Equipment: DUT, Television Monitor, Digital Stream Player (Analyzer), Sarnoff SD Test Stream (SCB-CABSD v.1.1), Sarnoff HD Test Streams (SCB-CABHD-VTT), QAM Modulator, Head End Feed
Note: Contact Sarnoff for Sarnoff HD Test Streams.
Setup: Connect Host Device (DUT) in one of the two following ways:
Procedure: Direct Test Connection
Step#
Procedure
Pass/Fail
PICS
Connect DUT to a Head End system, ensure an initialization has completed, and a channel map has been acquired by the DUT and then remove from the Head End system.
N/A
Connect the Stream Player (containing the Sarnoff test stream) to a QAM Modulator. Bring the stream player and QAM Modulator up to a stable operating state.
N/A
Tune the QAM Modulator to a comparable frequency of the channel map loaded into the DUT. Ensure all programs within the selected stream frequency are “clear” channels, (not encrypted). Initially set QAM modulator for 64 QAM, change to 256QAMfor the second part of the test.
N/A
Program the QAM Modulator in the appropriate mode, to “pass through” the desired digital test stream from the Stream Player.
N/A
Connect the RF output of the QAM Modulator to the RF input of the DUT. Ensure output levels are set and attenuator pads added for the desired RF level into the DUT. Connect the RF output of the DUT (or audio/video) to a television monitor.
N/A
Tune the DUT to a virtual channel for program one, corresponding to the selected frequency stream.
N/A
Follow “Testing” procedure for stream detail.
N/A
Procedure: System Test Connection
Step#
Procedure
Pass/Fail
PICS
Connect the RF input of the DUT to the appropriate Head End system that contains the designated Stream Player QAM channel, (frequency). Connect the RF output of the DUT (or audio/video) to a television monitor.
N/A
Ensure Stream Player (containing the Sarnoff digital test stream) is properly connected to the desired QAM Modulator input. Initially set QAM modulator for 64 QAM, change to 256QAMfor the second part of the test.
N/A
Turn the Stream Player and all associated equipment on, and bring to a stable operating state. Turn on the DUT and bring to a stable operating state.
N/A
Follow “Testing” procedure for stream detail.
N/A
Choice what you will be testing:
Step#
Summary
Pass/Fail
PICS
If an analog component video output is present on the DUT, it SHALL comply with [CEA-770.3-C] and employ three RCA Phono jack connectors. Connect the video output to display and run the test stream for video output compliance.
If an HD analog component video interface is present on DUT (as with a HD set-top), verify user controlled selection switch to HD output format with the chosen display. Connect the component video interface to display and run the test stream for video output compliance.
N/A
Sarnoff Test Stream Notes:
The test will operate according to the test grid listed in Table 6.1-3 Compression FormatConstraints of this document. The grid is divided into test “segment”. Each segment will have start and stop packet counts, (or times). The Stream Player may be place in the “loop mode”, allowing the DUT sufficient time to acquire the test stream signal, and display to the television monitor.
Each test begins with a one-second-title screen describing the format under test. The title screen contains two moving elements to indicate that the DUT is functioning: An orange block moving from left to right in a small black box and light-gray bars moving from left to right on the top and bottom of the screen.
The title screen is followed by an approximately three-second test sequence containing several moving elements: Two green vertical bars moving smoothly from left to right, two yellow horizontal bars moving from top to bottom, a large black region that fills with white blocks, and a small box in each corner of the screen which changes slowly from black to white.
N/A
Each test repeats three times, making one test segment. Please ensure that you are the beginning of the stream before beginning this test.
Dead time at the end of the loop may appear as video freezes or blank screens, due to the stream player ‘rewinding’ to the beginning.
N/A
Table 6.1-1 - Digital Video Compression Test Table (Sarnoff SD Formats)
Program
Test Segment
H-size
V-size
Aspect
Prog
Fr-rate
Start Packet
Stop Packet
Pass/Fail
Comments
1
1
720
480
3
1
1
PID 0x31
2
720
480
2
1
1
Ch 22-1
3
704
480
3
1
1
4
704
480
2
1
1
5
640
480
1
1
1
6
640
480
2
1
1
7
544
480
2
1
1
8
528
480
2
1
1
9
352
480
2
1
1
2
1
720
480
3
1
2
PID 0x41
2
720
480
2
1
2
Ch 22-2
3
704
480
3
1
2
4
704
480
2
1
2
5
640
480
1
1
2
6
640
480
2
1
2
3
1
720
480
3
1
4
PID 0x51
2
720
480
3
0
4
Ch 22-3
3
720
480
2
1
4
4
720
480
2
0
4
5
704
480
3
1
4
6
704
480
3
0
4
7
704
480
2
1
4
8
704
480
2
0
4
4
1
640
480
1
1
4
PID 0x61
2
640
480
1
0
4
Ch 22-4
3
640
480
2
1
4
4
640
480
2
0
4
5
544
480
2
0
4
6
528
480
2
0
4
7
352
480
2
0
4
5
1
720
480
3
1
5
PID 0x71
2
720
480
3
0
5
Ch 22-5
3
720
480
2
1
5
4
720
480
2
0
5
5
704
480
3
1
5
6
704
480
3
0
5
7
704
480
2
1
5
8
704
480
2
0
5
6
1
640
480
1
1
5
PID 0x81
2
640
480
1
0
5
Ch 22-6
3
640
480
2
1
5
4
640
480
2
0
5
Table 6.1-2 - Digital Video Compression Test Table (Sarnoff HD Formats)
Play each segment of the test. Verify Pass/Fail status and comments of the output display of the DUT in the “Digital Video Compression Test Tables” for each segment.
Verify the DUT decodes all “Compression Format Constraints” from Table 6.1-3 Compression Format Constraints
HDST.20
If DUT is UHMS (STB), verify it decodes MPEG-2 video with resolutions shown in Table 6.1-3 Compression Format Constraints
HDST.11
HNETdig_vid.4
Set the QAM Modulator set for 256 QAM.
N/A
Play each segment of the test. Verify Pass/Fail status and comments of the output display of the DUT in the “Digital Video Compression Test Tables” for each segment.
HNETdig_vid.7
HSTCCP.7
Connect the three RCA Phono jack connectors to the analog component output.
N/A
Verify that the video was converted to the selected SD output format on the analog output interface.
HDST.13
Connect the Y’, Pb’, Pr’ component format connectors and test the HD analog interface.
N/A
Verify the video was converted to the selected HD output format on the HD Analog Interface.
HDST.11
HNETdig_vid.4
6.1.2.2MPEG-2 Maximum Rate Single Transport Stream Test
The DUT MPEG-2 decoder needs to support a variable bit rate input with peak rates up to the maximum rate allowed by MPEG-2 Main Profile @ High Level. The maximum available with QAM-256 is 38.81070 Mbps.)
Current CW testing dates list test streams and are available through CableLabs DocZone listed under the current CW submission. (Requires NDA agreement)
ATP test file is ZonePlate 388 Test Transport Stream.
Note: The above reference descriptor file shows SPSTS and data rate. Equipment:
Tune to the “38.8” test stream by whatever means you choose.
Note:
This test stream is available on one of the headend channel maps.
(Reference Head-end channel map and tune the Host to “38.8” test stream).
N/A
Verify proper reception.
(For digital signals: This means picture and sound with no impairments lower than a rating of 4 on the ITU-R BT.500 scale. ("Perceptible, but not annoying").
