Front Panel Controls, Connectors, and Indicators
12691011
L13
4
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POWER
MIC
R
FP24
1kHzMETER
12
12
L C RL C R SLATETAPE RTNPHONESINT EXT
3578
Figure 1. Front Panel
1.Input Gain Controls8.Tape Return Switch
Sealed, conductive plastic rotary potentiometers.Toggle switch allows external audio to be monitored in the
headphones. The center position is FP24 program audio.
2.Input Peak/Limiter LEDs
The left and right positions monitor tape return audio; the left
Dual-color LED illuminates red at 3 dB below clipping; illumi-
position is locking, and the right position is momentary.
nates amber to indicate limiter activity.
9.Headphone Connector
3.L-C-R Switches (Input Assignment)
For stereo and mono headphones with 1o connectors.
Three-position switch assigns inputs to Left, Center (both
left and right) or Right outputs.10.Headphone Volume Control
4.Slate Microphone11.Headphone Peak LED
Condenser microphone with AGC activated by momentaryIlluminates 3 dB before clipping of either channel of the
Slate Microphone Switches. Slate Microphone output ap-headphone circuit and either channel of Tape Return audio.
pears at all outputs.
12.Power Switch
5.Tone Oscillator/Slate Microphone SwitchThree-position switch selects the power source. The unit is
Toggle switch activates 1 kHz tone oscillator when switchedpowered from internal batteries when in the left position;
to the left position and activates the slate microphone whenpowered from external DC source when in the right position.
momentarily moved to the right position. Microphone inputsCenter position is off.
are muted when Tone Oscillator or Slate Microphone are
13.Power LED
activated.
Two-color LED illuminates green when the unit is powered
6.Output Metersand changes to red when batteries require changing. For
Indicates peak output level in dBu.external DC, the power LED is always green.
7.Meter Brightness Control
Three-position switch adjusts the intensity of illumination of
the output meter; low illumination, normal illumination, or
super-bright illumination.
Input Panel Connectors and Controls
43.High Pass Filter Switch
Three-position switch selects 80 Hz or 160 Hz corner fre-
5
TAPE OUTquency filters, 6 dB per octave. Filters affect both inputs.
TAPE RTN
LEVELCenter position of switch removes filters from the signal
LRpath.
4.Tape Output
48V80LINK
LR1
3.5 mm (/8 in.) TRS stereo output (unbalanced) can be
15V160ONTHRESHOLDused to feed consumer level DAT, MiniDisc, and CD record-
12LIMITER7ers. Tip = Left, Ring = Right, Sleeve = Ground.
MIC INPUTSPHANTOM
5.Tape Return Level Control
1236Recessed potentiometers adjust Tape Return level feeding
Figure 2. Side Input Panelthe Headphone Monitor.
1.Mic Inputs6.Limiter Switch
Transformer-balanced XLR inputs accept microphone levelActivates input peak limiter. ON position functions as a dual
signals. Pin 2 = hot, Pin 3 = cold, Pin 1 = ground.mono limiter, with each input signal controlling its own limit-
er. LINK functions as a stereo limiter, with both left and right
NOTE: You can use Shure A15LA line adapters to con-
inputs controlled simultaneously. Center position of switch
nect balanced, line-level sources to these inputs.
turns limiters off.
2.Phantom Power
7.Limiter Threshold Level Control
Three-position switch selects either 48-Volt or 15-Volt phan-
Recessed potentiometers adjust peak level of limiter activa-
tom power for both inputs. Center position turns phantom
tion. Can be independently controlled for each input.
power off.
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ACEC
