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Malntsnance
-
494A/494Ap
Servlce
Vol.
l
Table
6-14
AUXILIARY
SYNTHESTZER
VALUES
AS A FUNCTION
OF N AND
A
Front-Panel
Registers
See
Table
6-15.
Table
6-15
FRONT.PANEL
REGISTERS
Writing
Data
to
Shift Registers
for
Lights
fi4)
DB3-1
-
Initiallzes
encoder
at
power
up
Writing to register
74
loads
data into
shift
registers
that drive all
the
lights on
the front
panel,
including
the
one for
the crt
graticule.
Four
8-bit
shift
registers
store
the data, requiring eight wlites of
four
bits
each
time
(one
bit for
each
register)
to
update
the
front-panel
lights.
This
table
shows
the
order
in
which
data is enter€d to
control
the
lights.
A
o
turns
on the light
(except
in
the
case
of
the
crt
graticule),
and
a 1
turns
off
the
light.
o
I
o
o
o
I
)
o
o
o
o
e
t
a
o
o
o
o
o
I
a
o
o
o
I
o
t
o
a
t
I
o
a
a
t
o
o
a
a
o
o
o
t
o
N
A
F*,
Result
N
A
Fou, Result
N
A Fou, Result
N
A
Fooi Result
31
31
31
31
31
31
31
g1
31
31
31
31
31
31
31
31
31
31
31
31
31
31
31
31
32
I
I
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
28
27
28
29
30
31
0
200.0
MHz
200.2
MHz
200.4
MHz
200.6
MHz
200.8
MHz
201.0
MHz
201.2
MHz
201.4 MHz
201.6
MHz
201.8
MHz
201.0
MHz
202.2MH2
202.4
MHz
202.6
MHz
202.8
MHz
203.0
MHz
2O3.2MHz
203.4
MHz
203.6
MHz
203.8
MHz
204.0
MHz
2O4.2MHz
204.4
MHz
204.6
MHz
204.8
MHz
92
32
32
32
32
32
32
32
32
32
32
92
32
32
32
32
32
92
32
32
32
32
32
32
32
1
2
3
4
5
6
7
I
9
10
11
12
13
14
15
16
17
18
19
20
21
22
29
24
25
205.0 MHz
205.2MH2
205.4
MHz
205.6
MHz
205.8
MHz
206.0
MHz
2O6.2MHz
206.4
MHz
206.6
MHz
206.8
MHz
207.0 MHz
207.2MH2
2O7.4MHz
207.6
MHz
207.8
MHz
208.0 MHz
208.2MH2
208.4 MHz
208.6
MHz
208.8
MHz
209.0 MHz
2O9.2MHz
209.4 MHz
209.6
MHz
209.8
MHz
32
92
32
32
32
32
33
33
33
33
33
33
33
33
33
33
33
33
33
33
33
33
33
33
33
26
27
28
29
30
31
0
1
2
3
4
c
6
7
I
9
10
11
12
13
14
15
16
17
18
210.0
MHz
210.2MH2
210.4
MHz
210.6
MHz
210.8 MHz
211.0 MHz
211.2MH2
211.4
MHz
211.6 MHz
211.8
MHz
212.0
MHz
212.2MH2
212.4 MHz
212.6 MHz
212.8MH2
213.0 MHz
213.2MH2
213.4 MHz
213.6
MHz
213.8
MHz
214.0
MHz
214.2MH2
214.4
MHz
214.6 MHz
214.8
MHz
33
33
33
33
33
33
33
33
33
33
33
33
33
34
34
g4
34
34
34
34
34
34
34
34
34
34
19
20
21
22
a
24
25
26
27
28
29
30
3l
0
1
2
3
4
5
6
7
I
9
10
11
12
215.0
MHz
215,2MH2
215.4 MHz
215.6
MHz
215.8
MHz
216.0
MHz
216.2MH2
216.4
MHz
216.6 MHz
216.8
MHz
217.0 MHz
217.2MH2
217.4 MHz
217.6
MHz
217.8MH2
218.0 MHz
218.2MH2
218.4
MHz
218.6
MHz
218.8 MHz
219.0
MHz
219.2MH2
219.4 MHz
219.6 MHz
219.8 MHz
220.0
MHz
Wrlte
Number
DB5
DB4
DB2
DB1
DBO
1
2
3
4
5
6
7
I
Not
Used
Not
Used
Not
Used
Not
Used
RECALL
SETTINGS
GREEN
SHIFT
Not
Used
AF
MAX
HOLD
MARKER
MENU
ADDRESSED
HELP
BLUE
SHIFT
Not
Used
MAX
SPAN
PULSE
STRETCHER
ZERO
SPAN
REMOTE
10
dB/Drv
2
dB/DrV
IDENT
MIN
NOISE
AUTO
RESOLN
UNCAL
GRAT ILLUM
FINE
READY
LINE TRIG
SINGLE SWEEP
FREE
RUN
TRIG
INT TRIG
EXT TRIG
TUNE MODE
UN
WIDE
NARROW
B_SAVE A
VIEW B
VIEW A
SAVE A
6-62