Table of Contents
Advertisement
Controls and Indicators
Top Indicators and Display
Antenna Connector - Connect antenna to this TNC port
Lockout Switch - Locks out a selected channel from
channel scan.
Talk Around Channel (TAC) Switch - Toggles Talk
Around Channel function between on and off.
Channel Up/Down Switches - Use to select a channel.
On/Off Volume Control - Rotate clockwise to turn the
radio on and increase the volume. Rotate
counterclockwise to turn the radio off or decrease the
volume.
TX/Busy Indicator - The red LED lights when you
press the PTT switch (to transmit). It blinks when the
battery is low and needs recharging. The green LED
lights when the received signal (on the current
channel) is strong enough to break squelch.
LCD Display - The liquid crystal display (LCD) has
several indicators that show the current operating
mode. The two digits at the right
show the current selected
channel. The smaller, two-letter
displays show which features
are enabled.
TA Talk Around Channel enabled
CA call received
TN DTMF feature selected
LO low power TX selected
CT CTCSS feature enabled
SPH 516D
- 4 -
SPU 416K
Drop Out Delay
While scanning, the radio stops at a busy channel and
receives a transmission. When the received call is
over, it resumes scanning.
TRANSMIT
1.
The nominal transmit power output level is 5 watts
for the SPH 516D and 4 watts for the SPU 416K.
To switch to low power, press the HI/LO switch.
LO appears on the LCD and the transmit power
output level is changed to 1 watt.
To switch back to high/default power, press the
HI/LO switch again. The TX power returns to high,
and the LO indicator disappears from the LCD.
2.
Before you transmit, press the monitor switch and
listen for activity on the selected channel.
3.
When the channel is clear, press the PTT switch to
transmit. The TX LED comes on when you
transmit. Hold the radio with the microphone
approximately two inches in front of your mouth
with the antenna at approximately a 45-degree
angle away from your head. Speak in a clear,
normal, conversational voice.
4.
When you are through speaking, release the PTT
switch and listen for an answer.
Transmit Time Out Timer
Continuous transmission time is limited. When you
transmit longer than the preset time, you hear a beep
from the speaker, and the radio automatically returns to
receive mode. When you release the PTT button, the
Time Out Timer is reset.
Busy Channel Lockout
You cannot transmit while you are receiving a signal.
Talk Around Channel
Normally, transmissions between your transceiver and
other units are sent through radio relay facilities
(repeaters) that retransmit your messages from an
antenna system located atop a high building, a hill or a
mountain. This allows dependable communications
over much longer distances.
SPH 516D
- 9-
SPU 416K
Advertisement
Table of Contents
