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Yaesu FT-991A Manual

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Page 144 FT-
991
OperaTing Manual
General
Rx Frequency Range: 30 kHz - 56 MHz, 118 MHz - 164 MHz, 420 MHz - 470 MHz
(
operating
)
1.8 MHz - 54 MHz, 144 MHz - 148 MHz, 430 MHz - 450 MHz
(
specied
performance, Amateur bands only
)
Tx Frequency Ranges: 1.8 MHz - 54 MHz, 144 MHz - 148 MHz, 430 MHz - 450 MHz
(
Amateur
bands only
)
Frequency Stability: ±0.5 ppm
(
after 1 minute @+14 °F to +122 °F [–10 °C to +50 °C]
)
Operating Temperature Range: +14 °F to +122 °F
(
–10 °C to +50 °C
)
Emission Modes: A1A
(
CW
)
, A3E
(
AM
)
, J3E
(
LSB, USB
)
, F3E
(
FM
)
, F7W
(
C4FM
)
, F2D
Frequency Steps: 5/10 Hz
(
SSB, CW, & AM
)
, 100 Hz
(
FM, C4FM
)
Antenna Impedance: 50 Ohms, unbalanced
16.7 - 150 Ohms, unbalanced
(
Tuner ON, 1.8 MHz - 30 MHz Amateur
bands
)
25 - 100 Ohms, unbalanced
(
Tuner ON, 50 MHz Amateur band
)
Power Consumption
(
Approx.
)
: Rx
(
no signal
)
1.8 A
Rx
(
signal present
)
2.2 A
Tx 23 A
(
HF/50 MHz 100 W
)
, 15 A
(
144/430 MHz 50 W
)
Supply Voltage: DC 13.8 V ± 15%
(
Negative Ground
)
Dimensions
(
WxHxD
)
: 9.0” x 3.2” x 10.0”
(
229 x 80 x 253 mm
)
Weight
(
Approx.
)
: 9.5 lbs
(
4.3 kg
)
Transmitter
Power Output: 5 - 100 watts
(
2 - 25 watts AM carrier
)
Modulation Types: J3E
(
SSB
)
: Balanced,
A3E
(
AM
)
: Low-Level
(
Early Stage
)
,
F3E
(
FM
)
: Variable Reactance
F7W
(
C4FM
)
: 4-level FSK
Maximum FM Deviation: ±5.0 kHz/±2.5 kHz
Harmonic Radiation: Better than –50 dB
(
1.8 MHz - 30 MHz Amateur bands
)
Better than –63 dB
(
50 MHz Amateur band
)
Better than –60 dB
(
144 MHz, 430 MHz Amateur bands
)
SSB Carrier Suppression: At least 50 dB below peak output
Undesired Sideband Suppression: At least 50 dB below peak output
Bandwidth: 3 kHz
(
LSB/USB
)
, 500 Hz
(
CW
)
, 6 kHz
(
AM
)
, 16 kHz
(
FM/C4FM
)
Audio Response
(
SSB
)
: Not more than –6 dB from 300 to 2700 Hz
Microphone Impedance: 600 Ohms
(
200 to 10 kOhms
)
speciFicaTiOns
… 146 …


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