PRAXSYM DB-12 User Manual

CW Transmitter

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User’s Manual

Warranty Statement

PRAXSYM warrants that all items will be free from defects in material
and workmanship under use as specified in this guide for a period of
one year from date of delivery. PRAXSYM further agrees to repair or
replace, at its discretion, any failure which upon PRAXSYM's
inspection appears to be a result of workmanship or material defect.
In no case, shall PRAXSYM's liability for breach of warranty exceed
the purchase price of the items in question. PRAXSYM's liability on
any claim of any kind, for any loss connected with, or resulting from
the use of, performance or breach thereof, installation, inspection,
operation or use of any equipment furnished by PRAXSYM, shall in
no case exceed the purchase price of the goods which give rise to the
claim.

Praxsym, Inc.

120 S. Third Street

Fisher, IL 61843

Phone [phone]

Fax [phone]
[e-mail]
www.praxsym.com

Table of Contents

1.0 Introduction

1.1 Overview

The Praxsym CW Transmitter is a portable continuous wave test
source capable of transmitting test signals on two channels
simultaneously. The output from each channel can be enabled
independently. The output level can be adjusted between -10 dBm
and +12 dBm, in 0.1 dB steps.

Each channel contains four
up to four saved output configurations (frequency, amplitude, and
channel spacing) per channel. The transmitter also contains

which cycles through the

Mode

The transmitter frequency and output level for each channel can be
set from the touch keys on the front panel or from the touchscreen
display. The transmitter status can easily be monitored from the
backlit LCD display. The transmitter also contains a USB interface
enabling the user to control the transmitter remotely.

The transmitter can be powered using the internal 6 AA
rechargeable batteries for 6 hours of continuous operation or from
the AC/DC wall adapter included.

Setups. Setups

Setups

1.2 Functional Description

The transmitter will power on to a splash screen with the Praxsym
Logo, and immediately proceed to the main operation screen. The
previous settings from the last use will be retained. The transmitter
will not power on transmitting RF energy, though it may have been
powered off previously while transmitting. The transmitter may
safely be powered off in any state using the ON/OFF button.

The transmitter is configured with channel spacing of many common
wireless standards. Once the channel spacing is selected within the
Channel Setup menu, the step size may be adjusted from the main
operation screen. This function makes stepping across multiple
channels quick and easy during testing.

allow the user to program

Scan

at an adjustable scan rate.

1.3 Items Supplied

A

E

D

B

Item Description

A CW Transmitter

With 6 Internal NiMH AA Batteries

B 12V 1.5A AC/DC Supply

C Power Cord

D USB Cable

E Flash Drive, Users Manual, Driver Software

C

1.4 Looking at the Transmitter

G

C

D

E

F

A

B

Item Description

A Channel 1 Output, N-Type Connector

B Channel 2 Output, N-Type Connector

C Battery Charger Status LED

D Battery Charge Jack

E USB Port

F LCD Touchscreen Display

G Front Panel, Touch Keys

2.0 Operation

2.1 Battery Charging

The transmitter is fully operational while the batteries are being
charged. Charging can occur whether or not the unit is powered on.

When “batt low” appears in the battery icon, the battery life is nearing
its end. The transmitter will shut down soon. Connect the AC/DC
adapter (12 V /1.5 A) to the unit’s CHARGE jack. Plug the adapter into
a wall outlet. An internal battery charger will control and terminate
the charging of the 6 NiMH cells within each unit. When beginning a
charge cycle with batteries which have been completely depleted,
allow about two and a half hours for a full charge to be restored. A
top-off charge is recommended immediately before use for maximum
battery life.

A flashing red LED indicates a precharge state. Usually it will flash
for a few moments and then enter a fast charge state, indicated by a
solid red LED. The precharge state may last up to a few hours with
drained batteries and indefinitely if one or more cells have failed. All
cells must be replaced in the latter case. When the LED turns green,
the batteries are fully charged and enter trickle charge mode
indefinitely. Fully charged batteries will give six to eight hours of use.
Also, the battery icon on the display will be completely darkened. If
the AC/DC adapter is left connected to the transmitter, the charger
will initiate a new charge cycle once the batteries have discharged.
This will occur continually. Unless the transmitter is in operation, it is
not recommended to leave the AC/DC adapter connected for more
than 24 hours.

Though designed for many recharge cycles, the batteries are user
replaceable. Replace the batteries every 2-3 years. Use only
Energizer® NH15 AA NiMH rechargeable batteries, as supplied
originally. The internal charge circuit will only work with NiMH
rechargeable batteries. Attempting to charge other AA battery types
such as Alkaline or Lithium Ion will result in damage to the
transmitter.

Do not store the transmitter with discharged or failed batteries.
Discharged NiMH batteries can leak acid causing damage to the
transmitter.

2.2 Using Channel Setups

Each channel, 1 and 2, contain four
program up to four saved output configurations (frequency,
amplitude, and channel spacing) per channel. The
accessed by repeatedly touching the tabs on the left side of the
display, depressing the 1 or 2 number keys, or by choosing

Setup

or

Channel 2 Setup

When selecting the desired

SEL (Select)

size. The arrow keys change the values of the selected option. On
applicable transmitter models, touching the listed frequency band
allows for selection of a new band. These same changes can be made
from the

Main Menu

Touching
enable and disable the RF output for the selected

button toggles between frequency, amplitude, and step

Channel 1 Setup

.

RF ON/OFF

from the main menu.

Setup

or

or depressing the 0 key on the keypad will

Setups. Setups

from the home screen, pressing the

Channel 2 Setup

allow the user to

Setups

can be

Channel 1

menu options in the

Setup

.

Continuing to
touch the
channel tabs
will cycle
through the

Setups.

Setups

for
channel 1 can
also be changed
through the

Channel 1 Setup

Menu, likewise
for channel 2.