Évaluations - 4, GPA: 3.8
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Facilité d'utilisation
When in SSB, FM, or AM mode, you can change the filter bandwidth by altering its low cut-off frequency and/or high cut-off frequency. For CW and FSK modes, you can change the filter bandwidth by directly specifying a bandwidth. Changing the filter bandwidth does not affect the current receive frequency. You can also monitor signals trimmed off by the above DSP filters. Consult .PROGRAM FUNCTION BUTTON. {page 49} and assign the DSP Filter Monitor function (No. 53) to any [PF] button. Press and hold the [PF] button to monitor the trimmed signals; the DSP filters will restore the default bandwidths. Release the button to quit the function. You may use this function to check how adjacent frequencies are in use. ¦ SSB/ FM/ AM Modes 1 Select SSB, FM, or AM mode. 2 Turn the DSP SLOPE (LOW) control clockwise to raise the low cut-off frequency, or counterclockwise to lower the low cut-off frequency. USB pass band f USB pass band f Turn the DSP SLOPE (HIGH) control clockwise to raise the high cut-off frequency, or counterclockwise to lower the high cut-off frequency. USB pass band f USB pass band f Adjust Frequency Selections DSP SLOPE (LOW) control 10, 50, 100, 150, 200, 250, 300, 350, 400, 450, 500, 550, 600, 650, 700, 750, 800, 850, 900, 950, 1000 Hz DSP SLOPE (HIGH) control 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 2.0, 2.2, 2.4, 2.6, 2.8, 3.0, 3.2, 3.4, 3.6, 4.0, 4.4, 5.0 kHz The default cut-off frequencies depend on the current positions of the DSP SLOPE controls. 9 REJECTING INTERFERENCE ¦ CW/ FSK Modes 1 Select CW or FSK mode. 2 Press [FILTER]. • The current filter selection appears. 3 Turn the MULTI/CH control clockwise to widen the bandwidth, or counterclockwise to narrow the bandwidth. Interferingsignal Desired signal Interferingsignal 4 Press [FILTER] to complete the setting. Mode Bandwidth Selections (Hz) Default (Hz) C W 3 0 0 ,2 0 0 ,1 5 0 ,1 0 0 ,8 0 ,5 0 , k2 . 0k ,1 . 06 0 0 ,5 0 0 ,4 0 0 , 6 0 0 F S K k1 . 5k ,1 . 05 0 0 ,2 5 0 , k1 . 5 Depending on which bandwidth you select for the DSP filter and which type of optional filter you install, the wide IF filter or the narrow IF filter will automatically be selected. Optional Filter Mode DSP Filter Bandwidth IF Filter Bandwidth C W k H z2 . 0 W di e 1-8 8 S N-Y K S S B k H z )( 1 . 8 l o w e ro rk H z1 . 0 N a rr o w F S K k H z1 . 5 W di e H z ,5 0 0H z ,2 5 0 k H z1 . 0 N a rr o w 1-8 8 C-Y K C W H z )( 5 0 0 C W k H z2 . 0k H z ,1 . 0 W di e l o w e ro rH z6 0 0 N a rr o w F S K k H z1 . 5k H z ,1 . 0 W di e H z5 0 0H z ,2 5 0 N a rr o w 1-8 8 C N-Y K C W H z )( 2 7 0 C W gih h e ro rH z3 0 0 W di e H z ,1 0 0H z ,5 0 H z2 0 0 N a rr o w BEAT CANCEL Beat Cancel uses an adaptive filter and attenuates more than one cyclic interference within the receive pass band. The adaptive filter changes its characteristics according to the nature of the signal being received at a given moment. You can use Beat Cancel when in SSB, FM, or AM mode. Receive pass band Interfering tones Desired signal Before After Press [B.C.] to toggle Beat Cancel ON or OFF. • .BEAT CANCEL. appears when the function is ON. Note: While receiving intermittent CW signals, the transceiver sounds clicks. This does not indicate a malfunction. If attenuation is not satisfactory, press [B.C.] for 1 second or longer to enhance the attenuation effect; a beep sounds, but no change occurs on the display. Pressing [B.C.] for 1 second or longer again restores the original attenuation level. Note: . The Enhanced Beat Cancel setting is cleared when the power to the transceiver is turned OFF. . Enhanced Beat Cancel may adversely affect desired signals slightly because of its stronger effect. NOISE REDUCTION This transceiver provides two types of Noise Reduction functions, 1 and 2, for reducing random noise which interferes with the desired signal. Just trying them both is the easiest way to judge which function works more effectively under the current condition. Normally select Noise Reduction 1 in SSB mode and select Noise Reduction 2 in CW mode. Note: Using Noise Reduction 2 in SSB mode may lower the clarity of signals or induce pulse noise depending on conditions. Press [N.R.] to toggle between Noise Reduction 1, Noise Reduction 2, and OFF. • .N. R. 1. or .N.R. 2. appears depending on which function is selected. Note: A different selection can be made between two groups of modes; one group includes SSB, FM, and AM, and the other group includes CW and FSK. So you need not change the selection each time you switch modes between the two groups. ¦ Changing NR1 Performance Use Menu No. 51 to change the effect of Noise Reduction 1. Switch Noise Reduction 1 ON, then select level 1 to 9 in this menu while receiving signals. The default is .Auto.; this selection provides an optimum effect according to the strength of the received signal. Note: . Using a high NR1 level and Beat Cancel simultaneously may cause noise to stand out; this does not indicate a malfunction. . When changing the NR1 level in the m...
Ce manuel est également adapté pour les modèles :Radio - TS-570D (3.61 mb)