Kenwood TS-990S Manual page 9

HF/50MHz TRANSCEIVER TS-990S
Super sub, which supports
simultaneous dual reception.
Two attractive features of simultaneous
dual reception for different bands are that
you can easily change the condx on other
bands and easily handle split-operation.
From this single device a whole new array
of strategies becomes possible.
Sub Receiver
The sub-receiver, which incorporates the TS-590S receiver
Down-conversion occurs on the
160m/80m/40m/20m/15m bands*
The sub-receiver features performance that has
exceeded its class since going on sale, thus further
refining this popular receiver on the TS-590S. Be-
cause this is particularly the case on the front end,
where it employs circuit configuration that makes
down-conversion possible on the leading five ama-
teur bands, it can be used in actual operation despite
being just a sub-receiver.
* The IF bandwidth for 160m/80m/40m /20m/15m bands is
(SSB/CW/FSK/PSK) for frequency levels 2.7 kHz or below.
Roofing filter, 500 Hz, 2.7 kHz
Frequencies of 500 Hz and 2.7 kHz are standard
for sub-receiver roofing filters. You can maintain a
8
Sub-receiver
more or less flat dynamic range even if interference
impinges on your reception frequency, thanks to
superior close-in dynamic range properties. You can
clearly catch signals under conditions made prob-
lematic by strong close-in interference signals.
Innovation spurred by digital technology has
revolutionized the Kenwood tone.
Even after using narrow bandwidth filters for long periods of time,
it is still easy to hear and less tiring to listen to.
In addition to introducing AGC control using dedicated DSP,
we have further refined the Kenwood tone and reception sound quality transmitted
by radio operators worldwide by innovating the analogue AGC unit
and installing numerous interference and noise elimination functions.
Such innovations have given new life to Kenwood's legendary tone.
Triple DSP