BIRD 3129 BPM Broadcast Power Monitor and Display (2005) 电路图.pdf

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1、INSTRUCTION BOOK BROADCAST POWER MONITOR SERIES BPM AND MODEL 3129 BPM DISPLAY Bird Electronic Corporation 30303 Aurora Road Cleveland (Solon), Ohio 44139 Sales i.e., from transmitter to antenna CAUTION The 3129 parallel port should only be used to power the BPM. Do not connect anything else to the

2、3129. WARNING Leaking RF energy is a potential health hazard. Never attempt to connect or disconnect equipment from the transmission line while RF power is being applied. Severe burns, electrical shock, or death can occur. Installation 13 “QC” Connector Use 50 ohm coaxial cable such as RG-218/U or -

3、220/U (-17A or -19A), appropriate for the frequency and power level of operation. Use a cable connector which will mate with the one on the BPM7. Swivel Flanged Connector To couple the swivel flange with a flanged RF transmission line, use an appropriate coupling kit. ?Insert the center bullet and p

4、ush it in until it is fully seated. ?Connect the coaxial input in a straight line and push carefully on the center conductor to close. ?NOTE: The swivel flange on the load makes connection independent of the orientation of the fixed flange on the coaxial input outer conductor. ?Insert the bolt sets

5、and tighten evenly all around to transmission line manufacturers recommended torque. Use all of the bolts. Unflanged Connector To couple the unflanged connector with an unflanged RF line, use an appropriate coupling kit. ?Insert the center bullet and bottom it on the midpoint nibs. ?Position the out

6、er sleeve, with clamping bands, over the input connector. ?Set the transmission line snugly against the coupling stops. ?Position the clamping bands evenly about 3/4” from the ends of the sleeve. ?Tighten the clamping bands. Figure 5 BPM Direction Bird BPM Series Broadcast Power Monitor 14 RS-232 Po

7、rt Setup The RS-232 port is configured for 9600 baud, 8 data bits, 1 stop bit and no parity. This configuration is fixed in the firmware and cannot be modified. Operate the serial interface as follows: ?Connect the BPM or BPM Display to the computers serial port with a DB-9 cable. Do not use a null

8、modem adapter. The port is configurable from within the PCTool software. ?To use the Bird PCTool software, install it on the computer and start the application. Refer to “PCTool Software” on page 16 for information about using the program. ?To use a terminal program, configure it for 9600 baud, 8 da

9、ta bits, 1 stop bit, no parity, and no handshake. Set the preferences so that echo is off and line feeds are not appended to output transmission. The commands available are detailed in “Terminal Commands” on page 20. PCTool Installation Computer Require- ments The Bird PCTool software will run on an

10、y computer running Windows NT or Windows 95/98/2000. To install and run the program, your computer system must meet or exceed the requirements listed below: 486 or better CPU (66 MHz or better recommended) 1 MB of free memory Hard Disk Drive CD-ROM Drive Follow the instructions on the CD provided to

11、 install the software. 15 Chapter 4Operating Instructions A description of all controls and indicators on the BPM, BPM Display, and PCTool is provided in this chapter. Read and become familiar with the following instructions before operating the unit. WarmupFor best results, allow the Bird Broadcast

12、 Power Monitor to stabilize for at least one hour after initially applying RF power, and for at least thirty minutes when adjusting power levels. ElementsBPM elements and line sections are carefully selected for accuracy. Use of BPM elements other than the ones on this unit may cause measurement err

13、ors. Do not remove the elements. BPM Controls There are two indicators and one control on the BPM: Operation/Test LED: Lights when the unit is powered. Alarm LED: Lights when an alarm has been triggered. Reset Switch: Press to reset an alarm. If the alarm trigger condition is still present, the alar

14、m will reactivate. Bird BPM Series Broadcast Power Monitor 16 PCTool Software Main ScreenThe PCTool communicates with and configures the remote BPM. It displays forward and reverse power along with VSWR, return loss, match efficiency and transmitted power. Figure 6 shows a sample of the display scre

15、en. Refer to the software “Help” file for specific instructions. The main screen has two buttons at the bottom, “Trigger” and “Continuous”. Clicking on these will trigger readings. “Trigger” will display a single reading, while “Continuous” will take a new reading every second. Figure 6 Sample Displ

16、ay Operating Instructions 17 Com Settings The PCTool software must be set to use the correct Com Port to communicate with the Antenna Monitor. The default is Com Port 1. To change the Com Port, select the correct one from the “ViewComm Port” menu, shown in Figure 7 below. Alarm Options Three alarms

17、can be configured from the software. All alarms are configured from the “ViewOptions” menu, shown in Figure 8 below. ?High VSWR: Calculated VSWR exceeds a setpoint. ?High Fwd Power: Measured power exceeds a setpoint. ?Low Forward Power: Measured power is less than a setpoint. ?NOTE: Some models are

18、not equipped with all alarm variations. Master Alarm Enable: allows the alarms to work. When this checkbox is unchecked, all alarms will be disabled. When it is checked, the VSWR alarm will automatically be enabled while “Alarm on Zero Power”, “High Power Alarm”, and “Low Power Alarm” will be on or

19、off depending on their checkboxes. Relay Energized on Alarm: The energized state of the relay can be set. When this checkbox is unchecked, the relay will be de-energized when an alarm is detected and energized when there is no alarm. With this setting, the alarm is fail-safe. When it is checked, the

20、 relay will be energized when an alarm is detected and de-energized when there is no alarm. Figure 7 Com Menu Bird BPM Series Broadcast Power Monitor 18 Latch Alarms: Sets whether the alarm will reset automatically in the absence of an alarm condition.When this checkbox is unchecked, if an alarm tri

21、gger is corrected the alarm will reset after a forty second delay. When it is checked, the alarm must be manually reset. Alarm at Power (Pwr) Up: At power up, before the instrument is ready to take measurements, the microcontroller resets the circuitry to the default condition and then performs inte

22、rnal initialization tasks (such as memory test, hardware setup, and reading EEPROM parameters). Check the Alarm at Pwr Up box to have the alarm relay set (enabled) during the microcontroller initialization time. This is Figure 8 Options Menu Operating Instructions 19 the default setting. Uncheck the

23、 Alarm at Pwr Up box to disable the alarm during the microcontroller initialization time. ?NOTE: When the Alarm at Pwr Up feature is disabled, the alarm relay may set for a few milliseconds during initialization. To avoid this, install the circuit shown below. VSWR Alarm: adjustable from 1.3 to 2.5

24、by increments of 0.1. To allow the VSWR alarm to trigger even at low forward power ( 2.5% of full scale power), check the “Alarm on Zero Power” checkbox. While the VSWR trip point can now be set to 2.5, the instrument cannot always measure VSWR above 1.9. This is due to the large amount of reflected

25、 power caused at higher VSWRs. The maximum VSWR that can be physically measured is determined by the ratio of the forward and reflected detectors at full scale. This ratio is 10:1. The maximum measurable VSWR occurs when the reflected channel is near its limit. The following table shows the maximum

26、possible VSWR measurement as a function of percentage of full scale forward input power. Use this table as a guide to determine the VSWR trip point. Percentage Full Scale Max VSWR 50%3.00 55%2.82 60%2.68 65%2.56 70%2.46 75%2.38 80%2.31 85%2.24 90%2.19 95%2.14 100%2.09 Bird BPM Series Broadcast Power

27、 Monitor 20 High Power Alarm: adjustable from 0 to 125% of the BPMs full scale power. The alarm setpoint is entered as the % of full scale. For example, if you have a 500W full scale unit and would like an alarm when the forward power exceeds 375 W, the alarm setpoint would be 375/500 x 100 or 75%.

28、Enter “75” in the field and check the “Enable High Power Alarm” checkbox. Low Power Alarm: set in the same way as the High Power Alarm, however this alarm will trigger when the forward power is less than the alarm setpoint. Terminal Commands There are two commands which can be sent when the BPM is c

29、onnected to a terminal. “T”The “T” command will cause the unit to echo a single measurement. The format is: nnn.n,nn.nnAB That is, three digits of forward power, a decimal point, a fourth digit of forward power, a comma, followed by two digits of reverse power, a decimal point, and two digits of rev

30、erse power. The first character following will be “A” if an alarm has been triggered until the alarm is reset, and will be blank if there is no alarm. The second character will be “0” if “Alarm on Zero Power” is disabled, and “1” if “Alarm on Zero Power” is enabled. “C”The “C” command will cause the

31、 unit to echo measurements repeatedly. The format is identical to the “T” command. The “C” command can be interrupted at any time by sending the “T” command. “A”The “A” command will reset the alarm. If an alarm condition is still present, the alarm will turn back on after being reset. 21 BPM Display

32、 Power OnAfter the AC power switch is set to ON, a message will be displayed. Examples of possible messages are: ?BPM Display ver x.xxx Shown at power-up for about 4 seconds. ?Waiting. Shown when no response is received from the BPM through the RS-232 Serial Port. ?Serial Pass Thru. Shown when a PC

33、or other remote device is connected to the Remote Computer Connector on the front panel. Mode Button Press MODE to cycle through the possible display modes for the right half of the display, which are: ?Reflected Power ?Match Efficiency (%) ?Return Loss (dB) ?VSWR (SWR) ?Reflection Coefficient () Un

34、its ButtonPress UNITS to toggle the display between Watts (W or kW) and dBm. The unit applies to forward power and to reflected power (if it is displayed). Reset Button Directly connected to the Alarm Reset pin of the BPM Power/Alarm connector. Alarm LEDDirectly connected to the Alarm pin on the BPM

35、 Power/Alarm connector. Bird BPM Series Broadcast Power Monitor 22 Maintenance 23 Chapter 5Maintenance This chapter contains cleaning, troubleshooting, specifications, and part information for the Bird Broadcast Power Monitor and BPM Display. Inspection and Cleaning This unit requires only simple an

36、d routine maintenance. 1.Wipe off dust and dirt regularly. Use a soft, clean cloth dampened with mild detergent. 2.Check connectors, connector pins, and cables for damage. If needed, clean the connectors using a self-drying contact cleaner that leaves no residue. Troubleshooting The Bird Broadcast P

37、ower Monitor has no operator serviceable parts. Any required service must be performed at an authorized service facility. The table below contains troubleshooting information for problems which can occur during normal operation. This manual cannot list all malfunctions that may occur, or their corre

38、ctive actions. If a problem is not listed or is not corrected by the listed actions, notify a qualified service center. CAUTION Do not use harsh or abrasive detergents for cleaning. WARNING Disconnect the unit from the RF power source and the ac line before any disassembly. The potential for electri

39、cal shock exists. Bird BPM Series Broadcast Power Monitor 24 BPM Display Fuses The BPM Display contains two time-delayed IEC (5 x 20mm) Type T 1.0A, 250V fuses. These are the only user replaceable parts. Refer to figure Figure 9 for fuse location. PROBLEMPOSSIBLE CAUSECORRECTION Operation/Test LED d

40、oes not illuminate No dc powerCheck power source Defective LEDReturn the unit to an authorized service center Alarm LED does not illuminate Defective LEDReturn the unit to an authorized service center High VSWRDirty connectorsClean connectors Defective connectorsReplace connectors Shorted or open tr

41、ansmission line Have the line serviced. BPM Display screen does not light Unit is not turned onSet AC Power Switch to ON Unit is not plugged inConnect ac power cord Fuse is blownReplace fuse Figure 9 Fuse Location ALRM NORM CLSD ALRM NORM OPEN ALRM COMMON ALRM TTL OUT REMOTE RESET GROUND RFL ANALOG

42、OUTPUT FWDPARALLEL SENSOR INTERFACE SERIAL Cleveland, Ohio USA Phone: (440) 248-1200 www.bird- MODEL 3129 S/N Electronic Corporation FUSE 1.0A, 250 V 115/230 VAC 50/60 Hz .6A MAX. LINE Fuse Box Maintenance 25 Customer Service Any maintenance or service procedure beyond the scope of those provided in

43、 this chapter should be referred to a qualified service center. If you need to return the unit for any reason, contact the Bird Service Center for a return authorization. All instruments returned must be shipped prepaid and to the attention of Bird Service Center. Bird Service Center 30303 Aurora Ro

44、ad Cleveland (Solon), Ohio 44139-2794 Phone: +1 440 519-2298 Fax: +1 440 519-2326 E-mail: bscbird- For the location of the sales office nearest you, give us a call or visit our Web site at: http:/www.bird- Replacement Parts DESCRIPTIONPart Number BPM Display3129 PCTool Software7005A970 9 pin RS-232

45、Interface Cable 50 ft. 10 ft. 5A2264-09-MF-50 5A2264-09-MF-10 DB-15 Interface Cable, 50 ft., male/female 5A2264-15-MF-50 DB-15 Interface ConnectorSUBCON-15/M-SH Bird BPM Series Broadcast Power Monitor 26 Specifications Broadcast Power Monitor (BPM) Frequency Range*50 125 MHz 100 250 MHz 400 1000 MHz

46、 RF Power Rating* Forward Reflected 50 W to 150 kW 5 W to 15 kW Dynamic Range13 dB Measurement TypeIn-line, true average power Peak/Average Ratio10 dB max. Coupler Directivity 25 dB Settling Time 1 year Recommended Calibration Cycle Interval User defined DimensionsSee “Line Sections” on page 29 Weig

47、ht, NominalSee “Line Sections” on page 29 *Element dependent. BPM element lists frequency range and max. power 1 hour after initially applying power, or 30 min. after changing power level. Power accuracy is valid only within the dynamic range of the element being used. For example, a 1000W element w

48、ith a 13 dB dynamic range will be accurate from 1000W down to 50W (50W is 13dB down from 1000W). A 6000W element with a 13dB dynamic range would be accurate from 6000W down to 300W (300W is 13dB down from 6000W). BPM Digital Display Display20 character LCD with LED backlight RS-232 Serial Port Conne

49、ctor Protocol Male DB-9 RS-232, 9600 baud, no parity, 8 data bits, 1 stop bit, no handshake Power/Alarm Parallel PortMale DB-15 connector Remote Computer Connector Connector Protocol Female DB-9 RS-232, 9600 baud, no parity, 8 data bits, 1 stop bit, no handshake AC Power Requirements115/230 Vac 50/60 Hz, 0.6 A Bird BPM Series Broadcast Power Monitor 28 AC ConnectorNorth American Power Cord Standard Domestic International Type SVT, 300 Vac, 18 AWG, 10 A, 3 conductor (including ground) Type H05VV-F, 300 Vac, 1.00 mm, 10 A, 3 conductor (including ground) Temperature Ope