VX-520U
UHF Hand-Held Portable
Land Mobile Transceiver
OPERATING MANUAL
VERTEX STANDARD CO., LTD.
4-8-8 Nakameguro, Meguro-Ku, Tokyo 153-8644, Japan
VERTEX STANDARD
US Headquarters
17210 Edwards Rd., Cerritos, CA 90703, U.S.A.
International Division
8350 N.W. 52nd Terrace, Suite 201, Miami, FL 33166, U.S.A.
YAESU EUROPE B.V.
P.O. Box 75525, 1118 ZN Schiphol, The Netherlands
YAESU UK LTD.
Unit 12, Sun Valley Business Park, Winnall Close
Winchester, Hampshire, SO23 0LB, U.K.
YAESU GERMANY GmbH
Am Kronberger Hang 2, D-65824 Schwalbach, Germany
VERTEX STANDARD HK LTD.
Unit 5, 20/F., Seaview Centre, 139-141 Hoi Bun Road,
Kwun Tong, Kowloon, Hong Kong
Congratulations!
You now have at your fingertips a valuable communications tool - a
VERTEX STANDARD two-way radio! Rugged, reliable and easy to
use, your VERTEX STANDARD radio will keep you in constant touch
with your colleagues for years to come, with negligible maintenance
down time.
Please take a few minutes to read this manual carefully. The informa-
tion presented here will allow you to derive maximum performance from
your radio. After reading it, keep the manual handy for quick reference,
in case questions arise later on.
We’re glad you joined the VERTEX STANDARD team. Call on us any
time, because our business is communications. Let us help you get your
message across.
IMPORTANT NOTICE!
The following device operating configurations must be satisfied:
This radio is restricted to occupational use, work related operations
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only where the radio operator must have the knowledge to control its
RF exposure conditions.
The radio must be used with a maximum operating duty cycle not
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exceeding 50%, in typical Push-to-Talk configurations.
When transmitting, hold the radio in a vertical position with its mi-
r
crophone 1 to 2 inches (2.5 to 5 cm) away from your mouth and keep
the antenna at least 1 inch (2.5 cm) away from your head and body.
Notice
There are no user-serviceable points inside this transceiver. All service
jobs must be referred to your Authorized Service Center or Network
Administrator.
VX-520U OPERATING MANUAL
VX-520U
UHF Hand-Held Portable
Land Mobile Transceiver
The VX-520U is a frequency-synthesized,
microprocessor-controlled FM hand-held
portable transceiver providing up to five
watts of power output on up to 32 channels
in the UHF Land Mobile Band. Designed spe-
cifically for commercial and professional ap-
plications, the VX-520U is housed in high-
strength die-cast aluminum alloy, sealed to
MIL-810 C, D & E intrinsically safe (I/S)
and weather-tight specifications.
User selectable features include a four-mode
display with channel name or number, up-
right or inverted for easy viewing when on
your belt; selective channel scanning, adjust-
able-pause priority scanning, and variable
transmitter power output.
Other user-selectable features include push-
button display illumination, 2-tone decoder
enable/disable (with optional F2D-5 Unit
installed), and manual squelch override. The
VX-520U is easily programmed by your
dealer using a Vertex Standard Service Kit
with an IBM PC-compatible computer.
Please read this manual carefully to become
familiar with the features of the VX-520U.
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VX-520U OPERATING MANUAL
CONTROLS & CONNECTORS
Top panel
VOL Control
À
This control adjusts the volume of the receiver, and turns the radio off
when rotated fully counterclockwise to the click-stop
S/DW Button (Scan/Dual Watch)
Á
Pressing and holding this button more than 2 seconds (but less than 4
seconds) turns the channel scanner on and off. Pressing and holding this
button more than 4 seconds activates the Dual Watch feature (explained
later).
DISP Button
Â
Pressing and holding this button more than 2 seconds (but less than 4
seconds) activates functions as programmed by your dealer and determined
by your system requirements (See “PRE-PROGRAMMED FUNCTIONS”, page
13). Pressing and holding this button more than 4 seconds inverts the
LCD display to either frontward or backward facing readout (the back-
ward display is convenient for viewing when wearing the transceiver on
your belt).
A/B Toggle Switch
Ã
The 32 available channels in the VX-520U can be organized into 2 groups
with up to 16 channels in each. Toggle this switch to select a group “A” or
“B” for operation.
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VX-520U OPERATING MANUAL
CONTROLS & CONNECTORS
BUSY/TX Indicator
Ä
This lamp blinks green when a signal is being received (or the squelch is
opened by pressing the MON RES button) and red when transmitting. To
avoid interference, do not transmit if the lamp is glowing green. When the
battery almost depleted, this lamp blinks red, indicating that the battery
needs recharging or replacement very soon.
CH Rotary Selector
Å
This rotary switch selects the operating channel. If a channel is selected
that is not available for operation, “----” is displayed, accompanied by a
rapid warning beeper (2 beeps/sec.).
Antenna Jack
Æ
This threaded-type jack accepts the supplied flexible antenna. Any other
antenna types used here must be designed for the programmed operating
frequencies.
Liquid Crystal Display
Ç
In addition the channel number name, the display includes some operating
status symbols, indicated in the diagram below.
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VX-520U OPERATING MANUAL
CONTROLS & CONNECTORS
Side Panel Buttons
MON RES (Monitor/Reset) Button
À
Pressing and holding this button more than 2 seconds (but less than 4
seconds) disables the tone squelch, and permits monitoring of stations
transmitting on the selected channel while still keeping your receiver quiet
from noise (“MO” will appear at the top right of the LCD). Press it again
to only hear calls within your network.
Pressing and holding this button more than 4 seconds toggles the tone and
noise squelch override, allowing all stations (and noise) on the channel to
be heard. This may be used to hear weak stations whose signals would not
normally open the squelch. Do this to pre-adjust the VOLume control
before receiving calls.
(With Selective Calling Option)
When the two-tone sequential decoder unit (F2D-5) is installed, and a
selective call has been received (“CALL” indicator on), pressing and
holding this button more than 2 seconds (but less than 4 seconds) will
reset the call function on the current channel and silence the receiver,
otherwise pressing and holding this button more than 4 seconds resets the
call function on ALL channels.
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