Lectrosonics EQ1_EQ2 - Manual (Page 13)

27 Band Automatic Equalizer
Set EQ Band Level - Allows the value of one or all EQ bands to be changed. The first byte sent is the EQ curve to
change. The second byte sent is the EQ band number, from 0-27. 0-26 correspond to 1/3 octave spaced frequencies
from 40Hz to 16KHz, and implies that one EQ band level byte will follow. If the second byte is 27, this implies that 27
EQ band level bytes will follow to set up the entire EQ. EQ band level byte range is 0-30, which corresponds to -15dB
to +15dB. Note that changes to any of the stored curves (1-4) will be written into nonvolatile memory.
Host sends command - 4
Host sends 3 or 29 bytes:
Byte 1: 0 - Current EQ setting
1 - Stored EQ curve
2 - Stored Target curve 1
3 - Stored Target curve 2
4 - Stored Target curve 3
Byte 2: 0-27, single or all band levels
Byte 3-29: New EQ band levels (see above)
Host receives 1 byte: 100 to confirm.
Set EQ Mode (Active/Bypass) - Sets the EQ to Active or Bypass Mode. In Active mode, the EQ functions normally.
In Bypass, all EQ bands are set to flat, and the Low Cut Filter is also defeated. The current EQ curve is restored
when the EQ1 is switched from Bypass to Active.
Host sends command - 5
Host sends 1 byte: 0 - Bypass, 1 - Active
Pink Noise Generator Commands
Output Pink Noise Level - Outputs the current pink noise level attenuation setting. Range is from 0-127. 0-96
corresponds to 0-48dB attenuation in .5dB steps, 97-126 corresponds to 49-78dB in 1dB steps, and 127 is 100dB
mute.
Host sends command - 6
Host receives 1 byte: Attenuation level (see above)
Set Pink Noise Level - Allows the value of the pink noise attenuator to be set. Range is from 0-127. 0-96 corre­
sponds to 0-48dB attenuation in .5dB steps, 97-126 corresponds to 49-78dB in 1dB steps, and 127 is 100dB mute.
Host sends command - 7
Host sends 1 byte: Attenuation level (see above)
Pop Suppress (DPS TM )Commands
Output Pop Suppress Setting - Outputs pop suppress attenuation setting. Range is from 0-80. This corresponds to
-40dBu to 0dBu threshold values in .5dB steps, and 127 is 100dB mute (Pop suppress off).
Host sends command - 8
Host sends 1 byte: Attenuation level (see above)
Output Pop Suppress Level - Outputs the instantaneous pop suppress level. The range is from 0-255, and corre­
sponds (non-linearly) to the instantaneous corner frequency of the high pass filter.
Host sends command - 9
Host receives 1 byte: Pop suppress level
Rio Rancho, NM – USA 13