Philips PM 5191 Gebrauchsanleitung Seite 24

1.4.
1.4.1.
1.4.2.
E 1-14
OPERATING PRINCIPLE, Fig. 2 (Block diagram)
General Operating Principle
-— DFS, Digital Frequency Synthesizer, on unit 2
— MODULATOR on unit 1
— PULSE GENERATOR on unit 1
— AMPLIFIER on unit 1
Description of the Block Diagram
DFS
fo=0,1-N-2 793. fe=N- 1074 Hz
PULSE GENERATOR
Only if square wave at the generator output is programmed, the TTL output of the ZERO CROSSING
DETECTOR
is routed to the SQUARE WAVE CONDITIONER by the CONTROL CIRCUITRY. The
TTL OUTPUT STAGE and the SQUARE WAVE
CONDITIONER
are creating the TTL output voltage
of the generator and the primary square wave with accurate amplitude and waveform.