TC Electronic LM2 User Manual - I/o Page

21

I/O PAgE

Ana In FS@

This parameter sets the gain in the analog domain before 

the A to D converter. It optimizes the use of the converter 

dynamic range like optical zoom on a digital camera. 

For precise analog measurements, where component 

tolerances of individual LM2 units, cable load etc. can be 

taken into account, this setting may be fine-tuned on the 

Utility page using the Ana In Trim parameters.

Ana Out FS@

This parameter sets the gain in the analog domain after 

the D to A converter. It optimizes the signal/noise ratio 

when connecting, for example, active monitor speakers to 

the analog outputs of LM2. Used for this purpose, there 

should be only a couple of dB more headroom in LM2 

than in the active speaker. The headroom adjustment 

should be done with the Ana Fader parameter set to 0.0 

dB. When the speaker clips, LM2’s analog output should 

be roughly 3 dB from clipping too.

Ana Fader

This parameter sets the gain in the digital domain 

before the D to A converter. Its primary use is to enable 

calibrated monitoring. The setup of calibrated monitoring 

should be performed in this sequence: 

1)  Scale the analog output using the Ana Out FS@ 

parameter. 

2)  Feed a pink noise reference signal to a digital input of 

LM2. 

3)  Adjust the Ana Fader parameter to obtain the desired 

sound pressure level at mixing position from each 

speaker one at a time. 

4)  Store the preset for easy access to a certain 

calibrated SPL.

Clock select

For analog input source select between:

Internal 44.1 kHz or Internal 48 kHz

If an external clock is connected to the AES or 

Word Clock input, one of those may also be used 

as a reference for LM2”

For digital input source select between:

Digital In, Wordclock (Intern at 44.1 kHz, Intern at 48 

kHz).

Input and Clock selections must be performed carefully to 

ensure synchronous precision performance from LM2.

Example:

Input Source: AES (48 kHz)

Clock Select: Internal 48 kHz

This situation could cause sample slips and the 

recommended settings would be:

Input Source: AES (48 kHz)

Clock Select: Digital in.

If Word Clock is used as master clock for the digital 

source it could also be used as clock for LM2. 

Connect Word Clock to Sync. In and set Clock Select to 

Word Clock.