Eton E1 - Manual (Page 32)

63
TROUBLESHOOTING
E1 MANUAL
62
AC Input - Alternating Current power source available
at wall outlet sockets.
AM - Signals in which the information is conveyed by
amplitude changes of the signal. Amplitude
Modulation is used for the AM broadcast bands.
AGC - Automatic Gain Control which is employed in
receivers to adjust the amount of gain in the receiver's
circuitry to prevent distortion and maintain a nearly
constant audio volume level over wide variations in
received signal strength.
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.
DC Input - Direct Current power source such as is
available from batteries or regulated power supplies.
DX - Refers to stations which are unusually distant
from the receiver and are therefore frequently difficult
to receive. In the context of this manual, DX refers to a
built in preamplifier, which, when enabled, makes
these “DX”stations more readable.
Dynamic Range - Ability of the receiver to faithfully
reproduce high quality audio over a wide range of sig-
nal strength conditions - from very weak signals to
very strong signals.
Frequency - Rate of reoccurrence in hertz or cycles
per second of electromagnetic wave or carrier.
FM - Signals in which the information is conveyed by
frequency changes of the signal. Frequency Modulation
is used for the FM broadcast bands.
Electronically Switched Filter - A multi bandwidth
filter with high adjacent channel attenuationswitched
electronically.
GMT - Greenwich Mean Time.
HF - High Frequency band. This consists of the LW,
MW, and SW bands on the E1 receiver.
GLOSSARY OF TERMS
LCD - Liquid-Crystal Display - Low power consumption
displays used for wristwatches and information dis-
plays on many types of electronic equipment.
LSB - Lower Side Band - The lower frequency portion,
excluding the carrier, of an AM signal. A single-side-
band signal, in this case the lower sideband, contains
all of the modulation information of amplitude modu-
lation in one half the bandwidth.
RF - Radio frequency
RTTY - Radio Teletype communications.
Softkeys - Keys surrounding the display that have dif-
ferent functions under different conditions. The current
function of each individual softkey is shown on the dis-
play.
Squelch - A user controlled adjustment which mutes
the audio output below a certain signal strength.
Synchronous Detector - An amplitude modulation
detector which utilizes a replica of the original trans-
mitted carrier signal to improve the reception of weak
signals.
Synthesized - Capable of generating a large number
of different output frequencies, all related to a single,
highly stable reference source.
USB - Upper Side Band - The higher frequency portion,
excluding the carrier of an AM signal. A single side-
band signal, in this case the upper sideband, contains
all of the modulation information of amplitude modu-
lation in one half the bandwidth.
UTC - Universal Time Coordinated.
VFO - Variable Frequency Oscillator.
VHF - Very High Frequency band extends from approxi-
mately 30 MHz to 300 MHz.
Probable Cause Solution Problem
No front panel display or light. (A) Power connection.
(B) Defective AC ADAPTER unit.
(C) Batteries are discharged or not installed
for portable operation, no AC power.
(D) Light turned off with ‘LIGHT’ key.
(A) Check power supply cables.
(B) Check AC ADAPTER.
(C) Check/install batteries for portable opera-
tion.
(D) Turn light on with ‘LIGHT’ key.
No reception in XM mode. (A) XM antenna not connected.
(B) XM antenna not properly positioned. (A) Connect XM antenna.
(B) Position XM antenna for maximum signal
strength.
Only a few channels in XM mode. (A) Have not subscribed to XM service. (A) Subscribe to XM Service.
No signals heard when antenna is connected
or sensitivity is low. (A) Incorrect antenna input selected.
(B) Squelch set too high. (A) Select correct antenna input.
(B) Set Squelch to lower level.
Signal Strength indication but no sound
heard. (A) Improper mode selected.
(B) External speaker connected but defective.
(C) Squelch set too high. (A) Check mode selection.
(B) Check external speaker.
(C) Set Squelch to lower level.
No front panel operation such as tuning, fre-
quency entry, etc. (A) Lock enabled. (A) Press ‘CLEAR/LOCK’ and hold for 3 sec-
onds to unlock front panel.
Timer does not operate. (A) Clock(s) not set.
(B) Timer not properly set.
(C) Alternate clock selected.
(D) Timer(s) not enabled. (A) Set clock(s).
(B) Set clock(s) and program timer ON/OFF
times.
(C) Check that last displayed clock is the
desired one for timer event.
(D) Enable timers. Observe TIMER 1 or 2 on
display.
Passport to World Band Radio
Published by:
International Broadcasting Services, Ltd.
P. 0. Box 300
Penn's Park, Pennsylvania 18943
http://www.passband.com/
World Radio TV Handbook
Published by:
Billboard Publications Inc.
1515 Broadway
New York, NY 10036
http://www.wrth.com/
The ARRL Antenna Book
Published by:
The American Radio Relay League
225 Main Street
Newington, CT USA 06111
Copyright © 1988 by The American Radio Relay League
Library of Congress Catalog Card Number: 55-8966
http://www.arrl.org/catalog/?item=9043
The ARRL Handbook
Published by:
The American Radio Relay League
225 Main Street
Newington, CT USA 06111
Copyright © 1989 by The American Radio Relay League
Library of Congress Catalog Card Number: 41-3345
http://www.arrl.org/catalog/?item=1964
SUGGESTED REFERENCES