NASA SX 35 DSC User Manual

Page 20

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

key momentarily. The current primary channel num-

ber appears in the channel number display.

•

Press the

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

appearing in the upper line of the display. The normal

power setting is

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.