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1. OPERATION
1-39
1.32 How to Reduce Second-trace Echoes
Echoes from very distant targets can appear as false echoes (second-trace echoes)
on the screen. The second-trace echo occurs when the return echo is received one
transmission cycle later, or after a next transmission of radar pulse.
Second-trace echoes
1. Press the MENU key to open the menu.
2. Use S or T to select [Echo] and press the ENTER key.
3. Use S or T to select [2nd Echo Rejector] and press the ENTER key.
2nd Echo Rejector options
4. Use S or T to select [Off] or [On] then press the ENTER key.
5. Press the MENU key to close the menu.
1.33 Watchman
The Watchman sounds the buzzer to tell the operator to check the radar display. The
radar transmits for one minute and then goes into standby for the selected time inter-
val. If the target alarm is active and a target is found in the alarm zone, Watchman is
cancelled, and the radar transmits continuously.
How watchman operates
In standby, the timer near the <WATCH> label at the center of the screen counts down
the remaining time until the transmission. When the set time interval has passed, the
audio alarm sounds, the timer disappears and the radar transmits for one minute. After
one minute, the audio alarm sounds, the radar stops transmitting and the watch alarm
timer again begins the countdown sequence.
If you press the STBY/TX key before the set time interval comes, the radar goes into
transmission.
Second-trace
echo
TX repetition
Actual range
False echo
range
Off
On
ST-BY
5,10 or 20 min.
Tx
1 min.
Watchman
starts
*
* Beep sounds just before radar transmits
or goes into standby.
ST-BY
Tx
*
5,10 or 20 min.
1 min.
*
*