BK PRECISION 2650A Manual 电路图.pdf

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1、v 03042009 Model 2650A/2651 Series 3.3 GHz/8.5 GHz Spectrum Analyzer USER MANUAL RadioFans.CN 收音机爱 好者资料库 i Before Using the Product Please note the following described on the back panel. For safe use: 1) When a bnormal s ound, abnormal s mell or smoke is found, stop us ing the product and remove the

2、 battery and AC adapter. 2) Never handle this product with wet hands to prevent risks of electric shock, fire, or damage. 3) Never use this product under lightning conditions to prevent risks of damage. 4) Never us e any AC a dapter ot her t han s pecified, or it w ill caus e da mage. Connect the po

3、wer cable only to three-terminal outlet for protection from static electricity, otherwise this product or a device under test may be damaged. 5) Never use any battery other than specified, or it may damage this product. Turn off the power and disconnect the AC adapter before removing the battery out

4、 of the battery compartment. 6) Be sure to charge the battery as specified in the instructions in this manual. Moreover, an explosion, fire or smoke may occur if battery is handled improperly. Please read the notes for handling the battery. RadioFans.CN 收音机爱 好者资料库 ii Set clock function The time info

5、rmation is set at Japan standard time. Set the year, month, day and time when the 2650A series is used for the first time. (Refer to “24.4 Setting the clock” for the details.) Quality assurance Warranty If the defect by our responsibility occurs within one year after delivered, it shall be repaired

6、free of charge. However, this warranty does not cover such defect that : 1) is caused by a fire or natural disasters. 2) is caused by inappropriate handling such as dropping while moving the unit delivered. 3) is caused by handling in contradiction to usage or precautions described in the operating

7、manual. 4) is caused by modification or misuse. We will not be responsible for direct or indirect damage caused by use or defect of this product. Refer to the end of this manual for details. Warm-up time Warm up the product for at least ten minutes after turning on the power in order to stabilize th

8、e internal circuit. Precautions for storage 1) Avoid direct sunlight or dust. 2) Store this unit in a place where temperature is between -20 C to 60 C, humidity less than 60 C/70 %RH and variations in temperature and humidity are small. After service Please c ontact us w ithout he sitation i f you h

9、a ve a ny que stions a bout t his product: B f = SPAN / (10 to 50) (corresponding to 0.2 to 1 div) Example: judging a spectrum displayed at 6.92 GHz (setting : center frequency 6.92 GHz and SPAN 500 MHz) 1. Set the center frequency to = 6.94GHz. 2. A spectrum at 6.92 GHz (shifting left by f from 6.9

10、4 GHz) is correct. A spectrum at 6.98 GHz (shifting right by 2f from 6.94 GHz) is spurious. * Additionally, a spurious response mentioned above shifting right by 2f at band 1+ is largest, and other spurious response are about 25 to 50 dB smaller than that. 17. Marker Frequency = (freq. at active mar

11、ker) (freq. at reference marker) Level = (level at active marker) (level at reference marker) 4. By pushing , the marker is erased (marker off). 17.2 Normal Peak Search Menu of normal peak search When is pushed, the following function menu is displayed. 1. When is pushed, the marker moves to the max

12、imum peak position of spectrums. 2. When is pushed, the marker moves to the next highest peak. Fifty or less peaks are available. 3. When is pushed, the function menu is returned to the main menu of marker function. 17.3 Zone Peak Search Menu of normal peak search When is pushed, the following funct

13、ion menu is displayed. RETURN F1 F2 F3 F4 F5 F6 PEAK SEARCH NEXT PEAK F1 F2 F3 F4 F1 F2 F6 F5 36 At the Zone mode, the marker automatically moves to the maximum peak point within the range set beforehand. When entering this mode, the zone is displayed with thin blue shadow in the spectrum display ar

14、ea. The marker moves to maximum level within this zone at each sweep. The center of the zone can be adjusted by pressing The width of the zone can be adjusted by pressing Note: The marker does not move in HOLD. 17.4 Change Unit of Marker Level When is pushed, the unit of the marker level is changed.

15、 If the unit of the reference level is dBm, it can be changed to dBm W. If the unit of the reference level is dBV, dBmV or dBV, it can be changed to dBV, dBmV, dBV V. If the unit of the reference level is dBV/m, it can be changed to dBV/m V/m. If the unit of the reference level is dBA/m, it can be c

16、hanged to dBA/m A/m. Note: “V/M” is only displayed when the electric field strength measurement is selected “A/M” is only displayed when the magnetic field strength measurement is selected Each unit change as described above has their own sub-menu for more unit display options. They are shown below:

17、 W W, mW, W, nW, pW, fW V V, mV, V, nV V/m V/m, mV/m, V/m, nV/m A/m A/m, mA/m, A/m, nA/m 18. Save / Load When is pushed, SAVE/LOAD menu is displayed as follows. F1 F2 F3 F4 F5 F6 RETURN ZONE CENTER WIDTH F1 F2 F6 SAVE / LOAD 37 18.1 Selection of Storage Device 1. When is pushed, the built-in flash m

18、emory is selected as a storage device. When is pushed, the external USB memory is selected as a storage device. * Install the USB memory in USB A- plug on the right side firmly. Refer to the figure below. * Once you disconnect, then reconnect the same or a different USB flash memory drive, the 2650A

19、 series will not automatically recognize the new USB drive. After connecting the drive, you must first press the Save/Load key, followed by F5 key (USB) in order for the 2650A to see the new drive., then proceed as described below. . F1 F2 F3 F4 F5 F6 PRE SET SAVE MODE SELECT LOAD DELETE DEVICE MEM

20、USB PRE SET F4 F5 38 18.2 Save Function When is pushed, SAVE menu is displayed as follows. 1. In this function, the data is stored in the built-in memory or USB memory by CSV format. The data stored in USB memory can be used with a personal computer as a CSV file. “2650A_csvData” folder will automat

21、ically be created and the data will be stored in it as a file. 2. The object to be stored is selected with , or . SPECT: The current spectrum on the screen is stored. PARAM: The setting parameters are stored. BOTH: The spectrum and setting parameters are stored as one file. * The selected key will l

22、ook pushed-in on the display. 3. When is pushed, SAVE is executed. The data is stored based on the file name displayed in the active area (refer to “4. Explanation of screen”). As for the file name, refer to “18.3 About File Name”. Up to 200 files can be stored in the built-in memory. Up to 1000 fil

23、es can be stored in USB memory. 4. Pushing will return to the former menu. 18.3 About File Name 1. The file name is attached to the file stored using this function as follows. LABEL-SP001.csv (1) (2) (3) (4) (1) This is the label entered from the label function. Refer to “24.1 Label function.” Note:

24、 Symbols and spaces are not recognized as a file name. (2) S : The object stored is the spectrum (SPECT). P: The object stored is the setting parameters (PARAM). SP: The object stored is both of spectrum and setting parameters (BOTH). (3) The consecutive three digit number from “000” is automaticall

25、y attached if (1) and (2) are same. (4) This is the extension showing CSV format and is automatically attached. F1 F2 F3 F4 F5 F6 SPECT OBJECT PARAMM BOTH SAVE EXECUTE PRE SET RETURN F1 F1 F2 F3 F4 F6 39 2. If the label is not named, “2650A” will be the first part of the file name instead. For examp

26、le: 2650A_SP001.csv 3. About file name at the time of storage When SAVE is selected, the file name is displayed in the active area following according to the above labeling convention. When SAVE is executed as it is, the data is stored with that file name. If the file exists in the storage device an

27、d is rotated left before SAVE is executed, those file names are displayed one by one. If SAVE is executed with an existing file name displayed, the data is overwritten on it. 18.4 Load Function When is pushed, LOAD menu is displayed as follows. 1. When is rotated right or left, the stored file name

28、is displayed one by one from the specified storage device in the active area as follows. 1) The storage device in which the file is stored. (USB: USB memory, MEM: built-in memory) 2) The file name selected. 3) Number attached to file The files in the specified folder of the storage device are sorted

29、 in alphabetical order, and this shows that number. 2. To search files, press , and the file will be displayed in order of the number attached to it in the active area. The search steps can be adjusted by pressing to search in steps of 10 files at a time or pressing to search in steps of 100 files a

30、t a time. Select it according to the number of stored files. 3. When is pushed, LOAD is executed. * When SPECT is selected, a spectrum waveform is loaded. The setting parameters of loaded spectrum are displayed in the setting parameters display area. Refer to “4. Explanation of screen” for details.

31、F1 F2 F3 F4 F5 F6 RETURN 1 File Search Step 10 100 LOAD EXECUTE DISP CLEAR F2 1) USB : LOAD 2) 2650A_SP012.csv 3) 12 F1 F2 F3 F4 40 * When PARAM is selected, setting parameters are loaded. * When the spectrum is loaded, the 2650A series enters HOLD state and the current spectrum disappears, replacin

32、g it with the loaded spectrum on main display. When is pushed right after, the loaded spectrum and a current spectrum are displayed together. 4. When is pushed, the loaded spectrum can be cleared on display. 18.5 Delete Function When is pushed, DELETE menu is displayed as follows. 1. The file name t

33、o be deleted is selected from the specified device with , and the active area will indicate this name. As for the number of search steps, it is the same as “18.4 Load Function”. 2. When is pushed, DELETE is executed. The file displayed in the active area is deleted at this time. 3. Repeat step 1 and

34、 2 above to delete more than one file. 18.6 Presetting (Initialization) (For 2651, refer to “20. EMI test”) When is pushed, the setting parameters are reset to the preset values as shown below. Items Parameters Center frequency 1 GHz Frequency span 20 MHz Reference level 10 dBm Offset 0.0 dB Impedan

35、ce 50 Sweep time 30 ms Detection mode Sample mode (SMPL) RBW 100 kHz VBW 30 kHz Display scale 10 dB/div F1 F2 F3 F4 F5 F6 RETURN 1 File Search Step 10 100 DELETE EXECUTE HOLD/RUN F5 F3 F4 F6 41 19. Measuring Function When is pushed, the following function menu is displayed. The measuring function ca

36、n be selected as follows. CH POWER - Channel power measurement ACP - Adjacent channel leakage power measurement OBW - Occupied bandwidth measurement E/F ANT - Electric field strength measurement M/F PROBE - Magnetic field strength measurement FREQ COUNT - Frequency counter (factory option) * Once th

37、e measuring function is set, when is pushed, the function menu is directly returned to the last setting of the measuring function. In order to stop the measuring function or to select the other measuring function, push F6 key (MEAS OFF), then the function menu is returned to the main menu of the mea

38、suring function. * Each of the four functions (Channel power, Adjacent channel leakage power, Occupied bandwidth and Frequency counter) and the marker function cannot be used at the same time. When is pushed while each of the four functions is selected, the measuring function will stop. Similarly, w

39、hen the measuring function is selected while using the marker function, the marker function will stop. * Although 501 points can be displayed on the screen, the number of points calculated in the instrument is 1001. 19.1 Channel Power Measuremnt The total power in the specified frequency band is mea

40、sured. Two modes, TOTAL and BAND, are available. TOTAL mode By pushing (MODE), TOTAL mode is selected. The sum of power in the displayed spectrum specified by center frequency and frequency span is measured. F1 F2 F3 F4 F5 F6 FREQ COUNT E / F ANT M / F PROBE OBW CH POWER ACP F1 F2 F3 F4 F5 F6 MEAS M

41、KR F1 MEAS 42 BAND mode By pushing (MODE), BAND mode is selected. The sum of power in the band specified by band center and bandwidth is measured. 19.2 Adjacent Channel Leakage Power Measurement The adjacent channel leakage power is measured as the ratio of power in the range specified by offset fre

42、quency and bandwidth to carrier power. Both leakage power at the upper and lower side are measured. Furthermore, the method for measurement is selected out of three methods based on the classification of definition of carrier power; total power method, reference level method and in-band method. Mode

43、 selection and measurement By pushing (MODE), TOTAL, BAND or PEAK mode is selected. * “ACP TOTAL”, “ACP BAND” or “ACP PK” is displayed in MEAS area on the screen. * “CP BAND” is displayed in MEAS area on the screen. * The measured value and the setting parameter are displayed at the lower part of th

44、e screen. 1. By (BAND ENTER) , the band center is set. 2. By (BAND WIDTH) , the band width is set. Measuring Mode Measured Value Setting parameter F2 F3 * “CP TOTAL” is displayed in MEAS area on the screen. * The measured value is displayed at the lower right corner on the screen. Measuring Mode Mea

45、sured Value F1 F1 F2 43 * The measured value and the setting parameter are displayed at the lower part of the screen. Definition of Reference Carrier for each Mode 1. By (ACP OFFSET) , the offset frequency of adjacent channel is set. * The offset is from the center frequency of the reference carrier

46、. 2. By (ACP WIDTH) , the band width of adjacent channel is set. 3. By (REFERENCE CENTER) , the center frequency of the reference carrier is set. * F4 is only for TOTAL and BAND mode. 4. By (REFERENCE WIDTH) , the band width of reference carrier is set. * F5 is only for BAND mode. Measured value Setting parameter Measuring mode F2 F3 F4 F5 TOTAL (total power method) This is based on the sum of power in the displayed spectrum. The center frequency of the reference carrier is set b