Rev B
12
SIGNAL
/Interval
routine (see above). When the signal measurement option is turned off, the
signal strobe character (signal status position) is replaced by a small square. The
SHIFT + SIGNAL
key sequence also assigns the arrow keys to the job of closing (
DOWNARROW
) and opening
(
UPARROW
) the pulse interval window, and
SHIFT + TIME
switches back and forth between pulse
interval (in milliseconds) and pulse rate (in beats per minute) display formats.
UPARROW
and
DOWNARROW
keys may also be assigned to their usual (command environment)
increment and decrement functions while scanning, using the key sequences
SHIFT + SET F
,
SHIFT +
SET G
and
SHIFT + SET SCAN
.
The decimal point (
.
) key stops (or starts) the scan at the current frequency and writes a colon
("
:
") or a direction arrow symbol in the scan status position in the lower right display quadrant.
The
SHIFT + SCAN
key sequence assigns the arrow keys to control of scan direction (
UPARROW
=
forward,
DOWNARROW
= backward) and manual scanning. This allows you to step quickly
through the scan table in either direction to find a particular frequency. Arrow key assignment is
indicated by a <=> symbol or a direction arrow in the delta status position.
Frequencies may be removed from and restored to the active partition while scanning is in
progress using the
SHIFT + F TABLE
key sequence to assign the arrow keys to delete (
DOWNARROW
)
and restore (
UPARROW
) functions. The assignment is indicated by a "+" character in the delta
status position, which changes on activation of either arrow key to a "+" or a "-" to indicate the
last operation performed. Restoration is applied on a "last out first in" basis only to frequencies
which have been previously deleted. Frequencies which have been deleted but not restored at
the end of a scanning session may be restored
en masse
using the
FTABLE
/Copy
function (see
below).
The
SHIFT + F2
key sequence calls a "scratch pad" routine for manual entry of mercator
coordinates, environmental measurements, or any other numeric data. The routine expects two
numbers, each up to 9 digits long, with each entry terminated using the
UPARROW
key and/or
edited using the
DOWNARROW
(= backspace) key. The two numbers are recorded, along with the
time and date and the frequency of the transmitter currently being scanned. In version W16, the
applications library program
Code_Log
uses the scratch pad memory area for "active code"
tables, which are allocated and de-allocated dynamically as the program runs. Memory is shared
rather freely, but
Code_Log
has priority in the sense that its initialization sequence also
initializes the scratch pad (destroys all scratch pad data) while memory initialization in
SCAN
does not affect the status of
Code_Log
's tables. For instructions on retrieval of scratchpad data,
refer to the
Operations and Exercises
section, or to the documentation supporting
Event_Log
or
Code_Log
, where applicable.
SCAN
key functions are summarized in the table below:
Key Sequence
Direct Effect
Arrow Keys
Delta Status Scan Status
.
Stop/Start
: - > or <-
SHIFT + SCAN
Scan up/
Scan down
<=> - > or <
-
SHIFT + SET F
Inc/Dec Frequency
F
SHIFT + SET G
Inc/Dec Gain
G
SHIFT + SET SCAN
Inc/Dec
Scan Time
T
SHIFT + SIGNAL
Signal
Measurements
Open/Close
Window
W
SHIFT + F TABLE
Remove/Restore
Frequency
+ + or -
SHIFT + TIME
Pulse Interval/
Rate