 dimmer into two separate signals.

Both signals then provide discrete levels for two ETC Source Four lights.

You must configure the console by setting the mode of the dimmer and

the dimmer’s port before the dimmer will function in Dimmer Doubling

mode. Each dimmer and port is set individually. Before patching, set the

port mode with the procedure given under Setting the port to Dimmer

Doubling, page 313.

When a dimmer is doubled, it is functionally split into two dimmers that

are distinguished by A and B. For example, dimmer 1 becomes dimmer

1A and dimmer 1B. For each doubled port, the A components of each

dimmer are controlled by DMX512 outputs 1-256 and the B components

of each dimmer are controlled by DMX512 outputs 257-512. The console

represents doubled dimmers in the Patch display as dimmers in the range

1-256, parts A and B.

If a channel was patched to the dimmer before it was doubled, the

channel is assigned to both the A and B parts, thus keeping the number

of controlled circuits the same rather than doubled. To assign the doubled

parts of a dimmer independently, see Creating a custom patch, page 37.

Set dimmers to doubled with the procedure below.

23.

Dimmer Doubling is available only for ETC dimming systems operating nominally

at 115 volts, 60 Hz. It is not available for systems operating at other voltages or

frequencies.

24.

The Source Four lights should be running 77V HPL lamps when operated by a

doubled dimmer.

Keystrokes: Action:

1. Press [Patch]. Selects Patch display

2. Press [Dim] [1][8] [Thru]

[3][5].

a. Often there is no need to press [Dim] in this step because the

Patch display defaults on entry to dimmer input.

Selects dimmers 18 through 35

Prompt reads:

Select dimmer numbers, then press

ENTER to assign to a channel, or

press AT to assign a proportion, or

press PROFILE to assign a profile

3. Press [S1], Dimmer

Double.

Sets selected dimmers to doubled

mode

1 2 ... 57 58 59 60 61 62 63 64 65 66 67 ... 379 380

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