FCC ID: K6620223X20
IC ID: 511B-20223X20
VX-120/170 O
PERATING MANUAL
9/64
Vertex Standard Co., Ltd.
Operation
R. F. says:
Hi! I’m R. F. Radio, and I’ll be helping you along as you learn the many features of
the VX-120/170. I know you’re anxious to get on the air, but I encourage you to read the
“Operation” section of this manual as thoroughly as possible, so you’ll get the most out of this
fantastic new transceiver. Now. . .let’s get operating!
Switching Power On and Off
Be sure the Battery Pack is installed, and that the battery is fully charged. Connect the
antenna to the top panel ANTENNA jack.
Rotate the top panel’s VOL/PWR knob out of the click-stop to turn on the radio. The
current DC supply voltage will be indicated on the display for 2 seconds. After this 2
second interval, the display will resume its normal indication of the operating frequency.
To turn the radio off, turn the VOL/PWR knob fully counter-clockwise into the click stop
position.
Adjusting the Audio Volume Level and Squelch Setting
At first, set the SQL knob fully counter-clockwise. Now, you may rotate the VOL/PWR
knob to adjust the receiver level for a comfortable listing level, using the background
noise as a reference.
To set the squelch, turn the SQL knob clockwise, slightly past the point where the
background noise is muted. This is the point of best sensitivity to weak signals, and we
recommend that you not rotate the SQL knob very much past the point where the
background noise is just silenced.
R.F. Says:
1) A special “RF 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.
See page ?? for details.
2) If you’re operating in an area of high RF pollution, you may need to consider “Tone
Squelch” operation using the built-in CTCSS Decoder. This feature will keep your radio quiet
until a call is received from a station sending a carrier which contains a matching (subaudible)
CTCSS tone. Or, if your friends have radios equipped with DCS (Digital Coded Squelch) like
your VX-120/170 has, try using that mode for silent monitoring of busy channels.
Frequency Navigation
The VX-120/170 will initially be operating in the “VFO” mode, a channelized system which