Fredenstein F600A - Manual (Page 4)

Fredenstein F600A Compressor
High Pass Filter:
To avoid compression of low frequencies, the side-chain has a built-in variable high pass filter.
Minimum is a flat frequency response ( fully CCW), maximum is 4000Hz (fully CW). Since this
high pass filter can be tuned up to 4 kHz for eample, the F600A can be used as De-Esser or on a
lathe as a cutting speed limiter.
ON Switch:
Switches the the unit on and the VU meter displays the gain reduction ( 0 VU without gain
reduction). If off, the unit provides a real hard bypass function, nothing is in the signal path, just a
relay bridges the input to output. Very useful feature to compare the compressed and uncompressed
signals. The engineer can keep the F600A always in its recording chain without fearing any
negative impact on sound if the F600A not used at the moment.
PEAK-RMS Switch:
In normal operations (PEAK-RMS switch not lit) the PEAK signal is fed to the side-chain and Soft-
Knee characteristics is selected.
After pressing the PEAK-RMS switch, the LED shows short flashes and indicates the Peak plus
Hard-Knee mode.
Again pressing the PEAK-RMS switch, the LED turns on solid and the RMS plus Soft-Knee mode
is activated.
And again pressing the PEAK-RMS switch, the LED emits short off periods and the RMS plus
Hard Knee Mode is selected.
The PEAK-RMS switch cycles through the four modes.
LINK Switch:
In stereo or multi-channel applications, up to ten F660s can be link together to synchronize the gain
reduction and prevent jitter in the acoustical position of sources. The F600A with the highest gain
reduction takes the lead and all others follow.
Note: In Fredenstein Bento enclosures it is possible to set different compressor bus segments and
therefore operate several stereo or multi-channel logical units simultaneously.
All operating parameters are stored automatically and will be recalled next time the F600A is
powered up.
Fredenstein F600A Manual V1.2 July 18, 2014 Page 3