Swann CUBIC ASTRO 102 BX Service Manual page 59

_CUBIC
COMMUNICATIONB
S"A.
DIVISlaN
ing oscillator is continuously variabIe, we have achieved continuously var-
iable bandwidth. Skillful operation of this system by the operator can re-
sult in useful copy of signals that would otherwise be uncopiable due to
heavy interference from nearby signaIs. Such a scheme, with a unique visual
indication of the bandwidth to which it is adjusted, is included in the Astro
l02EX.
The following two pages provide data on the diode ring double balanced mixers
used for Z2l01, Z2102, and Z5101. The first type uses discrete diodes and
the second uses a monolithic diode array. The two l'nits are intorchangeable.
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