Axcera-430B Type Acceptance Report
Test Report
February 2004
4-3
4.2.2 Video Envelope Delay
Using the test setup in Figure 4-1, the envelope delay was measured and the data
recorded as shown in Table 4-1. A sinx/x test pattern was used.
Table 4-1. Envelope Delay Measurements
VIDEO FREQUENCY
(kHz)
DELAY (ns)
200
-1
500
+41
1000
+11
1500
+5
2000
-2
2500
+16
3000
+49
3500
- 135
3580
- 158
4000
- 350
4180
- 428
4.2.3 Video Noise
The test setup in Figure 4-1 was used to observe
the video on the waveform monitor.
The video was set for 1 volt peak-to-peak. The noise was observed to be less than 8 mV
peak-to-peak on one step of the 5-step staircase. This is a video-to-peak noise ratio of
125=42 dB or, using the standard conversion factor of peak to RMS noise of 14 dB,
about 64 dB S:N rms.
Observing the video at the field rate on the waveform monitor, the low-frequency noise
(AC line related) was observed to be approximately 6 mv peak-to-peak or 2.1 mv rms
(using the sinusoidal conversion of AC peak-to-peak to rms for a low-frequency S:N rms
of about 62 dB).
4.2.4 Video Frequency Response
The test setup shown in Figure 4-1 was used to record the detected video frequency
response; the results are shown in Table 4-2 and Figure 4-3.
Note: For this test, the video signal was adjusted to provide a 50% average
picture level and the video sweep signal level was set to cover the range from
black to white picture.
