SEA_235_user.pdf

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1、SEA 235 OPERATORS MANUAL Digital Single Sideband Radiotelephone 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

2、 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 CHANGING THE DISPLAY VIEW.9 ENTERING A RECEIVE ONLY FREQUENCY.10 SELECTING THE EMERGENCY CHANNEL.10 SENDING THE DISTRESS ALARM SIGNAL.11 OVERRIDE

3、.12 SQUELCH OPERATION.12 CLARIFIER OPERATIONS.12 OPERATING THE MEMORY BROWSE.13 ADVANCED OPERATIONS.14 SELECTING THE PROGRAM MENU.14 STORING THE DISPLAYED FREQUENCY.17 PROGRAMMING A NEW FREQUENCY.19 ERASING A CHANNEL.22 CHANGING THE NAME TAG OF A BIN.23 SCANNING A CHANNEL GROUP .24 DIRECT FREQUENCY.

4、25 INTERCOM.26 FUNCTION MENUS .27 FUNCTION MENU OVERVIEW.27 FINDING A BIN WITH THE ALPHA MENU.28 CHANGING THE MODE WITH THE MODE MENU.29 SELECTING THE TRANSMIT POWER LEVEL.31 CHANGING THE DISPLAY ILLUMINATION .33 CHANGING THE SQUELCH THRESHOLD.35 TABLE OF CONTENTS SETUP MENU OPTIONS.36 CHANGING THE

5、KEY BEEP SETTING .39 CHANGING THE TUNER STATUS.40 CHANGING THE CONTROLLER UNIT NUMBER .41 CHANGING THE SSB AUDIO INPUT SOURCE.41 CHANGING THE TELEX AUDIO INPUT SOURCE .43 CHANGING THE SSB AGC CHARACTERISTICS.44 CHANGING THE TELEX AGC CHARACTERISTICS.45 CHANGING THE VOGAD CHARACTERISTICS.46 AMATEUR O

6、PERATING 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 SSB PROP

7、AGATION TABLES.93 REAR PANEL.95 REAR PANEL CONNECTIONS.95 GLOSSARY.97 LIST OF FIGURES Key Chart 1 - PROGRAM MENU 1.15 Key Chart 2 - PROGRAM MENU 2.16 Key Chart 3 - MODE MENU .30 Key Chart 4 - POWER MENU .32 Key Chart 5 - DIMMER MENU.34 Key Chart 6 - SETUP MENU 1.37 Key Chart 7 - SETUP MENU 2.38 GENE

8、RAL OPERATIONS 1 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 AcceptanceFCC Parts 80, 87, 90 FCC IdentifierBZ6SEA235 Frequency Range(TX) 1.605 - 29.999 MHz (RX) 0.490 - 29.999 MHz Operating Temperature-30 degrees

9、 to +60 degrees C Frequency Stability 10 Hz Operating ModesJ3E, R3E, H3E (2182 KHz) A1A (CW), F2B (TELEX) Primary Voltage13.6 V DC 15% (11.6 - 15.6 V DC) Negative Rail Common to Chassis Current DrainReceive Standby 1 Amp Receive Full Audio1.5 Amps Transmit Voice11 Amps Transmit Two-Tone17 Amps Trans

10、mit TELEX22 Amps Output Impedance50 ohms Transmitter Output PowerR3E, J3E150 Watts PEP F2B150 Watts LOW50 - 75 Watts VLOW25 - 40 Watts Receiver Sensitivity 1 V for 12 dB SINAD Audio Output4 W 10% distortion into external 4 ohm load. GENERAL OPERATIONS 2 GENERAL INFORMATION CAUTION ! Do not attempt t

11、o transmit until the radiotelephone has warmed up for at least 3 minutes. Transmitting before the 3 minute warm up period can cause a violation of the Federal Communications Commission regulations. PROPAGATION Medium Frequencies (MF) in the range of 300 KHz to 3 MHz propagate far beyond the horizon.

12、 MF frequencies are generally usable within 300 miles depending on the time of day, atmospheric conditions and man-made noise levels. High Frequencies (HF) in the range of 3 MHz to 30 MHz allow communications over thousands of miles, again subject to the time of day and atmospheric conditions. Inter

13、ference tends to be more of a problem than on Very High Frequencies (VHF) in the range of 30 MHz to 300 MHz. To further understand MF/HF propagation, SEAs “Mariners Guide to Single Sideband” (MAN-0001-001) is highly recommended reading. INSTALLATION (RF grounding & DC connections) A radio frequency

14、(RF) ground with a minimum of 100 sq. ft. is required for proper operation. This ground system is not unique to SEA equipment. All marine MF/HF radios have the same installation requirements for maximum efficiency. Every connection to the ground should be made with a minimum of 2” wide copper strap.

15、 Proper wire size must be used between the radio and power supply to prevent the DC (direct current) voltage at the radio from dropping below 11.5 volts during transmit conditions. Should this occur, the radio will drop to low power during transmit to prevent distorted transmissions. It is recommend

16、ed 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” (OPR-235-INST) supplied with the radio. RADIO PROTECTION The SEA 235 monitors radio conditions such as DC s

17、upply voltage, internal temperature and antenna VSWR. When these conditions are outside the preset limits, the radio will revert to low power (approximately 75 Watts). The displays LOW indicator will light to indicate this condition. If this should occur during an EMERGENCY situation, pressing will

18、override the monitoring sensors and allow FULL output power. The radio will stay in the EMERGENCY OVERRIDE condition until the radio power is re- cycled. 6FNC6 GENERAL OPERATIONS 3 UNDERSTANDING CHANNEL MEMORY CHANNELS Nearly 1000 frequency pairs are stored as permanent channels in the SEA 235. Thes

19、e channels are recalled by their assigned ITU or SEA channel number. ITU numbers are known internationally and include all duplex frequency pairs starting at 4 MHz and ending with 25 MHz. SEA numbers are assigned to those frequencies that do not have an assigned ITU number. Currently all 2 to 3 MHz

20、frequencies and all simplex frequencies are assigned SEA channel numbers. It is important to note that not all radios use the same channel numbers for simplex or 2 to 3 MHz frequencies. Some radios use an “A”, “B”, “C” channel assignment for frequencies not assigned an ITU channel number. For exampl

21、e, if you refer to the SEA simplex channel 451 during communications, the person you are communicating with may not have a channel 451. Their radio may have the same frequency (4146.0 KHz) assigned to channel “4A”. For reliable communications, always refer to the frequency when referencing simplex c

22、hannels or frequencies below 4 MHz. BINS In addition to the permanent memory, 200 user programmable channels known as bins have been assigned for “scratchpad” memory. Approximately 170 of these 200 channels have been programmed by SEA but may be changed at any time. Bins may be programmed with any f

23、requency, mode of transmission and given a name tag besides a bin number. SCAN CELLS Consecutive bin numbers 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 shor

24、t as one bin or as long as 200 bins but should be kept to a reasonable length for scanning efficiency. Each scan cell is organized with frequency pairs that are related to one another. For example, bins 13 through 30 have been programmed with frequencies assigned to the coast station KMI. Since the

25、name tags first three characters are “KMI”, and the bins are consecutively numbered, the bins may be scanned as a group. 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 wil

26、l be split into two cells. One cell will contain bins 13 through 19, while the other cell will contain bins 21 through 30. Bin 20 will be a single channel scan cell called “SEA”. Scanning “KMI” could be done by scanning bins 13 through 19 OR bins 21 through 30 but not both at the same time. Care sho

27、uld be given that a scan cell is not split unintentionally. Bins that will not be scanned can be given any descriptive name tag. GENERAL OPERATIONS 4 DN UP LCD DISPLAY CHARACTERS Alphanumeric digits display channel numbers, frequencies and menus. The NOISE BLANKER is activated. The radio is in TRANS

28、MIT. The attached coupler has finished the tune process. Indicates output power during transmit when on steady or output power when flashing. The radio will transmit a reduced carrier (H3E) of approximately 40W. This mode is only available on the emergency frequency 2182.0 KHz. Both transmit and rec

29、eive will use LOWER SIDEBAND mode. TELEX (J2B) mode will be used for transmit and receive. The receiver SQUELCH is activated. Relative output power when transmitting and audio signal strength during receive. No bars indicates weak signal. FRONT PANEL CONTROLS Toggles power on/off. Used to enter chan

30、nel/frequency information and menu selections. used alone, recalls emergency frequency 2182.0 KHz. Toggles alarm generator test on/off. Enables receiver noise blanker. When used with , transmits alarm signal. Toggles squelch on/off. Toggles display to show channel / bin #, frequency, or alpha name.

31、Accesses function menus and other function commands. Selects displayed funtion menu or completes keyed entry. Increases receiver frequency and scrolls selected function options. Decreases receiver frequency and scrolls selected function options. ENT NB TX TND LOW AME LSB TLX SQL 0 9 PWR ALRM NB SEND

32、 SQL CH FX FNC ALRM 0 2182 GENERAL OPERATIONS 5 BASIC OPERATION To turn the radio on, press Wait 3 minutes for the synthesizer frequency to stabilize before transmitting. Rotate the volume control clockwise to increase the volume level. Pressto activate the squelch. Enter the desired channel number

33、in three or four digit form, followed by the key. e.g. 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 co

34、ntents for the page number corresponding to the specific function. Illustrations in this manual reflect the use of an attached SEA 1635 tuner. Differences in tuner choice or radio programming may produce varying displays. LOWSQL TND LOWSQL 451ENT ENT SQL PWR NB SEND SQL CH FX PWRALRM 1 4 7 FNC 2 5 8

35、 0 2182 3 6 9 ENT UP DN NB TX TND LOW AME LSB TLX SQL SEA 235 HF/SSB DIGITAL RADIOTELEPHONE GENERAL OPERATIONS 6 TURNING THE RADIO ON Press All display segments will be shown for a short period followed by the radio model number, then the controller (CT) and transceiver (RT) software versions. The r

36、adio will then be set to the MARINE mode on international emergency frequency 2182.0 KHz using USB, J3E mode. Wait 3 minutes for the synthesizer frequency to stabilize before transmitting. OPERATING THE TRANSMITTER Keying the microphone push-to-talk button will switch the transmitter circuits on, indicated by the “TX” indicator appearing on th