Axcera-430B Type Acceptance Report
Test Report
February 2004
4-2
4.2 Modulation Characteristics
4.2.1 Video Modulation
The test setup shown in Figure 4-1 was used to adjust the video signal to obtain a white
picture level. Using the Tektronix 1350 demodulator chopper function, the modulation
was accurately measured to be 87.5% while maintaining a depth of modulation at
blanking.
Next, the video was adjusted for modulated staircase and the differential phase and gain
were measured and recorded as follows:
•
Differential phase: +/-1.8
°
•
Differential gain : 2.5%
Figure 4-2 shows the substantially linear transfer characteristics of the transmitter as a
demodulated video waveform.
Figure 4-2. Substantially Linear Transfer Characteristics of the Transmitter as a
Demodulated Video Waveform
