Watkins-Johnson Company WJ-8711A, Инструкция по установке, эксплуатации и обслуживанию

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LOCAL OPERATION WJ-8711A DIGITAL HF RECEIVER
3-2
As shown in
Foldout FO-2
, three sections of the front panel have shaded backgrounds. These
shaded areas are provided as an aid to the operator by grouping sets of keys within particular functional areas
of receiver operations. For example, the shaded area on the far left of the front panel indicates that all keys
and the display within that area are associated with Memory and Scan operations and is referred to as the
Memory/Scan Section. The shaded area in the center of the front panel contains keys and displays that are
associated with the auxiliary parameters of the receiver such as detection mode, IF bandwidth, squelch, etc.
This area is referred to as the Auxiliary Parameter Section. The third area highlights the 16-key keypad.
The following paragraphs provide more details on the general use of each control, indicator,
and display.
3.2.1
THE TUNED FREQUENCY DISPLAY
The tuned frequency display is an 8-character numeric display, located at the top right-hand
corner of the front panel. The label FREQUENCY MHz is located just above it. This display shows the
receiver's current tuned frequency from 00.000000 to 30.000000 MHz. In some tuned frequency edit modes, a
cursor is present in one digit of the display. The cursor takes the form of a digit that is constantly changing in
intensity (i.e. the digit appears to be flashing). The cursor is used in decade tuning, meaning that the digit
highlighted by the cursor can be adjusted from 0 to 9 using the tuning wheel or up/down arrow keys. An
example of the tuned frequency display is shown below.
FREQUENCY MHz
2 1 . 1 2 2 3 5 7
As seen in the example above, the display contains (from left to right) two digits, a decimal
point, and six more digits. The far left digit is the 10-MHz position and the far right digit is the 1-Hz position.
A number always appears in each position in the display with the exception of the 10-MHz position. The 10-
MHz position is blank when the tuned frequency is 9.999999 MHz or less and the cursor is not currently on
that digit. When the tuned frequency is 0.999999 MHz or less, a zero (0) is displayed in the position to the left
of the decimal point (1-MHz position).
3.2.2
THE TUNE LOCK KEY AND LED
The function of the TUNE LOCK key is to allow the operator to "lock out" any possibility of
changing the displayed tuned frequency, either intentionally or inadvertently by turning the tuning wheel or
pressing the up (
↑
) or down (
↓
) arrow keys. When the tune lock function is enabled, the LED in the TUNE
LOCK key is lit, the cursor disappears from the tuned frequency display, and the up/down arrow keys and
tuning wheel are disabled and have no effect when used.
Courtesy of http://BlackRadios.terryo.org