Vertex Standard VX-177 manual Changing the TX Deviation Level

MISCELLANEOUS SETTINGS

CHANGING THE TX DEVIATION LEVEL

In many areas of the world, channel congestion has required that operating channels be closely spaced. In such operating environments, it often is required that operators use reduced deviation levels, so as to reduce the potential for interference to users on adjacent channels. The VX-177includes a simple method of accomplishing this:

1. Press the [F] key, then press the [0(SET)] key to enter the Set mode.

2. Rotate the DIAL knob to select Set Mode Item 51: WID.NAR.

3. Press the [F] key momentarily to enable adjustment of this Set Mode Item.

4. Rotate the DIAL knob to set this Set Mode Item to “NARROW.”

In this configuration (HALF DEVIATION active), the transmitter’s deviation will be approximately ±2.5 kHz, and the received audio output level will be increased, for easier listen-

ing on the narrow signal.

5.When you have made your selection, press the PTT switch to save the new setting and exit to normal operation.

The “normal” setting for the deviation (when this Menu Item is set to WIDE) is ±5 kHz.