Icom IC-471H Instruction Manual page 10

44. CN DELAY CONTROL
In semi-break-in operation, this controls the transmit/receivé
switchover time-delay. Adjust to suit your keying speed.
(Note: 1f the delay is set to the shortest position, it will
reach almost full break-in CW.)
45. VOX DELAY (VOX time contstant) CONTROL
This controls the transmit to receive switching time. Adjust
it so transmit to receive switching will not occur during
short pauses in normal speech.
46. VOX GAIN CONTROL
This control adjusts the input signal level via the micro-
phone to the VOX circuit. For VOX operation in SSB,
adjust the control so that the VOX circuit will operate with
normal speech.
4-3 REAR PANEL CONNECTIONS
49. ANTENNA (ANT) CONNECTOR
This is used to connect the antenna to the set. Its imped-
ance is 50 ohms and connects with an N type (UG-21/U)
connector.
50. GROUND TERMINAL
To prevent electrical shock, TVI, BCI and other problems,
be sure to ground the equipment through the GROUND
TERMINAL. For best results use as heavy a gauge wire or
strap as possible and make the connection as short as
possible, even in mobile installations.
51. KEY JACK
For CW operation, connect a key here. For electronic
keying the closed key terminal voltage must be less than
0.4V DC.
52. DC POWER SOCKET
For connection of the IC-PS15's DC power cord, or other
suitable power supply.
E
47. ANTI-VOX CONTROL
In VOX operation, the VOX circuit may be operated by
sound from the speaker causing a switch to transmit. This
trouble can be prevented by adjusting the input level of the
ANTI VOX circuit with this control along with the VOX
gain control so that the VOX circuit only operates from the
operator's voice, not by sound from the speaker.
48. CW MONITOR (MONI) CONTROL
This control adjusts the audio volume of the side-tone
(monitor) audio during CW transmit operation. Adjust it to
your desired level for easy listening.
GOPTIONAL INTERFACE UNIT
CONNECTOR POSITION
6) ACCESSORY SOCKET
@KEY JACK
Ч а те oDe POWER CONNECTOR
воз. |
| 9
v
OPTIONAL BUILT-IN AC POWER
SUPPLY CONNECTOR POSITION
-
~
Ы аттанан и
@ GROUND TERMINAL
@EXTERNAL SPEAKER JACK
53. EXTERNAL SPEAKER JACK
When an external speaker is used, connect it to this jack.
Use a speaker with an impedance of 8 ohms. When the
external speaker is connected, the built-in speaker does
not function.
54. ACCESSORY SOCKET
Various functions are available through the accessory
socket such as modulation output, receiver output, T/R
change-over, and so forth. Refer to the ACCESSORY
SOCKET CONNECTION on page 28.
55. OPTIONAL INTERFACE UNIT (IC-EX309) CON-
NECTOR POSITION
This is provided to install the DP-25 connector of the
optional interface unit, IC-EX309.
56. OPTIONAL BUILT-IN AC POWER SUPPLY
SOCKET POSITION
This is provided to install AC power socket plate of the
optional built-in AC power supply, IC-PS35.