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SEA 235 Operator's Manual

Digital single sideband radiotelephone
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SEA 235 OPERATOR'S MANUAL
Digital Single Sideband Radiotelephone

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Summary of Contents for SEA SEA 235

  • Page 1 SEA 235 OPERATOR’S MANUAL Digital Single Sideband Radiotelephone...

  • Page 3: Table Of Contents

    TABLE OF CONTENTS GENERAL OPERATIONS ................1 TECHNICAL SPECIFICATIONS ..............1 GENERAL INFORMATION................2 UNDERSTANDING CHANNEL MEMORY ..........3 LCD DISPLAY CHARACTERS ..............4 FRONT PANEL CONTROLS .................4 BASIC OPERATION..................5 TURNING THE RADIO ON ................6 OPERATING THE TRANSMITTER..............6 THE TUNED INDICATOR................6 DEMAND TUNE.....................7 NOISE BLANKER OPERATION ..............7 SELECTING A VOICE CHANNEL..............8 SELECTING A TELEX CHANNEL ...............8 SELECTING A CHANNEL BY BIN NUMBER ..........9...
  • Page 4 CHANGING THE VOGAD CHARACTERISTICS........46 AMATEUR OPERATING SYSTEM .............47 THE RADIO AMATEUR OPERATING SYSTEM........47 FREQUENCY LISTINGS ................49 SEA 235 VOICE FREQUENCY LISTING ...........49 DSC EMERGENCY CALLING FREQUENCIES ........60 SEA 235 TELEX FREQUENCY LISTING...........61 COAST STATIONS PROVIDING TELEX SERVICE.........84 SEA SCRATCH PAD MEMORY LISTING ..........85 SEA SCRATCH PAD WORKSHEET............91...

  • Page 6: General Operations

    GENERAL OPERATIONS TECHNICAL SPECIFICATIONS DIMENSIONS: 3.9” H x 10.5” W x 10.9” D 99mm H x 265mm W x 278mm D WEIGHT: 10 Lbs. 4.5 Kgs. ELECTRICAL: Type Acceptance FCC Parts 80, 87, 90 FCC Identifier BZ6SEA235 Frequency Range (TX) 1.605 - 29.999 MHz (RX) 0.490 - 29.999 MHz Operating Temperature -30 degrees to +60 degrees C...

  • Page 7: General Information

    11.5 volts during transmit conditions. Should this occur, the radio will drop to low power during transmit to prevent distorted transmissions. It is recommended that an authorized SEA dealer perform the installation of your MF/HF equipment to assure proper operation. For complete installation instructions, refer to the “SEA 235 Installation Manual”...

  • Page 8: Understanding Channel Memory

    If the bins do not have the same first three characters, the scan cell will be split into two different cells. For instance, if bin 20 is renamed to “SEA 1”, the KMI scan cell will be split into two cells. One cell will contain bins 13 through 19, while the other cell will contain bins 21 through 30.

  • Page 9: Lcd Display Characters

    GENERAL OPERATIONS LCD DISPLAY CHARACTERS Alphanumeric digits display channel numbers, frequencies and menus. The NOISE BLANKER is activated. The radio is in TRANSMIT. The attached coupler has finished the tune process. Indicates ½ output power during transmit when on steady or ¼...

  • Page 10: Basic Operation

    The display will show the channel number for 2 seconds then change to display the receive frequency. Your SEA 235 is now set to transmit and receive on the selected channel. For instructions on enabling other radio functions, see the table of contents for the page number corresponding to the specific function.

  • Page 11: Turning The Radio On

    THE TUNED INDICATOR The display’s “TND” indicator shows that the SEA 1612 series, SEA 1635 or SEA 1631 antenna tuner has successfully matched the antenna to the radio for maximum radiated power. When the radio tuner mode is enabled,...

  • Page 12: Demand Tune

    For the Demand Tune function to operate, the SEA 1612C or SEA 1635 tuner must have the ‘DTN’ terminal connected to the SEA 235’s rear panel accessory connector P3 pin 10 (DMD TUNE).

  • Page 13: Selecting A Voice Channel

    If the channel does not exist, “NO FREQ” is displayed. SELECTING A TELEX CHANNEL The SEA 235 is capable of telex operations when used with an appropriate modem. Enter the desired three or four digit ITU/SEA telex channel number followed by e.g.

  • Page 14: Selecting A Channel By Bin Number

    GENERAL OPERATIONS SELECTING A CHANNEL BY BIN NUMBER Enter the desired one, two or three digit bin number followed by e.g. The display will show “BIN 24” for 1 second followed by the name tag of the bin selected. Press to cycle between the channel display, frequency display, and alphanumeric name tag displays.

  • Page 15: Entering A Receive Only Frequency

    GENERAL OPERATIONS ENTERING A RECEIVE ONLY FREQUENCY Enter any frequency using four, five, or six digits followed by “ENT”. e.g. 2182 2182 If the frequency entered is less than 490.0 KHz or greater than 29999.99 KHz, the radio will prompt “ILLEGAL” and revert to the last channel entered.

  • Page 16: Sending The Distress Alarm Signal

    GENERAL OPERATIONS SENDING THE DISTRESS ALARM SIGNAL Press to stop any entry in progress. Press to select 2182.0 KHz. 2182 If H3E (AME) mode is required, press repeatedly until “MODE” is displayed. Press then the repeatedly until “AME” appears. Press to select AME mode.

  • Page 17: Override

    CLARIFIER OPERATIONS In the “MARINE” operating system, the clarifier tuning range is limited to ±200 Hz when used on any Bin or ITU/SEA channel. When the radio is turned on, the clarifier step size will default to 10 Hz. Any “receive only” frequency or any frequency Flashing clarifier set for 10 Hz (default) used in the “AMATEUR”...

  • Page 18: Operating The Memory Browse

    Starting at ITU channel 403 Pressing will change the channel to the next channel in memory. The display will then change to frequency mode when an ITU/SEA channel is selected. Pressing will change the channel to the previous channel in memory. The display will...

  • Page 19: Advanced Operations

    If the bins do not have the same first three characters, the scan cell will be split into two different cells. For instance, if bin 20 is renamed to “SEA 1”, the KMI scan cell will be split into two cells. One cell will contain bins 13 through 19, while the other cell will contain bins 21 through 30.
  • Page 20 ADVANCED OPERATIONS PROGRAM MENU SELECTIONS Key Chart 1 - PROGRAM MENU 1...
  • Page 21 ADVANCED OPERATIONS PROGRAM MENU SELECTIONS (cont.) Key Chart 2 - PROGRAM MENU 2...

  • Page 22: Storing The Displayed Frequency

    ADVANCED OPERATIONS STORING THE DISPLAYED FREQUENCY After selecting a channel or commonly used frequency, the displayed information may be saved into any bin location. This will include the mode of operation such as LSB, receive only, etc. To save the displayed information, press to enter the program mode.
  • Page 23 ADVANCED OPERATIONS STORING THE DISPLAYED FREQUENCY (cont.) After accepting or editing the name tag, the operator is again prompted to “PRESS+-”. Pressing will cycle through the final options of “SAVE”, “EDIT” and “EXIT”. Pressing when “SAVE” is displayed will save the information to the bin number chosen.

  • Page 24: Programming A New Frequency

    ADVANCED OPERATIONS PROGRAMMING A NEW FREQUENCY The SEA 235 allows the operator to store a new frequency pair that is not the current displayed frequency. This is useful when more than one bin location is to be programmed while in program mode. This will include the mode of operation such as LSB, receive only, etc.
  • Page 25 ADVANCED OPERATIONS PROGRAMMING A NEW FREQUENCY (cont.) Enter the transmit frequency at the “TX FREQ” prompt. If a receive only channel is needed, press at the “TX FREQ” prompt. The 2182 transmit frequency must be between 1600.0 KHz and 29999.9 KHz. The choices for the “MODE”...
  • Page 26 ADVANCED OPERATIONS PROGRAMMING A NEW FREQUENCY (cont.) Pressing will cycle through the final options of “SAVE”, “EDIT” and “EXIT”. Pressing when “SAVE” is displayed will save the information to the bin number already entered. “EDIT” allows the name tag to be changed or corrected for the selected bin.

  • Page 27: Erasing A Channel

    ADVANCED OPERATIONS ERASING A CHANNEL Any frequency pair located in scratchpad memory may be erased. To erase a frequency pair in a bin location, press to enter program mode. When “STORE” appears on the display, press key until “ERASE” appears. Press at the “ERASE”...

  • Page 28: Changing The Name Tag Of A Bin

    If the bins do not have the same first three characters, the scan cell will be split into two different cells. For instance, if bin 20 is renamed to “SEA 1”, the KMI scan cell will be split into two cells. One cell will contain bins 13 through 19, while the other cell will contain bins 21 through 30.

  • Page 29: Scanning A Channel Group

    Consecutive bin locations that have the same first three characters in their name tag, are known as “scan cells”. SEA has programmed 170 of the 200 possible bins into 23 different scan cells. Scan cells may be as short as one bin or as long as 200 bins but should be kept to a reasonable length for scanning efficiency.

  • Page 30: Direct Frequency

    ADVANCED OPERATIONS DIRECT FREQUENCY When a frequency is entered into the radio, it is a receive only frequency. The ‘Direct Frequency’ function allows the operator to input transmit and receive frequencies along with a mode of operation. To enter a transmit frequency using the direct frequency function press Enter the receive frequency at the “RX FREQ”...

  • Page 31: Intercom

    ADVANCED OPERATIONS INTERCOM When multiple controllers are connected to the SEA 235, the radio may be used as an all station intercom system. Press to start the intercom. Speaking into the microphone when the PTT button is pressed will allow all other controllers to hear what is spoken.

  • Page 32: Function Menus

    FUNCTION MENUS FUNCTION MENU OVERVIEW When the FNC key is pressed, the radio displays the first of four function menus. Each press of the FNC key will display the next function menu. When the last menu item is displayed, the next press of the FNC key will return the radio to normal operations.

  • Page 33: Finding A Bin With The Alpha Menu

    The weather fax groups programmed by SEA have “WFX” as the last part of their name. The first part may be “CG” for Coast Guard or “HI” for Hawaii. NAM is located in Virginia (“VA”) so “VAWFX”...

  • Page 34: Changing The Mode With The Mode Menu

    TELEX, TLX-GW, TLX-PD and AME (2182.0 KHz only) are legal for transmitting. When selected, a prompt will appear asking for a bin or ITU/SEA channel number. Enter the channel number followed by The remaining three modes are LSB, CW and TRUE AM.

  • Page 35: Key Chart 3 - Mode Menu

    FUNCTION MENUS MODE MENU SELECTIONS Key Chart 3 - MODE MENU...

  • Page 36: Selecting The Transmit Power Level

    FUNCTION MENUS SELECTING THE TRANSMIT POWER LEVEL When transmitting, using the lowest amount of power required for reliable communications will help prevent interference with stations located thousands of miles away. Repeatedly press until “POWER” is displayed. Pressing with “POWER” displayed will prompt the operator to “PRESS+-”.

  • Page 37: Key Chart 4 - Power Menu

    FUNCTION MENUS POWER MENU SELECTIONS Key Chart 4 - POWER MENU...

  • Page 38: Changing The Display Illumination

    FUNCTION MENUS CHANGING THE DISPLAY ILLUMINATION Repeatedly press until “DIMMER” is displayed, then press the key. The different displays that appear with each press of the key are the display’s four illumination levels Press at the “MAX” display to set the illumination to maximum brightness.

  • Page 39: Key Chart 5 - Dimmer Menu

    FUNCTION MENUS DIMMER MENU SELECTIONS Key Chart 5 - DIMMER MENU...

  • Page 40: Changing The Squelch Threshold

    FUNCTION MENUS CHANGING THE SQUELCH THRESHOLD Repeatedly press until “SQ ADJ” is displayed, then press the key. Each press of the key will change the squelch threshold setting. Press select the setting. A larger number will require a stronger signal to open the squelch.

  • Page 41: Setup Menu Options

    FUNCTION MENUS SETUP MENU OPTIONS Options in the setup menu contain some settings that rarely need changing. After determining the best settings for a given installation, these options will very seldom be changed. To enter the setup menu, repeatedly press until “SETUP”...

  • Page 42: Key Chart 6 - Setup Menu 1

    FUNCTION MENUS SETUP MENU SELECTIONS Key Chart 6 - SETUP MENU 1...

  • Page 43: Key Chart 7 - Setup Menu 2

    FUNCTION MENUS SETUP MENU SELECTIONS Key Chart 7 - SETUP MENU 2...

  • Page 44: Changing The Key Beep Setting

    FUNCTION MENUS CHANGING THE KEY BEEP SETTING Repeatedly press until “SETUP” is displayed. Pressing with “SETUP” displayed will prompt the operator to “PRESS+-”. Press the key until “BEEP” is displayed then press Each press of the key will change the key beep setting. Press to select the setting of “ON”...

  • Page 45: Changing The Tuner Status

    Select “TNR ON” when the radio will be used with a SEA 1612B, 1612C or 1635 antenna tuner. The “LOW” indicator will appear on the display to show the antenna is not tuned for full output power.

  • Page 46: Changing The Controller Unit Number

    FUNCTION MENUS CHANGING THE CONTROLLER UNIT NUMBER Repeatedly press until “SETUP” is displayed. Pressing with “SETUP” displayed will prompt the operator to “PRESS+-”. Press the key until “UNIT” is displayed then press Each press of the key will change the controller’s assigned number. Press to select the displayed setting.

  • Page 47: Changing The Ssb Audio Input Source

    FUNCTION MENUS CHANGING THE SSB AUDIO INPUT SOURCE Repeatedly press until “SETUP” is displayed. Pressing with “SETUP” displayed will prompt the operator to “PRESS+-”. Press the key until “SSB AF” is displayed then press Each press of the key will change where the radio will get transmit audio when in SSB modes.

  • Page 48: Changing The Telex Audio Input Source

    FUNCTION MENUS CHANGING THE TELEX AUDIO INPUT SOURCE Repeatedly press until “SETUP” is displayed. Pressing with “SETUP” displayed will prompt the operator to “PRESS+-”. Press the key until “TLX AF” is displayed then press Each press of the key will change where the radio will get transmit audio when in TLX modes.

  • Page 49: Changing The Ssb Agc Characteristics

    FUNCTION MENUS CHANGING THE SSB AGC CHARACTERISTICS The SSB AGC controls the radio’s receiver gain when receiving non TELEX mode signals. The characteristics may be changed to one of two settings labeled “FAST” and “SLOW”. The “FAST” setting uses feedforward AGC. Feedforward AGC is an aggressive AGC system that is very noise immune and keeps the audio level fairly constant for received signals of different strength.

  • Page 50: Changing The Telex Agc Characteristics

    FUNCTION MENUS CHANGING THE TELEX AGC CHARACTERISTICS The TLX AGC controls the radio’s receiver gain when receiving TELEX mode signals. The characteristics may be changed to one of two settings labeled “FAST” and “SLOW”. The “FAST” setting uses feedforward AGC. Feedforward AGC is an aggressive AGC system that is very noise immune and keeps the audio level fairly constant for received signals of different strength.

  • Page 51: Changing The Vogad Characteristics

    FUNCTION MENUS CHANGING THE VOGAD CHARACTERISTICS Repeatedly press until “SETUP” is displayed. Pressing with “SETUP” displayed will prompt the operator to “PRESS+-”. Press the key until “VOGAD” is displayed then press Each press of the key will change the VOGAD characteristics. Press select the displayed setting.

  • Page 52: Amateur Operating System

    AMATEUR OPERATING SYSTEM THE RADIO AMATEUR OPERATING SYSTEM Primarily designed to be used in marine applications, the SEA 235 may also be used as an amateur radio transceiver. When power is first applied to the radio, the “MARINE” operating system is automatically started. Due to the stringent operating requirements used for marine operations, this mode is very restrictive for a licensed amateur radio operator working the ham bands.
  • Page 53 AMATEUR OPERATING SYSTEM...

  • Page 54: Frequency Listings

    FREQUENCY LISTINGS SEA 235 VOICE FREQUENCY LISTING VOICE SHIP SHIP CHANNEL RECEIVE TRANSMIT 2003.0 2003.0 Ship-to-Ship, Great Lakes 2450.0 2003.0 KMI Point Reyes, CA 2006.0 2006.0 Alaska 2446.0 2009.0 WLO, Mobile, AL 2506.0 2009.0 WAH, St. Thomas 2030.0 2030.0 Virgin Islands, Intership 2490.0...
  • Page 55 FREQUENCY LISTINGS SEA 235 VOICE FREQUENCY LISTING VOICE SHIP SHIP CHANNEL RECEIVE TRANSMIT 2582.0 2206.0 WBL, Buffalo, NY VCS, Halifax, Canada 2397.0 2237.0 WDV-26, Cordova WGG-56, Ketchikan, AK 2400.0 2240.0 WGG-58, Juneau, AK WGG-55, Nome, AK 2735.0 2290.0 9YL, North Post, Trinidad 2450.0...
  • Page 56 FREQUENCY LISTINGS SEA 235 VOICE FREQUENCY LISTING VOICE SHIP SHIP CHANNEL RECEIVE TRANSMIT 2735.0 2735.0 9YL, North Post, Trinidad 2738.0 2738.0 Ship-to-Ship Except Great Lakes and Gulf 2782.0 2782.0 Ship-to-Ship River WFN, Jeffersonville, IN WGK, St. Louis, MO WJG, Memphis, TN 2830.0...
  • Page 57 FREQUENCY LISTINGS SEA 235 VOICE FREQUENCY LISTING VOICE SHIP SHIP CHANNEL RECEIVE TRANSMIT 4387.0 4095.0 WOO, Manahawkin, NJ 4390.0 4098.0 WOM, Ft. Lauderdale, FL 4393.0 4101.0 4396.0 4104.0 WLO, Mobile, AL 4399.0 4107.0 4402.0 4110.0 KMI, Point Reyes, CA WOO, Manahawkin, NJ 4405.0...
  • Page 58 FREQUENCY LISTINGS SEA 235 VOICE FREQUENCY LISTING VOICE SHIP SHIP CHANNEL RECEIVE TRANSMIT 5680.0 5680.0 Aero Search/Rescue 5472.0 5472.0 Aero Search/Rescue 5490.0 5490.0 Aero 6501.0 6200.0 NMN, Portsmouth, VA NMG, New Orleans, LA MNA, Miami, FL 6504.0 6203.0 6507.0 6206.0 6510.0...
  • Page 59 FREQUENCY LISTINGS SEA 235 VOICE FREQUENCY LISTING VOICE SHIP SHIP CHANNEL RECEIVE TRANSMIT 8758.0 8234.0 WOM, Ft. Lauderdale, FL 8761.0 8237.0 WOO, Manahawkin, NJ 8764.0 8240.0 8767.0 8243.0 8770.0 8246.0 8773.0 8249.0 8776.0 8252.0 8779.0 8255.0 8782.0 8258.0 KMI, Point Reyes, CA 8785.0...
  • Page 60 FREQUENCY LISTINGS SEA 235 VOICE FREQUENCY LISTING VOICE SHIP SHIP CHANNEL RECEIVE TRANSMIT 1207 13095.0 12248.0 1208 13098.0 12251.0 WOM, Ft. Lauderdale, FL 1209 13101.0 12254.0 WOM, Ft. Lauderdale, FL 1210 13104.0 12257.0 WOO, Manahawkin, NJ 1211 13107.0 12260.0 WOO, Manahawkin, NJ 1212 13110.0...
  • Page 61 FREQUENCY LISTINGS SEA 235 VOICE FREQUENCY LISTING VOICE SHIP SHIP CHANNEL RECEIVE TRANSMIT 1250 12290.0 12290.0 DISTRESS 1251 12353.0 12353.0 12A LTD Coast/Intership 1252 12356.0 12356.0 12B LTD Coast/Intership 1253 12359.0 12359.0 12C LTD Coast/Intership 1254 12362.0 12362.0 PUB. COAST & Miss. River 1255 12365.0...
  • Page 62 FREQUENCY LISTINGS SEA 235 VOICE FREQUENCY LISTING VOICE SHIP SHIP CHANNEL RECEIVE TRANSMIT 1633 17338.0 16456.0 1634 17341.0 16459.0 1635 17344.0 16462.0 1636 17347.0 16465.0 1637 17350.0 16468.0 1638 17353.0 16471.0 1639 17356.0 16474.0 1640 17359.0 16477.0 1641 17362.0 16480.0...
  • Page 63 FREQUENCY LISTINGS SEA 235 VOICE FREQUENCY LISTING VOICE SHIP SHIP CHANNEL RECEIVE TRANSMIT 1813 19791.0 18816.0 1814 19794.0 18819.0 1815 19797.0 18822.0 1851 18840.0 18840.0 18A LTD Coast/Intership 1852 18843.0 18843.0 18B LTD Coast/Intership 1853 18825.0 18825.0 1854 18828.0 18828.0 1855 18831.0...
  • Page 64 FREQUENCY LISTINGS SEA 235 VOICE FREQUENCY LISTING VOICE SHIP SHIP CHANNEL RECEIVE TRANSMIT 2228 22777.0 22081.0 KMI, Point Reyes, CA 2229 22780.0 22084.0 2230 22783.0 22087.0 2231 22786.0 22090.0 2232 22789.0 22093.0 2233 22792.0 22096.0 2234 22795.0 22099.0 2235 22798.0 22102.0...

  • Page 65: Dsc Emergency Calling Frequencies

    FREQUENCY LISTINGS SEA 235 VOICE FREQUENCY LISTING VOICE SHIP SHIP CHANNEL RECEIVE TRANSMIT 2507 26163.0 25088.0 2508 26166.0 25091.0 2509 26169.0 25094.0 2510 26172.0 25097.0 2551 25115.0 25115.0 25A LTD Coast/Intership 2552 25118.0 25118.0 25B LTD Coast/Intership 2553 25100.0 25100.0 2554 25103.0...

  • Page 66: Sea 235 Telex Frequency Listing

    FREQUENCY LISTINGS SEA 235 TELEX FREQUENCY LISTING TELEX SHIP SHIP CHANNEL RECEIVE TRANSMIT 4210.5 4172.5 4211.0 4173.0 4211.5 4173.5 4212.0 4174.0 4212.5 4174.5 4213.0 4175.0 WLO, VIP 4213.5 4175.5 4214.0 4176.0 KLB, WPD 4214.5 4176.6 4215.0 4177.0 4177.5 4177.5 NBDP EMER CALLING 4215.5...
  • Page 67 FREQUENCY LISTINGS SEA 235 TELEX FREQUENCY LISTING TELEX SHIP SHIP CHANNEL RECEIVE TRANSMIT 6318.5 6267.0 6319.0 6267.5 6268.0 6268.0 NBDP EMER CALLING 6319.5 6268.5 6320.0 6269.0 6320.5 6269.5 6521.0 6270.0 6321.5 6270.5 6322.0 6271.0 6322.5 6271.5 6323.0 6272.0 6323.5 6272.5 6324.0...
  • Page 68 FREQUENCY LISTINGS SEA 235 TELEX FREQUENCY LISTING TELEX SHIP SHIP CHANNEL RECEIVE TRANSMIT 6306.5 6306.5 6307.0 6307.0 6307.5 6307.5 6308.0 6308.0 6308.5 6308.5 6309.0 6309.0 6309.5 6309.5 6310.0 6310.0 6310.5 6310.5 6311.0 6311.0 6311.5 6311.5 8376.5 8376.5 NBDP EMER CALLING 8417.0...
  • Page 69 FREQUENCY LISTINGS SEA 235 TELEX FREQUENCY LISTING TELEX SHIP SHIP CHANNEL RECEIVE TRANSMIT 8430.0 8390.0 8430.5 8390.5 8431.0 8391.0 8431.5 8391.5 8432.0 8392.0 8432.5 8392.5 8433.0 8393.0 8433.5 8393.5 8434.0 8394.0 8434.5 8394.5 8435.0 8395.0 8435.5 8395.5 8436.0 8396.0 8396.5 8396.5...
  • Page 70 FREQUENCY LISTINGS SEA 235 TELEX FREQUENCY LISTING TELEX SHIP SHIP CHANNEL RECEIVE TRANSMIT 8409.0 8409.0 8409.5 8409.5 8410.0 8410.0 8410.5 8410.5 8411.0 8411.0 8411.5 8411.5 8412.0 8412.0 8412.5 8412.5 8413.0 8413.0 8413.5 8413.5 8414.0 8414.0 1201 12579.5 12477.0 1202 12580.0 12477.5...
  • Page 71 FREQUENCY LISTINGS SEA 235 TELEX FREQUENCY LISTING TELEX SHIP SHIP CHANNEL RECEIVE TRANSMIT 1228 12593.0 12490.5 1229 12593.5 12491.0 1230 12594.0 12491.5 1231 12594.5 12492.0 1232 12595.0 12492.5 1233 12595.5 12493.0 1234 12596.0 12493.5 1235 12596.5 12494.0 1236 12597.0 12494.5 1237 12597.5...
  • Page 72 FREQUENCY LISTINGS SEA 235 TELEX FREQUENCY LISTING TELEX SHIP SHIP CHANNEL RECEIVE TRANSMIT 1267 12612.5 12510.0 1268 12613.0 12510.5 1269 12613.5 12511.0 1270 12614.0 12511.5 1271 12614.5 12512.0 1272 12615.0 12512.5 1273 12615.5 12513.0 1274 12616.0 12513.5 1275 12616.5 12514.0 1276 12617.0...
  • Page 73 FREQUENCY LISTINGS SEA 235 TELEX FREQUENCY LISTING TELEX SHIP SHIP CHANNEL RECEIVE TRANSMIT 1306 12631.5 12529.5 1307 12632.0 12530.0 1308 12632.5 12530.5 1309 12633.0 12531.0 1310 12633.5 12531.5 1311 12634.0 12532.0 1312 12634.5 12532.5 1313 12635.0 12533.0 1314 12635.5 12533.5 1315 12636.0...
  • Page 74 FREQUENCY LISTINGS SEA 235 TELEX FREQUENCY LISTING TELEX SHIP SHIP CHANNEL RECEIVE TRANSMIT 1345 12651.0 12549.0 1346 12651.5 12549.5 1347 12652.0 12555.0 1348 12652.5 12555.5 1349 12653.0 12556.0 1350 12653.5 12556.5 1351 12654.0 12557.0 1352 12654.5 12557.5 1353 12655.0 12558.0 1354 12655.5...
  • Page 75 FREQUENCY LISTINGS SEA 235 TELEX FREQUENCY LISTING TELEX SHIP SHIP CHANNEL RECEIVE TRANSMIT 1397 12573.0 12573.0 1398 12573.5 12573.5 1399 12574.0 12574.0 1400 12574.5 12574.5 1401 12575.0 12575.0 1402 12575.5 12575.5 1403 12576.0 12576.0 1404 12576.5 12576.5 1601 16807.0 16683.5 1602 16807.5...
  • Page 76 FREQUENCY LISTINGS SEA 235 TELEX FREQUENCY LISTING TELEX SHIP SHIP CHANNEL RECEIVE TRANSMIT 1631 16821.5 16698.5 1632 16822.0 16699.0 1633 16822.5 16699.5 1634 16823.0 16700.0 1635 16823.5 16700.5 1636 16824.0 16701.0 1637 16824.5 16701.5 1638 16825.0 16702.0 1639 16825.5 16702.5 1640 16826.0...
  • Page 77 FREQUENCY LISTINGS SEA 235 TELEX FREQUENCY LISTING TELEX SHIP SHIP CHANNEL RECEIVE TRANSMIT 1670 16841.0 16718.0 1671 16841.5 16718.5 1672 16842.0 16719.0 1673 16842.5 16719.5 1674 16843.0 16720.0 1675 16843.5 16720.5 1676 16844.0 16721.0 1677 16844.5 16721.5 1678 16845.0 16722.0 1679 16845.5...
  • Page 78 FREQUENCY LISTINGS SEA 235 TELEX FREQUENCY LISTING TELEX SHIP SHIP CHANNEL RECEIVE TRANSMIT 1709 16860.5 16742.5 1710 16861.0 16743.0 1711 16861.5 16743.5 1712 16862.0 16744.0 1713 16862.5 16744.5 1714 16863.0 16745.0 1715 16863.5 16745.5 1716 16864.0 16746.0 1717 16864.5 16746.5 1718 16865.0...
  • Page 79 FREQUENCY LISTINGS SEA 235 TELEX FREQUENCY LISTING TELEX SHIP SHIP CHANNEL RECEIVE TRANSMIT 1748 16880.0 16762.0 1749 16880.5 16762.5 1750 16881.0 16763.0 1751 16881.5 16763.5 1752 16882.0 16764.0 1753 16882.5 16764.5 1754 16883.0 16765.0 1755 16883.5 16765.5 1756 16884.0 16766.0 1757 16884.5...
  • Page 80 FREQUENCY LISTINGS SEA 235 TELEX FREQUENCY LISTING TELEX SHIP SHIP CHANNEL RECEIVE TRANSMIT 1787 16899.5 16781.5 1788 16900.0 16782.0 1789 16900.5 16782.5 1790 16901.0 16783.0 1791 16901.5 16783.5 1792 16902.0 16784.0 1793 16902.5 16784.5 1794 16796.5 16796.5 1795 16797.0 16797.0 1796 16797.5...
  • Page 81 FREQUENCY LISTINGS SEA 235 TELEX FREQUENCY LISTING TELEX SHIP SHIP CHANNEL RECEIVE TRANSMIT 1825 19693.0 18882.5 1826 19693.5 18883.0 1827 19694.0 18883.5 1828 19694.5 18884.0 1829 19695.0 18884.5 1830 19695.5 18885.0 1831 19696.0 18885.5 1832 19696.5 18886.0 1833 19697.0 18886.5 1834 19697.5...
  • Page 82 FREQUENCY LISTINGS SEA 235 TELEX FREQUENCY LISTING TELEX SHIP SHIP CHANNEL RECEIVE TRANSMIT 2206 22379.0 22287.0 2207 22379.5 22287.5 2208 22380.0 22288.0 2209 22380.5 22288.5 2210 22381.0 22289.0 2211 22381.5 22289.5 2212 22382.0 22290.0 2213 22382.5 22290.5 2214 22383.0 22291.0 2215 22383.5...
  • Page 83 FREQUENCY LISTINGS SEA 235 TELEX FREQUENCY LISTING TELEX SHIP SHIP CHANNEL RECEIVE TRANSMIT 2245 22398.5 22306.5 2246 22399.0 22307.0 2247 22399.5 22307.5 2248 22400.0 22308.0 2249 22400.5 22308.5 2250 22401.0 22309.0 2251 22401.5 22309.5 2252 22402.0 22310.0 2253 22402.5 22310.5 2254 22403.0...
  • Page 84 FREQUENCY LISTINGS SEA 235 TELEX FREQUENCY LISTING TELEX SHIP SHIP CHANNEL RECEIVE TRANSMIT 2284 22418.0 22326.0 2285 22418.5 22326.5 2286 22419.0 22327.0 2287 22419.5 22327.5 2288 22420.0 22328.0 2289 22420.5 22328.5 2290 22421.0 22329.0 2291 22421.5 22329.5 2292 22422.0 22330.0 2293 22422.5...
  • Page 85 FREQUENCY LISTINGS SEA 235 TELEX FREQUENCY LISTING TELEX SHIP SHIP CHANNEL RECEIVE TRANSMIT 2323 22437.5 22345.5 2324 22438.0 22346.0 2325 22438.5 22346.5 2326 22439.0 22347.0 2327 22439.5 22347.5 2328 22440.0 22348.0 2329 22440.5 22348.5 2330 22441.0 22349.0 2331 22441.5 22349.5 2332 22442.0...
  • Page 86 FREQUENCY LISTINGS SEA 235 TELEX FREQUENCY LISTING TELEX SHIP SHIP CHANNEL RECEIVE TRANSMIT 2396 22364.5 22364.5 2397 22365.0 22365.0 2398 22365.5 22365.5 2399 22366.0 22366.0 2400 22366.5 22366.5 2401 22367.0 22367.0 2402 22367.5 22367.5 2403 22368.0 22368.0 2404 22368.5 22368.5 2405 22369.0...
  • Page 87 FREQUENCY LISTINGS SEA 235 TELEX FREQUENCY LISTING TELEX SHIP SHIP CHANNEL RECEIVE TRANSMIT 2520 26110.5 25182.5 2521 26111.0 25183.0 2522 26111.5 25183.5 2523 26112.0 25184.0 2524 26112.5 25184.5 2525 26113.0 25185.0 2528 26113.5 25185.5 2527 26114.0 25186.0 2528 26114.5 25186.5 2529 26115.0...
  • Page 88 FREQUENCY LISTINGS SEA 235 TELEX FREQUENCY LISTING TELEX SHIP SHIP CHANNEL RECEIVE TRANSMIT 2587 25201.0 25201.0 2588 25201.5 25201.5 2589 25202.0 25202.0 2590 25202.5 25202.5 2591 25203.0 25203.0 2592 25203.5 25203.5 2593 25204.0 25204.0 2594 25204.5 25204.5 2595 25205.0 25205.0 2596 25205.5...

  • Page 89: Coast Stations Providing Telex Service

    FREQUENCY LISTINGS COAST STATIONS PROVIDING TELEX SERVICE CALL SIGN STATION SELCALL # Dutch Harbor, AK 1115 Seattle, WA 1113 San Francisco, CA 1091 Galveston, TX 1101 Mobile, AL 1090 Tampa, FL 1102 Chatham, MA 1092 St. Johns, Newfoundland, 1094 Canada Hawaii, Pacific Ocean 1094 Palo Alto (San Francisco, CA)

  • Page 90: Sea Scratch Pad Memory Listing

    FREQUENCY LISTINGS SEA SCRATCH PAD MEMORY LISTING BIN # FREQUENCY FREQUENCY MODE NAME TAG 2500.0 [WWV 1] 5000.0 [WWV 2] 10000.0 [WWV 3] 15000.0 [WWV 4] 20000.0 [WWV 5] 2182.0 2182.0 [EMER ] 2142.0 2142.0 [SAFTY 2] 4125.0 4125.0 [SAFTY 4] 6215.0...
  • Page 91 FREQUENCY LISTINGS SEA SCRATCH PAD MEMORY LISTING BIN # FREQUENCY FREQUENCY MODE NAME TAG 4363.0 4071.0 [WOM 403] 4390.0 4098.0 [WOM 412] 4405.0 4113.0 [WOM 417] 4423.0 4131.0 [WOM 423] 8722.0 8198.0 [WOM 802] 8731.0 8207.0 [WOM 805] 8746.0 8222.0 [WOM 810] 8758.0...
  • Page 92 FREQUENCY LISTINGS SEA SCRATCH PAD MEMORY LISTING BIN # FREQUENCY FREQUENCY MODE NAME TAG 13083.0 12236.0 [WOO1203] 13104.0 12257.0 [WOO1210] 13107.0 12260.0 [WOO1211] 13158.0 12311.0 [WOO1228] 17254.0 16372.0 [WOO1605] 17299.0 16417.0 [WOO1620] 17317.0 16435.0 [WOO1626] 17332.0 16450.0 [WOO1631] 22696.0 22000.0 [WOO2201] 22708.0...
  • Page 93 FREQUENCY LISTINGS SEA SCRATCH PAD MEMORY LISTING BIN # FREQUENCY FREQUENCY MODE NAME TAG 18843.0 18843.0 [BUSOP23] 22159.0 22159.0 [BUSOP24] 22162.0 22162.0 [BUSOP25] 22165.0 22165.0 [BUSOP26] 22168.0 22168.0 [BUSOP27] 22171.0 22171.0 [BUSOP28] 25115.0 25115.0 [BUSOP29] 25118.0 25118.0 [BUSOP30] 4344.1 [PACWFX1] 8680.1...
  • Page 94 FREQUENCY LISTINGS SEA SCRATCH PAD MEMORY LISTING BIN # FREQUENCY FREQUENCY MODE NAME TAG 4269.1 [NSWFX 1] 6495.1 [NSWFX 2] 10534.1 [NSWFX 3] 13508.1 [NSWFX 4] 13282.0 [HIVWX 1] 13270.0 [NYVWX 1] 2054.0 2054.0 [SHIP 1] 2065.0 2065.0 [SHIP 2] 2079.0...
  • Page 95 FREQUENCY LISTINGS SEA SCRATCH PAD MEMORY LISTING BIN # FREQUENCY FREQUENCY MODE NAME TAG...

  • Page 96: Sea Scratch Pad Worksheet

    FREQUENCY LISTINGS SEA SCRATCH PAD WORKSHEET BIN # FREQUENCY FREQUENCY MODE NAME TAG...
  • Page 97 FREQUENCY LISTINGS SEA SCRATCH PAD WORKSHEET BIN # FREQUENCY FREQUENCY MODE NAME TAG...

  • Page 98: Ssb Propagation Tables

    FREQUENCY LISTINGS SSB PROPAGATION TABLES TYPICAL FREQUENCY PROPAGATION: SPRING AND SUMMER BAND 4 MHz 8 MHz 12 MHz 16 MHz 22 MHz Propagation (Miles) Hours after sunset 1000 3500 6000 1500 7000 1500 3500 6000 2000 3500 2500 1000 2500 1500 3000 1500...
  • Page 99 FREQUENCY LISTINGS SSB PROPAGATION TABLES TYPICAL FREQUENCY PROPAGATION: FALL AND WINTER BAND 4 MHz 8 MHz 12 MHz 16 MHz 22 MHz Propagation (Miles) Hours after sunset 2000 3500 6000 1500 7000 2000 4000 6000 1000 2000 4000 1000 2500 4000 1000 3000...

  • Page 100: Rear Panel

    “toggle” the power control circuitry in the SEA 235 to the opposite state. DB-9 COMPUTER INTERFACE - P2: A 6-pole dip switch, located inside the SEA 235 on the mainboard, is used to disconnect all lines EXCEPT the RS232 serial connections when operation with a computer is intended.
  • Page 101 Pin 9 - Internal switch ON supplies extra ground pin. (SW1-5). NOTE: The SEA 235 is shipped with internal switches in the OFF position. This will allow a general purpose RS232 port on Pins 3,4 and 5 and removes all other connections to the remaining DB-9 pins.

  • Page 102: Glossary

    GLOSSARY DEFINITIONS This manual assumes basic HF SSB radiotelephone knowledge. Below are definitions of acronyms used in the operating instructions. AF: Audio Frequency AGC: Used in the receiver of a radio, the Automatic Gain Control adjusts the radio circuitry to compensate for large and small signals. ALC: Automatic Level Control keeps the transmit power from overshooting.
  • Page 104 7030 220 St. S.W. Mountlake Terrace, Washington 98043 USA 425-771-2182 FAX: 425-771-2650 http://www.sea-dmi.com OPR-235 7/99 Rev. 2...

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