PTT Push to Talk Jack, Features | Vertex Standard FT-1000MP instruction

OTHER DIGITAL/RECORDING DEVICE

INTERFACING

AF OUT JACK

This is a 3.5 mm miniature stereo phone jack which provides constant-level (100 mV @ 600 Ω) for con- nection to a WeatherFax decoder, tape recorder, or other accessory. The audio output level is not affected by the setting of the front panel AF GAIN & SUB AF controls, so you can turn the volume down, if you like, without affecting the audio level being presented to your decoding device. The tip connection of this jack is Main receiver audio, while the ring connection is Sub receiver audio.

The connections to the AF OUT jack are at the same level as the connection to Pin 4 of the PACKET jack. However, the two output ports use independent output buffer amplifiers, so you can freely connect and dis- connect devices to/from these ports without concern over the impedances and levels.

PTT (PUSH TO TALK) JACK

This RCA jack is wired in parallel with the front panel’s MIC jack, providing a handy connection point for a footswitch for voice operation, allowing hands- free PTT operation.

PATCH JACK

For transmit audio input for SSTV (Slow-Scan Tele- vision) operation, you may connect the SSTV terminal’s TX AUDIO line to the PATCH jack. You will need to dis- connect the microphone, however, during transmission, as the PATCH jack is connected in a “Y” configuration along with the microphone input (from pin 8 of the MIC jack).

ACCESSORY INSTALLATION

CW KEY/PADDLE AND COMPUTER KEYING INTERFACE SUGGESTIONS

FEATURES

The MARK-VFT-1000MPincludes a host of fea- tures for the CW operator, the functions of which will be detailed in the “Operation” section later. Besides the built-in Electronic Keyer, two key jacks are provided, one each on the front and rear panels, for convenient connection to keying devices.

Both KEY jacks on the MARK-VFT-1000MPutilize “positive” keying voltage. Key-up voltage is approxi- mately +5V DC, and key-down current is approximately

0.5mA. When connecting a key or other device to the KEY jacks, use only a 3-pin (“stereo”) ¼” phone plug; a 2-pin plug will place a short between the ring and (grounded) shaft of the plug, resulting in a constant “key-down” condition in some circumstances.

CONFIGURATION SUGGESTIONS

1.For everyday operation using the internal electronic memory keyer, connect your paddle to the front panel KEY jack, and activate the front panel [KEY] switch. If you wish to keep the keyer paddle’s cable out of the way, connect the plug, instead, to the rear panel KEY jack.

2.If two operators are using the MARK-VFT-1000MPsimultaneously (for a contest, Field Day, etc.), a second keyer paddle may be connected to the rear panel KEY jack. With the front panel [KEYER] switch pressed in, both operators’ paddles will have access to the internal keyer.

3.If two operators are using the MARK-VFT-1000MPsimultaneously, but both wish to use a straight key, outboard electronic keyer, or computer-driven key- ing cables, the key plugs may be inserted into the front and rear panel KEY jacks; now turn the front panel’s [KEYER] switch off.

MARK-V FT-1000MP Operating Manual

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