Drake Sw8 World Band Shortwave Receiver Manual

							Glossary of Terms     25
1)  AC Input - Alternating Current power source
available at wall outlet sockets.
2)  AM - Signals in which the information is conveyed
by amplitude changes of the signal.  Amplitude Modula-
tion is used for the AM broadcast bands.
3) AGC - Automatic Gain Control which is employed in
receivers to adjust the amount of gain in the receivers
circuitry to prevent distortion and maintain a nearly
constant audio volume level over wide variations in
received signal strength.
4)  Attenuation - Loss, as applied in the text of this
manual, added prior to the input stages of the receiver
to reduce the level of very strong signals that may
occur on certain bands, in certain locations, at certain
times or a combination of all three factors.  Each 10 dB
(decibel) step reduces the power of the received signal
by a factor of ten.
5)  CW - Continuous Wave transmission signals.
Actually, the signal is keyed on and off at precise
intervals to convey information.  Morse code is the
most common CW signal.
6)  DC Input - Direct Current power source such as is
available from batteries or regulated power supplies.
7)  Dynamic Range - Ability of the receiver to faithfully
reproduce high quality audio over a wide range of
signal strength conditions - from very weak signals to
very strong signals.
8)  Frequency - Rate of reoccurrence in hertz or
cycles/second of electromagnetic wave or carrier.
9)  FM - Signals in which the information is conveyed
by frequency changes of the signal.  Frequency Modula-
tion is used for the FM broadcast bands.
10)  Electronically Switched Filter - A multi bandwidth
filter with high adjacent channel attenuation switched
electronically.
11)  GMT - Greenwich Mean Time.12)  HF - High Frequency band extends from approxi-
mately 1.5 MHz to 30 MHz.
13)  LCD - Liquid-Crystal Display - Low power
consumption displays used for wristwatches and
information displays on many types of electronic
equipment.
14)  LSB - Lower Side Band - The lower frequency
portion, excluding the carrier, of an AM signal.  A
single-sideband signal, in this case the lower sideband,
contains all of the modulation information of amplitude
modulation in one half the bandwidth.
15)  RF - Radio frequency
16) RTTY - Radio Teletype communications.
17)  Squelch - A user controlled adjustment which
mutes the audio output below a certain signal strength.
18) Synchronous Detector - An amplitude modulation
detector which utilizes a replica of the original trans-
mitted carrier signal to improve the reception of weak
signals.
19)  Synthesized - Capable of generating a large
number of different output frequencies, all related to a
single, highly stable reference source.
20)  Up Conversion - A frequency conversion tech-
nique that translates an incoming RF signal to a higher
frequency.
21)  USB - Upper Side Band - The higher frequency
portion, excluding the carrier of an AM signal.  A single-
sideband signal, in this case the upper sideband,
contains all of the modulation information of amplitude
modulation in one half the bandwidth. .
22)  UTC - Universal Time Coordinated.
23)  VFO - Variable Frequency Oscillator
24)  VHF - Very High Frequency band extends from
approximately 30MHz to 300 MHz. 
						

							26     Troubleshooting
PROBLEM
Front panel clock display is showing
but radio will not turn on
No front panel display or lights
No signals heard when antenna is
connected or sensitivity is low
S meter indication but no sound heard
No front panel operation such as
tuning, frequency entry etc.
Timer does not operatePROBABLE CAUSE
A) Rear panel MASTER POWER
switch
A) Power connection
B) Defective AC adaptor unit
C) Batteries are discharged or not
installed for portable operation, no
AC power
A) Incorrect antenna input selected
B) RF              enabled
A) Improper mode selected
B) External speaker connected but
defective
A) Lock enabled
A) Clock(s) not set
B) Timer not properly set
C) Alternate clock selectedSOLUTION
A) Check MASTER POWER switch
on rear panel and set to ON position
A) Check power supply cables
B) Check AC ADAPTOR
C) Check/install batteries for portable
operation
A) Select correct antenna input
B) Turn off RF
A) Check mode selection
B) Check external speaker
A) Press F and hold for 3 seconds to
unlock front panel
A) Set clock(s)
B) Set clock(s) program timer ON/
OFF times
C) Check that last displayed clock is
the desired one for timer event
ATTATT 
						

							Warranty     27
SERVICE INFORMATION
You may contact R. L. DRAKE Service Department for
additional information or assistance by calling
(513) 746-6990, Monday through Friday, 8:00 A.M. -
5:00 P.M. EST, except on holidays.
You may also contact the R. L. DRAKE Service Depart-
ment by E-mail at the following address:
[email protected]
or by Telefax:
+1 (513) 743-4576.Should you want to return your unit for service,
package the receiver carefully using the original carton
or other suitable container.
Write your return address clearly on the shipping
carton and on an enclosed cover letter describing the
service required, symptoms or problems.  Also include
your daytime telephone number and a copy of your
proof of purchase.
The receiver will be serviced under the terms of the  R.
L. Drake Company Limited Warranty and returned to
you.
ONE YEAR LIMITED WARRANTY
R. L. DRAKE COMPANY warrants to the original
purchaser this product shall be free from defects in
material or workmanship for one year from the date of
original purchase.
During the warranty period the R. L. DRAKE COM-
PANY or an authorized Drake service facility will
provide, free of charge, both parts and labor necessary
to correct defects in material and workmanship.  At its
option, R. L. Drake Company may replace a defective
unit.
To obtain such warranty service, the original purchaser
must:
(1) Complete and send in the Warranty Registration
Card within ten (10) days of purchase.
(2) Notify the R. L. DRAKE COMPANY or the nearest
authorized service facility, as soon as possible after
discovery of a possible defect, of:
(a) the model and serial number.
(b) the identity of the seller and the approximate date
of purchase.
(c) a detailed description of the problem, including
details on the electrical connection to associated
equipment and the list of such equipment.
(3) Deliver the product to the R. L. DRAKE COM-
PANY or the nearest authorized service facility, or ship
the same in its original container or equivalent, fully
insured and shipping charges prepaid.
Correct maintenance, repair, and use are important to
obtain proper performance from this product.  There-
fore carefully read the Instruction Manual.  This
warranty does not apply to any defect that R. L.
DRAKE COMPANY determines is due to:(1) Improper maintenance or repair, including the
installation of parts or accessories that do not conform
to the quality and specification of the original parts.
(2) Misuse, abuse, neglect or improper installation.
(3) Accidental or intentional damage.
All implied warranties, if any, including warranties of
merchantability and fitness for a particular purpose,
terminate one (1) year from the date of the original
purchase.
The foregoing constitutes R. L. DRAKE COMPANY’S
entire obligation with respect to this product, and the
original purchaser shall have no other remedy and no
claim for incidental or consequential damages, losses or
expenses.  Some states do not allow limitations on how
long an implied warranty lasts or do not allow the
exclusions or limitation of incidental or consequential
damages, so the above limitation and exclusion may not
apply to you.
This warranty gives you specific legal rights and you
may also have other rights which vary from state to
state.
This warranty shall be construed under the laws of
Ohio. 
						

							®
R. L. Drake Company
230 Industrial Drive
Franklin, Ohio 45005 U.S.A
CUSTOMER SERVICE AND PARTS TELEPHONE:  +1 (513) 746-6990
 TELEFAX:  +1 (513) 743-4576
WORLD WIDE WEB SITE: http://www.rldrake.com