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EXEMPLE DU FORMAT ITU-TS TEST SHEET N°1 (SLEREXE LETTER)
THE SLEREXE COMPANY LIMITED
Our Ref. 350/PJC/EAC
Dr. P.N. Cundall,
Mining Surveys Ltd.,
Holroyd Road,
Reading,
Berks.
Dear Pete,
Permit me to introduce you to the facility of facsimile transmission.
In facsimile a photocell is caused to perform a raster scan over the subject copy.
The variations of print density on the document cause the photocell to generate an analogous electrical
video signal. This signal is used to modulate a carrier, which is transmitted to a remote destination
over a radio or cable communications link.
At the remote terminal, demodulation reconstructs the video signal, which is used to modulate
the density of print produced by a printing device. This device is scanning in a raster scan
synchronised with that at the transmitting terminal. As a result, a facsimile copy of the subject
document is produced.
Probably you have uses for this facility in your organisation.
50
SAPORS LANE - BOOLE - DORSET - BH 25 8 ER
TELEPHONE BOOLE (94513) 51617 - TELEX 123456
Yours sincerely,
P.J. CROSS
Group Leader - Facsimile Research
STANDARD FORM
CCITT R1
4th April, 1984
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