FCC于2016年4月发布了新的数字传输系统(DTS)测试指导文件KDB 558074 D01
DTS Meas Guidance v03r05,替代旧版KDB 558074 D01 DTS Meas Guidance v03r04。
新旧版本的差异:
KDB558074-v030r04
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KDB558074-v030r05
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不同点
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第2.0章节
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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.
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新版本删除积分法测试The maximum peak conducted output
power
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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.
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新版本特别提及99%OBW更为精准
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第9.0章节
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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.
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新版本删除power meter 说明
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Change Notice
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04/08/2016: 558074 D01 DTS Meas Guidance v03r04
changed to 558074 D01 DTS Meas Guidance v03r05Updated to note :
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.
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KDB中新版本的变化,总的来说在测试或者报告中基本上没什么变化,报告中更行版本号即可!
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即,第2.0章节中描述最大传导功率(The maximum peak conducted output power)删除旧版特别提及的无法满足peak detector,则可以用积分法替代。
第2.0章节中提供最大传导功率average power需要计算其OBW,新版本中提出用99%OBW来计算更为精确。
第9.0章节旧版特别说明power meter使用条件必须为meter 的视频带宽大于等于DTS 设备的带宽,而已要求meter响应速度越快越好,新版本已删除这特别说明。
科普:KDB 558074是什么?
KDB
558074是FCC15.247法规下定义的数字传输系统(DTS)的测试方法指导文件,它适用于工作在902-928 MHz,2400-2483.5 MHz和5725-5850 MHz的数字传输系统,不适用于跳频系统。
科普:KDB 558074指导什么内容?
KDB
558074规范了以下测试项的测试方法:
No.
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Description
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FCC Part
No.
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1
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Output Power
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15.247(b)
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2
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DTS Bandwidth
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15.247(a)
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3
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Conducted Spurious Emission
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15.247(d)
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4
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Radiated Spurious Emission
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15.247(d)
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5
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Band Edge
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15.247(d)
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6
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Power spectral density (PSD)
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15.247(e)
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来源:BALUN原创 作者:郑木义 责任编辑:芭拉小编
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