Post on 23-Dec-2015
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Office of Emergency Communications
Gateway Training Workshop
Module Three
Hands-on Configuration
Incident Commanders Radio Interface (ICR)
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Hands-on ConfigurationOverview
Specific Requirements & Capabilities Setup & Configuration Adjustments
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Specific Requirements & Capabilities
Power 6.5 to 20 VDC suggested sources:
12 or 24 volt vehicle battery Vehicle cigarette lighter 115VAC (with an external adapter) BA590 “military” Commercial dry-cell battery (12V or greater) C-AT 12 volt battery pack (uses 8 “AA” batteries
Note: that if eight “AA batteries are used, the ICRI will continue operate to nominally for at least 2 hours after the “OK” LED is extinguished, the “LOW” LED has lit and then extinguished
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Specific Requirements & Capabilities
VOLTAGE LED: OK “Green” lit: input voltage 8.6 or greater Low “Red” lit: input voltage 7.5 to 8.5 volts
Note: DC source voltage between 6.5 and 7.4 volts will not light either the OK or the LOW voltage LEDs but the ICRI will still function
“AA” Batteries
“AA” Bbatteries
Battery Tray
Key Tab Side
Key Tab
Battery Housing Case
Larger Label
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Setup & Configuration
As a minimum, the following will be required for ICRI operation: ICRI assembly Power supply with interconnect cable to ICRI Two radio interface cables Two radios
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Setup & Configuration Standard Application
Frequency/channel is agency defined, not stipulated by ICRI Radios supplied by individual supporting teams Connect through radios’ external speaker mic jack
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Setup & Configuration Interface Cables
You require the proper cable for the interface device you’re planning to use!
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Setup & ConfigurationNEXTEL Direct Connect Mode
(PTT Function)When connecting the phone as an LMR install the radio-end of the ICRI interconnect cable onto the accessory jack of the phone and attach the other end of the cable to any of the RADIO INTERFACE jacks
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Setup & Configuration ICRI Operation
Connect the radios to the ICRI with the proper interface cables
Turn the radios on; initially place the radio volume controls at a mid-position between fully counter-clockwise and fully clockwise. As a radio connected to the ICRI receives voice for a
remote radio user for the first time, adjust the radio’s volume control so that the associated LED flickers as words are spoken.
The LED should not remain on continuously as the voice is received
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Adjustments
The ICRI is designed to work with most conventional radio systems straight out of box. However system repeaters with long squelch tails and/or trunk systems may require additional adjustments
All of the adjustment are internal to the unit so the top panel must be removed
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AdjustmentsCircuit Board Layout
Input Blocking TimePrevents Ping-Pong
Time Out Timer Adjust
Time Out Timer Defeat
VOX Trail Time
VOX Threshold
MIC Output to Radio
Test Point
Audio DelayEnable/Disable
Audio DelayProgramming
Telephone Time Out Timer Defeat
Audio DelayPower Control
Test Point
Test Point Do not user
Input Blocking Time
Handset Power ControlPhone HandsetChannel 51 2 3 4
Delay Circuit
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AdjustmentsPer Radio Port
Input Blocking Time (JP) – Prevents Ping Ponging .8 Jumped / 1.8 Not Jumped
Time Out Timer Adjust – Factory set to 60 Seconds Time Out Timer Defeat (JP) – Turns off the Time Out
Timer (normally jumped) VOX Tail Time - keeps the audio path enabled
preventing the audio from being muted between syllables VOX Threshold - Factory set to activate with 1000 Hz
tone at -30 dBm injected into the front port Test Point (JP) – Audio Jumper to ICRI if removed the
audio signal will not be patched through the ICRI circuit MIC Output to Radio
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Audio Adjustments Ping Ponging
Ping Ponging is the effect when the radios in the patch begin bouncing between TX and RX with no signal present.
1. Connect all the radio interface modules together in one Net2. Using a remote radio key-up, speak, and release3. Watch the radio icon’s VOX LED. Whichever radio icon shows
activity first is the source of the problem4. Remove that radio an see if the problem goes away, if not remove
any addition problem radios5. Patch one on the problem radios back into the net, remove the
Input Blocking Time jumper for that port changing the delay from .8 to 1.8 Seconds, repeat step 2 to verify the problem is corrected
6. Repeat for the other problem radios7. Verify the problems are corrected by repeating steps 1 and 2
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AdjustmentsPer Radio Port - VOX
Internal adjustments – Factory adjusted and should not need adjustment in the field Voice Operated Transmit (VOX) or Voice activated switch –
algorithm will signal carrier present whenever the incoming audio exceeds a set threshold (amplitude)
VOX Threshold Low threshold is less likely to fail to detect speech but more likely to
false on noise High threshold is less likely to false on noise but will fail to detect some
speech Lower threshold should be used if noise is not excessive, Higher
threshold is used for open-squelch FM radios VOX Trail Time - keeps the audio path enabled for an adjustable
duration after the moment when speech is no longer detected preventing the audio from being muted between syllables or during pauses in speech
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AdjustmentsPer Radio Port - VOX
It creates events, performs certain tasks, and makes certain decisions based on the input parameter values entered.
VOX - needs defined parameters horizontal axis is time (VOX Trail Time) vertical axis is signal amplitude (VOX Threshold)
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AdjustmentsPer Talk Group
Audio Delays - used for trunked radios Trunked systems have a delay between when the radio’s PTT is
activated and when a channel is assigned Most systems signal this ready status by a confirmation tone,
which can not be relayed by the ICRI The Audio delay should be set to a duration that holds the TX
audio until the channel is selected so the first syllable is not clipped
Two Jumpers Audio Delay Enable/Disable – JP18 Audio Delay Programming – JP17
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AdjustmentsTalk Group Delays
ICRI Generation 3 Talk Group delays Used for Trunked systems
100-500 MSec – for Microcontrollers Marked : Delay.Hex
150-1022 mSec -for Microcontrollers Marked : Delay1 1Sec Max
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AdjustmentsTalk Group Delays
Delay Hex Delay1 1 Sec Max
JP 17
Delay Select Jumpers
JP 18
Activate/Bypass Delay Amount
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Questions
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