Yaesu FT-991A Operating Manual page 151

Receiver
Circuit Type:
Intermediate Frequencies:
Sensitivity:
Squelch Sensitivity ( TYP. ) :
Selectivity:
Image Rejection:
Maximum Audio Output:
Audio Output Impedance:
Conducted Radiation:
Specifications are subject to change, in the interest of technical improvement, without notice or obligation, and are
guaranteed only within the amateur bands.
Symbol placed on the equipment
Direct current
FT- 991 Operating Manual
SSB/CW/AM: Triple-conversion Super heterodyne
FM/C4FM: Double-conversion Super heterodyne
40.455 MHz
SSB/CW/AM: 69.450 MHz/9.000 MHz/24 kHz
FM/C4FM: 69.450 MHz/450 kHz
SSB/CW ( BW: 2.4 kHz, 10 dB S+N/N )
0.158 µV ( 1.8 - 30 MHz ) ( AMP 2 "ON" )
0.125 µV ( 50 - 54 MHz ) ( AMP 2 "ON" )
0.11 µV ( 144 - 148 MHz )
0.11 µV ( 430 - 450 MHz )
AM ( BW: 6 kHz, 10 dB S+N/N, 30 % modulation @400 Hz )
5 µV ( 0.5 - 1.8 MHz ) ( AMP 2 "ON" )
1.6 µV ( 1.8 - 30 MHz ) ( AMP 2 "ON" )
1.25 µV ( 50 - 54 MHz ) ( AMP 2 "ON" )
FM ( BW: 15 kHz, 12 dB SINAD )
0.35 µV ( 28 - 30 MHz ) ( AMP 2 "ON" )
0.35 µV ( 50 - 54 MHz ) ( AMP 2 "ON" )
0.18 µV ( 144 - 148 MHz )
0.18 µV ( 430 - 440 MHz )
There is no specification for frequency ranges not listed.
1.0 µV ( 1.8 - 30 MHz, 50 - 54 MHz ) ( AMP2 "ON" )
SSB/CW/AM
1.0 µV ( 144 - 148 MHz, 430 - 450 MHz )
0.35 µV ( 28 - 30 MHz, 50 - 54 MHz ) ( AMP2 "ON" )
FM
0.125 µV ( 144 - 148 MHz, 430 - 450 MHz )
There is no specification for frequency range not listed.
Mode –6 dB
CW/RTTY/PKT 0.5 kHz or better
SSB 2.4 kHz or better
AM 6 kHz or better
FM 12 kHz or better
70 dB or better ( 1.8 MHz - 50 MHz Amateur bands )
60 dB or better ( 144/430 MHz Amateur band )
2.5 W into 4 Ohms with 10% THD
4 to 8 Ohms ( 4 Ohms: nominal )
Less than 4 nW
Specifications
–60 dB
750 Hz or less
3.6 kHz or less
15 kHz or less
30 kHz or less ( –50 dB )
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