The product information and design disclosed herein were originated by
and are the property of Telex Communications, Inc. Telex reserves all
patent, proprietary design, manufacturing, reproduction, use and sales
rights thereto, and to any article disclosed therein, except to the extent
rights are expressly granted to others.
COPYRIGHT NOTICE
Copyright 2008 by Telex Communications, Inc. All rights reserved.
Reproduction, in whole or in part, without prior written permission from
Telex is prohibited.
WARRANTY NOTICE (LIMITED)
All Telex manufactured signaling products are guaranteed against
malfunction due to defects in materials and workmanship for three (3)
years, beginning at the original date of purchase.If such a malfunction
occurs, the product be repaired or replaced (at our option) without
charge during the three (3) year period, if delivered to the Telex factory.
Warranty does not extend to damage due to improper repairs, finish or
appearance items, or malfunction due to abuse or operation under other
than the specified conditions, nor does it extend to incidental or
consequential damages. Some states do not allow the exclusion or
limitation of incidental or consequential damages. Some states do not
allow the exclusion or limitation of incidental or consequential damages,
so the above limitation may not apply to you. This warranty gives the
customer specific legal rights, and there may be other rights which vary
from state to state.
Web ..................................................................................www.telex.com
CLAIMS
No liability be accepted for damages directly or indirectly arising from
the use of our materials or from any other causes. Our liability shall be
expressly limited to replacement or repair of defective materials.
FACTORY SERVICE CENTER
Factory Service Center
Telex Communications, Inc.
Radio Dispatch Products
8601 East Cornhusker Highway
Lincoln, Nebraska, 68507
FIGURE 19. Line Type Drop Down Menu ..........................................................................................................50
FIGURE 20. Vocoder Type Drop Down Menu ...................................................................................................52
FIGURE 21. Vocoder Type Drop Down Menu ...................................................................................................54
FIGURE 22. Per Line Setup - Local, Tone, and Console Modes (view 1) ..........................................................56
FIGURE 23. Relay Drop Down Menu—Per Line Setup .....................................................................................59
FIGURE 24. Per Line Setup - Local Tone and Console Modes (view 2) ............................................................61
FIGURE 25. Serial Port Drop Down Menu - Local Mode .................................................................................64
FIGURE 26. Serial Port Params Drop Down Menu - Normal Mode .................................................................64
FIGURE 27. Per Line Setup - Local, Tone, and Console Mode (view 3) ...........................................................65
FIGURE 28. Tone Type Drop Down Menu .........................................................................................................66
FIGURE 29. ANI Call Type Drop Down Menu-Per Line Setup .........................................................................68
FIGURE 30. Per Line Setup - Phone Mode (view 1) ..........................................................................................69
FIGURE 31. Per Line Setup - Phone Mode (view 2) ..........................................................................................71
FIGURE 32. Serial Port Params Drop Down Menu - Phone Mode ...................................................................74
FIGURE 33. Per Line Setup - Phone Mode (view 3) ..........................................................................................74
FIGURE 34. Tone Type Drop Down Menu .........................................................................................................75
FIGURE 35. ANI Call Type Drop Down Menu ..................................................................................................77
FIGURE 36. Per Line Setup - iDEN Radio Mode (view 1) .................................................................................78
FIGURE 37. Relay Drop Down Menu-Per Line Setup .......................................................................................80
FIGURE 38. Call Type Drop Down Menu - iDEN Mode ................................................................................... 81
FIGURE 39. Per Line Setup - iDEN Mode (view 2) ........................................................................................... 81
FIGURE 40. Per Line Setup - Tetra Mode (view 1) ........................................................................................... 84
FIGURE 41. Relay Drop Down Menu ................................................................................................................ 85
FIGURE 42. Type Drop Down Menu - Tetra Mode ...........................................................................................86
FIGURE 43. Per lIne Setup - Tetra Mode (view 2) ............................................................................................ 87
FIGURE 44. Save to EEPROM .......................................................................................................................... 90
Table 67. Jumper Position ...................................................................................................................................19
Table 71. D, T, R Binary Reference .....................................................................................................................45
Table 72. Standard Function Tone Frequencies ................................................................................................114
Table 73. CTCSS Tone Frequencies ..................................................................................................................131
Table 74. Digital Output Values ........................................................................................................................133
Table 75. Supported Radio Dispatch Tone Frequencies ...................................................................................135
CHAPTER 1
Overview
The IP-223 Remote Adapter Panel provides a reliable means of remotely controlling two (2) audio devices. The adapter has
multiple modes allowing it to connect to both digital and analog consoles, and performs a variety of other tasks related to
putting radios on a digital network.
The IP-223 is interconnected to the distant remote control console(s) by means of any available WAN (Wide Area Network) or
LAN (Local Area Network) connection.
Operating Modes
The IP-223 is capable of operating each audio port in different modes:
Local Mode – The radio is connected directly to the IP-223 allowing for simple migration and local cont rol of the rad io.
Tone Mode – The IP-223, based on Ethernet traffic, generates the keytones required to control standard industry tone-
equipped radio circuits. This allows an existing tone decoder and radio to be connected. This mode also supports a parallel
analog console.
FIGURE 76. Local and Tone Mode Connections
13
Overview
•Ethernet TX and LINK LEDs
•PTT, Monitor, F1 and F2 relays (programmable to any
function tone or revert to F1)
•Four (4) PTT modes and three (3) monitor modes
•Nine (9) selectable PTT frequencies
•Seven (7) digital outputs for channel selection,
completely programmable per function tone
•CTCSS (Continuous Tone Coded Squelch System)
generation (64 frequencies)
•Hardware and software gain control
•Local handset port for monitoring activity and
transmission back to base or to radio
•RS-232C port on rear for initial configuration and
direct radio control
•Single function tone recognition (16 function tones)
•RX (Receive) audio squelch
•Crosspatch capability
• ANI (Automatic Number Identification) over-the-air-
protocol—decode and display
• Provides iDEN interface
• Supports Sepura SRM2000, TETRA radio
• E.F. Johnson RS5300 P25 radio interface
• Remote Crosspatch capabilities
• POTS line fail-over
• Phone line interface
• MDC and Fleetsync Decode
• 5/6 Tone signalling encode/decode
• Kenwood radios interface
Console Mode – Allows the use of existing tone-based consoles. The IP-223 decodes industry standard tones, converts it
to Ethernet traffic to another IP-223 that can be in tone or local mode.
FIGURE 77. Console Mode Connection
Phone Mode – Using a PIB (Phone Interface Box) or TDI (Telephone Dispatch Interface), a line on the IP-
223 is used to connect to an analog phone line.
iDen Radio Mode – Using the NI-223, allows interface with a Falcon Class PTT (Push-To-Talk) mobile phone
system.
TETRA Radio Mode – Used to interface to a TETRA digital trunked system using the IP-223 and the Sepura
SRM2000 mobile radio. The IP-223 interfaces the radio through the PEI (Peripheral
Equipment Interface) allowing dispatch access to TETRA radio assets.
Features
NOTE:The features listed below for the IP-223 version 4.100 do not comprise the full feature set. For more information
on all the features available, contact Radio Dispatch Sales listed on www.telex.com
.
14
Operating Modes
NOTE:Transient protection is provided near all audio inputs and outputs. The IP-223 line transformers are not designed
to operate on lines carrying DC (direct current). If a voltage is on the line, isolate with external capacitors. If the
line termination must conduct direct current, install a 600:600 Ohm transformer designed for the current
involved.
IP-223 Accessories
There are several optional accessories available for the IP-223:
Part NumberDescription
223RACK1 unit high rack shelf to hold up to two (2) IP-223 units
2490248Alignment Handset
730153Power Supply
301611000Fleetsync Over the Air Decode
301611004FleetSync Encode/Decode
301611001MDC Over the Air Decode
301912000NI-223
PRD000003000IP223 to EFJohnson 5300 Mobile Radio Advanced Control Interface Box
301953000IP223DB9Splitter - Serial Port splitter cable DB9
301956000IP223CAB150/180 - IP223-Kenwood TK-150/180 cable
301957000IP223CAB90 - IP223-Kenwood TK-90 cable
301969000IP223CABCDM1250 - IP-223-Motorola CDM and GM cable
301961000IP223CAB2000 - IP-223-Sepura SRM2000 cable
879794IP223CAB Tone - IP-223-Dual DB25 Tone cable 24ft.
15
Overview
Test and
adjustment points
Handset
jack
LCD displayIC button
Line button
TX LED
LNK LED
IP-223 Specifications
The specifications for the IP-223 are listed in Table 1. The specifications are subject to change without notice.
CAUTION:
TABLE 1. IP-223 Specifications
This device is NOT PoE (Power Over Ethernet) compatible.
Operating Temperature Range 0 to 70°C for full specifications
Power Requirements +12 to +16Vdc, semi-regulated, ~700mA
Ethernet Speed 10 BaseT or 100 BaseTX
Lease Lines 2W and 4W supported
Radio Interface ±45VDC withstand rating
Relay Contact Ratings 1A at 125Vac
Non-Relay Outputs Open collector, active low, 200mA maximum, 40V collector to emitter voltage
Radio Input Level 10mVpp to 10Vpp, adjustable
Radio Output Level 10mVpp to 10Vpp for mic level or -40 to +10dBm into 600Ω load, adjustable
Radio Output Impedance 600Ω for balanced mode, 200Ω for single ended mode
Frequency Response ±1.5dB, 300 to 3000Hz
Audio Distortion 2% THD maximum
DTMF Detection Bandwidth ± 25 Hz around center of frequency
MON timer 10ms to 9999ms, adjustable
Dimensions 8 ½” (215.9mm) Wide, 9 3/4” (247.65mm) Deep, by 1 5/8” (41.275mm) High
Actual Weight 3.75lb (1.701kg)
Shipping Weight and Dimensions 5lbs (2.267kg) ~ 12”(304.8mm) x 10”(254mm) x3”(76.2mm)
Front Panel
FIGURE 78. IP-223 Front Panel
Test and Adjustment Points
T est and adjustment points for Radio 1 and Radio 2 are provided on the front panel. Newer versions of the IP-223 provide
access to additional test and adjustment points on the case top, as shown in Figure 79.
16
Front Panel
NOTE:Radio 1 and radio 2 are also referred to as line 1 and line 2 in this manual.
FIGURE 79. IP-223 Case Top Test Points
Handset Jack
An optional handset is available for the IP-223. When the optional handset is plugged into the handset jack, the abili ty to
monitor and talk on either line is available. The handset jack is located on the front of the unit, see Figure 78. When the
handset PTT switch is pressed, the selected radio connected to the IP-223 is keyed up on the existing frequency and the
handset microphone audio is transmitted.
Ethernet audio is also generated on the TX multicast and port for the selected line. This functionality can be used to test both
the Ethernet network and the analog connection.
IC Button
The IC button, when pressed, sends audio from the handset microphone back through the IP Network on the selected TX
multicast and port. It also sends audio to the transmit lines of the IP-223 without keying up the radio. This means no PTT relay
in local mode and no EIA (Electronic Industries Association) tones in tone mode.
NOTE:A handset is required to use the IC button.
LCD Display
The LCD display provides panel status information, such as the IP and subnet addresses, line status, and handset line selection.
•TX F# (# is the selected function tone) indicates a PTT is active.
•RX F# (# is the selected function tone) indicates the RX radio is active.
•ID # displays when a Fleetsync or MDC ANI ID is decoded. This does not include serial decoding.
17
Overview
•When connected to a serially controlled radio, iDEN, Sepura, Kenwood or Johnson displays.
•INTCOM displays when the front panel IC button is pressed.
•EnetIC displays when the console generated intercom is received.
•CTX F# displays when the console mode IP-223 decodes tones from a tone console in Console mode.
•CRX F# displays when the IP-223 transmits wire-line audio to a legacy tone console in Console mode.
•PTX F# displays when the IP-223 decodes tones from a legacy tone console attached in parallel in Tone mode.
•CPT F# displays when the IP-223 transmits to a line if the line-to-line crosspatch is enabled.
•Ring displays when there is an incoming phone call in Phone mode.
•Offhook displays when the line is in use during a phone call.
•LLM displays when no phone line is connected to the PIB or TDI in Phone mode.
•NO LINE ENABLED displays after power-up if neither line is enabled.
•Scan List.... displays during power up while the IP-223 is communicating with serial controlled radios that
support the Scan List feature.
To toggle the LCD display, do the following:
1.Press and hold the line button and then momentarily press the IC button.
Three different displays are available with each press of the IC button:
•While pressing the line button, press the IC button once.
The IP Address and Mask Address of the unit displays.
•Continue to hold the line button, then press the IC button a second time.
The TX alignment tones are turned ON.
•Continue to hold the line button, then press the IC button a third time.
The RX VU meter displays.
2.Press the IC button a fourth time to clear the display and return to the normal LCD display.
3.Release the line button.
Line Button
The Line button is used to select which radio, or line, the handset audio is routed and which line is being monitored. The
handset line selection is displayed as an asterisk (*) in the right m ost column of the LCD display. An asterisk (*) on the top
line of the display indicates a connection to line 1, and an asterisk (*) on the bottom line of the display indicates a connection
to line 2.
TX LED
The TX LED provides a visual indication the IP-223 is generating IP packets. When the LED is illuminated, packets are being
transmitted to the network.
LNK LED
The LNK LED provides a visual indication of the Ethernet connection. When the LED is illuminated, a valid network
connection is established.
18
Back Panel
10/100
Ethernet
connector
Serial
connector
(DB9)
Radio 1 and radio 2
connectors (DB25)
Power
connection
Back Panel
FIGURE 80. IP-223 Back Panel
10/100 Ethernet Connector
The 10/100 Ethernet connector provides the LAN or WAN connection for the IP-223.
Serial Connector
The serial connector (DB9) is used for either of the following:
•To program an initial IP Address into the IP-223 unit, if the IP Address cannot be programmed through the
Ethernet port on the installed system.
NOTE:To communicate with HyperTerminal, the jumper setting must be RS-232.
•To provide serial communication to various radios. Both radio (or line) 1 and radio (or line) 2 are supported on
this connector, with the appropriate splitter cable.
NOTE:You must adjust the position of the jumper, on J35 when using line 1, or on J26 when using line 2, according to
the serial connection type for the radio interface shown below. See “Jumper Positions” on page 25 for more
information.
Radio 1 and Radio 2 (Line 1 and Line 2) Connectors
Two (2) DB25 connectors are provided for connection to various audio devices. The pinouts shown in Table 4 are used when
custom cables need to be fabricated.
Power Connection
The IP-223 requires +12 to +16VDC, ~700mA of clean power. A 3-pin screw terminal receptacle is provided on the right rear
of the unit, pin 1 is the positive terminal, pin 2 is the ground terminal, and pin 3 is the earth ground terminal.
As with all communication equipment earth ground should be used. Earth ground is a low impedance path to earth for the
purpose of discharging lightening, static, and radiated energy.
Designing an IP-223 system requires an understanding of the radio network and how the various radios and communication
equipment are connected.
The first step in designing an IP-223 system is to create a roadmap of the radio, console, and any other communication
equipment locations. This roadmap must include the following:
•Multicast addresses for each channel of TX (transmit) and RX (receive) communication.
•Port numbers for each channel of TX and RX communication.
•Base IP Addresses assigned to each console and IP-223 on the network.
Network Requirements
Bandwidth
Each VoIP channel requires 50kBit of bandwidth while active. Full-duplex conversation (audio in each direction) requires
100kBit of bandwidth.
NOTE:Most radio voice communications are half-duplex (only in one direction at any one time), thus requiring 50kbits.
Some radio systems transmit go-ahead beeps when it is clear to talk. In order for the console operator to hear the beeps, the
system must support full-duplex communication. Full-duplex bandwidth may only be required for the first few seconds of a
conversation, due to the brief nature of the go-ahead beeps at the beginning of the transmission.
When using a PIB, TDI, C-6200, or the NI-223 for a telephone connection, 100kBit is required since it is a constant, fullduplex conversation.
Multicast
In general, Telex systems require multicast to function. The network must be able to support the multicast traffic generated by
the system.
It is very common for networks to enable multicast after an IGMP (Internet Group Management Protocol) join message is sent
out, and then prune off branches after a period of time. Due to the intermittent usage patterns of two-way radios, such a system
can appear to work flawlessly for a period of time, then no longer work.
23
Communications System Design
NOTE:When using Cisco technology, IP PIM dense mode is generally recommended. Generally speaking, sparse-
dense-mode can also be implemented effectively. We recommend explicitly joining the multicast group wit h an
IP IGMP static-join X.X.X.X command. For more information on Cisco and IGMP, visit www.cisco.com
Internet Group Management Protocol (IGMP)
IGMP can be used to control where multicast is allowed to propagate. When a console on the subnet is expected to be
continually operational, multicast must be active for that subnet at all times.
Network Performance
Networks should perform well under any loading conditions. The default audio delay is 120ms, plus any delay added by the
network. While delay alone does not cause issues, variable delay (jitter) does. Jitter in a network cannot exceed the
maximum packet buffer of any individual product buffer. Refer to the individual product manuals for these specifications. For
example, the IP-223 can handle approximately 600ms of network jitter.
NOTE:Losing more than 5% of the total packets transmitted compromises audio quality and system performance.
Optimally, packet loss should be less than 1%.
24
CHAPTER 3
Installation and Level Settings
Local/Radio Connections
NOTE:Connections to radios differ from connections for remote operation; therefore connections are discussed
separately.
Jumper Positions
An example of the jumper positions are shown in Figure 82. In the figure, jumper 14 (J14) is shown in posi tion A, jumper 3
(J3) is shown in position B, and jumper 23 (J23) has been placed on the center pin indicating the jumper is in the NULL
position.
FIGURE 82. Jumper Positions
To adjust the position of a jumper, do the following:
1.Remove power from the IP-223 unit.
CAUTION: Failure to remove power may cause damage to the IP-223.
2.Remove the six (6) screws from the case top.
25
Installation and Level Settings
Case topPCB assembly
3.Carefully slide the case top forward past the IC and LINE buttons, and then lift up to gain access to the PCB (Printed
Circuit Board) as shown in Figure 83.
FIGURE 83. IP-223 PCB Assembly
4.Locate the desired jumper on the PCB assembly and use needle nose pliers to adjust the jumper, if necessary.
5.Carefully lift up the case top and place it into position on the chassis bottom.
6.Secure the case top into position using the six (6) screws.
7.Connect power to the IP-223 unit.
26
Local/Radio Connections
TX Audio Connection
The IP-223 has a number of options when connecting to the radio. Different jumper settings are required for different
revisions of the PCB installed in the IP-223 unit, and are noted below. Set the jumper position listed for the line according to
the connection type shown below.
If the radio transmit audio output is balanced,
•connect to pins 13 and 25 of the DB25 connector.
If the transmit audio is single ended,
•use pin 25 of the DB25 connector.
NOTE:Shielded cable is recommended.
PCB 750743 or PCB 750630 revision C and higher
Line 1 jumpers: J3, J9, and J11
Line 2 jumpers: J25, J28, and J29
Jumper PositionConnection Type
ASingle Ended Low-Impedence
BBalanced 600 ohm
RX Audio Connection
To connect the radio receiver audio to the IP-223, different jumper settings are required for different revisions of the PCB
installed in the IP-223 unit, and are noted below. Set the jumper position for the line according to the connection type shown
below.
•If the radio receiver audio output is balanced, connect to pins 12 and 24 of the DB25 connector.
•If the receiver audio is single ended, use pin 24 of the DB25 connector. The audio source must be after the
squelch circuit to prevent sending continuous noise to the remote console.
•If a high-impedance point in the receiver is used, a shielded cable is recommended.
PCB 750743 or PCB 750630 revision C and higher
Line 1 jumpers: J16 and J21
Line 2 jumpers: J19 and J20
Jumper PositionConnection Type
ASingle Ended Low-Impedence
BBalanced 600 ohm
27
Installation and Level Settings
Jumper Position
Line 1Line 2
Receive Input Impedance:J14J24
8 ohms (for a speaker input)BB
600 ohmAA
10k ohmNULLNULL
NOTE:When the speaker output is used, the radio volume control affects the audio levels of the IP-223.
Jumper Position
Line 1Line 2
Receive Input Impedance:J14J23J17J24
8 ohms (for a speaker input)BAAB
600 ohmABBA
10k ohmBBBB
COR (Carrier Operated Relay) I/O (Input/Output)
The COR I/O connection indicates that audio is being received from the radio. The COR connection is provided at DIG6, pin
20 of the DB25 connector.
PTT Connection
Connect the radio PTT circuit to the PTT relay contact terminals on the DB25 connector. Usually the common of the relay
contact switch is grounded and the normally open contact connects to the PTT input. An alternative method to ground the
common of the relay internal to the unit is to jumper R377 (line 1) and R381 (line 2) with a piece of wire soldered closed.
Monitor Connection
Connect the radio MON circuit to the MON relay contact terminals on the DB25 connector. Usually the common of each relay
contact switch is grounded and the normally open contact connects to the MON input. An alternative method to ground the
common of the relay internal to the unit is to jumper R376 (line 1) and R380 (line 2) with a piece of wire soldered closed.
R1 and R2 Relays
The IP-223 provides two (2) relay closures for controlling the frequency of the radio, or switching a remote ancillary device.
The F1 and F2 contacts can be connected through the DB25 connector. Usually the common of each relay contact switch is
grounded and the normally open contact connects to the radio frequency control terminals. Information on prog ram mi ng the
R1 and R2 relays is provided in the “Setup Information” chapter of this manual starting on page 33. An alternative method to
ground the common of the relay R1 internal to the unit is to jumper R375 (line 1) and R379 (line 2), and for relay R2 jumper
R374 (line 1) and R378 (line 2) with a piece of wire soldered closed.
28
Tone/Console Operation
Digital I/O
In addition to the two standard relay closures, seven (7) lines of digital I/O are also included. These lines are open-collector
transistor outputs. They can be programmed on a per line basis to generate any of 128 combinations. They pull down to ground
and can be jumper selected to pull up to either +5V or the power supply voltage (minimum +12V).
Jumpers J8 (line 1) and J30 (line 2) are used to select the pull up voltage. Jumper position A pulls up to +5V and jumper
position B pulls to the power supply value.
NOTE:Some radios provide a pull-up voltage. When this occurs, place the jumper into the null position. Information on
programming the digital I/O lines is provided in the “Setup Information” chapter of this manual starting on
page 33.
CTCSS (Continuous Tone Coded Squelch System) Connection
The IP-223 connection can be used for a recorder output or as a CTCSS output:
Recorder output - The analog audio is generated at the connection.
CTCSS output - Each function tone can be assigned a CTCSS number which corresponds to a CTCSS frequency. See
“CTCSS Tone Frequency Table” on page 131.
Tone/Console Operation
T one and Co nsole op eratio n require jumpers set to specific locations. The following section discusses the jumper settings. See
“Jumper Locations” on page 125.
2-/4-Wire Jumper Settings
2-Wire / 4-Wire Selection:Line 1Line 2
2-Wire A positionJ33 and J34J5 and J6
4-Wire B positionJ33 and J34J5 and J6
The RX termination J14 (line 1) and J24 (line 2) should be placed in jumper position A on 4-wire systems for a single unit at
the end of a line. If multiple units are connected in parallel, only one (1) unit should have the RX termination jumper in the A
position. The RX termination jumper should be in the null position on the rest of the units.
For 2-wire operation:
•PCB 750743 or PCB 750630 revision C and higher - Set J14 or J24 to the NULL position.
TX Side Settings
PCB 750743 or PCB 750630 revision C and higher
T wo (2) jumpers on the transmit pair allow a degree of control over the output impedance. The jumper positions for each line,
depending on how many consoles are placed in parallel, are shown below.
NOTE:PCB 750630 revision A does not have these jumpers.
29
Installation and Level Settings
Jumper Position
Line 1Line 2
Consoles in Parallel:J17J22J10J15Output Impedance
1BBBB600 ohms
2ABAB1200 ohms
3BABA1800 ohms
4AAAA2400 ohm s
Local PTT I/O
The Local PTT I/O is used to generate TX Ethernet traffic on a local keyed system as opposed to the 2175Hz detection on a
tone keyed system. The input is at DIG5; pin 23 of the DB25 connector. The TX condition is caused by an active low.
Cross Mute I/O
Cross mute information to local consoles is provided at DIG0, pin 8 of the DB25 connector.
Supervisory I/O
Supervisory information to and from consoles is provided at DIG1, pin 21 of the DB25 connector. The supervisory I/O is both
an input and an output.
Supervisory input and output in console, tone or local mode behaves as follows:
Console Mode – Input - An Ethernet packet supervisor is sent on detection.
Output - When an Ethernet packet is received. The line level is set.
While under supervisory control, TX traffic from the Ethernet to the console is muted. The console’ s
audio to the Ethernet is muted. Handset PTT and the IC button are disabled.
Tone Mode – Input - An Ethernet packet supervisor is sent on detection.
Output - When an Ethernet packet is received, the line level is set.
When an Ethernet packet is received, the line level is set.
Local Mode - Input- No affect on I/O.
Output - No affect, when Ethernet packet is received.
While under control, manual PTT and the IC button are disabled.
NOTE:Information on programming the supervisory I/O is provided in the “Setup Information” chapter of this manual
starting on page 33..
Level Adjustments
Once the IP-223 unit is connected to the system, the level potentiometers can be set. Access to test and adjustment points on
newer versions of the IP-223 are provided through labeled openings on the case top and on the front panel of the unit. On older
versions of the IP-223, access to some of the test and adjustment points is provided through labeled openings on the front
panel; however, the case top needs to be opened to access the other test and adjustment points.
30
Level Adjustments
General Alignment
The IP-223 has a TX alignment tone and an RX alignment VU meter accessible from the front panel of the unit.
•Press and hold the line button and then momentarily press the IC button twice to generate the 1kHz 0dB TX
alignment tone on both lines.
•Press and hold the line button and then momentarily press the IC button three times to display the RX VU
meters.
Radio/Line TX Level
The Radio 1 TX test points (TP2 and TP6) and the Radio 2 TX test points (TP8 and TP9) are located on the front panel of the
IP-223. These provide a point to measure the actual signal being placed into the radio or balanced TX line. The front panel
accessible adjustment Radio 1 TX potentiometer (R47) and Radio 2 RX potentiometer (R61) are used to adjust these levels.
NOTE:If the unit is placed into single-ended mode, the radio TX+ should be measured with respect to ground.
It is also possible to place jumper J9 (line 1) or J26 (line 2) into the A position to decrease the output of the TX line by a factor
of 10. The final adjustment should allow for undistorted audio to be transmitted for the full range of transmission levels at the
desired deviation. This can be accomplished by turning on the TX alignment tone and adjusting the TX output to 0dB, as
measured into a 600 ohm load.
Radio/Line RX Level
Standard Alignment Procedure for a 2- or 4- wire System:
•Inject a 0dBm test tone on the RX pair (4-wire pins 12 and 24: 2-wire pins 13 and 25).
•Measure the RX level on test point TP13 for lin e 1 or TP1 for line 2.
•Adjust potentiometer R175 for line 1 or potentiometer R110 for line 2 until 0dBm is measured between the test
point and GND. (0dBM = 2VPP = .707VRMS)
•Detune slightly 1-2dBm to provide overhead for large transients.
•AGC (Automatic Gain Control) compression potentiometers RV5 for line 1 and RV1 for line 2 control the
aggressiveness of the AGC circuitry, if enabled. The AGC can be used to enhance the gain capabilities of the RX
circuitry. Set RV5/RV1 fully clockwise and, if required, back off 10 to15 degrees maximum.
•Use the RX alignment tool (VU meter) accessed through the LCD display (press and hold the line button and
then momentarily press the IC button 3 times) to verify the dBm level. The reading should be 0dBm with the
AGC turned off. If the AGC is ON, it is likely the RX alignment software always displays 0dBm, the targeted
level for the AGC circuitry.
Line TX Monitor Level (Tone and Console Mode only)
PCB 750743 or PCB 750630 revision C and higher
The Line TX Monitor Level adjustment is used when the IP-223 is connected to consoles set in 4-wire mode. This allows for
local TX audio to be sent back on the Ethernet and played at other consoles so both sides of the radio traffic can be heard. The
alignment for TX monitor is similar to 4-wire RX alignment.
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Installation and Level Settings
To adjust the TX monitor, do the following:
1.In the options section of the Per Line Setup window, select the TX Monitor.
NOTE: If this feature is not necessary, or the line is in 2-wire mode, the TX Monitor field in the Options section on
the Per Line Setup window should be cleared.
2.Verify the RX alignment is completed first.
To perform a standard alignment for a 4-wire system, do the following:
1.Transmit a 0dBm test tone on the TX audio pairs pins 13 and 25.
2.Measure the RX level on test point TP13 for line 1 or TP1 for line 2.
3.Adjust potentiometer R390 for line 1 or potentiometer R391 for line 2 until 0dBm is measured between the test
point and GND. (0dBM = 2VPP = .707VRMS).
NOTE: Do not adjust the RX potentiometers.
4.Use the RX alignment tool (VU meter) accessed through the LCD display (press and hold the line button and then
momentarily press the IC button 3 times) to verify the dBm level.
CTCSS Level
The CTCSS level is measured by connecting an oscilloscope or RMS meter to ground and Radio 1 CTCSS test point (TP7) or
Radio 2 CTCSS test point (TP10). With the radio connected to the CTCSS output, have the remote console open to receive
audio so CTCSS is present. Adjust the Radio 1 CTCSS potentiometer (R50) or Radio 2 CTCSS potentiometer (R53) until the
desired level is achieved.
Frequency Decoding
The IP-223 is factory tuned to the frequencies shown below. The detection frequencies cannot be changed as they are coded
into the software. However, any actual function or output can be made to work with any existing programmed frequency.
Please consult the factory for special requirements for frequency selections.