How do you test MF and HF?
How do you test MF and HF?
Printer test checks the connection between MF/HF equipment and printer. Go to Menu#2 -> READOUT & SET UP -> press 4 -> press ENT. This displays the “SELF TEST” screen. Select the “printer test” and press ENT.
What is MF HF DSC?
The MF/HF has Digital Selective Calling (DSC*) as standard with a built in Class A 6CH DSC watch-keeping receiver. You can transmit and receive digital selective calls for quick and efficient establishment of distress, urgency, safety and routine communication with other ships and coast stations.
What is the MF DSC frequency?
2187.5 Hz
The procedure for testing the ship’s equipment used for DSC distress, urgency and safety calls on HF by transmitting DSC test calls on HF DSC distress channels is the same as for testing on the MF DSC distress frequency 2187.5 Hz.
What are the main purpose of MF HF DSC?
Primarily, DSC is designed to set up ship-to-ship, ship-to-shore and shore-to-ship radiotelephone and MF/HF radiotelex calls. DSC calls can also be made to individual stations, groups of stations, or “all stations” on the same radio band.
How do I test my DSC radio?
To test your radio’s DSC operation, find a friend’s boat that also has an MMSI number. Enter that number in your radio’s address book. Then select and send to that number; an audible tone will sound and your ID will appear on your friend’s radio’s display.
What are the common frequencies for distress?
International Distress/Emergency Frequencies 121.5 MHz: International Aeronautical Emergency Frequency. 156.8 MHz: International Maritime Distress, Calling and Safety Frequency. 243.0 MHz: NATO Combined Distress and Emergency Frequency. 406.0 MHz: Emergency Position Indicating Locator Beacon (EPIRB).
What is the range of MF HF?
Typically Marine MF/HF-SSB radios operate in the frequency range of 1.6 MHz to 30 MHz.
What is the difference between MF and HF?
Medium Frequencies (MF) designated for marine communication range between 1605 kHz to 3800 kHz and are called “t” band. High Frequencies (HF) designated for marine communication range between 4000 kHz to 27500 kHz and are called “u” band. Only the first five are used for distress and safety communication.
Are DSC calls private?
The DSC system was designed to serve primarily as a means of instantly sending a distress call with your boat’s identity and position. “The major advantage of DSC voice communications is that it lets you privately hail another boat and preselect a channel on which to talk.”
How does DSC VHF work?
DSC allows the radio to transfer information digitally, not just by voice, and to instantly send a digital distress alert to the Coast Guard. Part of that alert is a nine-digit Maritime Mobile Service Identity (MMSI) number that identifies the boat. If a boat is adrift with dead batteries, the radio won’t help.
How to do the MF / HF test on JRC?
To do so on JRC, Press Menu on the MF/HF controller -> scroll the dial to go to “Power” option -> set the power to High -> press Enter. Even after setting the power to High, still you may not get acknowledgment from shore station. In this case first switch off the MF/HF equipment and clean the transmitting antenna.
How to do a MF / HF radio test?
To make the test box transmit the custom-made call, select Send custom DSC on the test box and press OK. Then, select TFC or MF/HF respectively. With TFC, select frequency and press OK. Select Normal or Reduced output power. Usually, Normal is recommended to send the call. With MF/HF, select frequency and press OK.
What do you need to know about MF / HF equipment?
MF/HF equipment is for sending distress alerts over long range. We need to test MF/HF equipement to be sure of its functionality. Lets see what all test we need to do on MF/HF equipment. I will show this on JRC equipment MCU-331F. If you have worked on this system, it has a remote mode and local mode.
What should the AF signal be for a DSc test?
The AF signal used for calculation of the MARK/SPACE frequencies must be within 1615 +/-15 Hz and 1785 +/-15 Hz respectively to be accepted. In the Send DSC mode, the test box will transmit a DSC call for you to check on the DSC receiver accordingly.