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FCC ID: K6620285X20
IC ID: 511B-20285X20
VX-3R Operating Manual
Changing the Receiving Mode
The VX-3R provides for automatic mode changing when the radio is tuned to different operating
frequencies. However, should an unusual receiving situation arise in which you need to change to other
receiving mode, just press the [MODE] key. The receiving modes available are:
AUTO:
Automatic mode setting per default values for the selected frequency range.
FM: Narrow-bandwidth FM (used for voice communication)
W-FM: Wide-bandwidth FM (used for high-fidelity broadcasting)
AM: Amplitude Modulation
R.F. Says: Unless you have a compelling reason to do so, leave the Automatic Mode Selection feature on
so as to save time and trouble when changing bands. If you make a mode change for a particular channel
or station, you can always store that one channel into memory, as the mode setting will be memorized
along with the frequency information.
S-meter Squelch
A special S-meter Squelch feature is provided on this radio. This feature allows you to set the squelch so
that only signals exceeding a certain S-meter level will open the squelch.
To set up the S-meter squelch circuit for operation, use the following procedure:
1. Press and hold in the [TXPO] key for one second to enter the Set mode.
2. Rotate the DIAL knob to select Set Mode Item 80: SQSMTR.
Note: Do not forget to pull the DIAL knob to rotate the DIAL knob.
3. Press the [TXPO] key momentarily to enable adjustment of this Item.
4. Rotate the DIAL knob to select the desired signal strength level for the squelch threshold (LVL 1 - LVL8
or OFF).
5. Press the PTT switch to save the new setting and return to normal operation.
R.F. Says: 1) When the S-meter squelch is activated, blink the S-meter segment corresponding with the
squelch threshold which set by step 4 above.
2) The receiver’s squelch will open based on the higher of the levels set by the two squelch systems (Noise
Squelch and S-meter Squelch).
For example:
a) If the Noise Squelch (SQL control) is set so that signals at a level of “S-3” will open the squelch, but the
S-meter Squelch (Set Mode Item 80) is set to “LVL 5,” the squelch will only open on signals which are “S5”
or stronger on the S-meter.
b) If the S-meter Squelch is set to “S3,” but the Noise Squelch is set to a high level which will only pass
signals which are Full Scale on the S-meter, the squelch will only open on signals which are Full Scale on
the S-meter. In this case, the Noise Squelch overrides the action of the S-meter Squelch.
Vertex Standard Co., Ltd.
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