Drake - R8B - Receiver
Manufacturer:
Equipment:
R8B
Date:
1997
Category:
Group:
Sub Group:
Information
The R8B communications receiver is a microprocessor
controlled, synthesized, all mode, world band receiver
with continuous coverage capability from 100 through
30,000 kHz. The receiver offers excellent sensitivity,
selectivity, high dynamic range and offers features for the most
demanding shortwave reception. Conveniently located
front panel controls allow for rapid operator programming
and ease of use. Operating mode and corresponding bandwidth
are quickly selected by front panel but-
tons. The selectable AC input allows for operation around
the world. In addition, a DC input is provided for mobile
operation.
A High-Q, 8-pole, electronically switched IF filter provides
a range of five commonly used bandwidths. These band-
widths are automatically selected by mode, however
any bandwidth may be selected at the touch of a button.
The front panel liquid crystal display provides visual feed-
back to the operator of the current status of the receiver.
The seven digit frequency display allows tuning resolution
to 10 Hz accuracy.
In the AM mode, a selectable sideband synchronous
detector (SYNCHRO) allows for enhanced reception by
eliminating or reducing distortion due to fading signals
and allowing the passband to be shifted toward one
sideband, to reject interference, without causing audio
A PASSBAND OFFSET control also aids in reducing or
eliminating interfering signals by electronically shifting the
receiver's IF frequencies without disturbing the operating
frequency. This action allows the operator to electronically
move interfering signals out of the receiver’s pass-
band thus utilizing the high degree of selectivity provided
by the High-Q, 8-pole IF filter.
Other built-in reception aids include selectable AGC
speed, dual antenna inputs, noise blanker(NB), RF
preamplifier for enhancing weak signals, RF attenuator for
further
improvement of strong signal handling capabilities, ad-
justable RF gain, NOTCH, TONE and SQUELCH controls.
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 1000 independent
receive memories. In addition, these memories are
stored in a battery backed-up memory chip to ensure
memory retention during power line failure. Any of these
memories may be altered by the operator and re-stored.
These memory channels may be accessed manually or
by various scanning methods.
Finally, a built-in RS-232 compatible interface allows
complete digital control of the receiver including memory
and scanning functions.
User manual
Manual type:
User manual
Pages:
44
Size:
681.3 KB
Language:
english
Revision:
Manual-ID:
3851305A-9-1997
Date:
January 1997
Quality:
Electronic document, no scan, very well readable.
Upload date:
Aug. 9, 2017
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0249e732-54d4-09a7-d580-c9ece76e7403
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528