I] Tone Squelch Operation - Icom IC-820H Instruction Manual

The [PWR/COMP] switch selects the RF output
power or turns the speech compressor ON and OFF
according to the set mode selection. Set the desired
function to [PWR/COMP] as follows:
(1) Cancel the sub band access function in advance.
(2) Push [FUNC] then [TONE*SET] to enter set
Split frequency operation allows you to transmit and
receive on two different frequencies. The split fre-
quency operation is performed using 2 frequencies
on 2 VFOs.
@) Set a receive frequency in the VFO mode.
- Either VFO A or VFO B can be used.
(2) Push [FUNC] then [VFO-A=B] for 2 sec.
- The undisplayed VFO contents are cleared and
equalized to the displayed frequency.
i] Tone squelch operation
To operate the tone squelch, an optional UT-50 is
required. See p. 45 for installation. Two UT-50s are
required for dual band simultaneous operation.
The tone squelch opens only when receiving a
signal with the same pre-programmed subaudible
tone. You can silently wait for a call from group
members using the same tone. You can check the
tone frequency using the tone scan if desired. (p. 28)
C) Select the desired band with the [M/S] switch.
(2) Select FM mode, then set the desired frequency.
(3) Program the tone squelch frequency as at right.
(@) Push [FUNC] then [CHECK*T SQL] to turn the
tone squelch ON. ("T SQL" appears.)
(6) When the received signal includes the correct
tone, the squelch opens and the signal can be
heard.
- When the received signal includes an incorrect tone
or no tone, the squelch does not open, however, the
S-meter indicates the signal strength.
- To open the squelch manually, push and hold
[CHECK].
FUNCTIONS FOR TRANSMITTING 6
(3) Rotate the tuning dial to select the desired condi-
tion.
DISPLAY RF POWER COMPRESSOR
Low power Selectable
Co P-Hi High power Selectable
() Push [CHECK] to exit the set mode.
(3) Push [FUNC] then [CALL*SPLIT].
- "SPLIT" appears.
-Now you can receive on the displayed VFO and
transmit on the undisplayed VFO.
(4) To change the receive frequency, rotate the tun-
ing dial. To change the transmit frequency,
rotate the tuning dial while pushing [CHECK].
(6) Push [FUNC] then [CALL*SPLIT] to cancel.
To change the transmit and receive frequencies,
push [VFO] to exchange VFOs.
© Operate the transceiver in the normal way (push
[PTT] to transmit; release [PTT] to receive).
@ To cancel the tone squelch, push [FUNC] then
[CHECK*T SQL].
@ Setting the tone squelch
frequency
Frequencies can be independently set for each
band.
@ Push [FUNC] then [TONE*SET] to enter set
mode.
@ Push [TONE] 4 times to select the tone squelch
frequency setting display.
- When the sub band access is in use, skip this step.
(3) Rotate the tuning dial to select the desired fre-
quency.
@ Push [CHECK] to exit the set mode.
¢ Tone squelch frequency list (Unit: Hz)
203.5 | 241.8
210.7 | 250.3
26