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FIGURE
3-2- CLOSE-UP
OF LCD'S
AND
MEMBRANE KEY BO
ARD
3.4.0 PROGRAMMl
NG
SEQ
UENCE
The unit
has
three
program keys
,
B
I
~=
I
and
I
~
I
Depressing any key will
initiate the user programming
states
as detailed below.
The
left and
right
vertical cur-
sors
for
LCD
measurement
displays
and
the
vertical
cursor in
the modulation
section will
not respond
whenever the
unit is in
a
data
entry state.
When in
any
programming
sequence
,
only
numeric digits
0-9,
I("' "
I
EJ
and
left
and
right
cursors
respond.
3.4.1 GENERA
TOR
A ND
MONITOR FREQ
UENCY
The
service
monitor
has the
capability of storing a
separate frequency
for monitor and
generate. T
o pro-
gram the
monitor frequency,
set
the
function
switch
to
"Pwr Mon" or "Sens
Mon" ("Anlzr Pwr Mon" or "Anlzr
Sens
Mon"
can also be used
on
the
R-2400).
To enter an
RF
frequency press
the
B
program key.
Immediately
the first
digit
on the
left LCD
will
blink
indicating the point of entry. Next enter
the desired
fre-
quency. Resolution is
specified at 100Hz on
frequencies
to
999.9999 MHz meaning
seven
decimal
digits
are valid
entries. As the
7
digits are entered
using
the
keys
0
through 9, the blinking cursor moves to the
right
auto-
matically but may also be
manually moved using
the
I[>
I
right
or
I
<l
l
left cursors.
To
clear the
entire entry,
press
IR-•1
,
if the
lA
...
•]
key is immediately
depressed a
second
time, the original
number
stored in
memory is displayed
and the programming
sequence is terminated. Pressing
I
1
"'"]
loads
the frequency and also
leaves the frequency
programming mode.
For
example
if a
frequency
195.050 MHz is present in
the
left LCD
display,
an
RF monitor frequency 455.321
MHz
can
be entered into the non volatile
memory
as:
Press
Press
Numeric
Program
Key
Key
Display
Comment
B
190.050
4
490
.050
5
450
.050
6
456.060
@)
456
.060
Manually Correct Entry
5
455.060
321
455.321
Complete Entry
EJ
455.321
NOTE:
Shaded
area indicates flashing
<ligit.
(point
of
data
entry)
The
monitor
RF
frequency
is now
stored.
The
same
se-
quence
is
used
to
program the
generator
RF frequency,
except
the function switch should
be set to the "Gen" or
"Hi Gen" position.
3-3
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