Walter Drake SW8 - Manual (Page 7)

Introduction - General Description 1
The SW8 is a microprocessor controlled, synthesized,
world band receiver with continuous coverage capabil-
ity from 500 kHz through 30 MHz which includes the
AM broadcast and shortwave bands. Reception also
includes FM broadcast (87 - 108 MHz) and Aircraft
(118-137 MHz). The SW8 offers excellent sensitivity,
selectivity, dynamic range and features that permit easy
tuning of desired stations. Conveniently located front
panel controls allow for rapid operator programming
and ease of use. The unit can be operated from either
the supplied AC Adaptor or from six “D” cell batteries
(not supplied) for portable operation. A low battery
voltage indication is displayed when that condition
exists.
Three electronically switched IF filters are provided.
The front panel liquid crystal display provides feedback
of the current status of the receiver. The seven digit
frequency display provides resolution to 100 Hz
accuracy in the AM broadcast, Aircraft and Shortwave
bands. Resolution to 20 kHz is displayed in the FM
broadcast band mode. Backlighting of the display is
selectable by a front panel button. To prolong battery
life with internal battery operation, the backlighting
automatically turns off after a short delay following a
function change or retuning of the receiver.
Reception modes include Lower/Upper Sideband
(LSB), (USB), and AM in the Shortwave, AM broadcast
and Aircraft bands. For the Shortwave and AM
broadcast bands, a selectable synchronous detector
(SYNC) allows for enhanced reception by eliminating
or reducing distortion due to fading signals. During FM
broadcast use, stereo reception is available through the
use of headphones.
Other built-in reception aids include selectable slow or
fast AGC, RF attenuator for use in strong signal
handling conditions and TONE control.
Two independent, real time clocks provide a local and
alternative time selection. Also provided is a two event
timer.
A programmable memory area allows for 70 indepen-
dent receiver set up memories. These memories do
not require battery backup and are thus unaffected by
power interruptions. All parameters associated with a
particular memory channel are stored including the
frequency, mode, bandwidth, fast or slow AGC, RF
attenuator and synchronous detector. These memory
channels may be accessed manually or through a time
scan with each channel monitored for a 5 second
period.
TONE
VOLUME
POWER
push
H L
TUNING BAND
SSB
5
BW
6 SCAN
MEM
LAMP
9 STORE
VFO
SKIP
CLEAR
BEEP
TIMER
CLOCK
AGC
8
AM
SYNC
4
DEL
0
ATT
7
BCB
1
AIR
2
SW
3 F
AGC S AM SYNC
METER
TIMER
+60
+40
+20
9
7
5
3
1
KHz
SW
M E M
6.0
SW8 World Band
Shortwave Receiver
LSB