Évaluations - 4, GPA: 4.3 ( )

Fabricant : Kenwood Taille : 2.05 mb Nom Fichier : Langue d'enseignement:

When used in combination with the noise squelch, CTCSS provides a simple method to selectively choose which stations will be heard. This transceiver offers a total of 38 standardized CTCSS frequencies. Monitoring is less tiring when using CTCSS since you hear only those stations on a particular frequency that are transmitting the CTCSS tone that you have selected. SELECTING CTCSS FREQUENCIES Refer to the chart of frequencies available and the procedure for selecting the desired frequency on page 31. USING CTCSS To switch ON CTCSS, repeatedly press [T/CT] until "CT" appears on the display. Each time [T/CT] is pressed, the display changes as below: t_J No indicator : Subaudible tone not transmitted and tone squelch not functional. T : Subaudible tone transmitted. CT : Subaudible tone-transmitted and tone squelch functional. After switching ON the CTCSS function, the squelch will not open until a signal is received that has the selected CTCSS Tone superimposed on the signal. To disable CTCSS, press [T/CT] again. Note: ► "CT" will appear if [T/CT] is pressed when the TSU-8 CTCSS unit is not installed; however, CTCSS will not function. ► When using DTSS or Page with CTCSS, the squelch opens only if the correct CTCSS tone is received and the received DTSS or Page code matches the code stored in your transceiver. ► TH-22EITH-42E: Selecting the 1750 Hz tone inhibits CTCSS operation. In addition, selecting 1750 Hz switches CTCSS OFF automatically if this function is ON at the time, /is soon as any Tone frequency other than 1750 Hz is selected, the previous CTCSS status (ON or OFF) is restored. 40 DUAL TONE SQUELCH SYSTEM (DTSS) DTSS is available only on transceivers equipped with a DTMF keypad. DTSS provides a more refined method than CTCSS to selectively communicate with specific stations. A total of 1000 3-digit DTMF (Dual Tone Multi-Frequency) codes are available to be used as addresses for stations with which you wish to communicate. These codes can be changed easily and regularly as required. Due to the quantity of different codes, large networks can be set up that use DTSS for selective calling and receiving. By including group codes in the network plan, sub-groups within the network can be contacted without disturbing others monitoring the same frequency. If your needs are simpler, DTSS also serves a useful purpose when you only wish direct communication with a few close friends on your favorite frequency. A good example of this application is at hamventions when a particular frequency can be virtually unusable due to overcrowding, if your group switches ON DTSS, your squelch only opens when a call with your private address or the group address is received. If no signal is received for more than 2 seconds after DTSS has opened the squelch, the squelch then closes. Anytime you wish to monitor all activity on the channel, you simply switch OFF the DTSS function. ACTIVATING DTSS To switch ON the DTSS function, press [F], [2]. • "DT" appears when DTSS is ON. • Each time this key combination is pressed, DTSS toggles ON and OFF. Note: ► When [F], [2] is pressed with Page ON, Page is automatically switched OFF, and DTSS is switched ON. ► Both DTSS status and a DTSS code can be stored in a memory channel or the Call channel. Further, when recalling either a memory channel or the Call channel with DTSS status ON while using the VFO with Page switched ON, Page is given priority and the DTSS status switches OFF. ► The microphone is inhibited while the DTSS code is transmitted. ► It's advisable to turn OFF Battery Saver when you use DTSS. 41 OVERVIEW Page is available only on transceivers equipped with a DTMF keypad. Similar to DTSS, Page uses DTMF codes to address a single station or a group of stations. Page is useful when waiting to receive a call from a specific station. A common group Page code and individual codes should be agreed on in advance. You can select codes from the range 000 to 999 inclusive. Unlike DTSS, Page offers the added benefit of identifying who called you. The calling station’s code appears on the target transceiver’s display. If called with an individual code, the individual caller code appears; if called with a group code, the group code appears. This characteristic of Page helps reduce the activity level on a frequency when operators are temporarily absent from their stations. There is no longer a need for repeated calls when your target station is not listening. On return to his or her operating position, their transceiver display will show your station code. They will know immediately that you called. GE PAGE CODE MEMORY The transceiver has 8 Page code memories in total. A : Stores your station code. 0 : Stores the calling station’s code. The transceiver automatically stores this code while in Receive. You can also use the stored code to respond to the other station. 1 to 6 : Stores group codes or local station codes. STORING PAGE CODES To save th...

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