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Issue 6
V-9908 MESSAGE/PAGE PANEL
Introduction
These instructions contain the specifications and
guidelines necessary to install, operate, and
maintain the V-9908, Message/Page Panel.
The V-9908 Message/Page Panel provides a
handheld push-to-talk microphone for live pages and
storage for eight messages. The V-9908 is
compatible with all Valcom self-amplified speakers.
The microphone, power and internal memory are
monitored, with visual and audible indicators if any
fault conditions are detected. When used with
Valcom Supervised Distributed Amplified One-Way
Paging Speakers and Horns, full system supervision
including the speaker audio path is possible.
Applications
Valcom Supervised Distributed Amplified
One-Way Paging Systems.
Refer to Figure 1 for a block diagram of a typical
installation.
Features
Dynamic noise canceling handheld microphone
for live page
Provides up to 8 minutes of high quality digital
recording
Stores and plays up to 8 messages
Eight (8) preprogrammed messages included
PC Programmable
Message panel fully supervised
Provides speaker line supervision
Provides microphone supervision
Provides DC power supervision
Allows remote message activation
Visual and audible system trouble indication
Audible signal cancel button
Power "ON" indicator
Mounts in most 4 gang deep electrical box
Dimensions
5"W x 4.25"H x 2”D
(12.7cm W x 10.8cm D x 5.08cm H)
4 lbs. (1.5Kg)
Specifications
Power Requirements
Operating Voltage 22 – 26VDC
Current 250mA
Microphone Input
Input Impedance: >5000 Ohms
Input sensitivity: 1kHz 1 millivolt for -12dBm
output (output terminated with 100 Ohms)
Audio
Frequency Response:
Mic – Output: 150Hz – 7,000Hz
Frequency Response:
Stored Messages – Output: 150Hz – 3,500Hz
Input Sensitivity (mic): 1kHz 1 millivolt for -12dBm
output (output terminated with 100 Ohms)
Signal to Noise (Idle mode, Ref -12dBm): >70dB
Signal to Noise (Mic active, Ref -12dBm) >50dB
Distortion (Mic – Output): < 1% THD at -12dBm
Output Impedance: < 25 Ohms
Nominal output level: -12dBm (Ref 600 Ohms)
Maximum output level: 0dBm (before clipping)
System Supervision
Main Audio Channel: 30Hz tone (inaudible)
Microphone: 1kHz tone supervises the preamp,
cable and element
Microphone Switch: DC loop with 4.7K Ohm resistor
Audio Output: DC loop terminated with a 4.7K Ohm
1/4W resistor
Voice Storage Memory: Fixed segment memory
monitoring
Main Power: 9VDC battery provides redundant
supervision power
Battery: Low voltage monitoring
All system faults are indicated by both an audible
and visual alarm. The audible alarm may be
silenced, however, the visual indicator will continue
to illuminate until the fault is removed.
User Controls (Figure 1)
Push-to-Talk Microphone
Pushbuttons to activate pre-recorded messages
Pushbutton to cancel message play
Pushbutton to cancel wire fault alarm