Barrett SB220
The SB220 and SB220RC transceivers are compact single conversion fully broadband transceivers rated at 180 watts P.E.P voice duty cycle.
(In Australia and New
Zealand power is reduced to 100 watts P.E.P to conform to local specifications.)
Both
models are available in 12 or 24 volt versions.
On/Off
volume.
Variable
threshold Mute. (voice frequency operated.)
Impulse
noise blanker.
12
channel capacity. *
See below.
2
to 18.1 Mhz frequency coverage.
2
frequency simplex operation.
Two
tone generator. Export.
RFDS
emergency call. Australia.
Single
tone generator for checking power output and aerial performance.
Channel/Frequency
indicator. (l.e.d.)
Data
Port. Facilitates radio telex or non standard selcall systems.
High
intensity led. power indicators.
The
SB220 is available in two versions. Semi synthesized, crystal locked and fully
synthesized reprogrammable in the field.
Onboard
reprogramming circuitry gives unlimited channel capacity and obviates the need
to attend a service centre to have frequencies changed.
The
Semi synthesized version is available from November 1986 the reprogrammable
version will be available 1987.
Reliability
and Serviceability
The
SB220 is a highly reliable transceiver evolved from our F-24 aircraft HF
Transceiver. Special attention to serviceability during the design of the SB220
makes servicing, if required, efficient and inexpensive.
To
improve reliability and serviceability the circuit boards are not placed one on
top of the other. Further no PCB plugs into any other. The transceiver has only
two main circuit boards, these being the IF. and P.A. They are located one on
each side of a central metal deck and are independently connected via a very
simple loom to each other. This concept means that every part of the circuitry
is accessible without extender cables or jigs. No special test equipment is
required to fault find the equipment. When removed for service the IF. board may
be powered up from the transceiver.
The front panel swings down to allow changing any of the front panel controls and/or loudspeaker.
The
SB220 family of transceivers is suitable for base station
or vehicle installation. Many features which are optional (if available) on
other manufacturers equipment are standard on the SB220. The SB220 may be
internally fitted with a number of types of selcall system. Connection of ARQ
radio telex systems and Packet Data systems is facilitated via the standard data
port.
Via
this port any non standard modem or selcall system can be accommodated.
The
transceivers have very high speed switching TX/RX functions to permit the
connection of ARQ telex systems. Special circuitry suppresses any extraneous
noise associated with the TX/RX switching process. This ensures maximum speed of
transmission of data.
The transceiver is lightweight and physically small. For vehicles with very limited space the SB22ORC is recommended.
Options available are:— Bolt
on heat sink for Data Transmission.
Digital
selcall.
Channel
scanning tied to selcall.
ARQ
Radio telex.
Packet
Radio Data Transmission.
Channel
frequency synthesizer, with onboard reprogrammable memory for unlimited channel
capacity. (Available 1987).
A
complete range of accessories including aerials, power supplies, remote control
systems and data transmission equipment.
Finish.
Seimens
Stipple Grey case. Black epoxy powdercoat front panel with white lettering.
Weight.
SB220
including cradle and microphone. 4.01 kg.
SB22ORC
5 to 6 kg depending on the length of interconnect cable.
Size
SB220
SB22ORC
W.250mm H.90mm. D.3lOmm
W.155mm H.9Omm D.llOmm.
Control Head.
Main Unit as per SB220.
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