Operator’s Manual C-5000 COMMUNICATION MANAGEMENT CONTROLLER Part Number 31300-1X02-1XX0 Manual Number 150-041102 Revision A September 18, 2001
C-5000 Operator’s Manual TABLE OF CONTENTS INTRODUCTION .......................................................................................................................................................4 FEATURES...................................................................................................................................................................4 TRANSCEIVER OVERVIEW ............................................................................................................
C-5000 Operator’s Manual SETTING PASSWORDS ...............................................................................................................................................38 SETTING MISCELLANEOUS CONFIGURATION OPTIONS .............................................................................................39 CONFIGURING THE C-5000 USING A PC ...................................................................................................................
C-5000 Operator’s Manual Introduction The Wulfsberg C-5000 Communication Management Controller (CMC) is a microprocessor-based control head device that controls one or two Wulfsberg transceivers. The C-5000 supports the full line of Wulfsberg FLITECOMM, FLEXCOMM I, and FLEXCOMM II transceivers. This manual is intended to quickly instruct the user on the basic operations of the C-5000 and also outline the advanced operations that set the C-5000 apart from any other communication device.
C-5000 Operator’s Manual Steps to Successful Setup and Operation While we would like to pull products out of the box and immediately start to use them, this system is one that takes a little work to get to that point. The following checklist will help installers and initial users setup the C-5000 and RT-5000. 1. Connect C-5000 to the transceivers. Note part numbers of the Control head and all transceivers.
C-5000 Operator’s Manual Basic Operation Front Panel & Controls DISPLAY - The C-5000 has a 2 line display, with 20 characters on each line. It provides the visual feedback for the system. Exactly what is displayed depends on the current operating mode of the C-5000. During normal operation, the top line shows information for transceiver #1 and the bottom line shows information for transceiver #2. UPPER SOFT key – This key’s use depends on the current operating mode of the C-5000.
C-5000 Operator’s Manual KEYPAD – The C-5000 has a 12 button keypad. Each button’s primary functions are described below. 1:DIR Toggles the transceiver under cursor control in and out of DIRECT mode. Use this button to enter a “1” during keypad entry mode. 2:MODE This button will cycle through the enhanced modes of operation. Use this button to enter a “2” during keypad entry mode. 3:EDIT This button will display the EDIT PAGE for the transceiver under cursor control.
C-5000 Operator’s Manual The Home Page The HOME PAGE is the primary operational page of the C-5000. The HOME PAGE becomes visible when the C5000 is ready for user input, immediately after the power up and initialization sequences have completed. The C5000 can control two radios. When viewing the HOME PAGE, Radio 1 is always displayed on the top line. Radio 2 is always displayed on the bottom line. Virtually all keypad-initiated operations are performed on the radio under cursor control.
C-5000 Operator’s Manual Turning the System On and Off To power the C-5000 ON, press and hold the ON button for approximately one second. Several version number and copyright pages appear on the display while the unit performs a selFtest and initializes the attached radio systems. When initialization is complete, the HOME PAGE will appear on the display. To power the C-5000 OFF, press and hold the ON button for several seconds.
C-5000 Operator’s Manual • Rotate the OUTER VOLUME knob clockwise to increase the volume level, or counterclockwise to decrease the volume level. Selecting a Preset Channel Using the Cursor/Value Knob When the C-5000 first powers on, the selected channels will be reset to those that were active when the unit was powered down. To select a different preset channel, do one of the following: • Move the cursor under the least significant digit of the channel number you want to change.
C-5000 Operator’s Manual • Press the ENTER button. The input channel number will be selected, assuming it was a valid channel. If you input an invalid channel number, the display will reappear as depicted above, giving you the opportunity to input a valid channel number. You can press the HOME button to cancel the input operation and return to the HOME PAGE. Selecting a Channel by Alphanumeric Identifier It is sometimes desirable to select a preset channel by name as opposed to number.
C-5000 Operator’s Manual pressing the DIR button. This will temporarily copy the receive frequency into the transmit frequency. The direct mode indicator will light. The following illustration shows radio 1 in direct mode. Direct Mode Indicator 1 123 2 φ ..1 → LUKEAFB TWR1 TACTICAL-001 Pressing the DIR button on a direct channel has no effect. NOTE: Receiving/Transmitting Receiving The C-5000 is constantly monitoring its radios for reception.
C-5000 Operator’s Manual Enabling/Disabling Transceivers Disabling (Turning Off) a Transceiver • • Place the cursor under the R/T status indicator. The following illustration shows the cursor under Radio #1’s status indicator. 1 123 2 φ ..1 → LUKEAFB TWR1 TACTICAL-001 Rotate the VALUE knob once in either direction. The display will indicate the radio has been turned off, as the following illustrates. . 2 RADIO OFF φ ..
C-5000 Operator’s Manual Using The Edit Page The EDIT PAGE allows the operator to temporarily change properties of a preset channel, and permanently change properties of a manual channel. Precisely which properties can be changed varies with channel and radio type. For example, transmit power can only be changed on RT-5000 radios, because the other radios do not have variable power capability. The following illustration is an example of what the EDIT PAGE looks like.
C-5000 Operator’s Manual • Move the cursor under the field containing the channel property you want to edit. • Use the VALUE knob to change the property to the desired value. • Press the HOME button to return to the HOME PAGE. The changes will remain in effect until the channel is changed. NOTE: The cursor cannot be moved under channel property fields that are not editable. Editing a Manual Channel To change the properties of a manual channel, do the following.
C-5000 Operator’s Manual ..1 S H 506.987R 509.987T T... T.17 FM .. • Press the ENTER button to move the cursor under the “T” of the transmit tone field. • Rotate the VALUE knob clockwise once. The transmit tone field will show “…” as depicted below. ..1 S H 506.987R 509.987T T... T... FM .. Selecting a CTCSS Tone • Move the cursor under the least significant digit of the tone field you want to change. The illustration below assumes we want to change the receive tone. ..1 S H • 506.987R 509.
C-5000 Operator’s Manual • Move the cursor under the least significant digit of the tone, as illustrated below. ..1 S H • 506.987R 509.987T T023 T.17 FM .. Rotate the VALUE knob clockwise to increment the tone, or counterclockwise to decrement the tone. Keep rotating the VALUE knob until the desired tone is displayed. A “0-7” in the first position means you are selecting a DCS tone. This is a special kind of tone rarely used.
C-5000 Operator’s Manual Changing Receiver Bandwidth The receiver bandwidth can only be changed on the manual channel. To change the manual channel’s receiver bandwidth, do the following. • Move the cursor under the bandwidth field, as depicted below. ..1 S H • 506.987R 509.987T T.17 T.17 FM .. Rotate the VALUE knob in either direction. Each turn of the VALUE knob will select the next bandwidth option in the list. Turn the VALUE knob until the desired bandwidth symbol is displayed.
C-5000 Operator’s Manual Enhanced System Features Phone Patch Mode The C-5000 can patch into the phone system using both DTMF and pulse dialing. This requires equipment on the ground, such as a transceiver and an interface box, to connect the base station radio to the telephone lines. This is NOT a cellular phone. • From the HOME PAGE, select the radio and channel. Press the MENU button. The following display page will appear.
C-5000 Operator’s Manual • Ensure you are on the HOME PAGE. • Select the desired channel for radio 1. • Select the desired channel for radio 2. • Press the MODE button until the following display page appears. PRESS ENTER BUTTON FOR SIMULCAST MODE • Press the ENTER button. The following illustrates the SIMULCAST PAGE for radio 1 on channel 1 and radio 2 on channel 2. 1 SIMULCAST MODE ..1 2 ..2 • Press the HOME button to exit simulcast mode and return to the HOME PAGE.
C-5000 Operator’s Manual PRESS ENTER BUTTON FOR RELAY MODE • Press the ENTER button. The following illustrates the RELAY PAGE for radio 1 on channel 1 and radio 2 on channel 2. RELAY MODE ..1 2 ..2 1 • Press the HOME button to exit relay mode and return to the HOME PAGE. Relay/Simulcast Operation Relay-Simulcast mode combines the functions of Relay Mode and Simulcast Mode.
C-5000 Operator’s Manual Repeater Operation Repeater mode allows the C-5000-based system to act as an airborne repeater, providing a radio link between two ground locations that transmit and receive in the same frequency band. You can establish repeater operation as follows. • Ensure you are on the HOME PAGE. • Select the desired channel for radio 1. • Press the MODE button until the following display page appears. PRESS ENTER BUTTON FOR REPEATER MODE • Press the ENTER button.
C-5000 Operator’s Manual Encryption Features Turning Encryption On and Off Put the cursor on the top or bottom line depending on which radio is to be selected. Press the PVT button to toggle encryption on and off. If the C-5000 has been configured to control an RT-5000 with an encryption module and the preset channel being used has been set up for encryption, the privacy indicator will light. Encryption can only be turned on for channels that have been pre-programmed with an encryption key.
C-5000 Operator’s Manual Performing an OTAR • Ensure you are on the HOME PAGE, and the cursor is on the line of the radio you wish to select and an OTAR capable channel is also selected. • Press the OTAR button. The following illustrates the display when the OTAR button was pressed with radio 1 under cursor control. 1 2 • ENTER=START OTAR φ ..1 TACTICAL-001 Press the ENTER button to initiate the OTAR process. The status of the OTAR will be displayed on the radio’s display line.
C-5000 Operator’s Manual Erasing Encryption Keys It may be desirable to erase the encryption keys contained in a RT-5000 transceiver. For example, prior to sending the unit in for service. This can be accomplished as follows. • Ensure you are on the HOME PAGE, and the cursor is on an encryption capable channel. • Press the PROG button. You will be prompted to enter a password, as follows. ENTER PASSWORD 2 #=.... • Input the appropriate password using the keypad and press the ENTER button.
C-5000 Operator’s Manual Manually Loading Encryption Keys It may be desirable to manually load the encryption keys contained in a RT-5000 digital transceiver. This can be accomplished as follows. • Ensure you are on the HOME PAGE, and the cursor is on an encryption capable channel. • Press the PROG button. You will be prompted to enter a password, as follows. ENTER PASSWORD 2 #=.... • Input the appropriate password using the keypad and press the ENTER button.
C-5000 Operator’s Manual Programming Preset Channels WARNING: CONFIGURING THE C-5000 MUST BE PERFORMED BEFORE PRESET CHANNELS ARE PROGRAMMED FOR THE UNIT TO OPERATE PROPERLY !!!! Programming Preset Channels Using the Front Panel Although Wulfsberg highly recommends using the PC based Remote Programmer software to program preset channels for the C-5000, they can be programmed from the front panel. The process is as follows. • Ensure you are on the HOME PAGE. • Press the PROG button.
C-5000 Operator’s Manual PROG: 2=NEXT ADD-..1 • 3=BACK Use the cursor/value knobs to select the number for the new channel. Only available channel numbers will be displayed. Press the MODE button to go to the next menu page. PROG: 2=NEXT R/T SYS # = 1 3=BACK • Use the cursor/value knobs to select the radio this channel is being programmed for. Press the MODE button to go to the next menu page. • If both radios are RT-5000’s with the same part number, both radios will be able to use any channel.
C-5000 Operator’s Manual • IF THE CHANNEL IS TO BE PROGRAMMED FOR THE INTERNAL TRANSCEIVER MODULE IN THE RT-5000, THE ZONE AND CHANNEL MUST MATCH THE ZONE, CHANNEL, AND FREQUENCY INFORMATION PROGRAMMED INTO THE ITM. PROG: 2=NEXT 3=BACK RX FREQ=000.000 • Use the cursor/value knobs or the keypad to input the channel’s receive frequency. Press the MODE button to go to the next menu page. PROG: 2=NEXT RX TONE=... • 3=BACK Use the cursor/value knobs to input the channel’s receive tone.
C-5000 Operator’s Manual PROG: 2=NEXT 3=BACK ENCRYPTION TYPE=CLR • Use the cursor/value knobs to input the channel’s encryption type. This option can be CLR (no encryption), EXT (external encryption), STD (internal encryption on internal transceiver module), or OTAR (internal encryption with OTAR capability on internal transceiver module). Press the MODE button to go to the next menu page. PROG: 2=NEXT ENCRYPTION • KEY= .. Use the cursor/value knobs to input the channel’s encryption key.
C-5000 Operator’s Manual PROG: 2=NEXT 3=BACK 3RD IF INJECTION= HI • Use the cursor/value knobs to input the channel’s third I.F. Injection as HI or LO. The default is LO. Press the MODE button to go to the next menu page. PROG: 2=NEXT 3=BACK RX AUDIO PHASE= 0 • Use the cursor/value knobs to input the channel’s receive audio phase as 0 or 180. The default is 0. Press the MODE button to go to the next menu page.
C-5000 Operator’s Manual Configuring the C-5000 Configuring the C-5000 Although Wulfsberg highly recommends using the PC based Remote Programmer software to specify the C-5000’s configuration, it can be specified from the front panel. The process is as follows. • Ensure you are on the HOME PAGE. • Press the PROG button. You will be prompted to enter a password, as follows. ENTER PASSWORD 2 #=.... • Input the appropriate password using the keypad and press the ENTER button.
C-5000 Operator’s Manual SETUP: 2=NEXT 3=BACK ENTER=SETUP RADIO #1 • You can press the ENTER button to configure radio 1. Refer to the sections on configuring RT-5000 and nonRT-5000 radios for details on these sub-menu pages. Press the MODE button to display the next menu page. SETUP: 2=NEXT 3=BACK ENTER=SETUP RADIO #2 • You can press the ENTER button to configure radio 2. Refer to the sections on configuring RT-5000 and nonRT-5000 radios for details on these sub-menu pages.
C-5000 Operator’s Manual SYSTEM SETUP MODE HOME=EXIT 2=REVIEW • Press the HOME button to exit system configuration, or the MODE button to review current settings. Configuring the C-5000 to Control an RT-5000 This section drills down into the radio setup sub-menu pages. Refer to the section on configuring the C-5000 for details on how to reach these menu pages. This section assumes the C-5000 part number you entered indicated an RT-5000 was present for Radio #1. We pick up at the following display page.
C-5000 Operator’s Manual ←I N C ←D E C • 2=NEXT 3=BACK SQUELCH LVL=160 This page allows you to set the RT-5000’s squelch level. Press the UPPER SOFT KEY to increase the squelch level, or the LOWER SOFT KEY to decrease squelch level. The squelch level determines the signal strength required by the RT-5000 to open its audio gates, allowing you to hear what it is receiving. The larger the number, the stronger the required signal. Press the MODE button to display the next menu page.
C-5000 Operator’s Manual SYS #2:2=NEXT 3=BACK RT-138 PRESENT-YES • Use the cursor/value knobs to tell the C-5000 if an RT-138 is present. Press the MODE button to display the next menu page. SYS #2:2=NEXT 3=BACK RT-138F PRESENT-NO • Use the cursor/value knobs to tell the C-5000 if an RT-138F is present. Press the MODE button to display the next menu page. SYS #2:2=NEXT 3=BACK RT-450 PRESENT-NO • Use the cursor/value knobs to tell the C-5000 if an RT-450 is present.
C-5000 Operator’s Manual SYS #2:2=NEXT 3=BACK RT-7200 PRESENT-NO • Use the cursor/value knobs to tell the C-5000 if an RT-7200 is present. Press the MODE button to display the next menu page. SYS #2:2=NEXT 3=BACK GUARD #1 PRESENT-YES • Use the cursor/value knobs to tell the C-5000 if a Guard is present. Press the MODE button to display the next menu page. SYS #2:2=NEXT 3=BACK ENTER=SETUP GUARD #1 • This page only appears if a guard is present.
C-5000 Operator’s Manual SYS #2:2=NEXT 3=BACK TONE BOARD CTCSS-NO • Use the cursor/value knobs to tell the C-5000 if a CTCSS tone board is present. Press the MODE button to display the next menu page. SYS #2:2=NEXT 3=BACK TONE BOARD DCS-NO • Use the cursor/value knobs to tell the C-5000 if a DCS tone board is present. Press the MODE button to display the next menu page.
C-5000 Operator’s Manual VERIFY INPUT ←B A C K #=.... • Use the keypad to re-input the new password, and press the ENTER button. This second entry is for verification. If you entered an inconsistent password, your input will be erased, and you may try again. Once you have entered the same password on both pages, it will be changed, and the display will revert to the following.
C-5000 Operator’s Manual SETUP: 2=NEXT 3=BACK C-5000 DEEMPH -NO • This page only appears if system encryption is available. Use the cursor/value knobs to tell the C-5000 if it should use de-emphasis. Press the MODE button to display the next menu page. MISC HOME=EXIT • SETUP 2=REVIEW Press the HOME button to exit the miscellaneous configuration menu pages, or the MODE button to review current settings.
C-5000 Operator’s Manual Uploading a Configuration from the C-5000 into RP The C-5000’s current configuration can be uploaded into the RP software as follows. • From the HOME page, press the PROG button, and enter the appropriate password. • Press the MODE button until the following display page appears. PROG: 2=NEXT 3=BACK = RP LOAD • Press the ENTER button to display the following page.
C-5000 Operator’s Manual RSS SOFTWARE DESCRIPTION AND PROGRAMMING Before You Begin To program the ITM inside the RT-5000 the user must use a DOS based PC (the slower the better!) and Motorola’s RSS software. Users must obtain their own copies of the Software as Wulfsberg cannot supply it. The programming of the ITM requires three basic steps. First, enter the information that has to do with the setup of the way the RT-5000 communicates with the ITM.
C-5000 Operator’s Manual Some areas that will NOT be used: F2 SERVICE – This is used by service personnel align the receiver and transmitter of the ITM. F8 FLASH UPGRADE – this is used by technicians to perform updates to the radio feature set. GET/SAVE/PROGRAM MENU – Displayed by pressing F3 at the MAIN MENU. The following actions are performed here: F2 READ DATA – This is how you will draw the Archive information out of an existing ITM’s codeplug inside an RT-5000.
C-5000 Operator’s Manual To perform a CLONE, have an Archive loaded into resident memory. Set up the C-5000 per instructions located elsewhere in this document to make it ready to communicate with the RSS program. Connect the PC to the RT System programming port (a DB-9 connector located somewhere in the aircraft.) Go to this screen and press F3 to enter the target ITM’s MDC UID and ASTRO ID (Only for applicable systems See Below). Then, back on this screen, press F2 to read the target ITM’s serial number.
C-5000 Operator’s Manual RADIO WIDE CONFIGURATION MENU – Displayed by pressing F4 ! F3 from the Main Menu. This is the next level of submenu that leads to items that will affect the overall operation of the radio. Currently the PHONE LISTS and OPTIONS (F4) section and the SCAN LIST and OPTIONS (F5) features are not enabled in the RT5000. The remaining selections will be detailed in the following sections. RADIO WIDE OPTIONS – Displayed by pressing F4 ! F3 ! F2 from the Main Menu.
C-5000 Operator’s Manual Key ID Transmit Hang Time – 0 CKR Key Management – ENABLED Migrate from Securenet – ENABLED Keyset User Selectable – ENABLED Erase Previous Keyset On User Change – DISABLED OTAR SIGNALLING OPTIONS – Displayed by pressing F4 ! F3 ! F2 ! F6 ! F7 from the Main Menu. This page controls whether the radio is OTAR capable or not in both the MDC (Analog) or ASTRO (Digital) modes MDC OTAR OPTIONS – Displayed by pressing F4 ! F3 ! F2 ! F6 ! F7 ! F4 from the Main Menu.
C-5000 Operator’s Manual RADIO WIDE SWITCH CONFIGURATION – Displayed by pressing F4 ! F3 ! F3 ! F3 from the Main Menu.
C-5000 Operator’s Manual Slow Scroll Delay – 1000 Fast Scroll Delay – 250 Slow Scroll Count – 3 Auto Light - DISABLED Emergency Receive - DISABLED Display SYS/SUB - DISABLED Talkgroup Display on Mode Change – DISABLED Display on Receive – DISABLED Display on PTT – DISABLED Radio Lock - DISABLED CONVENTIONAL MENU – Displayed by pressing F4 ! F6 from the Main Menu. This is the primary submenu leading to all aspects of programming for Conventional type channels, whether they are Analog or Digital (ASTRO).
C-5000 Operator’s Manual Signalling – This controls whether the channel can function as a secure channel. Set this to MDC for all channels that will need voice privacy. Set to NONE for non-secure channels. MDC System# - Controls what MDC system the radio is operating in . PTT ID – This setting controls whether or not the UID is transmitted each time the radio is keyed. RX Voice/Signal Type – This controls whether the channel is capable of operating on Analog, Digital, or both.
C-5000 Operator’s Manual PERSONALITY MDC OTIONS – Displayed by pressing F4 ! F6 ! F3! F7 from the Main Menu. This menu controls Selective Calling and Paging features of the radio, along with control of the transmit function when other signals are present on the frequency.
C-5000 Operator’s Manual Voice Key Strapping – This allows the user to select among the several encryption keys available after an OTAR process to use for transmitting. It should be set to SELECT. Voice Key Selection – This setting defines the Default or Preset encryption key for this particular personality. For most USCS personalities, this would be set to “1”. It may be set to “2” for INTEROP type personalities or some special key for special use channels.
C-5000 Operator’s Manual Call Alert Decode – DISABLED Call Alert Encode – DISABLED Selective Call Decode – DISABLED Selective Call Encode – DISABLED Emergency Revert – Selected Channel RX Network ID = xxxxxx TX Network ID = xxxxxx Direct Network ID = xxxxxx Late Entry Fast Unmute – DISABLED Talkgroup – DISABLED MDC CONFIGURATION MENU – Displayed by pressing F4 ! F6 ! F4 from the Main Menu. This page depicts a submenu leading to configuration screens for the MDC operations of the radio.
C-5000 Operator’s Manual ASTRO RADIO WIDE – Displayed by pressing F4 ! F6 ! F5 ! F2 from the Main Menu.
C-5000 Operator’s Manual CONVENTIONAL MESSAGE ALIAS LIST – Displayed by pressing F4 ! F6 ! F8 from the Main Menu. This is used to configure various short messages to send via the radio. It is not supported in the Flexcomm integration. Any entry showing on this screen is the factory default and may remain. CONVENTIONAL STATUS ALIAS LIST - Displayed by pressing F4 ! F6 ! F9 from the Main Menu. This is used to configure various short status messages to send via the radio.
C-5000 Operator’s Manual FILE MAINTENANCE MENU – Displayed by pressing F6 from the Main Menu. This menu is a VERY CRUDE file maintenance menu for creating new directories on the PC Hard Disk or for Deleting Archive files. It would be MUCH better to ignore this capability and perform all file maintenance tasks inside of Windows using Explorer. Functions available include: F2 – Create a new directory.
C-5000 Operator’s Manual Glossary AM – Acronym for “Amplitude Modulation”. In this type of modulation, the amplitude of the signal is varied in proportion to the voice or data input signal. The signal quality can be severely degraded because of lightning or man made electrical noise. AM is only used in the frequency ranges 108 to 152 MHz and 225 to 400 MHz. All air traffic control functions use AM modulation. Audio Phase – The RT-5000 can invert the phase of the audio signal during transmit or receive.
C-5000 Operator’s Manual Guard Receiver – Second receiver added to the transceiver to monitor a specific frequency. Some common “guard” frequencies are 121.5, 243, Marine channel 16, and Marine channel 70. However, this optional function can also be used to monitor a dispatch channel, or an important tactical frequency. Some Guard receivers have a single frequency that is set in hardware.
C-5000 Operator’s Manual RP - Acronym for “Remote Programmer”. Wulfsberg’s software to program the C-5000 with channel information via a connector of the front of the C-5000 is called the RP Software. It is recommended that this method is used whenever possible to program the C-5000 memory. While front panel programming is available for emergencies, using the RP software is less prone to operator errors and automatically provides for memory backup in case on control head failure.
C-5000 Operator’s Manual Appendix A – CTCSS (PL) Tone Codes C-5000 TONE CODE TONE FREQ (HZ) EIA TONE CODE C-5000 TONE CODE TONE FREQ (HZ) EIA TONE CODE 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 67.0 71.9 74.4 77.0 79.7 82.5 85.4 88.5 N/A N/A 91.5 94.8 97.4 100.0 103.5 107.2 110.9 114.8 N/A N/A 118.8 123.0 127.3 131.8 136.5 141.3 146.2 151.4 N/A N/A 156.
C-5000 Operator’s Manual Appendix B – Mode 2 Operation Overview The C-5000 has the capability to control the RT-5000 in such a way that the user can monitor both the main and the Guard (ITM) channel at the same time. This mode of operation is more difficult to use than MODE 1. The Home Page The only visible difference in the HOME PAGE from Mode 1 operation is in the Main/Guard status fields. The illustration below depicts the HOME PAGE for a system comprised of two digital RT-5000 radios.
C-5000 Operator’s Manual Setting the Active Transceiver You can toggle the active transceiver for a radio between Main and Guard by pressing the soft keys. The UPPER SOFT key toggles the active transceiver for radio 1. The LOWER SOFT key toggles the active transceiver for radio 2. The following sequence of illustrations demonstrates this process for radio 1. The Main transceiver is currently active. 11 22 123 φ ..
