office of emergency communications gateway training workshop module three hands-on configuration...

Office of Emergency Communications

Gateway Training Workshop

Module Three

Hands-on Configuration

Incident Commanders Radio Interface (ICR)


Hands-on ConfigurationOverview

Specific Requirements & Capabilities Setup & Configuration Adjustments


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


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


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


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


Setup & Configuration Interface Cables

You require the proper cable for the interface device you’re planning to use!


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


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


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


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


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


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


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


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)


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


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


AdjustmentsTalk Group Delays

Delay Hex Delay1 1 Sec Max

JP 17

Delay Select Jumpers

JP 18

Activate/Bypass Delay Amount


Questions

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office of emergency communications gateway training workshop module three hands-on configuration...

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