62chaokai wrote:
鄰居說腳踏車便宜就好，千元內的就很好騎乘了，另一鄰居卻是花了數萬又數萬購買腳踏車.....，只是個選擇問題，不同見解的人、不同能力、不同看法的人產生不同的選擇。
irs wrote:
但, 重點是, 這種高檔貨卻是您"不建議"的呀!...(恕刪)
62chaokai wrote:
標準和規範的解釋
1.2 Specification of criteria
In accordance with EIA Engineering Publication, EP-7B, two categories of criteria are specified;
mandatory and advisory. The mandatory requirements are designated by the word “shall”; advisory
requirements are designated by the words “should”, “may” or “desirable” which are used interchangeably in this Standard.
4.5 Stranded conductor cable
This clause contains the transmission requirements for the bulk cable used to construct patch,
equipment, and work area cords. (下略)4.5.1 Mechanical, 4.5.2 Transmission, 4.5.3 Return loss 4.5.4, Insertion loss, 4.5.5 Performance marking
6.3 Mechanical
Cables used to construct patch, work area, and equipment cords should have stranded conductors
and shall meet the requirements of clause 4.5. Stranded conductor cable may be used to increase
flexibility of cords. Cables used for patch cords shall meet the conductor size and color coding
specified in clauses 6.3.1 and 6.3.2, respectively. Twisted-pair conductor lay lengths for 24 AWG or larger stranded conductors shall not exceed 15 mm (0.6 in).
irs wrote:
把迷信剷掉可能比名詞解釋要來的重要的多....(恕刪)
irs wrote:
簡單的來說, stranded conductor 僅只是為了 flexibility 的選擇性建議, 如果選用這種 patch cord 則"強制"必須符合一定的電器特性才能使用.
而已目前新的規定來說, 對於線徑的要求已經放棄, 由於合金技術的進步,
irs wrote:
許多使用 solid conductor 同樣能達到相當好的 flexibility, 而且具備更好的電器特性,..(恕刪
irs wrote:
其實就看這三段大概就清楚為什麼我認為這種事情只是迷信, 僅只是來自於對於"標準"的誤解而已...(恕刪)
wayne6955 wrote:
你所謂"現實狀況"，就是個人的一種選擇。
以一句現實狀況要來打翻"標準"，有點.....
我想發文者只是想告訴大家可以依循的 tia/eia 標準，看了後讓大家有個依據，是不是要依循就是種個人的選擇
wayne6955 wrote:
這回文語氣真是強！大家純粹討論，沒必要這樣吧，和氣和氣。
每個人願意分享出其專業，分享出知識都是好事一樁，讓大家可以多見識些多學習些，感謝大家。
