Related Manuals for E.F. Johnson LTR-Net 7243
Summary of Contents for E.F. Johnson LTR-Net 7243
- Page 1 SERVICE MANUAL TRUNKED PORTABLE RADIO LTR-N 7243 ™ UHF P ORTABLE 7.5VDC 1 and 4 Watts Part No. 242-7243-xxx First Issue November 2001...
- Page 2 Project 25 digital radio products. ® ™ ® Viking Head/EFJohnson logo, LTR , LTR-Net , and Call Guard are trademarks of the ™ ®...
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Page 3: Table Of Contents
TABLE OF CONTENTS TABLE OF CONTENTS GENERAL INFORMATION Option Select......2-11 Power Select ......2-11 Proceed (Clear-To-Talk) Tone . - Page 4 TABLE OF CONTENTS TABLE OF CONTENTS (CONT’D) 2.12 SUPERVISORY TONES ....2-28 TRANSFER MENU ....3-11 General Tones.
- Page 5 TABLE OF CONTENTS TABLE OF CONTENTS (CONT’D) Limiter (U151A)......4-10 Introduction ......6-3 Low-Pass Filter (U146A/B) .
- Page 6 TABLE OF CONTENTS TABLE OF CONTENTS (CONT’D) LIST OF TABLES LIST OF FIGURES 7243 Portable Accessories ....1-1 Battery Charger ......1-4 Charger Indicators .
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Page 7: General Information
585-7200-032 1.3 PART NUMBER BREAKDOWN Extension Test Cable Contact Cust Serv Programming Accessories The following is a breakdown of the part number LTR-Net 7243/98xx programming 023-9998-457 used to identify this transceiver. software, CD PCTune software and test code, CD 023-9998-489 242 - 72 x 3 - x x 3 PCFlash soft. -
Page 8: Factory Customer Service
RPI and must be ordered separately. FAX: (507) 835-6969 Programming Software E-Mail: customerservice@efjohnson.com You can also e-mail a person directly if you know their first The following three types of programming can be initial/last name (example: jsmith@efjohnson.com). -
Page 9: Replacement Parts
Service Department. RA numbers are required for systems, and regulations. The address is exchange units or if the Field Service Department http://www.efjohnson.com. wants to be aware of a specific problem. If you have 1.11 DISASSEMBLING TRANSCEIVER been given an RA number, reference this number on the Factory Repair Request Form sent with the unit. -
Page 10: Battery Charger Information
GENERAL INFORMATION Table 1-2 Charger Indicators 1.12 BATTERY CHARGER INFORMATION Indicator 1.12.1 GENERAL Indication Fast Charge Slow Charge The battery pack for the 7243 portable contains Flashing Red [1] Checking battery six nickel metal hydride (NiMH) batteries connected condition in series. Nominal battery pack voltage is 7.5 volts and Constant Red Rapid charge mode battery capacity is 1450 mAH. -
Page 11: 7243 Specifications
GENERAL INFORMATION 7243 SPECIFICATIONS The following are general specifications intended for use in testing and servicing the transceiver. For current advertised specifications, refer to the 7243 product information sheet available from your E.F. Johnson sales repre- sentative. Specifications are subject to change without notice. GENERAL Operating Mode LTR-Net/LTR (trunked), and conventional (non-trunked) -
Page 12: Operation
OPERATION SECTION 2 OPERATION • Menu mode to select functions Antenna Jack Option • On-Off/Volume Telephone mode for convenient number dialing Switch 1 • Three programmable option switches • Keypad lock (with and without password) • Call indicator • Time-out timer •... -
Page 13: Controls And Display
OPERATION Phone Group Scan System Scan List Group Not Used Used Monitor List Dial Mode Power Scan Call Priority BUSY UID/Aux Transmitter 8-Character Alphanumeric Battery Group Keyed Used Display Conv Ch Keypad Busy Lock Figure 2-2 Display 2.2 CONTROLS AND DISPLAY 2.2.2 SIDE CONTROLS Option Switch 2... -
Page 14: Front Panel Keys
OPERATION - Not currently used. L - Indicates that low transmit power is selected (see Section 2.4.8). - Indicates that the scan mode is selected (see Section 2.6.1). - Not currently used. C - Indicates that a call has been received on a group programmed for a call indicator (see Section 2.4.2). - Page 15 OPERATION Dial Mode FCN DIAL - Exits the dial mode without sending RCL - After recalling a number, scrolls through the call termination characters. other numbers programmed in memory. FCN RCL (0-9) - Recalls the number stored in the 4 (PAGE) specified memory location.
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Page 16: Basic Operation
OPERATION Dial Mode - Selects the next higher system (see 8 - Dials the “8” digit. preceding “SYS” key description). FCN SEND - Automatically transmits the number - Selects the next higher group (see in the display (after the system has been accessed preceding “GRP”... -
Page 17: System/Group Display Mode
OPERATION 2.3.4 SYSTEM/GROUP DISPLAY MODE press GRP . As when selecting a system, holding key down causes the function to repeat, and Two system/group display modes can be selected. after the lowest system or group is selected, wrap- One is a numeric format and the other is an alpha tag around occurs. -
Page 18: Low Battery Indication
OPERATION NOTE: This password is not preprogrammed and locality programmed for one of these modes. The type there is no override procedure. Therefore, if it is of operation that is programmed is determined by the forgotten, the transceiver must be reprogrammed to type of repeater equipment being accessed. -
Page 19: Localities, Systems, And Groups
OPERATION To manually monitor a conventional channel unique alpha tag and can have a different display before transmitting to determine if it is being used by number in each bank (see Section 2.4.1). someone else, proceed as follows: LTR-Net and LTR systems are programmed with Using Busy Indicator - With scanning disabled and the home repeater number, a collection of groups, and the squelch control adjusted as described in Section... -
Page 20: Placing And Receiving Standard Group Calls
OPERATION • Conventional Group Types If the radio system could not be accessed because of an out-of-range condition or some other Only dispatch calls can be programmed with reason, the intercept tone sounds (see Section conventional operation. Conventional groups select 2.12) and “NO ACCES”... -
Page 21: Call Indicator
OPERATION Milwaukee. Up to sixteen banks can be programmed, system and group of the last call are displayed. Other- and each bank is identified by a unique alpha tag. wise, the currently selected system/group is displayed. Banks are selected by the BANK menu Call Indicator parameter. -
Page 22: Encryption
OPERATION • 2.4.5 ENCRYPTION To enable it on conventional calls, check the “Conventional Enabled” box in the same screen. Encryption is currently not available. The proceed tone normally sounds almost imme- 2.4.6 HOME SYSTEM/GROUP SELECT diately when the PTT switch is pressed. However, with some calls, such as wide area, the user should wait a The Home Select feature provides a home short time after pressing the PTT switch before... -
Page 23: Tone Select
OPERATION Table 2-1 Menu Mode and Option Switch Functions Function Menu Item Option Switch See Description in Section: Backlight mode select BACKLGHT 2.3.2 Bank select BANK SEL 2.4.1 Display mode S/G DISPL 2.3.4 Monitor mode 2.11.2 Roaming on-off [3] ROAMING 2.9.4 Scan type select SCN TYPE... -
Page 24: System And Group Scanning
OPERATION and then programming a default condition in the exited 2 seconds after a change is made or 8 seconds menu mode programming screen. However, if a after no changes are made. parameter can be changed by an option switch or 2.6 SYSTEM AND GROUP SCANNING menu parameter, the default condition is maintained only until the first time it is changed (cycling power... -
Page 25: Scan Types
OPERATION display mode selected, the system number is replaced detected, registration on that site occurs and only LTR- by dashes and likewise for the group number when Net systems are again scanned. This operation can group scanning is occurring. provide uninterrupted operation when traveling through areas which have not yet been converted to When the alpha tag display mode is selected, LTR-Net operation. -
Page 26: Conventional Mode Scanning
OPERATION 2.6.6 CONVENTIONAL MODE SCANNING Deleting a system only temporarily deletes the groups associated with that system because when a As with LTR mode scanning, if a conventional system is added back into the scan list, the original system is selected with roaming disabled, only group scan list is again active. -
Page 27: Transmitting In The Scan Mode
OPERATION Scan Continue Timer respond to a call without having to manually change the system/group. To return to the previously selected The scan continue timer controls the maximum system/group, it must be manually selected using the time that a call is received before scanning resumes. SYS and GRP keys or FCN HOME if it was the home This prevents scanning from being delayed for long system/group. -
Page 28: Selecting Dial Mode
OPERATION 2.7.4 SENDING THE NUMBER 1. Access the radio system by briefly pressing the PTT switch. Access the radio system by briefly pressing the 2. When a dial tone is heard, dial the desired number PTT switch. Then when a dial tone is heard, send the while pressing the PTT switch. -
Page 29: Recalling Numbers From Memory
OPERATION 2.7.6 RECALLING NUMBERS FROM MEMORY To receive a standard group call, the group programmed with the ID code being transmitted must From Specific Location - FCN RCL 0-9 (location be selected or scanned. Calls with a higher priority number) than the selected group are always received as described in Section 2.8.2. -
Page 30: Block Id Codes And Access Priority
OPERATION can be programmed as not interruptible. This has the access). The preceding section describes receive same affect as programming it with a “1” priority. priority which controls what calls are received. However, if this was done instead of programming it 2.8.4 TRANSMIT INHIBIT as not interruptible, calls on that group would interrupt all other lower priority calls which may not be... - Page 31 OPERATION Mobile Disable, and Reassignment are originated by The Directed Group call is received as a standard the system operator or a dispatcher. Special LTR-Net group call because it is converted to that type by the calls use the special call group ID codes from 240-254. switch.
- Page 32 OPERATION 3. If placing a unique ID or directed group call, select indicate that the number was accepted by the the auxiliary group in the normal manner using the system. If this beep does not sound, an unauthorized GRP key. Then select the dial mode by pressing number may have been dialed or a dialing mistake FCN DIAL.
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Page 33: Busy Queuing/Free System Ringback
OPERATION Landside-Originate Special Calls message occurs when the PTT switch is released after dialing the digits. Calls can be also be made from any landside tele- phone to specific mobiles (Unique ID calls) or groups If resources then become available, ringback is (Directed Group calls). - Page 34 OPERATION mobile’s unique ID and the home repeater to be used. new LTR-Net locality is displayed. The new system is The registration information is forwarded to the Call the next higher system with a different locality that Processor which then knows its location. This auto- could be accessed.
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Page 35: Over-The-Air Locality Channel Updates
OPERATION 2.9.7 HOME CHANNEL ALIASING Capture Percentage - This is the percentage that squelch is tightened on the second and later passes when searching for a new locality (LCL SRCH Introduction displayed). This parameter should always be greater than or equal to the Dropout Percentage, and it ensures The home channel aliasing feature increases the that registration occurs on a stronger locality. -
Page 36: Ltr Features
OPERATION Repeater Number Programming With Aliasing make a call, the transceiver enters the telephone operating mode. Since the next lower numbered repeater is moni- tored when a system with a non-existent home repeater To place an LTR telephone call, a telephone is selected, a numbering scheme should be used that group must be selected, and to receive an LTR tele- equalizes, as much as possible, the gaps between the... -
Page 37: Ltr Features Not Available
OPERATION 5. When the other party answers, press the PTT switch seconds must elapse between digits or the call is and respond. The PTT switch must be pressed to talk terminated. and released to listen the same as with standard group calls. -
Page 38: Transmit Disable On Busy
OPERATION with an LTR-Net or LTR system selected, scanning 1. Select a conventional system and group that is not halts and “NOT CONV” is displayed, but monitoring busy. is not enabled. Refer to Section 2.3.11 for more infor- mation on channel monitoring. 2. -
Page 39: External Encoders And Decoders
OPERATION option to disable the reverse burst or turn-off code on data scheme used. The number specified when the transmit channels programmed with Call Guard code is programmed is actually a seed for a special squelch. The reverse burst or turn-off code are always algorithm used to generate the 23-bit data word. -
Page 40: Ltr-Net Special Call Tones
OPERATION 2.12.2 LTR-NET SPECIAL CALL TONES Intercept Tone - This is a siren-like tone (alternating high and low tones) consisting of 700 Hz and 800 Hz tones alternating at approximately a 2 Hz rate. This NOTE: The following tones are produced by the LTR- tone indicates the following no access and error Net switch and are heard only when placing special conditions:... -
Page 41: Display Messages
OPERATION respond to your transmission. It sounds when you LCL SRCH - Indicates the transceiver is currently on release the PTT switch, and you may partially hear this the second or later pass while searching for a new tone. locality on which to register (see Section 2.9.4). Proceed Tone - This tone consists of two beeps and it NO ACESS - Indicates that the repeater system could tells the landside caller when to enter the five-digit... -
Page 42: Menu Mode Messages
OPERATION 2.13 TEST FUNCTIONS TX DSBL - Indicates that the selected group system is programmed for monitoring only (see Section 2.4.10). With the standard LTR-Net operating code, there TX INHIB - Indicates that the transmitter has been is no test mode that can be selected to perform testing. disabled by the Transmit Inhibit feature (see Section To manually control the transceiver with this code, 2.8.4). -
Page 43: Reading Error Codes
OPERATION stored and can be read using the programmer (see next Transfer > Read * Codes or click the icon in the section). To return to normal operation, cycle power toolbar (see Section 3.7). without the PTT switch pressed or press FCN RCL.* The screen shown in Figure 2-4 is then displayed 2.14.2 READING ERROR CODES which indicates various information about each stored... -
Page 44: Programming
PROGRAMMING SECTION 3 PROGRAMMING Remote Programming Interface (RPI) Programming Cable P.N. 597-7200-031 CAUTION Attach the programming cable with the cable end of the connector up as shown. Attempting to attach it the other way may result in damage to the radio. Figure 3-1 Programming Setup 3.1 GENERAL The programming software requires a Windows... -
Page 45: Rpi Cables
PROGRAMMING injecting the transmit audio signal and monitoring ming software and the same setup used for personality receive audio during alignment (see Section 5). Earlier programming. Refer to Sections 3.12 and 5.2 for more RPI’s, such as Part No. 023-5810-000 or 023-9750- information. -
Page 46: Starting Program
4. Then click OK and follow the on-screen instructions 3.3.2 MENU BAR to install the program.The default directory for the program is C:\Program Files\EFJohnson. If you wish to use some other directory, click Browse and The menu bar (see Figure 3-2) displays the head- select it or type the name to create a new one. -
Page 47: Main Window Panes
PROGRAMMING - Read the programming data from radio (Section groups/banks must be programmed (see Section 3.7). 2.3.12). - Write programming data to a radio (Section 3.7). Saved Info/LTR-Net Locality - Functions like the Flash memory display just described to indicate the - Read error code information stored in radio amount of space remaining in EEPROM U150 for (Section 2.14) -
Page 48: Locality Programming
PROGRAMMING Title Bar - Menu Bar - Toolbar - U150 U208 Memory Memory Left Left Radio Type Status/ Being Programmed Function Status Bar - Figure 3-2 Main Window 1. Select Edit > Radio Type and the displayed screen 3. When all parameters in the Radio Parameters Screens are programmed, click the OK button to selects the Type, Tier, Frequency Band, and Band- width of the programming file (Section 3.6.2). -
Page 49: System Programming
PROGRAMMING and exit, or click the Cancel button to exit without button if deleting a group. To exit without saving the saving any changes. current changes, click only the Done button. 3.4.5 SYSTEM PROGRAMMING 6. Repeat until the system has been programmed with the desired groups. -
Page 50: File Menu
PROGRAMMING 1. Connect the computer to the transceiver as should be used periodically while editing a file to described in Section 3.1.6. prevent the loss of data if a power failure occurs or program execution is interrupted for some other 2. -
Page 51: Edit Radio Type Screen
PROGRAMMING 3.6.2 EDIT RADIO TYPE SCREEN Conventional Enabled - When selected, the proceed tone sounds with conventional calls in The Radio Type screen shown below selects the addition to LTR-Net/LTR standard calls. type, tier, frequency band, and bandwidth parameters of the programming file. -
Page 52: Menu Items Screen
PROGRAMMING Call Delay - Selects the time from 0-7 seconds before condition is selected when power is turned on. Refer to scanning resumes after transmitting a message Section 2.5.2 for more menu mode information, and to (Section 2.6.9). Table 3-1 for brief descriptions of items programmed in the Menu Items screen. -
Page 53: Edit Locality Screen
PROGRAMMING grammed by the user. Numbers of up to 16 digits can described in Section 2.3.12, a locality is a single be entered, and entering a “@” produces a 1-second repeater site, and it is programmed with the repeaters pause (each “@” counts as one of the 16 characters). at that site. -
Page 54: Edit System Screen
PROGRAMMING 3.6.9 EDIT SYSTEM SCREEN The Edit > Systems menu parameter (see Figure 3-3) or equivalent buttons in the toolbar select the screen that sets up and edits systems. As described in Section 2.3.12, a system is programmed with one or more selectable groups and other unique information. -
Page 55: View Menu
PROGRAMMING PROG ERR - Indicates that an error was detected when verifying the data programmed into the transceiver. Read Codes - This menu item or toolbar button reads the error code log stored in the radio and displays it. Refer to Section 2.14 for more information. Read Setup Params - Reads the data contained in a transceiver. -
Page 56: Comports Menu
PROGRAMMING View Personality - Enables or disables the left pane in To disable this feature so that no key is required the main part of the screen which displays the current to read data from the transceiver, do not enter any programming information in a Locality, Bank, or characters in the Pgm Key box, or if there already is a System hierarchy (see Section 3.3.4). -
Page 57: Specifying Ric-Equipped Repeaters
PROGRAMMING between numbers. For example, a five-repeater system microcontroller or a memory device such as an should be numbered 1, 5, 10, 15, and 20. These EPROM. For example, the radio software may be numbers are programmed in the repeater and also each updated to correct software bugs or add feature mobile locality (see Section 3.6.8). -
Page 58: Locality Programming Screen Description
PROGRAMMING Table 3-2 Locality Programming Screen Description This screen is used to create a new locality or edit a current locality. It is displayed by selecting the Edit > Localities menu (see Section 3.6.8) or clicking one of the buttons in the toolbar. In general, a locality is a repeater site. Parameter Description Locality... -
Page 59: System Programming Screen Description
PROGRAMMING Table 3-2 Locality Programming Screen Description (Continued) Parameter Description Display Selects if repeater frequencies are entered as programming Channel numbers or channel Frequencies. With the Mode UHF band, only channel frequencies can be used, so “Channel” is not selectable. Frequency Programs the frequency of each repeater at the locality (Section 3.11.3). -
Page 60: Group Programming Screen Description
PROGRAMMING Table 3-4 Group Programming Screen Description This screen is used to add groups to a system or edit groups already assigned to a system. It is displayed by selecting the Edit > Groups menu or clicking the button in the toolbar (see Section 3.6.10). In the following screens, first select the Group No. - Page 61 PROGRAMMING Table 3-4 Group Programming Screen Description (Continued) Conventional Group Programming Screen Parameter Description Group This drop-down list selects the group to be added or edited in the screen. Number Alpha Tag This specifies the eight-character alpha tag that is displayed when the group is selected. Tx Option Always = Tx enabled, TDOB (Transmit Disable On Busy) disabled Disable Busy = Tx and TDOB enabled, no transmit with carrier even with valid Call Guard On Valid CG = Tx and TDOB enabled, transmit with carrier allowed only with valid Call Guard...
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Page 62: Bank Programming Screen Description
PROGRAMMING Table 3-5 Bank Programming Screen Description This screen is used to create a new bank or edit a current bank. It is displayed by selecting the Edit > Banks menu (see Section 3.6.11) or clicking one of the buttons in the toolbar. In the above screen, select the number of the system to be added or edited in the System Display No. -
Page 63: Call Guard Codes And Tones
PROGRAMMING Table 3-5 Bank Programming Screen Description (Continued) Parameter Description Done Button Click this button when finished editing the bank to save the changes. Cancel Click this button to exit the screen without saving any changes to the bank. Button Default A default bank can be programmed in the Menu Items screen (Section 3.6.5). -
Page 64: Circuit Description
CIRCUIT DESCRIPTION SECTION 4 CIRCUIT DESCRIPTION NOTE: A block diagram of the RF and logic boards is Regulator U601 on the RF board provides the located on page 8-8. C5V supply, and regulator U602 provides the T5V and R5V supply. The T5V supply is enabled when the 4.1 POWER SWITCHING AND REGULATION DPTT (delayed PTT) signal goes low, and the R5V supply is enabled when it goes high. -
Page 65: Vco And Tcxo Modulation
CIRCUIT DESCRIPTION With the receive VCO, Q501 produces the first the A, N, and reference counters to divide by a certain injection signal in the range of 385-425 MHz which is number. This programming is performed by the micro- then amplified by Q502. With the transmit VCO, processor via the serial data bus which consists of the Q531 produces the transmit frequency in the range of Clock, Data, and Latch Enable lines (pins 11-14 of... -
Page 66: Receiver Circuit Description
CIRCUIT DESCRIPTION the C5V input voltage. This converter has a built-in frequency is from the synthesizer, and it is fed through relaxation oscillator and rectifier. The frequency of a low pass filter (C520, C521, L506) which attenuates operation is determined by L201. The built-in rectifier harmonic frequencies present in the injection signal. -
Page 67: Squelch Circuit (U401)
CIRCUIT DESCRIPTION other inputs are unshifted in phase). This network voltage to the first stage (Vbb Control) is from the consists of C410 and ceramic discriminator T401. The power control circuit, and the supply voltage to the last detected audio signal is then amplified and fed out of stages (Vcc) is the unswitched battery supply. -
Page 68: Control Logic And Display
CIRCUIT DESCRIPTION As forward power increases, the output voltage EEPROM U150, digital potentiometer U147, and on pin 7 decreases. U103 then turns off more which LCD driver U501 on the keypad/display board. decreases the supply voltage applied to Vbb Control of U101. - Page 69 CIRCUIT DESCRIPTION Table 4-1 Microprocessor U208 Pin Descriptions (Continued) Pin No. Port Name In/Out Descriptions Active KEYR1 Input Key matrix scan in KEYR2 Input Key matrix scan in KEYR3 Input Key matrix scan in Ground PTT_OUT Input PTT switch CLK_SHIFT Output Clock shift control (H = shift) High...
- Page 70 CIRCUIT DESCRIPTION Table 4-1 Microprocessor U208 Pin Descriptions (Continued) Pin No. Port Name In/Out Descriptions Active External pull-up BEEP Output Audio beep tone P_HOLD Input Flash memory Write Enable RESET Input Reset pulse input External pull-up X-TAL Input System clock connection terminal EX-TAL Input System clock connection terminal...
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Page 71: Receive Audio Processing
CIRCUIT DESCRIPTION Table 4-1 Microprocessor U208 Pin Descriptions (Continued) Pin No. Port Name In/Out Descriptions Active MICMUTE Output Mutes microphone audio signal SQUELCH Input Squelch control Output Transmit/receive data filter bandwidth signal output High RXDATA Input Receive data input TXDATA Output Subaudible tone/main audio signal output SN_RX... -
Page 72: Audio Amplifier (U101, U102)
CIRCUIT DESCRIPTION Also applied at this point are the DTMF and beep approximately 150 Hz. Then when a high-frequency tones. Muting of the DTMF tones is provided by Q201 Call Guard tone is received, Q103A turns off and the which is controlled by the pin 34 output of the micro- cut-off frequency is approximately 190 Hz. -
Page 73: Transmit Audio Processing
CIRCUIT DESCRIPTION U143A is selected. The data output signal on U141C, approximately 300 Hz to attenuate frequencies that pin 4 is then applied to pin 24 of U147 which is the could cause interference with the Call Guard signals. input of the digitally controlled potentiometer 1 in that 4.8.2 LIMITER (U151A) device. - Page 74 CIRCUIT DESCRIPTION transmit data signal on pin 2 is selected is routed to the signal from AC floating at half supply to DC levels of filter, and when it is high the receive data signal on 0 and 5 volts that can be detected by the micropro- pin 1 is routed to the filter.
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Page 75: Alignment Procedure
ALIGNMENT PROCEDURE SECTION 5 ALIGNMENT PROCEDURE Remote Programming Interface (RPI) RPI-Transceiver Cable Part No. 023-9800-000 Part No. 597-7200-031 Audio Generator 680-Ohm Speaker Load PC-Compatible Computer CAUTION Make sure that the programming cable is 50-ohm attached to the radio with the cable up as shown. Load Attempting to attach it the other way may result Signal Generator/... -
Page 76: Loading Operating Code
Starting PCFlash and PCTune conventional channels or use the special test features available with the test code (see Section 5.16). Select Start > Programs > EFJohnson and then click the PCFlash 72xx or PCTune icon as applicable. 5.2 LOADING OPERATING CODE 5.2.2 SAVING PERSONALITY INFORMATION... -
Page 77: Pctune Description
ALIGNMENT PROCEDURE 1. Connect the test setup and make sure that the switch NOTE: The test operating code also provides several on the front of the RPI is set to the Flash program- transceiver test functions that are described in Section ming position (toward the LED so that it indicates 5.16. -
Page 78: Radio Tune Screen
ALIGNMENT PROCEDURE Figure 5-2 PCTune Tune Radio Screen Display Tune Parameters - Displays the following screen which indicates the settings currently programmed into the transceiver. Display Factory Info Screen 5.3.2 RADIO TUNE SCREEN CAUTION Clicking any of the top six buttons on the Radio Tune screen in Figure 5-2 selects that test and immediately keys the transmitter. -
Page 79: Alignment Procedure
ALIGNMENT PROCEDURE ments that are performed are shown on the eight adapter may be required to connect test equipment to buttons on the left side. To perform just one adjust- this jack. An SMA male to BNC female adapter is ment or perform the adjustments individually, click the available by ordering Part No. -
Page 80: Frequency Check/Adjust
ALIGNMENT PROCEDURE 5.7 LOW RF POWER ADJUST connected to the accessory jack. Make sure that the switch on the RPI is away from the LED so that it indicates green. 1. If manually selecting each test, click the “Low Power” button in the screen shown in Figure 5-2. The following sections describe the adjustments Otherwise, this function is selected automatically that are made to align the transceiver. -
Page 81: Receive Bandpass Filter Adjust
ALIGNMENT PROCEDURE 2. Inject a 1 kHz signal at the level indicated on the ceiver must be opened as described in the next screen into the Mic Audio jack of the RPI (see section to access the adjustment point. Section 5.4.1). 5. -
Page 82: Receiver Performance Tests
ALIGNMENT PROCEDURE PERFORMANCE TESTS 5.14 RECEIVER PERFORMANCE TESTS 2. Decrease the signal generator output to obtain a 12 dB reading on the SINAD meter. The signal gener- 5.14.1 PRELIMINARY SETUP ator output should be 0.35 µV maximum. With the standard LTR-Net operating code, the 3. -
Page 83: Transmitter Performance Tests
ALIGNMENT PROCEDURE 5.15 TRANSMITTER PERFORMANCE TESTS 5.15.3 TRANSMIT MODULATION 5.15.1 POWER OUTPUT 1. Select a channel not programmed for Call Guard (CTCSS/DCS) squelch and monitor the transmit Refer to Section 5.14.1 for information on test signal with a communication monitor. Speak into channels. -
Page 84: Test Code Functions
ALIGNMENT PROCEDURE 5.16 TEST CODE FUNCTIONS most six characters of the display (the right digit indi- cates the group number as described in the next 5.16.1 GENERAL section). The last selected channel is saved at power down. The test channels are listed in Table 5-1. When the special test operating code has been 5.16.3 MODULATION MODES loaded as described in Section 5.2.3, various test chan-... -
Page 85: Parameter Edit Modes
ALIGNMENT PROCEDURE 5.16.5 PARAMETER EDIT MODES Selecting Parameters General The parameters that can be selected and the key sequence used to select each are as follows: Some levels set during alignment can be manu- ally controlled by selecting the Parameter Edit mode. FCN 5 (Receive RF Bandpass Filter) - Changing This mode is selected and controlled by the following the number changes the center frequency. -
Page 86: Ltr-Net Overview
LTR-NET OVERVIEW SECTION 6 LTR-NET OVERVIEW Locality 1 Locality 2 Locality 3 Viking® VX Repeaters Viking® VX Repeaters Viking® VX Repeaters Data Data Data Subscriber Subscriber Subscriber Units Units Units Voice and Voice and System and Subscriber Data Link Data Link Manager Voice and 3000-Series... -
Page 87: Ltr-Net Features
LTR-NET OVERVIEW • Current LTR subscriber units can remain in service System Control and LTR-Net subscriber units added gradually. This • makes upgrading to LTR-Net very convenient and When new channels are added to a locality, less costly. subscriber units can be updated with those channels over the air. -
Page 88: Definitions
Refer to Sections can access. 6.2.3 and 2.3.12 for more information. LTR Signaling - This popular EFJohnson radio 6.2 SYSTEM ARCHITECTURE trunking system provides the basis for the LTR-Net system. For a complete description of LTR trunking, 6.2.1 INTRODUCTION... -
Page 89: Repeaters
LTR-NET OVERVIEW LTR-Net Subscriber Units A “locality” refers to repeaters at the same loca- tion that are interconnected by a common high-speed These subscriber units are designed for operation data bus. Up to 20 repeaters can be interconnected, so in an LTR-Net radio system and therefore have all a locality can include up to 20 repeaters. -
Page 90: Call Processor
LTR-NET OVERVIEW 6.2.5 CALL PROCESSOR information can then be exported and used by billing software to generate customer billing. The Call Processor is a Windows NT-based 6.3 STANDARD GROUP CALLS personal computer running switch management soft- ware. The Call Processor serves as an interface between the switch and the System and Subscriber Standard group calls are between subscriber units Manager (see next section). -
Page 91: Special Calls
LTR-NET OVERVIEW • 6.5.3 TELEPHONE CALLS The call is routed to a specified locality only if a call on the home/group has been recently detected. This results in more efficient use of system resources. Telephone calls allow calls to be placed over the public switched telephone network. -
Page 92: Home Repeaters
LTR-NET OVERVIEW voice on any repeater because the data occupies the repeater, it continues to monitor that repeater. If a subaudible frequencies below the voice band. message is detected that has its home repeater as the “channel-in-use” or “free” repeater, the subscriber unit 6.6.2 HOME REPEATERS then returns to monitoring its home repeater. -
Page 93: Electronic Serial Number (Esn)
LTR-NET OVERVIEW Uses of unique ID codes include registering and edge message, and this will be indicated on the system de-registering on a locality, unit identification, airtime manager’s screen. billing, and unique ID calls (see “Unique ID Calls” in 6.7.5 KILL AND SLEEP Section 6.5.2). -
Page 94: New Channel Updates
LTR-NET OVERVIEW When a new locality is located, the subscriber system from wasting resources trying to reach out-of- unit registers on the locality by sending messages indi- service units. Power is automatically held on until this cating its unique ID code and the home channel it will message is sent. -
Page 95: Parts List
PARTS LIST SECTION 7 PARTS LIST KEYPAD/DISPLAY BOARD ASSEMBLY Ref No Description Part No. Ref No Description Part No. COMPLETE ASSEMBLIES C205 ECS-T1CX106 capacitor 022-3909-109 C206 ECS-T1CY105 capacitor 022-3909-108 A001* Keypad/display board 51300081 022-3909-002 C207 ECS-T1CY105 capacitor 022-3909-108 A002* Logic board 51300035 022-3909-016 C501 GRM39X7R182K50PT capacitor 022-3909-233... -
Page 96: Rf Board Assembly
PARTS LIST KEYPAD/DISPLAY BOARD ASSEMBLY RF BOARD ASSEMBLY Ref No Description Part No. Ref No Description Part No. Q402 DTA123EUA switching SC-70 022-3909-226 R414 CR 1/16W 104JV resistor 022-3909-007 Q403 DTA123EUA switching SC-70 022-3909-226 R415 CR 1/16W 104JV resistor 022-3909-007 Q404 UMT3904 switching SC-70 022-3909-170... - Page 97 PARTS LIST RF BOARD ASSEMBLY (CONT’D) Ref No Description Part No. Ref No Description Part No. C136 ECS-T1CY475 capacitor 022-3909-111 C322 GRM39COG050C50PT capacitor 022-3909-065 C137 GRM39X7R103K50PT capacitor 022-3909-073 C323 GRM39COG050C50PT capacitor 022-3909-065 C138 GRM39COG471J50PT capacitor 022-3909-096 C324 GRM39COG090D50PT capacitor 022-3909-069 C140 GRM39X7R102K50PT capacitor 022-3909-072 C325...
- Page 98 PARTS LIST RF BOARD ASSEMBLY (CONT’D) Ref No Description Part No. Ref No Description Part No. C506 GRM39COG220J50PT capacitor 022-3909-083 C613 GRM39X7R103K50PT capacitor 022-3909-073 C507 GRM39COG070D50PT capacitor 022-3909-067 C614 GRM39X7R103K50PT capacitor 022-3909-073 C508 GRM39COG471J50PT capacitor 022-3909-096 C615 ECS-T1CY475 capacitor 022-3909-111 C510 GRM39COG471J50PT capacitor 022-3909-096...
- Page 99 PARTS LIST RF BOARD ASSEMBLY (CONT’D) Ref No Description Part No. Ref No Description Part No. L503 0805CIH21T33NJ chip coil 022-3909-211 R115 CR 1/16W 333JV resistor 022-3909-031 L504 0805CIH21T15NJ chip coil 022-3909-207 R116 CR 1/16W 333JV resistor 022-3909-031 L505 0805CIH21T27NJ chip coil 022-3909-210 R117 CR 1/16W 124JV resistor...
- Page 100 PARTS LIST RF BOARD ASSEMBLY (CONT’D) Ref No Description Part No. Ref No Description Part No. R411 CR 1/16W 154JV resistor 022-3909-015 R552 CR 1/16W 820JV resistor 022-3909-055 R412 CR 1/16W 472JV resistor 022-3909-041 R413 CR 1/16W 153JV resistor 022-3909-014 RT401 NTCC16Y 103 J370H thermistor 022-3909-232 R414...
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Page 101: Logic Board Assembly
PARTS LIST LOGIC BOARD ASSEMBLY Ref No Description Part No. Ref No Description Part No. C165 GRM39X7R272K50PT capacitor 022-3909-235 LOGIC BOARD ASSEMBLY C166 GRM39X7R681K50PT capacitor 022-3909-104 C167 GRM39X7R333K50PT capacitor 022-3909-236 C168 GRM39X7R392K50PT capacitor 022-3909-093 C047 GRM39X7R103K50PT capacitor 022-3909-073 C170 GRM39COG680J50PT capacitor 022-3909-237 C101 GRM39X7R103K50PT capacitor 022-3909-073... - Page 102 PARTS LIST LOGIC BOARD ASSEMBLY (CONT’D) Ref No Description Part No. Ref No Description Part No. C241 GRM39X7R103K50PT capacitor 022-3909-073 C242 GRM39Y5V104Z25PT capacitor 022-3909-074 FLSH-110-01-F-DH connector 022-3909-122 C243 GRM39COG270J50PT capacitor 022-3909-088 AXN430430P connector 022-3909-123 C244 GRM39COG270J50PT capacitor 022-3909-088 AXN420330S connector C245 GRM39COG030C50PT capacitor 022-3909-063 C246...
- Page 103 PARTS LIST LOGIC BOARD ASSEMBLY (CONT’D) Ref No Description Part No. Ref No Description Part No. R112 CR 1/16W 394JV resistor 022-3909-038 R171 CR 1/16W 333JV resistor 022-3909-031 R113 CR 1/16W 124JV resistor 022-3909-011 R172 CR 1/16W 105JV resistor 022-3909-008 R114 CR 1/16W 273JV resistor 022-3909-026...
- Page 104 PARTS LIST LOGIC BOARD ASSEMBLY (CONT’D) Ref No Description Part No. Ref No Description Part No. R233 CR 1/16W 104JV resistor 022-3909-007 U103 LM2904 rx DC restoration, SO-8 022-3909-243 R234 CR 1/16W 472JV resistor 022-3909-041 U141 C4053DT analog s/w, SOP-16 022-3909-186 R235 CR 1/16W 471JV resistor...
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Page 105: Mechanical Parts
PARTS LIST MECHANICAL PARTS Item No. From Desig. / Assembly Description Part No. Pg 6-12 Locator A004* Complete assy’s 20101361 Plastic front cover assembly 022-3909-025 (includes items 1-14) MK7* Front Panel 216000074 (3K-3146) window, LCD 022-3909-142 MK8* Front Panel 23300432 (4K-2855) nut, volume 022-3909-160 MK10* Front Panel... - Page 106 PARTS LIST EXPLODED VIEW November 2001 7-12 Part No. 001-7240-001...
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Page 107: Schematic Diagrams And Component Layouts
SECTION 8 SCHEMATIC DIAGRAMS AND COMPONENT LAYOUTS RF BOARD AUDIO/LOGIC BOARD KEYPAD/DISPLAY BOARD FLEX CIRCUIT J101 J801 Battery In Battery Out Sw Battery In Sw Battery Out Modulation In Modulation Out Internal Speaker Battery In Battery Out Display Strobe Out Display Strobe In J902 S901... -
Page 108: Rf Board Schematic
C404 C412 1000pF T401 SECOND MIXER/ R306 R315 DETECTOR R313 C420 C421 C410 R404 C418 1000pF RECEIVER FIRST MIXER R402 C404 R403 82pF 0.01 1.5k Part of C316 R305 IF AMP C340 R401 1.5k 100k C406 C317 J101 1000pF 3.3k R304 L303 180k... -
Page 109: Rf Board Top View
Antenna Jack RF BOARD BOTTOM VIEW RF BOARD TOP VIEW November 2001 Part No. 001-7240-001... -
Page 110: Logic Board Schematic
MICROCONTROLLER P41/AN1 U208 PG3/_CS1 H8S-2357 PG0/_CAS Vcc1 PF3/_LWR Vcc33 C241 C242 PF6/_AS Vcc52 0.01 Rx AUDIO GATE P62/_DREQ1 Vcc76 R102 Q101 U202 PE2/D2 Vcc81 RECEIVE AUDIO PROCESSING R101 UMT3904 TC4S66 P60/_DREQ0/_CS4 R231 P66/_CS6/_IR02 C206 100k NPSPAC C103 PD7/D15 _STBY 820pF Rx Audio 300-3000 Hz R263... -
Page 111: Logic Board Top View
J106 10-5-00 10-5-00 LOGIC BOARD TOP VIEW LOGIC BOARD BOTTOM VIEW November 2001 Part No. 001-7240-001... -
Page 112: Display/Keypad Board Schematic
KEYPAD Sw Batt J801 D401 Sw Batt Out EXTERNAL SPEAKER DISST R411 U102 "7" "4" "1" 100k AUDIO AMP Serial Clock NJM2073 Source C115 DISEN D402 INTA + External Speaker INTA - Out A C110 BKLED R111 C111 100pF INTB + Out B KEYR0 R412... -
Page 113: Display
D902 D901 10-5-00 J802 D303 D304 Top Panel Option Sw D306 D305 Upper Opt S902 To Accessory Connector To Speaker S901 PTT Sw D307 D308 Lower Opt S903 D310 D309 J801 To J802 (Keypad/Display Bd) DISPLAY/KEYPAD BOARD BOTTOM VIEW DISPLAY/KEYPAD BOARD TOP VIEW FLEX CIRCUIT LAYOUT November 2001 Part No. -
Page 114: Transceiver Block Diagram
KEYPAD/DISPLAY AUDIO/LOGIC BOARD RECEIVE AUDIO PROCESSING 300-3000 Hz Audio BOARD Volume Control Bandpass Filter Expander Gate U202 VR901B Speaker Audio U101A, U204B U101B MICROCOMPUTER DTMF Encoder U208 DTMF Tones U201 Audio Internal RF BOARD U101 Speaker 16k x 8 Display RECEIVER RECEIVE DATA PROCESSING EEPROM... - Page 115 Part Number 001-7240-001NR 11-01hph Printed in U.S.A.