R&S NRP OPS 电路图.pdf

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1、1144.1400.12-05- 1 Test and Measurement Division Operating Manual Power Meter R otherwise injuries or material damage may occur. It is the responsibility of the employer to select suitable personnel for operating the products. 8. Prior to switching on the product, it must be ensured that the nominal

2、 voltage setting on the product matches the nominal voltage of the AC supply network. If a different voltage is to be set, the power fuse of the product may have to be changed accordingly. 9. In the case of products of safety class I with movable power cord and connector, operation is permitted only

3、 on sockets with earthing contact and protective earth connection. 10. Intentionally breaking the protective earth connection either in the feed line or in the product itself is not permitted. Doing so can result in the danger of an electric shock from the product. If extension cords or connector st

4、rips are implemented, they must be checked on a regular basis to ensure that they are safe to use. 11. If the product has no power switch for disconnection from the AC supply, the plug of the connecting cable is regarded as the disconnecting device. In such cases, it must be ensured that the power p

5、lug is easily reachable and accessible at all times (corresponding to the length of connecting cable, approx. 2 m). Functional or electronic switches are not suitable for providing disconnection from the AC supply. If products without power switches are integrated in racks or systems, a disconnectin

6、g device must be provided at the system level. 12. Never use the product if the power cable is damaged. Check the power cable on a regular basis to ensure that it is in proper operating condition. By taking appropriate safety measures and carefully laying the power cable, ensure that the cable canno

7、t be damaged and that no one can be hurt by e.g. tripping over the cable or suffering an electric shock. 13. The product may be operated only from TN/TT supply networks fused with max. 16 A (higher fuse only after consulting with the Rohde doing so can cause fire or electric shocks. 16. For measurem

8、ents in circuits with voltages Vrms 30 V, suitable measures (e.g. appropriate measuring equipment, fusing, current limiting, electrical separation, insulation) should be taken to avoid any hazards. 17. Ensure that the connections with information technology equipment comply with IEC 950/EN 60950. 18

9、. Unless expressly permitted, never remove the cover or any part of the housing while the product is in operation. Doing so will expose circuits and components and can lead to injuries, fire or damage to the product. Safety Instructions 1171.0000.42-03.00 Sheet 4 19. If a product is to be permanentl

10、y installed, the connection between the PE terminal on site and the products PE conductor must be made first before any other connection is made. The product may be installed and connected only by a license electrician. 20. For permanently installed equipment without built-in fuses, circuit breakers

11、 or similar protective devices, the supply circuit must be fused in such a way that suitable protection is provided for users and products. 21. Do not insert any objects into the openings in the housing that are not designed for this purpose. Never pour any liquids onto or into the housing. This can

12、 cause short circuits inside the product and/or electric shocks, fire or injuries. 22. Use suitable overvoltage protection to ensure that no overvoltage (such as that caused by a thunderstorm) can reach the product. Otherwise the operating personnel will be endangered by electric shocks. 23. Rohde b

13、ooting can be re- started by pressing the continue softkey. Switching the meter on/off R all other sections can be worked through with the Thermal Sensors R the up/down cursor keys are used to edit it. Usually, the digit panel also contains a unit softkey which you can use to change the unit wheneve

14、r you want. If you want to make a completely new entry, the whole field can be cleared with the (DEL/1TRIG) key. In the insert mode (indicated by the cursor), you can enter digits and/or letters. Any changes you make to a field can be confirmed with the ( MENU) key. When this key is pressed, the new

15、 value is subjected to a validity check. If the check discovers an error, a warning message is output. You can quit the editor by pressing the (ESC) key; this leaves the old values unchanged. Any warning messages are cleared. ? ?Tip To set the maximum or minimum value permitted for a parameter, firs

16、t move the insertion mark to the left edge of the entry field by using the () key. Then press the () key (several times if necessary) to set the maximum per- missible value or the () key to set the mimimum permis- sible value. Editing fields with direct entry of val- ues The Filter, Range and Trigge

17、r dialog boxes are designed such that you can read the values even when the dialog box is open. If you edit a value in a dialog box using the cursor keys () (), the new value is accepted immediately when you press a key. This feature allows you to quickly assess the effect of editing and to perform

18、interactive adjustment. If you enter a new value with the letter panel (see below), however, the symbol appears above the editing field to indicate that the new value is not accepted until you confirm it with the ( MENU) key. Dialog boxes and their controls R here, max-min Measurement function Auxil

19、iary value symbol Measurement function Max-Min Relative measurement mode ON Max Correction functions Min Duty cycle correction ON Number of measurement values Offset correction ON Noise Twoport correction ON (S-parameter device) Average Value Filter Trigger symbols Averaging filter Trigger Filter si

20、ze with auto-filter (normal mode) or for manual mode Free-running trigger Noise component with auto- filter in Fixed Noise mode Trigger remains OFF Noise ratio exceeded Single-shot mode, trigger ex- pected Other Single-shot mode, measurement over Battery level indicator Trigger source (channel A, B,

21、 C, D) Battery charging Trigger on rising slope Over limit Trigger on falling slope Measurement in progress Measurement stopped R pressing this key once opens the File menu; pressing it a second time loads the Preset setting. The user-defined setups and settings for measurements on mobile radio stan

22、dards can also be loaded from the File menu. Hardkey (PRESET) Fig. 4-1 Setup dialog box Preset ( ) or (PRESET) Changes the R a calibration measurement after switching on the instrument is not necessary and also not planned. However, overload, other damage or extreme operating conditions may cause th

23、e measurement uncertainty to exceed the specified values. The option R exceeding these limits results in an error message. The factory-set default settings depend on the sensor and are in line with the data sheet values. They should be observed in the entire ambient temperature range. If the base un

24、it and the sensors are used only at room temperature, the tolerance limits can be restricted so that any damage to the sensor can be quickly detected. Hardkeys R the fluctuations only completely disappear with more than 3000 periods. It is not useful to make the sampling window wider than actually r

25、equired, since this would increase the noise component of the power sensor. (? Background information, page 4.10). Remote control SENSe1.4:POWer:AVG:APERture? Sampling Rate ( ) If a sensor contains a sampling A/D converter, the sampling rate can be adjusted to prevent aliasing effects for particular

26、 types of modulation signal. Aliasing can occur with some sensors because the sampling frequency is located within the video bandwidth, which means that spectral components of the modulation signal can fall in this frequency range. Changing the sampling rate will make the aliasing effects disappear.

27、 Remote control SENSe1.4:SAMPling? FREQ1 | FREQ2 . Duty Cycle ( ) Using the duty cycle correction, the average power of RF bursts can be calculated from the average power of the whole signal. The average power of the whole signal is divided by the duty cycle of the signal. If thermal power sensors a

28、nd R no external trigger signal is required. The parameter Dropout for detecting the falling edge and the parameters of the Trigger menu (? Trigger settings, page 4.25) are different ways of providing a stable measurement. By using the parameters Excluded from Start and Excluded from End, the start

29、and end of bursts can be excluded from the measurement. This means that signal overshoots can be omitted from measurements, for example. Mode dialog box: Tgate Av, Burst Av. ( ) Fig. 4-12 Mode dialog box, Burst Av mode Defines the end of the burst. Modulation-specific power drops that are shorter th

30、an the set value are ignored. Remote control SENSe1.4:POWer:BURSt:DTOLerance? Dropout ( ) Caution The Dropout parameter must not be longer than the wattless interval between the end of the burst and the start of the next burst. Excluded from Start ( ) This time interval at the beginning of the burst

31、 is excluded from the measurement. Remote control SENSe1.4:TIMing:EXCLude:STOP? from End ( ) This time interval at the end of the burst is excluded from the measurement. Remote control SENSe1.4:TIMing:EXCLude:STARt? ? ?Tip For the most common mobile radio standards, the specified parameters can easi

32、ly be loaded via the Recall Standard dialog box in the File menu (? Loading settings for mobile radio standards, page 4.57). Mode : Burst Av Data acquisition and parameters R thus, the end of the burst cannot be detected until the set time has elapsed after the power has dropped below the trigger th

33、reshold. If the trigger threshold is exceeded again during the dropout time, the process restarts from the beginning. Timing diagram The timing diagram below shows the relation between the following parameters: Trigger threshold and trigger event Trigger event, exclude intervals and measurement inte

34、rval Although the signal frequently falls below the trigger threshold during the burst, an end of the burst is not detected. The reason for this is that these drops are shorter than the set Dropout time. The last falling edge in the burst is detected as the end of the burst since the trigger thresho

35、ld is no longer exceeded during the Dropout time indicated below. Power Time Trigger threshold Dropout Excluded from StartExcluded from End Last falling edge in the burst Trigger event Measurement interval R however, the names can be changed using the table editor. Remote control SENSe1.4:CORRection

36、:FDOTable:SELect? Table ( ) Activates the frequency-dependent offset correction specified in the Table you have selected. Remote control SENSe1.4:CORRection:FDOTable:STATe? ON | OFF Sensor?Offset Data acquisition and parameters R in the remote control mode, additional measurements 5 to 8 can be conf

37、igured (not displayed on screen). The Measurement menu The Measurement menu contains the functions required to configure measurements. ? Selecting a window, page 4.34. ? Selecting a measurement function and the unit, page 4.35. ? Relative measurement, page 4.41. ? Entering the reference value manual

38、ly, page 4.41. ? Limit monitoring, page 4.42. ? Resetting additional information, page 4.40. Fig. 4-32 Measurement menu Selecting a window You can select one of the windows (1 to 4) as and when you want. All Windows and Measurement menu functions act on the selected window. Measurement menu: Window

39、( ) 1 2 3 4 Selects the window whose number is displayed in the menu. If the window is open, this is also indicated by the window s title bar being in inverse video and by the “ shadow” along the window s right and bottom edges. Measurement?Window Measurement - Menu R otherwise both limits of the sc

40、reen will be changed. All trace parts in the center of the screen will then remain unchanged. R only for the R the value of the distribution function is measured. Remote control CALCulate1.8:STATistics:MARKer:POWer:DATA? CALCulate1.8:STATistics:MARKer:RATio:DATA? Result marker: is positioned to a va

41、lue of the distribution (distribution density) function; the power is measured. Remote control CALCulate1.8:STATistics:MARKer:DATA? Gate ( ) Switches over between the four gates and the unsynchronized time interval. This interval is selected as gate 0. Its length is identical with that of the Sampli

42、ng Window for the Cont Av mode (? Continuous average-power measurements, page 4.8). Displaying traces ROUTPut:RECorder1.2:STATe? ON Pass/Fail OUTPut:RECorder1.2:STATe? OFF;OUTPut:TTL1:STATe? ON Window ( ) 1 2 3 4 Specifies the window the output pertains to. Remote control OUTPut:RECorder1.2:FEED? OU

43、TPut:TTL1:FEED? 0 V Equivalent ( ) Display value which corresponds to an output voltage of 0 V. Remote control OUTPut:RECorder1.2:LIMit:LOWer? 3 V Equivalent ( ) Display value which corresponds to an output voltage of 3 V. Remote control OUTPut:RECorder1.2:LIMit:UPPer? Pass ( ) Logic level within th

44、e limits that have been set. The valid range is 0 V to 3.3 V. Remote control OUTPut:TTL1:HVOLtage? Fail ( ) Logic level when there is a limit violation. The valid range is 0 V to 3.3 V. Remote control OUTPut:TTL1:LVOLtage? System?IO R the display is cleared except for a status line at the top of the

45、 screen. Blanking of menu elements that need not be continually updated increases the data processing speed. The display can be reactivated with the SCPI command SYSTem:SPEed NORMal. The backlighting can also be completely switched off with DISPlay:ILLumination OFF. In the remote mode, the menu line

46、 at the upper screen edge is blanked and replaced by the indication Remote Mode. The SCPI error queue can be displayed using the topmost softkey (labelled Error List.). If the LLO character is displayed in the upper status line, the keyboard including (ESC/LOCAL) has been disabled via the LLO comman

47、d. In this case, returning to local mode is only possible with the remote control command GTL or by a power-on reset. Remote Control - Fundamentals R other abbreviations are not allowed. The short form uses the first four characters of the long form. If the fourth character is a vowel and the long f

48、orm consists of more than four characters, only the first three characters are used for the short form. The short form is shown by upper-case characters, and the long form is the entire keyword. Example: STATus:QUEStionable:ENABle 1 and STAT:QUES:ENAB 1 Note: Upper- and lower-case letters are only u

49、sed for identifying the long and short form in the manual; the device itself does not differentiate between the two types of characters. Parameters The parameter must be separated from the header by a white space. If a command contains several parameters, they have to be separated by a comma (,). Some of the commands allow the specification