B.
EARMUFFS
Your Earmark Headset comes with hypo-allergenic, noise cancelling foam filled
earmuffs. These earmuffs are specially manufactured for your ValComm 900
Headset and are fabricated with a polyurethane skin over custom foam. Washable
fabric sanitary covers are available from Earmark if desired.
C.
SELECTING FREQUENCY
Your ValComm Headset provides 16 possible channels (numbers 0-15) of operation in
the unlicensed 902-928 mhz frequency band. All headsets are shipped set to channel
zero (0), but can be changed easily.
To change channels, do the following:
•
Turn off the power on the headset
•
Pull apart the headset cups so that you are looking into the ear cavity on the
side with the microphone.
•
Find the square cutout in the guard (see figure)... you will see a square DIP
switch that has four little slide switches on it.
•
Set the channel you want to one of the combinations shown on next page
using a sharp object to slide the switches.
•
Turn on the headset
3
6
B.
BATTERY CONDITION
The red light next to the Volume knob is an indicator of battery condition. As long as the
LED stays lit, the battery is adequately charged. When the battery charge degrades too
much, the LED will go blink and you will hear a beeping noise in your headset. This means
you only have a few minutes of power left and should recharge your headset.
C.
PTT SWITCH
The PTT (Push To Talk) switch is located on the bottom of the microphone side of your
headset (below the mode switch). Pressing it will override any other setting and allow
you to talk.
D. MODE SWITCH
The Mode Switch is between the PTT switch and the microphone. This switch selects
the two operating modes, "ON" or "OFF".
Duplex and Repeating Headsets offer a selection of Continuous Transmit (ON) and
Push to Talk (OFF). When the mode control is switched to OFF, you must press the PTT
button to talk. When in ON, the microphone is always live.
Half-Duplex Headsets do not have a Mode Control switch. They are always push to
talk using the PTT button.
Listen Only Headsets do not have a Mode Control switch nor a PTT switch. They
have no microphone and do not transmit.
Dipswitch Location in Ear Cup
Mode Switch