HP 8590 E & L Series Spectrum Analyzers and HP 8591C Cable TV ...

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FFT, F&t Fourier Transform The FLATTOP window has the greatest frequency uncertainty of the windows, but it has outstanding side lobe suppression and amplitude flatness. Use FLATTOP to transform periodic signals. The HANNING window is a traditional passband window found in most real-time spectrum analyzers. The HANNING window offers a compromise between the FLATTOP and UNIFORM windows. Use the HANNING window when transforming periodic or random data. The values in the window trace range from -32,768 to 32,767 and are treated as fractional numbers. No offset is used. When FFT is called, the average window value is computed and used to correct the results in absolute units. The Fourier transforms of the window functions (created with TWNDOW) are shown below. Use the graphs to estimate resolution and amplitude uncertainty of a Fourier transform display. Each horizontal division of the graphs equals l/sweep-time or Fmax/BOO, and represents two trace array elements. When the source is longer than the destination, the source is truncated to fit. When the source is shorter than the destination, the last element is repeated to fill the destination. Note TWNDOW should always be set before FFI’ is executed. Execute MKREAD FFT to read the marker value as a frequency value instead of time value. 0 -10 -20 -30 -40 -50 cn 1 -60 ii -70 - -80 0 w -90 n -100 5-162 Programming Commands -110 -120 -130 -140 -150 - 1 6 0 " -it-- Figure 5-4. Hanning Filter Window cu115e
80 .90 00 0 -10 -20 -30 -40 VI -A -50 E -60 0 -70 E -80 -90 -100 -110 -120 -130 -140 I I 1 i I Figure 5-5. Uniform Filter Window Figure 5-6. Flat Top Filter Window FFT Fbst Fourier Transform I I I Programming Commands 5-163
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Title & Document Type: Manual Part
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Notice. The information contained i
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Assistance Product maintenance agre
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How to Use This Guide This guide us
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Contents 1. Preparing for Use What
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4. Creating and Using Downloadable
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COMPRESS Compress Trace . . . . . .
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LSPAN Last Span . . . . . . . . . .
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RLPOS Reference-Level Position . .
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Xhbles l-l. Setting of HP ThinkJet
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Connecting the Computer to the Spec
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Test Program To test the connection
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Test Program The program shown belo
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Note Because HP-IB cables can be co
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Plotting Using an HP-IB Interface N
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Printing Using an RS-232 Interface
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Plotting Using an RS-232 Interface
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Printing Using a Parallel Interface
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Plotting to an HP LaserJet Printer
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If There Is a Problem This section
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Writing Your First Program When the
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Modifying the Program Remote operat
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Enhancing the Program with Variable
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Getting Information from the Spectr
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Programming Guidelines 1. Perform t
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Controlling Trace Data with a Compu
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Saving Trace Data The trace data in
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Reading Trace Data from a Computer
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Program Example for the HP-IB Inter
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Program Example for the RS-232 Inte
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Returning the Spectrum Analyzer to
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350 GOSUB 500 360 TR3$=TR6$ 370 12=
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330 OUTPUT @Sa;"MKPK HI; TS;" 340 O
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Program Example for the RS-232 Inte
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Different Formats for Trace Data Tr
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B Format The B format allows you to
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A-Block Format The A-block format i
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M Format The M format is for sendin
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Trace Data Format TDF P TDF B TDF A
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Creating a DLP This section contain
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To Use a User-Defined Variable with
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To Enter Values into a DLP To allow
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File name Date and author's name Pr
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Storing DLPs on a RAM Card If the s
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Determining the Amount of Memory Ne
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‘lb Delete a DIP from Spectrum An
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‘Ib Access the DLP Editor . Press
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lb Modify the DLP 1. If necessary,
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DLP Programming Guidelines This sec
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Programming Commands What You’ll
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Syntax Elements are shown in the sy
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In the syntax diagrams, characters
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NONE NR Element NRM or NORMAL NTSC
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The alternate commands (listed in t
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This functional index categorizes t
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Function Category :ALIBRATION :OMMA
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Function Category ;RAPHICS NFORMATI
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Function Category LIMIT LINES :cont
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‘Ihble 5-4. Functional Index (con
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Function Category MEASURE/USER Icon
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Function Category RECALL or SAVE lP
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Function Category 3WEEP (continued)
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RIGGER Function Category JSER-DEFIN
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ABORT Abort Stops the execution all
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ABS Absolute Places the absolute va
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ACP Adjacent Channel Power Performs
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ACPBW Channel Bandwidth ACPBW Chann
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ACPCONTM Continuous Sweep Measureme
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ACPE Adjacent Channel Power Extende
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Setting the ACPGR to - 1, does the
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ACPMK Adjacent Channel Power Marker
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ACPPAR ACP Manual or Auto ‘able 5
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ACPSP Channel Spacing Allows you to
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ACTDEF Active Function Definition C
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Example 2 ACTDEF Active Function De
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ACTDEF Active Function Definition Q
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ADD Add Adds the sources and sends
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AMB Trace A Minus Trace B AMB Trace
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Description AMB Trace A Minus Trace
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Description AMBPL Trace A Minus Tra
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80 OUTPUT 718;"AMPCOR?;" 90 ENTER 7
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ANLGPLUS Analog Plus Turns on or of
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ANNOT Annotation Turns on or off th
Page 171 and 172:
AT Attenuation Specifies the RF inp
Page 173 and 174:
AUNITS Amplitude Units Specifies th
Page 175 and 176:
AVG Average Averages the source and
Page 177 and 178:
AXB Exchange Trace A and Trace B Ex
Page 179 and 180:
Query Response baud rate / \ BAUDRA
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Description The BIT places either a
Page 183 and 184:
Example 10 CLEAR 718 20 OUTPUT 718;
Page 185 and 186:
BML Trace B Minus Display Line Subt
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BXC Trace B Exchange Trace C Exchan
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Note Execute CAL STORE after succes
Page 191 and 192:
CAT Catalog Catalogs either spectru
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Information File name File Type Dat
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CF Center Frequency Specifies the c
Page 197 and 198:
CHP Channel Power Performs the chan
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CHPGR Channel Power Graph On or Off
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CLRBOX Clear Box Clears a rectangul
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CLRDSP Clear Display Erases user-ge
Page 205 and 206:
CLS Clear Status Byte Clears all st
Page 207 and 208:
CNF Confidence ‘I&t Performs the
Page 209 and 210:
CNTLB Auxiliary Interface Control L
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CNTLD Auxiliary Interface Control L
Page 213 and 214: COMB Comb Turns on or off the comb
Page 215 and 216: Example COMPRESS Compress Trace Thi
Page 217 and 218: Example 10 OUTPUT 718;"IP;" 20 OUTP
Page 219 and 220: CORREK Correction Factors On Return
Page 221 and 222: CRTHPOS Horizontal Position of CRT
Page 223 and 224: CTA Convert to Absolute Units CE4 C
Page 225 and 226: CTM Convert to Measurement Units CT
Page 227 and 228: OUTPUT 718;"MOV DA,D,ADDRESS;" OUTP
Page 229 and 230: DATEMODE Date Mode DATEMODE Date Mo
Page 231 and 232: DET Detection Mode Selects the spec
Page 233 and 234: DISPOSE Dispose DISPOSE Dispose Fre
Page 235 and 236: DIV Divide Divides source 1 by sour
Page 237 and 238: DL Display Line DL Display Line Def
Page 239 and 240: DN Down Reduces the active function
Page 241 and 242: Description DONE Done As shown by t
Page 243 and 244: DRAWBOX Draw Box Draws a rectangula
Page 245 and 246: DSPLY Display Displays the value of
Page 247 and 248: DT Define Terminator DT Define Term
Page 249 and 250: Description Unlike enter parameter
Page 251 and 252: ENTER Enter From HP-IB Allows the s
Page 253 and 254: EP Enter Parameter Function EP Ente
Page 255 and 256: EXP Exponent Places the exponential
Page 257 and 258: Description EXP Exponent The EXP co
Page 259 and 260: Description FA Start Frequency The
Page 261 and 262: Description FB Stop Frequency The F
Page 263: OUTPUT 718;"FFT TRA,TRA,TRB;VIEW TR
Page 267 and 268: FFTAUTO Marker to Auto FFT “Measu
Page 269 and 270: FFTCONTS FFT Continuous Sweep Perfo
Page 271 and 272: FFTMM FFT Marker to Midscreen FBTMM
Page 273 and 274: FFTOFF FFTOff Exits the fast Fourie
Page 275 and 276: FFTPCTAMR FFT Percent Amplitude Mod
Page 277 and 278: FFTSNGLS uses the following when pe
Page 279 and 280: FFTSTOP FFT Stop Frequency Sets the
Page 281 and 282: FMGAIN FM Gain Sets the total FM fr
Page 283 and 284: Description FOFFSET Frequency Offse
Page 285 and 286: FS Full Span Sets the frequency spa
Page 287 and 288: Example Connect CAL OUT to the spec
Page 289 and 290: GATECTL Gate Control GATECTL Gate C
Page 291 and 292: GD Gate Delay Sets the delay time f
Page 293 and 294: GDRVGDEL Gate Delay for the Frequen
Page 295 and 296: GDRVGLEN Gate Length for the Freque
Page 297 and 298: Query Response 7< r off 7 0 I outpu
Page 299 and 300: Query Response GDRVGTIM Gate Trigge
Page 301 and 302: Query Response GDRVPRI returns the
Page 303 and 304: Query Response GDRVPWID returns the
Page 305 and 306: Query Response GDRVRBW Couple Resol
Page 307 and 308: Query Response r e f e r e n c e /
Page 309 and 310: Query Response GDRVST Couple Sweep
Page 311 and 312: GDRVSWDE Delay Sweep for Time Windo
Page 313 and 314: GDRVSWP Sweep Time for the Time Win
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GDRVUTIL Gate Utility Turns on or o
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GDRVVBW Couple Video Bandwidth to G
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GETPLOT Get Plot GETPLOT Get Plot I
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GETPRNT Get Print GETPRNT Get Print
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GL Gate Length Sets the length of t
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GR Graph Graphs the given 9 coordin
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HAVE Have Returns a “0” if the
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I 3 Bit Position Bit Status = 0 Bit
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HN Harmonic Number HN Harmonic Numb
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HNLOCK Harmonic Number Lock Once HN
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HNUNLK Unlock Harmonic Number Unloc
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ID Identify Returns the spectrum an
Page 339 and 340:
Example IF TEEN ELSE ENDIF If Then
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INT Integer INT Integer Places the
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INZ Input Impedance Specifies the v
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GD GDRVGDEL GDRVGLEN GDRVRBW GDRVST
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IP Instrument Preset IP also clears
Page 349 and 350:
KEYCMD Key Command KEYCMD Key Comma
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170 180 190 200 210 220 230 240 250
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KEYDEF User-Defined Key Definition
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Example 2 KEYDEF User-Defined Key D
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KEYENH Key Enhance KEYENH Key Enhan
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Example 2 KEYENH Key Enhance Use th
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KEYENH Key Enhance Softkey numbers:
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KEYLBL Key Label Relabels a softkey
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LB Label LB Label Writes text (labe
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LB Label ‘Ihble 5-6. Character Se
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LF Base Band Instrument Preset Perf
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LIMIDEL Delete Limit-Line Table Del
Page 373 and 374:
LIMIDISP Limit Line Display When us
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Description LIMIFAIL returns one of
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LIMIHI Upper Limit Allows you to sp
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Description LIMILINE Limit Lines LI
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LIMILO Lower Limit Allows you to sp
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LIMIMODE Limit-Line Entry Mode LIMI
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LIMIREL Relative Limit Lines Specif
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LIMISEG Enter Limit-Line Segment fo
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LIMISEG Enter Limit-Line Segment fo
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Example OUTPUT 718;"LIMIDEL;" OUTPU
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LIMITEST Enable Limit Line ‘&stin
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LINFILL Line Fill Fills linear inte
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LN Linear Scale LN Linear Scale Spe
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LOAD Load File name: You must suppl
Page 401 and 402:
LOG Logarithm Prerequisite Commands
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LSPAN Last Span Changes the spectru
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MDS Measurement Data Size For this
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Query Response base1 ine reference
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MEANTH Trace Mean Above Threshold M
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MEASOFF Measurement Off MEASOFF’
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During this relative-amplitude mode
Page 415 and 416:
MENU Menu Selects and displays the
Page 417 and 418:
MERGE Merge Two Traces Merges the s
Page 419 and 420:
MF Marker Frequency Output Returns
Page 421 and 422:
MIN Minimum MIN Minimum Compares so
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MINH Minimum Hold Updates trace C w
Page 425 and 426:
MIRROR Mirror Image Displays the mi
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MKA Marker Amplitude MKA Marker Amp
Page 429 and 430:
MKACT Activate Marker Specifies the
Page 431 and 432:
MKBW Marker Bandwidth MKBW Marker B
Page 433 and 434:
MKCONT Marker Continue Resumes the
Page 435 and 436:
Description MKD Marker Delta The MK
Page 437 and 438:
Query Response de t a MKDLMODE Mark
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Example MKF Marker Frequency OUTPUT
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MKFCR Marker Counter Resolution Set
Page 443 and 444:
MKMIN Marker Minimum Moves the acti
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Example 10 INPUT "ENTER IN THE STAR
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Description MKNOISE Marker Noise Th
Page 449 and 450:
MKP Marker Position Places the acti
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MKPAUSE Marker Pause Pauses the swe
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MKPK Marker Peak Positions the acti
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Query Response MKPX Marker Peak Exc
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MKRRAD Marker Readout MKREAD Non-Ze
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MKSP Marker to Span Sets the start
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MKSTOP Marker Stop Stops the sweep
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MKTBL Marker ‘able Restrictions T
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MKTRACK Marker Track MKTRACK Marker
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ML Mixer Level ML Mixer Level Speci
Page 469 and 470:
MOD Modulo Example 10 OUTPUT 718;"V
Page 471 and 472:
MOV Move Copies the source values i
Page 473 and 474:
MPY Multiply Multiplies the sources
Page 475 and 476:
MS1 Mass Storage Is Allows you to s
Page 477 and 478:
MXM Maximum Example 10 OUTPUT 718;"
Page 479 and 480:
M4 Marker Zoom Activates a single m
Page 481 and 482:
NDB Number of dB Specifies the dist
Page 483 and 484:
OUTPUT 718;“MOV NDBPNT,O;” Turn
Page 485 and 486:
NRL Normalized Reference Level Sets
Page 487 and 488:
OA Output Active Function Value Sen
Page 489 and 490:
OBW Occupied Bandwidth Variable or
Page 491 and 492:
OL Output Learn String Transmits in
Page 493 and 494:
ONCYCLE On Cycle Description The ON
Page 495 and 496:
ONDELAY On Delay Description The ON
Page 497 and 498:
ONEOS On End of Sweep Description R
Page 499 and 500:
ONMKR On Marker Query Response -+(
Page 501 and 502:
ONMKRU On Marker Update 330 OUTPUT
Page 503 and 504:
ONSRQ On Service Request Executes t
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ONSWP On Sweep Executes the list of
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Description ONTIME On Time Limit th
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OUTPUT Output to Remote Port or Par
Page 512 and 513:
Description OUTPUT Output to Remote
Page 514 and 515:
3 . 2 5 0 GHz o,o ATTEN 1 0 dG Figu
Page 516 and 517:
‘Ihble 5-9. Spectrum Analyzer Sta
Page 518 and 519:
PCIAM Percent AM the PCTAM command
Page 520 and 521:
PD Pen Down PD Pen Down Instructs t
Page 522 and 523:
Example OUTPUT 718;"IP;SNGLS;" OUTP
Page 524 and 525:
Example PDF Probability Distributio
Page 526 and 527:
Example Connect CAL OUT to the spec
Page 528 and 529:
Query Response PEAKS Peaks Programm
Page 530 and 531:
Query Response peaks below peaks ab
Page 532 and 533:
PKRES Peak Result PKRES returns the
Page 534 and 535:
PKSORT Peak Sort PKSORT Peak Sort S
Page 536 and 537:
Query Response table PKTBL Peak ‘
Page 538 and 539:
PKZOOM Peak Zoom PKZOOM Peak Zoom A
Page 540 and 541:
PLOT Plot Initiates a plotter outpu
Page 542 and 543:
PLTPRT Plot Port PWPRT Plot Port Se
Page 544 and 545:
PP Preselector Peak Peaks the prese
Page 546 and 547:
PREAMPG External Preamplifier Gain
Page 548 and 549:
PRINT Print Initiates a output of t
Page 550 and 551:
PRNTADRS Print Address Allows you t
Page 552 and 553:
PSTATE Protect State PSTATE Protect
Page 554 and 555:
PURGE Purge. File Deletes the speci
Page 556 and 557:
Example DISP "CONNECT CAL OUT TO IN
Page 558 and 559:
RB Resolution Bandwidth Specifies t
Page 560 and 561:
RCLS Recall State RCLS Recall State
Page 562 and 563:
Description RCEI’ Recall Trace Th
Page 564 and 565:
REPEAT UNTIL Repeat Until The REPEA
Page 566 and 567:
RESETRL Reset Reference Level Reset
Page 568 and 569:
REV Revision RJW Revision Returns t
Page 570 and 571:
Description RL Reference Level The
Page 572 and 573:
RMS Root Mean Square Value Returns
Page 574 and 575:
RQS Service Request Mask Sets a bit
Page 576 and 577:
SAVEMENU Save Menu Saves menu 1 und
Page 578 and 579:
SAVET Save Trace !&WET Save Trace S
Page 580 and 581:
SAVRCLF Save or Recall Flag Indicat
Page 582 and 583:
Description SAVRCLN Save or Recall
Page 584 and 585:
SEGDEL Segment Delete Deletes the s
Page 586 and 587:
SENTER Segment Entry for Frequency
Page 588 and 589:
SENTER Segment Entry for Frequency
Page 590 and 591:
SENTERT Segment Entry for Sweep Tim
Page 592 and 593:
SER Serial Number Returns the seria
Page 594 and 595:
SETTIME Set Time Allows you to set
Page 596 and 597:
Example 10 OUTPUT 718;"IP;" 20 OUTP
Page 598 and 599:
SP Span Changes the total displayed
Page 600 and 601:
SPEAKER Speaker Turns on or off the
Page 602 and 603:
SQLCH Squelch Sets the squelch thre
Page 604 and 605:
Example OUTPUT 718 ; "SQR SP, lE8 ;
Page 606 and 607:
SRCALC Source Leveling Control Fbr
Page 608 and 609:
Description SRCAT Source Attenuator
Page 610 and 611:
Description SRCNORM Source Normaliz
Page 612 and 613:
SRCPSTP Source Power-Level Step Siz
Page 614 and 615:
SRCPSWP Source Power Sweep Selects
Page 616 and 617:
SRCPWR Source Power Selects the sou
Page 618 and 619:
SRCTK Source Tracking Adjusts the t
Page 620 and 621:
SRCTKPK Source Tracking Peak SRCTKP
Page 622 and 623:
Bit Number Decimal Equivalent 32 16
Page 624 and 625:
This displays the octal equivalent
Page 626 and 627:
Example 10 CLEAR 718 20 OUTPUT 718;
Page 628 and 629:
Query Response ST Sweep Time Progra
Page 630 and 631:
STDEV Standard Deviation of Trace A
Page 632 and 633:
STOR Store Stores data on a RAM car
Page 634 and 635:
Description STOR Store The STOR com
Page 636 and 637:
Example SUB Subtract OUTPUT 718;"SU
Page 638 and 639:
SUMSQR Sum of Squared Trace Amplitu
Page 641 and 642:
SYNCMODE Synchronize Mode Selects t
Page 643 and 644:
TA Transfer A Returns trace A ampli
Page 645 and 646:
TDF Trace Data Format Formats trace
Page 647 and 648:
TDF Trace Data Format Example of ho
Page 649 and 650:
!IDFB TDF Trace Data Format Descrip
Page 651 and 652:
TEXT lkxt Writes text on the spectr
Page 653 and 654:
TIMEDATE Time Date Allows you to se
Page 655 and 656:
TITLE Title Activates the screen ti
Page 657 and 658:
Query Response TM Trigger Mode QTM
Page 659 and 660:
TO1 Third-Order Intermodulation Mea
Page 661 and 662:
TRA/TRB/TRC Trace Data Input and Ou
Page 663 and 664:
TRCMEM Trace Memory TRCMEM Trace Me
Page 665 and 666:
Description TRDEF Trace Define The
Page 667 and 668:
TRGRPH Trace Graph Displays a compr
Page 669 and 670:
TRMATH Trace Math Executes a list o
Page 671 and 672:
TRPRST Trace Preset Sets the trace
Page 673 and 674:
TS Thke Sweep Starts and completes
Page 675 and 676:
TVSFRM TV Frame Selects the type of
Page 677 and 678:
TVSTND TV Standard Selects the trig
Page 679 and 680:
TVSYNC TV Sync Selects the polarity
Page 681:
UP UP Increases the value of the ac
Page 684 and 685:
VARDEF Variable Definition Creates
Page 686 and 687:
VARIANCE Variance of Trace Amplitud
Page 688 and 689:
VAVG Video Average Enables the vide
Page 690 and 691:
VB Video Bandwidth Query Response 5
Page 692 and 693:
VIEW View Trace Displays trace A, t
Page 694 and 695:
WINNEXT Window Next When using the
Page 696 and 697:
WINON Window ON Displays the two wi
Page 698 and 699:
WINZOOM Window Zoom When using the
Page 700 and 701:
XCH Exchange Example OUTPUT 718;"XC
Page 702 and 703:
ZMKCNTR Zone Marker at Center Frequ
Page 704 and 705:
ZMKPKNR Zone Marker for Next Right
Page 706 and 707:
ZMKSPAN Zone Marker Span Query Resp
Page 708 and 709:
The preamplifier gain is set by usi
Page 710 and 711:
Hewlett-Packard and is available fo
Page 712 and 713:
INVALID KEYLBL: _ - - Indicates tha
Page 714 and 715:
OVEN COLD Indicates that the spectr
Page 716 and 717:
Trace A is not available Indicates
Page 718 and 719:
RS-232 and Parallel Option 043 What
Page 720 and 721:
Person0 computer Analyzer TxD 2 > >
Page 722 and 723:
Connecting a LaserJet Printer able
Page 724 and 725:
Setting the Spectrum Analyzer Baud
Page 726 and 727:
B Bl, 5-9 B2, 5-9 B3, 5-9 B4, 5-9 b
Page 728 and 729:
demodulation, 5-128 DET, 5-129 dete
Page 730 and 731:
FUNCDEF command avoiding problems,
Page 732 and 733:
limits failed, 5-272 mirror limit l
Page 734 and 735:
NRL, 5-384 NTSC triggering, 5-575 n
Page 736 and 737:
PWRUPTIME, 5-456 It Rl, 5-10 R2, 5-
Page 738 and 739:
marker step size, 5-358 STOP FREQ s
Page 740:
window next, 5-592 window off, 5-59
show all

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