DRS WJ-8611, Инструкция по установке, эксплуатации и обслуживанию

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WJ-8611 DIGITAL VHF/UHF RECEIVER
LOCAL OPERATION 3-27
3.4.2 LOCKOUT MEMORY
The Lockout Memory is used in connection with the receivers F1-F2
W/LK scan mode (Frequency Scan with Lockout). It permits portions of
the scanned frequency spectrum to be locked out to prevent the receiver
from stopping on signal activity of no interest. If a scanning receiver
encounters a signal in a locked out area, it ignores the signal regardless of
its signal strength, relative to the programmed squelch level. The receiver
is capable of storing up to 200 lockout channels. Lockouts are entered by
specifying the frequency range in terms of the center frequency and
bandwidth. A lockout is entered into memory in the following manner:
1. Tune the receiver to the signal that is to be locked out.
2. Select an appropriate IF bandwidth to surround or include the entire
spectrum of the signal. For signal activity with bandwidths greater
than 200 kHz, two or more lockout channels may be required to
totally lock out the signal spectrum.
3. When the center frequency and bandwidth are set, press the SHIFT
key to enter into the front panel shift mode, and press the
LOCKOUT key (LOCKOUT/STORE). The Lockout menu appears
in the parameter display, and the frequency and bandwidth are
stored in memory. When stored, the display increments to the next
available lockout channel.
4. The lockouts are stored in Lockout memory in the order that they
are entered. If desired, a specific channel can be designated by
entering the channel number at the keypad and terminating the entry
by pressing the LOCKOUT key. The EDIT knob may also be used
to step through the lockout channels to review the stored data or to
designate the channel number for the next lockout entry.
3.4.3 CLEAR MEMORY
The Clear Memory function is a three-step sequence that clears the
receiver’s 200-channel Channel and Lockout memories. It is initiated by
pressing the Clear Entry (CE) key in succession. Pressing the CE key two
times displays a warning that the next key press will clear the memory
(NEXT=CLR MEM). If the key is pressed a third time, the memory is
cleared, and a confirmation is displayed (MEM CLEAR). The Clear
Memory sequence can be aborted at any time before the third key press, by
pressing a key other than CE.
3.5 SCAN OPERATIONS
The Scan mode is an automatic mode of operation, where the receiver is
pre-programmed to search through a specified frequency band or to step
through a series of discrete frequencies in search of signal activity. There
are three types of scan operations that can be performed by the WJ-8611
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