Vertex Standard FT-1000MP manual Accessory Installation, Linear Amplifier Interfacing, Qsk

ACCESSORY INSTALLATION

LINEAR AMPLIFIER INTERFACING

The MARK-VFT-1000MPcan be used with the optional Yaesu FL-7000or VL-1000Linear Amplifier, providing automatic band switching via digital band data output from the BAND DATA jack on the rear panel of the transceiver. Most other amplifiers can be adapted to operate with the MARK-VFT-1000MP; however, the main points to be concerned with are the switching re- quirements of the amplifier, and if QSK (full break-in) operation is desired. The linear amplifier Tx/Rx switch- ing capability of the MARK-VFT-1000MPis described in the table below.

	Operation
Parameter	QSK	Non-QSK
	Relay Disabled	Relay Enabled
DC Switching	< 40VDC	< 60 VDC
Voltage
DC Swiching	< 150 mA	< 200 mA
Current
AC Switching	–	< 100 VAC
Voltage
AC Swiching	–	< 500 mA
Current

OPERATION WITH QSK AMPLIFIERS

Connect the RF output from the transceiver ANT jack (A or B) to the RF input jack of the linear. Connect the ALC output from the linear to the EXT ALC jack on the rear of the transceiver (see the “About ALC” dis- cussion below). After making the RF and Tx/Rx switch- ing connections described below, you may need to adjust the ALC output level of the linear so that it is not overdriven by the MARK-VFT-1000MP. Your linear’s manual should describe how to do this.

If using a VL-1000, connect the BAND DATA Cable (supplied with the VL-1000) from the transceiver BAND DATA jack to the amplifier BAND-DATA 1 jack; this will provide automatic band selection for the linear, as well as QSK Tx/Rx switching control. You may also con- nect a user-constructed control cable (refer to VL-1000manual for details) from the transceiver REMOTE jack to the amplifier BAND-DATA 2 jack to provide auto- matic amplifier tune-up for the linear using the MARK-

VFT-1000MP. Press the VL-1000’s front panel ATT switch to activate the 3 dB input RF power attenuator, to pad the 200 Watt (maximum) input power from the MARK-VFT-1000MP.

MARK-V FT-1000MP Operating Manual page 11