NASA SX 35 DSC - Manual (Page 20)

18 SX 35 DSC
Working Channel Recall
Rather than using the SELECT knob or microphone keys to change chan-
nels, this feature allows quick switching between the last working channel
and the current primary channel.
To quickly switch between the last working channel and the Primary Call-
ing Channel:
• Use the SELECT knob or microphone keys to select a working channel,
such as channel 68.
• Press the 16 key momentarily. The current primary channel num-
ber appears in the channel number display.
• Press the 16 key again momentarily. The working channel number
appears in the display. Each time the key is pressed, channel selection
toggles between the primary channel and the working channel.
Transmitter Power Setting
The transmitter has two power settings, 25 watts or 1 watt, which are indi-
cated by
HI or LO appearing in the upper line of the display. The normal
power setting is HI for all channels where 25 watts is allowed. Use the 1
watt setting for communication with nearby vessels (bridge-to-bridge) or
facilities (drawbridges).
• Press the
HI/LO
key to toggle transmitter power between 25 watts and
1 watt output.
SPECIAL NOTE
Channels 15 and 17 are restricted to 1 watt maximum power and will
cause the error beep if the HI/LO key is pressed.
Channel Scanning
There are three channel scanning modes; Priority Scan, All Scan and Memory
Scan. In the Priority Scan mode, Channel 16 is checked for activity every 2
seconds, even if, the scan is halted by traffic on a working channel. When
scanning is halted by traffic, the scan pauses while the channel is active.
Scanning resumes, after a brief delay when the channel is clear. If the
PTT
is pressed, in reply to a received signal, scanning is cancelled.