Icom IC-751A Service Manual page 6

1-3 RECEIVER
Receive system
Receive modes
Intermediate frequencies
Sensitivity
(PREAMP ON)
Squelch sensitivity
Selectivity
Spurious and image response rejection :
Audio output
Notch filter attenuation
RIT variable range
- SSB, CW, RTTY, AM
Quadruple-conversion superheterodyne with continuous bandwidth control.
FM
Triple-conversion superheterodyne.
: SSB (J3E) Upper and Lower sideband
CW (AIA)
FM (F3E)
RTTY (F1A)
AM _ (A3E)
: Ist: All modes 70.4515MHz
2nd: SSB 9.0115MHz
CW, RTTY 9.0106MHz
FM, AM 9.0100MHz
3rd: All modes 455kHz
4th: SSB 9.0115MHz
CW,RTTY 9.0106MHz
AM 9.0100MHz
: SSB, CW, RTTY
0.1~ 0.5MHz Less than 0.5.:V for 10dB S/N
0.5~ 1.6MHz Less than 1uV for 10dB S/N
1.6 ~ 30.0MHz Less than 0.15.:V for 10dB S/N
AM (NARROW FILTER selected)
0.1~ 0.5MHz Less than 3uV for 10dB S/N
0.5~ 1.6MHz Less than 6uV for 10dB S/N
1.6 ~ 30.0MHz Less than 1yV for 10dB S/N
FM
28 ~ 30MHz Less than 0.3uV for 12dB SINAD
: 1.6~30MHz Less than 0.3uV
: SSB, CW, RTTY (WIDE FILTER selected), AM (NARROW)
2.3kHz at —6dB point
3.8kHz at —60dB point
CW, RTTY 500Hz at —6dB point
1.3kHz at —60dB point
FM 15kHz at—6dB point
30kHz at —50dB point
AM (WIDE FILTER selected) 8kHz at—6dB point
18kHz at —50dB point
image rejection More than 80dB
IF rejection More than 70dB
: More than 2.6 watts at 10% distortion with 8 ohm load.
: More than 45dB
: +9.9kHz