CT590 user’s manual | 21
Alarm Mode (AL-MOD) - MENU No.32
This function can set the tone alarm/code alarm/site alarm of the radio.
Keep pressed the CALL button for 3 seconds to start the alarm tone.
The following three options can be selected:
SITE ALARM: the speaker emits an alarm tone but the radio doesn’t tra-
smit;
TONE ALARM: the speaker emits an alarm tone and the radio transmits it;
CODE ALARM: the speaker emits an alarm tone and the radio transmits it
followed by ANI-ID code.
Frequency band (BAND) - Menu No.33
In frequency mode, push the BAND button to choose the desired frequency
band.
VHF: 144 - 146MHz UHF: 430 - 440MHz
Dual Watch (TDR-AB) - Menu No.34
When this function is on, you may receive signals of A/B channel or frequency.
It can also be used for cross band receiving and transmitting.
You can choose amongst the following settings:
OFF: CT590 can receive in both VFO (not simultaneously); ▲ or ▼ will blink
on the transmitting frequency band
A: the radio can receive in both VFO (not simultaneously) but can transmit
in VFO A only.
B: CT590 can receive in both VFO (not simultaneously) but can transmit
in VFO B only.
If you choose option A, it means that 465.575MHz is the tx frequency band,
while 136.225MHz is the rx frequency band; the upper VFO shows 465.575
MHz while in the lower VFO 136.225MHz will be displayed; you can receive
on both 465.575 MHz and 136.225 MHz, but can transmit on 465.575 MHz
only.
While if you choose option B, 136.225MHz is the tx frequency band and
465.575MHz is the rx frequency band. In the upper VFO 465.575 MHz will
be displayed while the lower VFO will show 136.225 MHz; you can receive on
both 465.575 MHz and 136.225 MHz, but transmit on 136.225 MHz only.
Example: the LCD displays
VOX
400.875
136.225
460.1253
151.2354
465.575
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