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5-3 TRANSMIT ADJUSTMENTS
1) Select an adjustment item using [↑]/[↓] on the PC's keyboard.
2) Set or modify the adjustment value as specifi ed using [←]/[→] on the PC's keyboard, then push [ENTER].
TRANSCEIVER'S
ADJUSTMENT
TX OUTPUT
1 • CH.
POWER
• Transmitting
(Hi power)
(L2 power)
2 • CH.
• Transmitting
(L1 power)
3 • CH.
• Transmitting
MODULATION
1 • CH.
BALANCE
• Transmitting
FM DEVIATION
1 • CH.
( Narrow mode)
• Transmitting
( Middle mode)*
2 • CH.
• Transmitting
( Wide mode)
3 • CH.
• Transmitting
CTCSS/DTCS
1 • CH.
DEVIATION
• Transmitting
*; [EUR] versions only
CONDITION
: 4
• Connect an RF power meter to the
antenna connector.
: 5
: 6
: 7
• Connect a modulation analyzer with an
oscilloscope to the antenna connector
through an attenuator.
: 8
• Connect a modulation analyzer to the
antenna connector through an attenuator.
: 9
: 9
: 10
• Connect a modulation analyzer to the
antenna connector through an attenuator.
OPERATION
5 - 6
ADJUSTMENT
VALUE
ITEM
[Power (Hi)]
4.0 W
[Power (L2)]
2.0 W
[Power (L1)]
1.0 W
Square
waveform
[BAL]
±2.05 to ±2.15
[MOD N C]
kHz
±3.25 to ±3.35
[MOD M C]
kHz
±4.05 to ±4.15
[MOD W C]
kHz
±0.65 to ±0.75
[CTCSS/DTCS]
kHz
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Do you have a question about the IC-F4001 and is the answer not in the manual?
Questions and answers
ptt pressed but not tx
The Icom IC-F4001 may not be transmitting when the PTT is pressed due to several possible reasons:
1. Transmit Inhibit Function – Transmission is restricted if:
- The channel is muted (PMR operation only).
- The channel is busy.
- A signal with an unmatched (or matched) CTCSS or DTCS tone is received.
- The selected channel is a "receive only" channel.
2. Time-Out Timer – If the transceiver has been transmitting continuously beyond the pre-programmed time limit, the time-out timer activates and stops further transmission.
3. Penalty Timer – After the time-out timer activates, the penalty timer may further inhibit transmission for a set period.
4. Power Supply Issues – If the transceiver is connected to a power supply with incorrect voltage or reversed polarity, it may not function properly.
5. Antenna Damage – If an RF signal stronger than 20 dBm (100 mW) was applied to the antenna connector, the transceiver’s front-end could be damaged, affecting transmission.
Checking these factors can help identify and resolve the issue.
This answer is automatically generated
Q73 trasistor does not work when PTT pressed but software is ok