Philips PM5645 Teletext Test Generator (Philips PM 5645)
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• Complete 4-page teletext generator.
• Transmission of 1, 10 or 100 pages per magazine, selectable from front panel.
• Adjustable eye - height of data signal with two pre-set positions.
• Adjustable white noise as well as co-channel sine wave interference available.

The PM 5645 Teletext Test Generator is a precision instrument designed for testing tele­text decoders,
TV receivers with teletext decoder, as well as any equipment or part of a TV + teletext transmission system.
The instrument is self - contained in that it consists of a sync pulse generator (SPG),
a full field video generator (cross - hatch) and a tele­text generator with distortion possibilities.

The teletext part has the following key facilities:
• 8 selectable magazines.
• Magazine length of 1,10 and 100 pages.
• 4 pages
• Eye - height reduction by echoes, co-channel interference and noise.

The PM 5645 is recommended for use in production and professional repair plants for testing, calibrating and evaluating TV receivers/ monitors with teletext facilities. In the transmis­sion path, in particular at transmitter stations, the PM 5645 is very useful for testing of the degradation of the decoding margin as a result of incorrect amplitude and group delay response.

Original Operation & Service Manual.