GAI-Tronics LE300, Manual, Page: 9 / 56

Pub. 42004-735L2D
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Page Line Audio Monitoring Output
The Model LE300 provides a balanced 600-ohm audio output for monitoring audio on both the local and
remote page lines. The LE300 mixes the local and remote page line audio and routes it to the 600-ohm
audio output terminals. This audio can be sent to any external audio device (recorder, radio transmitter,
amplifier, etc.) with an input impedance equal to or greater than 600 ohms. The audio output gain is
adjustable using DIP switch SW3 positions five through eight on the main PCBA. Refer to Figure 7 for
the location of switch SW3 on the main PCBA and the tables below for setting options.
Table 3. Page Line Monitor Output Gain Setting on Main PCBA
SW3-5 SW3-6 SW3-7 SW3-8
Monitor Output
Gain
Open* Open* Open* Open* 0 dB
Closed Open Open Open − 30 dB
Open Closed Open Open − 27 dB
Closed Closed Open Open − 24 dB
Open Open Closed Open − 21 dB
Closed Open Closed Open − 18 dB
Open Closed Closed Open − 15 dB
Closed Closed Closed Open − 12 dB
Open Open Open Closed − 9 dB
Closed Open Open Closed − 6 dB
Open Closed Open Closed − 3 dB
Closed Closed Open Closed 0 dB
Open Open Closed Closed +3 dB
Closed Open Closed Closed +6 dB
Open Closed Closed Closed +9 dB
Closed Closed Closed Closed +12 dB
N
OTES
:
1. Changes to this parameter take effect without cycling power.
2. *Indicates default position.