6 HB-3plus Headset Adaptor Box
3 Audio Level Adjustments
The HB-3PLUS provides five internal adjustments for setting various levels for operation:
• Desk Mic Level
• NENA In
• NENA Out
• Recorder Out
• Recorder Unsel Out
The internal adjustments may be set after the HB-3PLUS is mounted. All five adjustments are
accessible from the bottom of the enclosure and do not require the HB3-PLUS to be open for
adjustment.
The Headset I and II receive volume levels are user adjustable by the SELECT controls on the
front panel
3.1 Desk Microphone TX Level
The MD-MS desk microphone level may be adjusted through the hole on the bottom plate of the
desk microphone. This adjustment is usually set mid-range. Audio level to the console or C-Soft
application may be set from the DESK MIC LEVEL access point through the bottom of the
enclosure.
3.2 NENA Phone Level
The NENA phone levels may be adjusted from the NENA IN and NENA OUT access points on
the bottom of the enclosure.
3.3 Recorder Level
Each recorder output level (Common Recorder and Unsel Recorder) may be adjusted from the
access points on the bottom of the enclosure
3.4 Headset Transmit Level
Each headset TX circuit uses a clipper/filter circuit that does not require any adjustment. The level
is designed to match the requirements of the Vega dispatch consoles or the C-Soft application.
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