Electronic Components Datasheet Search |
|
QP1T Datasheet(PDF) 10 Page - Mitel Networks Corporation |
|
QP1T Datasheet(HTML) 10 Page - Mitel Networks Corporation |
10 / 17 page 10 SL2015 e) The difference in level in dB between the fundamentals and the 3rd order products is the IM3 of the device. f) IP3 may be calculated from the above reading as follows: IP3 = RF input level + IM3/2. This level is usually referred to the input. e.g. Assuming a measured IM3 of 44dB, and with an input level of -19dBm, IP3 = 44/2 + -19dBm = +3dBm In a 50 Ω system, this may be converted to dBuV by adding 107 to the value calculated since 0dBm = 107dB µV. i.e. +3dBm = 110dBuV. This is known as the input referred IP3 of the device. If you experience any difficulties with this board, or require further help, please contact Robert Marsh on 01793 518234 or Fred Herman on 01793 518423. The fax number is 01793 518411. The in-band ones are listed below: fd = flo - (2 x f1 - f2) fc = flo - (2 x f2 - f1) fd = 1430MHz - (2 x 950MHz - 951MHz) = 481MHz fc = 1430MHz - (2 x 951MHz - 950MHz) = 478MHz fa fb fc fd fundamentals 3rd order product 3rd order product Measurement of IM3 and IP3 a) Input two signal tones from RF generators. The level of these should be adjusted so that the device sees an input signal level of -19dBm from each tone. Program the local oscillator so that both tones are mixed down to the IF (approx). b) Adjust the AGC so that the device gives an overall conversion gain of +5dB. c) Connect a spectrum analyser to the selected IF output of the device. d) Measure the relative levels of the down converter signals and the 3rd order products (see diag overleaf). Two input signals are used: f1 = 950MHz f2 = 951MHz The local oscillator flo is tuned to 1430MHz. This gives the following at the IF output: fa = 1430MHz - 950MHz = 480MHz fb = 1430MHz - 951MHz = 479MHz Mixing products are also produced in the front end. These are then downconverted by the mixer. |
Similar Part No. - QP1T |
|
Similar Description - QP1T |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.NET |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |