Manual - 8500A Series Peak Power Meter - Giga-tronics

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Remote Operation 180 ! COMMANDS WILL INITIATE THE 190 ! PPM’S PLOT ROUTINE. THE 200 ! ADDRESS OF THE PLOTTER AND 210 ! PPM MUST BE SET CORRECTLY - 220 ! IN THIS CASE THE PPM IS AT 704, 230 ! AND THE PLOTTER IS AT 706. 240 OUTPUT 704;PLCN&C$ 250 ! SEND CODE NUMBER TO PPM 260 OUTPUT 704;PLPN&P$ 270 ! SEND PART NUMBER TO PPM 280 290 ! THESE ARE THE COMMANDS TO 300 ! INITIATE THE PLOT ROUTINE: 310 320 OUTPUT 704;PLOT 330 ! (PUTS PPM IN PLOT OUTPUT MODE) 340 350 SEND 7;UNL 360 SEND 7;LISTEN 6 370 ! (LISTEN ADDRESSES THE PLOTTER) 380 SEND 7;TALK 4 390 ! (TALK ADDRESSES THE PPM) 400 410 SEND 7;DATA 420 ! (RELEASES ATN LINE ALLOWING 430 ! PLOTTING TO BEGIN) 440 450 WAIT 180 460 ! WAIT UNTIL PLOTTING HAS 470 ! FINISHED BEFORE UNTALKING 480 ! THE PPM. PLOT TAKES ABOUT 490 ! 3 MINUTES 500 510 ! UNTALK AND UNLISTEN ALL BUS 520 ! DEVICES 530 SEND 7;UNT UNL 540 END Manual No. 20790, Rev C, November 1998 3-9 Superceded by Revision D, March 2009
Series 8500A Peak Power Meters Temperature Difference Output Mode This mode determines the difference in temperature for each detector since it was last calibrated. The mode provides a means to maintain measurement accuracy by allowing the software to determine when a detector Self-Cal is required. If detector temperature difference information is desired, the command DTMP is sent to the PPM. The instrument will then be ready to output a data string in the following format (x and y = temperature reading digits; s = polarity): DTPAsxx.x,DTPBsyy.y(CR)(LF-EOI) This will be true with both the Model 8501A and 8502A instruments. If a detector is not present, the digit portion of the string will read +00.0. The zeros can either mean no change in temperature difference or no detector present. With the 8501A, the B reading will always be zeros. Sample Program: Status Byte 10 ! THIS PROGRAM EXTRACTS 20 ! TEMPERATURE INFORMATION 30 ! FROM THE PPM SO THAT A 40 ! CONTROLLER CAN DETERMINE 50 ! IF A SELF-CAL IS REQUIRED. 60 ! IF THE TEMP SINCE LAST SELF- 70 ! CAL IS MORE THAN +/-5 DEG-C, 80 ! SELF-CAL IS RECOMMENDED 90 DIM A$(19) 100 110 120 OUTPUT 704;DTMP 130 ENTER 704;A$ 140 DISP A$ 150 END The PPM uses this mode to send its status byte as a character string. The value sent is the internal status value. It is not exactly the same as the byte sent during a serial poll in which bit-7 is high when service is being requested (see Service Requests in Section 3.4). The character string sent out to represent the status value will consist of a four character head, STAT, followed by three digits. This output mode can only be active when SRQ is disabled. Service request status bytes are not buffered when SRQ is disabled, so only the most recent status value will be output. The status value is followed by a carriage return, followed by a line feed sent with EOI. Stand Alone Plot Output Mode Plotting Without Using a Controller: The PPM uses this mode to send HPGL digital plotter commands to plot a pulse, much as it does in the Plot Mode. The difference is that stand alone plots are initiated by commands from the front panel of the PPM. This is to allow plotting without the use of a controller (see Digital Plotting of Graphic Data in Section 2.9). Stand Alone Plot Output Mode: PPM Internal Procedures: These actions are performed by the PPM when the Stand Alone Plot is initiated from the front panel. Before the PPM can output plotter information, it is necessary to first enter the Graph Mode of operation. Chapter 2 of this manual contains the information required to prepare for and produce digital plots of Graph Mode and Marker sub-mode data. The following paragraphs describe the PPM’s internal procedures for GPIB interaction when front panel plots are to be made. 3-10 Manual No. 20790, Rev C, November 1998 Superceded by Revision D, March 2009
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Manual Part Number: 20790 Revision
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Errata Sheet for Series 8500A Peak
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Manual - 8500A Series Peak Power Meter - Giga-tronics

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