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Weather Facsimile Receiver JAX-91

Weather Facsimile Receiver JAX-91

The JAX-91 Weather Facsimile Receiver is the paper base recording system, It is easy to check by the automatic printout function. On top of it, a new function characterizes that as a suitable Frequency is automatically selected on checking wave propagation, Frequency selection and timer operation in the area of the same Broadcasting station are enhanced.

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Description

Outline

TA Reliable and Flexible Operation
15-Inch Wide Weather Facsimile

Flexible Operation

The JAX-91 can operate in four start and stop modes for transmitted patterns from broadcast stations, purposes of facsimile receiving and recording status:

  • Fully automatic :
    All operations from start to stop are controlled by the remote control signal under WMO Recommendation, ensuring error-free recording.
  • Semi-automatic :
    Automatic phasing and start by manually setting an index of cooperation and a scan speed.
  • Manual :
    Start and stop, and phasing are manually made, but in a unique method enabling momentary phasing.
  • Programmed :
    With the internal timer, the times of start and stop, start and stop modes, station frequencies, half-tone on/off are programmable. When combined with the fully automatic mode, unattended, error-free operation is available.

Fine Half-Tone Recording

Pictures of clouds can be recorded in 16-level half-tone gradation by dithering. This digital method ensures high-resolution recording to represent even very fine lines so clearly that it is compared to analog pictures.

Synthesized Receiver

The built-in synthesized receiver is capable of setting any receiving frequency from ten-key pad and presetting up to 90 spot frequencies in the memory. This feature is very effective when receiving any new broadcast frequency and changing the station frequency by manually or automatically.

Printout of Frequencies and Program Lists

Up to 90 channels of memory frequencies and up to 15 channels of program lists can be printed out on the recording paper.

High Quality Pictures

The effect of radio interference such as multi-pass echo and fading can be detected and indicated (RCV MONI TOR) for effective frequency selection and for judge ment of recording quality.

Specifications

Facsimile
Recorder		Recording systemSolid-state scanning by thermal head
Recording paperThermosensitive
400mm(W) × 100m(L)/roll
Effective scanning line384mm
Index of cooperation576 and 288
Scanning speed60, 90, 120, 180 and 240 spm
Scanning densityApprox. 4.7 lines/mm(576)or approx. 2.4
lines/mm(288)
Scanning resolution8 dots/mm
PhasingAutomatic/manual
Tuning indicatorLED indicator with radio interference detector
Signal input1900Hz ± 400Hz, 600 ohm
Start and stop modes
  1. Automatic
    All actuation is performed automatically.
  2. Semi-automatic
    The IOC and scan speed are manually selected and Phase matching recording and stop are automatically Controlled.
  3. Manual
    All the operations are manually preset.
  4. Program
    The operations sre programmed using the Internal timer.
Synthesized
Receiver		Receiving systemDouble superheterodyne with PLL frequency synthesizer
Mode of receptionF3C
Frequency rangeLF/80kHz – 160kHz
HF/2MHz – 24.9999MHz
Frequency display6-digit LED (10MHz to100Hz digits)
Frequency settingDirect selection from ten keys
Frequency memoryUp to 90 spot frequencies presettable from ten-key pad
Frequency bandsAutomatically selectable from 5 bande
SensitivityLF/10µV(+20dBµ)or less
HF/2µV(+6dBµ)or less
for antenna input to obtain the output of
-5dBm at 20dB S/N
Image rejection ratio70dB or more
Signal selectivity6dB down 2.4kHz to 3.0kHz
60dB down 6kHz or less
66dB down 10kHz or less
ISB receiving(Δf)By the use of UP/DOWN switch
Signal output0dBm at 600 ohm
Output frequency1900Hz ± 400Hz
Programming
Functions		Number of programs15 programs
Contents of memoryTimes of recording start and stop, receiving frequency, fully automatic/semiautomatic mode, IOC, scan speed and half-tone on/off
Storing methodKeying from ten-key pad and fuction keys
GeneralPower supply80 – 132VAC or 160 – 246VAC, 50/60Hz,
single-phase.
Power consumption130VA or less

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Weather Facsimile Receiver JAX-91

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