數(shù)字傳輸系統(tǒng)(DTS)測(cè)試指導(dǎo)文件(KDB 558074)變更
FCC于2016年4月發(fā)布了新的數(shù)字傳輸系統(tǒng)(DTS)測(cè)試指導(dǎo)文件KDB 558074 D01 DTS Meas Guidance v03r05,替代舊版KDB 558074 D01 DTS Meas Guidance v03r04。
新舊版本的差異:
KDB550874-v030r04 | KDB550874-v030r05 |
不同點(diǎn) | |
第2.0章節(jié) | |
The maximum peak conducted output power is defined as the maximum power level measured with a peak detector using a filter with width and shape of which is sufficient to accept the signal bandwidth.However, when a filter with adequate width is not available, an integrated method utilizing a peak detector is acceptable. | 新版本刪除積分法測(cè)試The maximum peak conducted output power |
The procedures provided herein for measuring the maximum conducted (average) output power assume the use of the occupied bandwidth (OBW) as the reference for power integration. See ANSI C63.10 for guidance pertaining to measuring the OBW. Either of the two methods specified in C63.10 are acceptable, but the methodology for measuring the 99% OBW is the most accurate for noise-like emissions and thus represents the preferred method. | 新版本特別提及99%OBW更為精準(zhǔn) |
第9.0章節(jié) | |
The maximum peak conducted output power may be measured using a broadband peak RF power meter. The power meter shall have a video bandwidth that is greater than or equal to the DTS bandwidth and shall utilize a fast-responding diode detector. | 新版本刪除power meter 說明 |
Change Notice | |
04/08/2016: 558074 D01 DTS Meas Guidance v03r04 changed to 558074 D01 DTS Meas Guidance v03r05Updated to note : <span background:yellow;"="" style="font-size: 15px">the new rules for devices operating in 5725 – 5850 MHz band and to implement editorial changes made apparent through KDB inquiries, to include the deletion of a statement regarding the use of integration peak power measurement procedures that was rendered obsolete by previous changes implemented on 06/06/2014. | KDB中新版本的變化,總的來說在測(cè)試或者報(bào)告中基本上沒什么變化,報(bào)告中更行版本號(hào)即可!即,第2.0章節(jié)中描述最大傳導(dǎo)功率(The maximum peak conducted output power)刪除舊版特別提及的無法滿足peak detector,則可以用積分法替代。 |
第2.0章節(jié)中提供最大傳導(dǎo)功率average power需要計(jì)算其OBW,新版本中提出用99%OBW來計(jì)算更為精確。
第9.0章節(jié)舊版特別說明power meter使用條件必須為meter 的視頻帶寬大于等于DTS 設(shè)備的帶寬,而已要求meter響應(yīng)速度越快越好,新版本已刪除這特別說明。
科普:KDB 558074是什么?
KDB 558074是FCC15.247法規(guī)下定義的數(shù)字傳輸系統(tǒng)(DTS)的測(cè)試方法指導(dǎo)文件,它適用于工作在902-928 MHz,2400-2483.5 MHz和5725-5850 MHz的數(shù)字傳輸系統(tǒng),不適用于跳頻系統(tǒng)。
科普:KDB 558074指導(dǎo)什么內(nèi)容?
KDB 558074規(guī)范了以下測(cè)試項(xiàng)的測(cè)試方法:
No. | Description | FCC Part No. |
1 | Output Power | 15.247(b) |
2 | DTS Bandwidth | 15.247(a) |
3 | Conducted Spurious Emission | 15.247(d) |
4 | Radiated Spurious Emission | 15.247(d) |
5 | Band Edge | 15.247(d) |
6 | Power spectral density (PSD) | 15.247(e) |
原文轉(zhuǎn)自:BALUN原創(chuàng) 作者:鄭木義
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