Vertex Standard FT-1000MP manual FM Repeater Operation, FM Transmission

OPERATION

TRANSMITTING

FM TRANSMISSION

A separate, dedicated “29 MHz” band is provided on the MARK-VFT-1000MP, allowing you to operate both on 28 MHz in narrow-band modes, and above 29 MHz using narrow-band FM. This relieves you of the need to change all your configurations when switching voice modes.

For transmission, the only control on the front panel you need be concerned about is RF PWR. Microphone gain for FM is set via the separate FM MIC control in the top access panel, and normally needs no adjust- ment after leaving the factory. If you receive signals reports of low audio with a strong carrier, you may want to increase the gain. If you notice distortion in the trans- mit monitor, you may want to decrease it. Otherwise, we suggest leaving it alone. Remember that the ap- parent modulation level on 29 MHz will be less than you are accustomed to on VHF, due to international regulations restricting the maximum deviation to ±2.5 kHz.

All you need to do for most operation is set the METER selector to the “PO” position, and adjust the RF PWR control for the desired output while transmit- ting. If you need full power, keep your transmissions to three minutes or less, with the same time for recep- tion. Otherwise, set the power output to 100 Watts or less, and you should never encounter any duty cycle limitations.

You can use the VOX circuit for t/r switching, if de- sired, and the transmit monitor to listen to your signal. See also the FM Repeater Operation at the right.

FM Repeater Operation

Several features are available for operation on FM repeaters above 29 MHz, which typically use 100-kHz splits.

To locate these repeaters, you can ask around the calling channel (29.6 MHz), or you may want to load a block of memory channels (see page 67) with 50-kHz frequency multiples from 29.61 to 29.7 MHz (and FM mode, of course). Then set the squelch so that the receiver is silent on a clear channel, and hold the mi- crophone UP/DWN keys to scan the memories.

Repeater Shift - When you find a repeater, press the [RPT] button, once for “–” shift (to transmit 100 kHz below your receiving frequency). Pressing it again will select “+” shift, but this is not used above 29.6 MHz. Press it once more to re- turn to simplex. Try a quick identification transmission to make sure you have the shift right.

Repeater TX Offset - For repeaters not using the standard 100 kHz offfset, you can change the default offset between 0 ~ 200 kHz via menu selection 6-9.

CTCSS Tone - A low-level 88.5-Hz subaudible tone is transmitted to access closed repeaters. Should a different CTCSS tone be required, you can choose any one of 33 standard tones via menu selection 6-7.

Tone Type – Continuous (CTCSS) or burst tone transmission is enabled from menu selection 6-8.

CTCSS TONE FREQUENCIES

67.0	Hz	118.8 Hz	173.8 Hz
71.9	Hz	123.0 Hz	179.9 Hz
77.0	Hz	127.3 Hz	186.2 Hz
82.5	Hz	131.8 Hz	192.8 Hz
88.5	Hz	136.5 Hz	203.5 Hz
94.8	Hz	141.3 Hz	210.7 Hz
100.0 Hz		146.2 Hz	218.1 Hz
103.5 Hz		151.4 Hz	225.7 Hz
107.2 Hz		156.7 Hz	233.6 Hz
110.9	Hz	162.2 Hz	241.8 Hz
114.8	Hz	167.9 Hz	250.3 Hz

MARK-V FT-1000MP Operating Manual page 59