Furuno FAX-408 - Manual (Page 24)

1. OPERATION
14
1.14 Operation with an External Receiver
When the receive signal is particularly weak or the internal receiver is producing only blurred
recordings, you may wish to receive facsimile broadcasts with an external receiver.
1.14.1 Enabling, disabling external receiver use
1. Press the PRG key followed by the 1 key.
2. Press the 1 key to use the internal receiver, or press the 2 key to use an external receiver.
3. Press the E key.
1.14.2 Operation
Beat adjustment
When using an external receiver whose beat frequency is adjustable within a range of ±2 kHz or
more by means of a beat knob, set the frequency dial so the deflection of the receiver’s S-meter
is maximum, and adjust the beat knob so that the center LED of the tuning indicator of this unit is
lit. When a signal from a station with ISB communication (U.S. Naval Station Guam, Pearl Harbor,
San Francisco, etc.) is received, sometimes an adjustment of the frequency is necessary, with a
variable condenser, because the frequency may shift from the nominal frequency of the station by
±2 kHz.
Bandwidth
Increase bandwidth when noise is few, and lower bandwidth by about 1 kHz when noise is great.
Recording
Set up for recording referring to paragraph 1.6 (automatic) or paragraph 1.7 (manual). For reverse
reception, set the mode on the external receiver to BFO (Beat Frequency Oscillator), or switch
between LSB (Lower Sideband) and USB (Upper Sideband).
AF IN : INT
1-INT 2-EXT