Intercom Adjustments - Firecom 3010 Series Installation & Operation Manuals

IMPORTANT
IMPORTANT
FIGURE 18
3010 Series Adjustments
16.
INSTALLATION

INTERCOM ADJUSTMENTS

In order to match the Transmit and Receive Audio to the radio, it will be necessary to
perform some adjustments. These items are adjusted by switches and variable resistors
located on the circuit board inside the intercom unit (Figure 18).
These adjustments MUST be performed by a Qualified Radio Technician. Failure
to perform these adjustments may result in problems hearing and transmitting
radio signals when using the Intercom System.
RECEIVE AUDIO ADJUSTMENT
27. Turn the 2-way radio on, and adjust the radio volume to the normal level for
use WITHOUT THE INTERCOM INSTALLED.
28. Radio A (all models): Adjust VR3 to set the Receive Audio so that it is at the
same level as the audio heard when listening to someone speak over the inter-
com.
29. Radio B (3020 & 3025 only): Adjust VR4 to set the Receive Audio so that it is
at the same level as the audio heard when listening to someone speak over the
intercom.
HOOK SWITCH ADJUSTMENT
The Hook Switch is used by some radios to sense when the hand mic has been taken
"off-hook." This information is for many different functions, including disabling a
programmed or scanning function. If the radio is a multi-channel radio with a scanning
mode, it may be necessary to make the proper hook switch connections and adjustments
to the intercom. A change to the radio programming may also be needed. The
Firecom 3010 Series Intercoms have an adjustable delay between pressing the Push-To-
Talk on the headset and the keying of the radio. The minimum delay is 0.2 seconds, the
maximum is 3.5 seconds.
30. Radio A (all models): Adjust VR2 for the proper delay time.
31. Radio B (3020 & 3025 only): Adjust VR1 for the proper delay time.
If a delay between pressing the PTT and keying the radio is NOT neces-
sary for your radio, make sure it is set to the minimum time.
VR4: Receive
Audio (Radio B)
VR3: Receive
Audio (Radio A)
VR2: Hook Switch
Delay (Radio A)
VR1: Hook Switch
Delay (Radio B)
VR3 VR4
S2
VR2
VR6
S1
VR1
VR5
S2: Range Switch
Assembly (Radio B)
VR6: Transmit
Audio (Radio B)
S1: Range Switch
Assembly (Radio A)
VR5: Transmit
Audio (Radio A)