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R & S E K 8 9 5 / R & S E K 8 9 6
User Manual
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BCD Interface R&S GC 890 (Option)
1.3.11 BCD Interface R&S GC 890 (Option)
1.3.11.1 Design
The BCD interface consists of the printed circuit
boards interface (A81) and filter (A82) and, in
addition, of two grey extracting levers, a
ribbon cable, the interface to the carrier board
and the external interface.
The ribbon cable is used to electrically
interconnect the two PCBs.
The filter is fixed to the rear panel by means of
two spacing pieces, two M3 x 5 Phillips screws
and two locking bolts.
1.3.11.2 Functioning
(See Fig. 1.15)
The receive frequency selected by the operator
is routed to interface BCD INTERFACE as a 22>
bit BCD data word via a buffer and RC filters.
At the interface HF Selector FK 101 may be con>
nected for example.
In SSB operation not the nominal but the
center frequency of the selected sideband is
buffered.
By means of the RC filters any external inter>
ferences are blocked off.
Buffer
100Hz1
100Hz2
100Hz4
100Hz8
1kHz1
1kHz2
1kHz4
1kHz8
10kHz1
10kHz2
10kHz4
10kHz8
100kHz1
100kHz2
100kHz4
100kHz8
1MHz1
1MHz2
1MHz4
1MHz8
10MHz1
10MHz2
8>out>of>3
Converter
Data Bus
Address
CS
Fig. 1.15 BCD Interface R&S GC 890 (Option), Block Diagram
6164.0717.02_01
> 1.28 >
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