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From the function cables shoving the st:andard programing for
303 IC5 -1C9 on pages 7-11 to 7-15 the input addresses and ire-
quency coverage can be seen.
The word pattern sheet on page 3-17 is at your disposal.
3.2.11. On the package of each PRon a selfadhesive sticker should be placed
indicating in which scicket it is [o be mounted. The stickers are
narked
0-6.3,
6.4-12.7,12.8-19.1,19.2-25.S
and
25.6-31.9
correspond-
ing to IC 9 to 5 respectively.
3.2.12.
Example:
Assume that the frequency range fron 1600.0 kHz to 1899.9 kHz is to
be prograrmed for operation in band W of the T 5002.
From the table 3.2.4. the code for band W is read: "1011".
From the f unction table for 303 IC9 on page 7-11 we have the addresses
to be changed:
1600.0 kllz -1699.9 kHz
address 8
(lou order byte)
1700.0 kHz -1799.9 kHz
address 8
(high order byte)
1800.0 kHz -1899.9 kHz
address 9
(low order byte).
The PRon must be programied as shorn below:
3.2.13. When transmitting on frequencies below 1600.0 kHz the keyline in the
exciter must be enabled. This is done by changing the band decoder
PROM 303 IC16 labelled 382 239 7
into a PROu labelled 382 239 8 .
The difference betueen the two PROus is the 07 bit in address 0. The
function tables are shown on page 7-16 and page 7-17.
3.2.14. when the PROMs are co be installed in the I)i§play and Keyboard EE
make sure that they are mounted correctly.
The three f requency memory PROMs are mounted on the back of the I)i8play
and Keyboard
303
in the sockets marked A, 8 and C. PRon A i8 rounced
in the socket mrked with an A, PROM 8 in socket a and PROu C in socket
C.
The f ive band decoder memory PROMs are mounted in ttieir appropriate
§ockec§ . The PRon marked 0-6.3 in the socket marked 0-6.3, the PROu
6.3-12.7 in the socket 6.3-12.7 etc.
The top mrk of the PROM package is to be uppemost when the Display
and Keyboard is mounted in its aomal position.
The band decoder PROM is soldered onto t:he front of the I)i8play and
Keyboard EE . This is due co the fact that the PRon is u8unlly only
changed when the exciter is installed in coaj`mction with a tran®nitter.
3-7
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