TW LP4 S, Руководство пользователя

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FRONT PANEL
Modulometers – Continuous lighting, peak reading, BBC 1-7, dB or VU scaling, built-in red LEDs indicate
when the gain reduction is occurring with the limiters switched on.
Battery check pushbutton
6.3 and 3.5 mm phone jacks
Monitor selector switch – ST stereo. L+R sum signals, phase check, MS stereo equivalent Left.
L–R difference signals MS stereo equivalent Right. MS matrix, MS stereo equivalent. R right channel. L left
channel.
Phones volume control – Output voltage into 50
Ω
adjustable from 20 to 500 mV.
Limiters on / off / link switch – The limiters have fast attack time (less than 1 msec) and a slow release
time to smooth operation. Two red LEDs are built in the meters to indicate when the limiters are selected and
gain reduction is occurring. Threshold is internally set to +6 dBu at the balanced output. To adjust the
threshold for a value different from the su6 dBu, see page ADJUSTMENT POINTS.
Reference generator switch – 1 kHz sine wave signal is fed to both left and right outputs, its level can be
controlled by the Master control.
Slate microphone – It can be used either for identifying recorded segments or as an emergency field
microphone.
Low-cut filter switches – Low frequency attenuation is 14 dB / octave at 80 and 160 Hz.
Pan switches – Assign selected input signal to Left or Right output. In M position, equal amount of signal
is sent to Left and Right outputs. The S position of Pan switches 1 and 3 assigns Channels 1–2 and 3–4 as
stereo pairs controlled by Channel 1 and 3 Faders respectively.
Channel gain controls
Pre-Fade Listen pushbuttons – Each channel can be checked by monitoring. Output audio signal is not
interrupted when the PFL pushbutton is activated.
EE / RTN12 switch – A two-position switch selects the direct outputs from the mixer or the return 1 and 2
as a signal source for the monitoring.
Master – The fader sets the gain of both Left and Right legs and has +6 dB of gain in hand with the
nominal 0 dB gain position marked.
PWR LED – A red LED lights to indicate power is on. Flashes when voltage is 11.5 Vdc or less.
Power switch – In position EXT the mixer will be powered by an external DC supply and in BATT by the
internal batteries. Batteries should be recharged with the switch in EXT position.