Specifications

DTT 7685x
SBU Technology – Tuners ATSC half NIM with Ch 3 / 4 modulator
20 Apr 2007
Preliminary Specification Page 20 / 29
10.9 Reliability Test Requirement
1 Initial value measurement and after test measurement shall be done at standard
conditions stated in Section 6.
2 Measurement or check shall be done at the interval of 0 hour (initial), 96H, 168H, 300H
and 500H.
3 For test items 10.1, 10.2, 10.3 & 10.8, the tested units shall meet the following after
duration of 96 hours, (Data compared with initial value).
- Unit is functional:
Frequency synthesizer is tunable on all channels for tuner as specified in section 7.1
and there is no visible defect in the received picture.
- Tuner Performance: Max.
a) Change of Power Gain 3dB
b) Change of tilt (overall curve) 3dB
4 For all test items stated in this section, measurement shall be done to check whether
the unit is functional (per item 3 definition) at each interval hour as specified in item 2.
5 For test item 10.4, measurement shall be done to check whether the unit is functional
(per item 3 definition) at 50, 100, 150 & 200 cycles.
6 For test items 6 & 7, unit shall be functional (per item 3 definition) after test.