Hilberling PT-8000A, Operating Manual

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PT-8000A Operating Manual v2.00.33
17
8.5 Side Panel Controls (Level Adjustments)
Sometimes it can be necessary to customize the input and output level of the
PT-8000A for special requirements. Boreholes in both left and right hand side
enable the access to trim potentiometers which allow manipulating the
preadjustment of levels.
8.5.1 Input Level
– Left Hand Side
P2
Microphone Sensitivity (Preadjustment)

Socket MIC-PTT Pin 1/5 (front panel);
fine adjustment with knob MIC
(see Page 68)
P6
Adjustment Level DATA Input / 0dBm Input
 Socket J20 AUDIO IN/OUT Pin 2
(rear panel)

Socket MIC-PTT Pin 4 (front panel)
The adjustment of sensitivity from MIC and
Data Input are twofold: Coarse adjustment
(P2) is Done at an early stage right after the
input transformers. MIC gain settings from
the front panel controls amplifier and gain
leveler circuit on the TX board.
8.5.2 Output Level
– Right Hand Side
P1
MAIN-RX Adjustment of audio volume
Headphones

Speaker
 Socket MIC-PTT Pin 3 (front panel)

Socket PHONE (Output Headphones)
(front panel)
P3
MAIN-RX Volume (Preadjustment)

Socket J20 AUDIO IN/OUT Pin 5
(rear panel)
P4
SUB-RX Adjustment of audio volume
Headphones

Speaker

Socket MIC-PTT Pin 6 (front panel)
 Socket PHONE (Output Headphones)
(front panel)
P5
SUB-RX Volume (Preadjustment)

Socket J20 AUDIO IN/OUT Pin 14
(rear panel)
Please use an appropriate tool to adjust the controls to prevent any damage to
the variable resistors.
Fig. 20
Fig. 21