Transcript Module 3 - ICRI

Gateway Training
Workshop
Module Three
Hands-on Configuration
Incident Commanders Radio
Interface (ICR)
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Hands-on Configuration
Overview
 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
“AA” Batteries
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
Larger Label
Key Tab
Key Tab Side
Battery Housing Case
Battery Tray
“AA” Bbatteries
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Setup & Configuration
 As a minimum, the following will be
required for ICRI operation:
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ICRI assembly
Power supply with interconnect cable to ICRI
Two radio interface cables
Two radios
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Setup & Configuration
Standard Application
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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 & Configuration
NEXTEL 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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Adjustments
Circuit Board Layout
Delay Circuit
Input Blocking Time
Prevents Ping-Pong
Audio Delay
Enable/Disable
Time Out Timer Adjust
Time Out Timer Defeat
Audio Delay
Programming
VOX Trail Time
Telephone
Time Out
Timer Defeat
VOX Threshold
Audio Delay
Power Control
Test Point
Test Point
Test Point
Do not user
MIC Output to Radio
Input Blocking
Time
Channel
1
2
3
4
5
Phone
Handset
Handset Power Control
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Adjustments
Per 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 Net
2. Using a remote radio key-up, speak, and release
3. Watch the radio icon’s VOX LED. Whichever radio icon shows
activity first is the source of the problem
4. Remove that radio an see if the problem goes away, if not remove
any addition problem radios
5. 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 radios
7. Verify the problems are corrected by repeating steps 1 and 2
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Adjustments
Per 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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Adjustments
Per 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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Adjustments
Per 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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Adjustments
Talk 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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Adjustments
Talk Group Delays
Delay Hex
Delay1 1 Sec Max
Delay Select Jumpers
Activate/Bypass
Delay Amount
JP 18
JP 17
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Questions
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