Icom IC-718, Service Manual

Page: 4 / 54

SECTION 1 SPECIFICATIONS
1 - 1
■
GENERAL
• Frequency coverage :
Receive 0.030–29.999999 MHz* 1
Transmit 1.800–1.999 MHz* 2 3.500–3.999 MHz* 2
7.000–7.300 MHz 10.100–10.150 MHz
14.000–14.350 MHz 18.068–18.168 MHz
21.000–21.450 MHz 24.890–24.990 MHz
28.000–29.700 MHz
* 1 Guaranteed range: 0.5–29.999999 MHz.
* 2 Varies accoding to version.
• Mode : USB, LSB, CW, AM, RTTY (FSK)
• No. of memory Ch. : 101 (99 regular, 2 scan edges)
• Freq. resolution : 1 Hz
• Frequency stability : Less than ±200 Hz from 1 min. to
60 min. after power ON. After that
rate of stability less than ±30 Hz/hr
at +25˚C (+77˚F). Temperature
fluctuations 0˚C to 50˚C (+32˚F to
+122˚F) less than ± 350 Hz.
• Power supply requirement: 13.8 V DC ±15 %
(negative ground)
• Current consumption :
Transmit max. power 20.0 A
Receive stand-by 1.3 A
max. audio 2.0 A
• Usable temp. range : –10˚C to +60˚C (14˚F to 140˚F)
• Antenna connector : SO-239 (50
Ω
)
• Dimensions : 240 (W) ✕ 95(H) ✕ 239(D) mm
(projection not included)
9 7 ⁄
16
(W)
✕
3 3 ⁄
4
(H)
✕
9 13 ⁄
32
(D) in
• Weight : 3.8 kg (8 lb 6 oz)
• ACC connector : 13-pin
• REMOTE connector : 2-conductor 3.5(d) mm ( 1 ⁄
8
")
■
TRANSMITTER
• Modulation system :
SSB Balanced modulation
AM Low level modulation
• Output power :
SSB/CW/RTTY/FM 2–100 W
AM 2–40 W
• Spurious emission : Less than –50 dB below peak out-
put power
* spurious frequency ; below 30 MHz: –50 dB,
above 30 MHz: –60 dB
• Carrier suppression : More than 40 dB
• Unwanted sideband suppression:
More than 50 dB
• Mic. connector : 8-pin connector (600
Ω
)
• KEY connector : 3-conductor 6.5(d) mm ( 1 ⁄
4
")
• SEND connector : Phono (RCA)
• ALC connector : Phono (RCA)
■
RECEIVER
• Receive system : Double-conversion
superheterodyne
• Sensitivity
(10 dB S/N)
:
SSB, CW, RTTY 0.16 µV* 1 (1.8–29.999999 MHz)
AM 13 µV (0.5–1.799999 MHz)
2.0 µV*
1 (1.8–29.999999 MHz)
*
1
Pre-amp 1 ON
• Squelch sensitivity : Less than 5.6 µV (SSB)
• Selectivity :
SSB, CW, RTTY More than 2.1 kHz/–6 dB
Less than 4.5 kHz/–60 dB
AM More than 6.0 kHz/–6 dB
Less than 20.0 kHz/–40 dB
• Spurious and image rejection ratio:
More than 70 dB
(1.8–29.999999 MHz)
• Audio output power : More than 2.0 W
(at 13.8 V DC)
at 10 % distortion with an 8
Ω
load
• RIT variable range : ±1200 Hz
• PHONES connector : 3-conductor 6.5(d) mm ( 1 ⁄
4
")
• EXT SP connector : 2-conductor 3.5(d) mm ( 1 ⁄
8
") 8
Ω
All stated specifications are subject to change without notice or obligation.