Vertex Standard FT-1000MP Transmitting, Antenna Selection, Band TX Range, Selecting Antennas

OPERATION

TRANSMITTING

The transmitter can be activated within the 500-kHz

segment of any of the HF amateur bands, and from 28 to 30 MHz. When tuned to any other frequency, “GEN”

Antenna Selection

is displayed at the left side of the display, and the trans- mitter is disabled. However, you are responsible to re- strict your transmissions to those frequencies on which you are authorized to operate, per the terms of your amateur license. You should also restrict transmissions to the frequencies for which your antenna is designed.

Band	TX Range
160 Meters	1.50000 ~ 1.99999 MHz
80 Meters	3.50000 ~ 3.99999 MHz
40 Meters	7.00000 ~ 7.49999 MHz
30 Meters	10.00000 ~ 10.49999 MHz
20 Meters	14.00000 ~ 14.49999 MHz
17 Meters	18.00000 ~ 18.49999 MHz
15 Meters	21.00000 ~ 21.49999 MHz
12 Meters	24.50000 ~ 24.99999 MHz
10 Meters	28.00000 ~ 29.99999 MHz

Attempting to transmit outside of an amateur band segment will cause the red “TRANSMIT” indicator to the right of the meter to blink. The transmitter is also temporarily inhibited when stopping memory scanning (described later), as pressing the PTT switch while scanning just causes the scanner to stop.

Whenever the transmitter is activated, the MARK-VFT-1000MPautomatically detects any reflected power that might appear at the main antenna jack (as a result of an impedance mismatch), and disables the transmit- ter if too much reflected power is found (in which case the red “HI SWR” indicator at the right side of the display will be lit). Although this protection system should pre- vent any damage to the transceiver, we still recommend that you never activate the transmitter without having a proper antenna connected to the main ANT jack.

SELECTING ANTENNAS

You can select between two rear-panel antenna connectors for transceive operation via the front panel, perhaps eliminating the need to utilize an external co- axial switch.

Press the A/B button to select the rear-panel jack you wish to use. The an- tenna connected to this jack is used for receive (and always for transmit). If a separate receive- only antenna is connected to the “RCA” jack labeled RX IN, and the front panel’s RX switch is pressed, the antenna connected to the RX IN jack will be used by the receiver. A relay engages during transmit, and the last-selected antenna (A or B) will be used for trans- mit. Refer to the diagram at the top of the next column.

Antenna selections are automatically copied along with other operating parameters during memory pro- gramming (covered later), and will take effect when memories are recalled later. However, if you do not want this data stored, you can select regular opera- tion, or else disable ANT switch operation. When dis- abled, antenna selection remains fixed on jack A. Re- call menu selection 8-5to configure the ANT switch func- tion as desired.

AUTOMATIC ANTENNA MATCHING

The built-in automatic antenna tuner unit is capable of matching antenna with impedances from 20~150 Ohms, which corresponds to a maximum SWR of ap- proximately 3.0:1. If the antenna you are using exceeds this SWR as configured, it must be adjusted (mechani- cally or electrically) until a feedpoint impedance closer to 50 Ohms can be obtained.

The MARK-VFT-1000MPprovides 39 tuner memo- ries, which store the exact positions of the tuning ca- pacitors and corresponding inductance values, for out- standing operating convenience.

When you use the tuner the first time on an an- tenna, set the RF PWR control to around the 9 o’clock position, to minimize interference you might cause oth- ers, and also to minimize stress on the tuner, feedline, and antenna (in case there is a high SWR). Ensure beforehand that the frequency you will transmit on is clear of other signals. Also, if you want to monitor the tuner’s action visually, set the meter IC/SWR selector to display “SWR.”

When the channel is clear, press the TUNER but- ton momentarily. The “TUNER” indicator comes on, indicating the ATU is activated, and the “WAIT” indica- tor next to it appears while the tuner seeks the proper matching settings (and, if monitoring SWR on the meter, you should see the tuner select the lowest pos- sible reading). When the “WAIT” indicator turns off, you are ready to transmit (so long as the “HI SWR” indica- tor didn’t light).

Pressing and holding in the [TUNER] button is the action which causes ATU settings to be stored into memory.

MARK-V FT-1000MP Operating Manual page 51