6 Settings & Controls
46
Enable Single Band mode
6.1.6
Set to the Single Band mode when there is no need to run two bands at the same time.
（→
[F]
－
[DUAL]
）
Adjust Volume Balance
6.1.7
When the transceiver is running in the
APRS
or
KISS mode
, adjust the volume of the band
used in the mode.
（→
Menu No. 910
）
Utilize Auto Power Off
6.1.8
The Auto Power Off feature prevents the battery power from draining when the power of the
transceiver is left on accidentally. In the factory setting, the power of the transceiver is
turned off automatically when there is no key operation for an interval of 30 minutes.
（→
Menu No. 921
）
6.2 Silent APRS and Packet Communications (Voice Alert)
The TH-D74A/E is capable of receiving radio signals of two different frequencies at the
same time. For example, if band A is used for APRS communication and band B for voice
communication, data bursts sound may be emitted when receiving packets for band A.
Volume Balance
6.2.1
The TH-D74A/E has only one volume control, but it is equipped with a function for adjusting
the balance between the volume of band A and band B.
（→
Menu No. 910
）
Voice Alert
6.2.2
The Voice Alert feature makes use of CTCSS. The CTCSS used for Voice Alert is referred
to as voice alert frequency. Audio is from the speaker only when signals with the matched
CTCSS coincides with the voice alert frequency are received.
For example, when calling a party to arrange a meeting time and place, it would be
necessary to press the
[PTT]
key repeatedly as the caller would not know whether the
signals have reached the receiver successfully. With the Voice Alert feature, the caller is
able to wait until the voice call is established without having to press the
[PTT]
key.
First of all, the speaker sound is muted when both users turn on the Voice Alert feature.
Next, when APRS beacon is turned on and both users move away from each other, the
sound received from the beacon is from the speaker when both users move to a distance
where signals can be received directly. In other words, when the sound received from the
beacon is heard, this means a voice call can been established.
6.3 Screen Capture of Radio Display
Screen Capture
6.3.1
The TH-D74A/E comes with a Screen Capture feature that is commonly found on
smartphones. By assigning the Screen Capture feature to any of the keys on the optional
SMC-34 Speaker Microphone with Programmable Function Keys and Volume Control, a
screenshot can be captured by pressing programmed key (
PF1
/
PF2
/
PF3
), and the captured
image will be saved to the microSD card.
（→
Menu No. 942/ 943/ 944
）
Summary of Contents for TH-D74A/E
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