Uni-Directional Digital Cable Products Supporting m-card m-udcp device Acceptance Test Plan tp-atp-m-udcp-i05-20080304 issued notice This Test Plan document is furnished by Cable Television Laboratories, Inc

FAT Channel Micro-reflection Test

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3.1.5FAT Channel Phase Noise Tolerance

3.1.4FAT Channel Micro-reflection Test

This test fulfills band pass ripple, group delay and static ghost impairments.

Equipment: HP11759D Ghost Simulator (or TAS or Rhode and Schwarz SFQ.) 256QAM source, Spectrum analyzer, Analog NTSC source.

Procedure:

Step#	Procedure	Pass/Fail	PICS
	Set up the ghost simulator as described in the next steps.	N/A
	Set NTSC signal on a mid channel at 0 dBmV	N/A
	Set the ghost generator primary path for 0dB attenuation, 0 phase, 0 delay, LO oscillator to 207 MHz at +10 dBm	N/A
	Verify proper video reception on all tuners.		MHost.6
	Verify Proper reception with the ghost generator secondary path Set to Phase, -10dB @ 0.5 uSec, 0 degrees referenced to RF channel center freq. (NTSC)		HFATrf.26 HFATrf.28 HFATrf.29 HFATrf.32
	Verify Proper reception with the ghost generator secondary path Set to Phase, -15dB @ 1 uSec, 0 degrees referenced to RF channel center freq. (NTSC)		HFATrf.26 HFATrf.28 HFATrf.29 HFATrf.32
	Verify Proper reception with the ghost generator secondary path Set to Phase -20dB @ 1.5 uSec, 0 degrees referenced to RF channel center freq. (NTSC)		HFATrf.26 HFATrf.28 HFATrf.29 HFATrf.32
	Verify Proper reception with the ghost generator secondary path Set to Phase-30dB @ 4.5 uSec, 0 degrees referenced to RF channel center freq. (NTSC)		HFATrf.26 HFATrf.28 HFATrf.29 HFATrf.32
	Replace NTSC source with 256QAM signal on mid channel at 0 dBmV.	N/A
	Verify Proper reception with the ghost generator secondary path Set to Phase, -10dB @ 0.5 uSec, 0 degrees referenced to RF channel center freq. (256QAM)		HFATrf.26 HFATrf.28 HFATrf.29 HFATrf.32
	Verify Proper reception with the ghost generator secondary path Set to Phase, -15dB @ 1 uSec, 0 degrees referenced to RF channel center freq. (256QAM)		HFATrf.26 HFATrf.28 HFATrf.29 HFATrf.32
	Verify Proper reception with the ghost generator secondary path Set to Phase -20dB @ 1.5 uSec, 0 degrees referenced to RF channel center freq. (256QAM)		HFATrf.26 HFATrf.28 HFATrf.29 HFATrf.32
	Verify Proper reception with the ghost generator secondary path Set to Phase -30dB @ 4.5 uSec, 0 degrees referenced to RF channel center freq. (256QAM)		HFATrf.26 HFATrf.28 HFATrf.29 HFATrf.32

Note: 256QAM modulation will represent the worst case scenario for this test. A micro-reflection of –10 dB @ 0.5 uSec is required in order to meet the 250 nSec group delay specification

3.1.5FAT Channel Phase Noise Tolerance

This test verifies operation of QAM signals under phase noise conditions

Equipment: HP model #8675A FM signal generator, (NoiseCom model #7102) Audio white noise source, passive double balanced mixer (ex. Mini circuits ZFM 15), 256QAM source at 150 MHz, spectrum analyzer

Procedure:

Step#	Procedure	Pass/Fail	PICS
	Set the FM signal generator to 63MHz at +10dBm.	N/A
	Connect the audio noise source to FM input on the signal generator.	N/A
	Connect signal generator to spectrum analyzer.	N/A
	Set Spectrum Analyzer freq. To 63 MHz, 50kHz span, resolution BW to 1 kHz.	N/A
	Set two markers, first marker @ PEAK, then press the marker delta soft key to set second marker @ 10 KHz below PEAK marker.	N/A
	Adjust FM deviation of the signal generator so that spectrum analyzers 10 kHz offset measures –56dBc. Video averaging “on” is suggested to obtain a stable reading on spectrum analyzer. (Alternate: QAM source at IF, generator at 257 MHz)	N/A
	This set up initializes phase noise at –86dBc per Hz at 10 kHz offset. 30dB correction factor that corresponds to1 kHz resolution bandwidth.	N/A
	Connect signal generator output to mixer L port.	N/A
	Connect 256QAM signal to mixer I port at +6 dBmV.	N/A
	Verify that the signal level output is 0dBmV. Connect mixer output to DUT input.	N/A
	Tune DUT to channel 13.	N/A
	Verify proper reception.		HFATrf.27
	Verify proper reception on all additional tuners.		MHost.6

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