Custom-Cal has a high success rate in repairing Agilent's 8703 Analyzer System. We specialize in quick turnaround times and we can handle expedited deliveries upon request.
The Agilent 8703A and 8703B are a manufacturing test solution for such diverse optical and electro-optical components, assemblies and devices as lasers and LEDs, photodiodes, fiber cables, connectors and transmitter/receiver pairs. Measurements can also be made on electrical microwave components such as amplifiers, cables, connectors, attenuators, and waveguides. The 8703B has improved measurement stability and repeatability, overall accuracy improvement, measurement sequencing, access to the internal laser, four channels, wider bandwidth, five markers and limit lines.

Warnings or errors reported.
 
 
Warnings:
OVER ILLUMINATION IN OPTICAL INPUT
  This message warns that too much optical power is entering the OPTICAL RECEIVER INPUT. If optical power is not reduced, damage may occur.
AUTOBIAS IS TURNED OFF
  The modulator bias mode is switched off , either manually or due to insufficient signal for bias adjust. Autobiasing can be switched on in the Service Menu and it is advised to switch autobias ON when making O/O and O/E measurements.
BANDWIDTH LIMIT INVALID: MIN BW > MAX BW
  The bandwidth test has a minimum bandwidth greater than the maximum bandwidth. Change the minimum bandwidth to a frequency less than the frequency of the maximum bandwidth or change the maximum bandwidth to a frequency greater than the frequency of the minimum bandwidth
CAUTION: INSUFFICIENT SIGNAL FOR BIAS ADJUST
  This message is displayed when the optical power is too low to perform an auto bias. The common causes of this message are dirty or poor optical connectors, defective optical cables, and the safety interlock port at the rear of the test set.
CAUTION: LASER KEY SWITCH IS TURNED OFF
  Refer to the LASER SOFTKEY IS OFF error message description.
CAUTION: LASER SOFTKEY IS OFF
  This message is usually displayed when you are trying to make an optical measurement when the laser softkey is set to OFF. The message will also be displayed if the auto bias timer instructs the instrument to perform the auto bias routine. You can disable the auto bias timer by pressing System, Service Menu, Lightwave Menu, Bias Mode Auto/OFF.
CAUTION: LW TEST SET MISSING
  This message indicates that the unit is unable to communicate with the lightwave test set. The probable causes are no power to the lightwave test set, and the 25-pin test set interconnect cable is not connected properly.
CAUTION: TOO MANY SEGMENTS OR POINTS
  This message is displayed if you try to insert too many segments or points using your current function.
COPY OUTPUT COMPLETED
  The analyzer has completed outputting data to the printer or plotter. The analyzer can now accept another copy command.
FACTORY CAL ARRAY X IS NOT FOUND
  Improper firmware usage. The analyzer needs to be recalibrated if this message persists. The results of lightwave measurements will be erroneous. Instrument needs service if this message persists.
FILE NOT COMPATIBLE WITH INSTRUMENT
  You cannot recall user graphics that had been saved on an earlier model of analyzer with a monochrome display. These files cannot be used with the analyzer.
FORMATTING DATA
  The list information is being processed for a list data output to a copy device and stored in the copy spool buffer. During this time, the analyzer's resources are dedicated to this task (which takes less than a few seconds).
IF BW KEY DISABLED, EDIT LIST MODE TBL
  When list IF bandwidth has been enabled and swept list mode is on, you will not be able to change the IF bandwidth using the IF BW, key. To change the IF bandwidth, edit the swept list table.
INIT DISK removes all data from disk
  Continuing with the initialize operation will destroy any data currently on the disk.
INSUFFICIENT SIGNAL FOR BIAS ADJUST
  Autobias failed due to lack of enough laser power to the modulator. Check that the jumper is not removed. Instrument needs service if this message persists.
PRINTER: reset in progress. Information Message.
  If the printer takes longer than a half-second to reset, this message will be displayed until printer is finished with reset.
PROCESSING DISPLAY LIST
  The display information is being processed for a screen print to a copy device and stored in the copy spool buffer. During this time, the analyzer's resources are dedicated to this task (which takes less than a few seconds).
RIPPLE LIMIT TABLE EMPTY
  The ripple limit table does not have any frequency bands defined. Add at least one frequency band to the ripple limit table for ripple testing.
SEGMENT #n POWER OUTSIDE RANGE LIMIT
  The selected power range does not support the power level of one or more segments in the swept list table. This message appears when swept list mode is not on and reports the first segment that is out of range. Change the segment power or change the power range.
SEGMENT #n START FREQ OVERLAPS PREVIOUS SEGMENT
  A segment entered in the swept list table caused one or more frequency segments to overlap. This message appears when swept list mode is not on and reports the first segment that is overlapping another. Change the frequency ranges of the overlapping segments.
SOURCE POWER DISABLED, EDIT LIST MODE TBL
  When list power has been enabled and swept list mode is on, you will not be able to change the power level using the Power, key. To change the power level, edit the swept list table.
SOURCE POWER TURNED OFF, RESET UNDER POWER MENU
  You have exceeded the maximum power level at one of the inputs and power has been automatically reduced. The annotation P? indicates that power trip has been activated. When this occurs, reset the power and then press Power, SOURCE PWR on OFF, to switch on the power.
STARTING COPY SPOOLER
  The analyzer is beginning to output data from the spool buffer to the copy device. The analyzer resumes normal operation; the data is being output to the copy device in the background.
SWEEP TRIGGER SET TO HOLD
  The instrument is in a hold state and is no longer sweeping. To take a new sweep, press Sweep Setup, TRIGGER MENU, SINGLE, or CONTINUOUS.
VALID ONLY FOR BILATERAL DEVICES
  This message is displayed when an enhanced reflection calibration is initiated. If the device tested is not a bilateral device, the enhanced reflection calibration will cause errors in the measurement results. A bilateral device has similar forward and reverse transmission characteristics. Examples of bilateral devices are passive devices (filters, attenuators, and switches). Most active devices (amplifiers) and some passive devices (isolators and circulators) are not bilateral.
WAITING FOR CLEAN SWEEP
  In single sweep mode, the instrument ensures that all changes to the instrument state, if any, have been implemented before taking the sweep. The command that you have initiated is being processed and will not be complete until the new sweep is completed. An asterisk * is displayed in the left margin until a complete fresh sweep has been taken.
WAITING FOR DISK
  This message is displayed between the start and finish of a read or write operation to a disk.
WAITING FOR GPIB CONTROL
  You have instructed the analyzer to use pass control (USEPASC). When you send the analyzer an instruction that requires active controller mode, the analyzer requests control of the bus and simultaneously displays this message. If the message remains, the system controller is not relinquishing the bus.

Errors:
68 ADDITIONAL STANDARDS NEEDED
  Error correction for the selected calibration class cannot be computed until you have measured all the necessary standards.
31 ADDRESSED TO TALK WITH NOTHING TO SAY
  You have sent a read command to the analyzer (such as ENTER 716) without first requesting data with an appropriate output command (such as OUTPDATA). The analyzer has no data in the output queue to satisfy the request.
200 ALL REGISTERS HAVE BEEN USED
  You have used all of the available registers; you can store no more instrument states even though you may still have sufficient memory. There are 31 registers available, plus the preset instrument state.
212 ANALOG BUS DISABLED IN 6 KHZ IF BW
  When you press Avg, IF BW [6000], the analog bus is disabled and not available for use in troubleshooting. For a description of the analog bus, refer to the service guide.
60 ANALOG INPUT OVERLOAD
  The power level of the analog input is too high. Reduce the power level of the analog input source.
37 ANOTHER SYSTEM CONTROLLER ON GPIB
  You must remove the active controller from the bus or the controller must relinquish the bus before the analyzer can assume the system controller mode.
206 ARGUMENT OUT OF RANGE
  The argument for a programming command is out of the specified range. Refer to the programmer’s guide for a list of programming commands and argument ranges.
193 ASCII: MISSING 'BEGIN' STATEMENT
  The CITIfile you just downloaded over the GPIB or via disk was not properly organized. The analyzer is unable to read the “BEGIN” statement.
194 ASCII: MISSING 'CITIFILE' STATEMENT
  The CITIfile you just downloaded over the GPIB or via disk was not properly organized. The analyzer is unable to read the “CITIFILE” statement.
195 ASCII: MISSING 'DATA' STATEMENT
  The CITIfile you just downloaded over the GPIB or via disk was not properly organized. The analyzer is unable to read the “DATA” statement.
196 ASCII: MISSING 'VAR' STATEMENT
  The CITIfile you just downloaded over the GPIB or via disk was not properly organized. The analyzer is unable to read the “VAR” statement.
13 AVERAGING INVALID ON NON-RATIO MEASURE
  You cannot use sweep-to-sweep averaging in single-input measurements. Sweep-to-sweep averaging is valid only for ratioed measurements (A/R, B/R, A/B, and S-parameters). You can use other noise reduction techniques, such as narrower IF bandwidth, for single input measurements.
181 BAD FREQ FOR HARMONIC
  You recalled a calibration that resulted in start and stop frequencies that are beyond the allowable limits.
183 BATTERY FAILED. STATE MEMORY CLEARED
  The battery protection of the non-volatile CMOS memory has failed. The CMOS memory has been cleared. Refer to Chapter 8, “Preset State and Memory Allocation” for more information about the CMOS memory.
184 BATTERY LOW! STORE SAVE REGS TO DISK
  The battery protection of the non-volatile CMOS memory is in danger of failing. If this occurs, all of the instrument state registers stored in CMOS memory will be lost. Save these states to a disk. Refer to Chapter 8, “Preset State and Memory Allocation” for more information about the CMOS memory.
34 BLOCK INPUT ERROR
  The analyzer did not receive a complete data transmission. This is usually caused by an interruption of the bus transaction. Clear by pressing the Local, key or aborting the I/O process at the controller.
35 BLOCK INPUT LENGTH ERROR
  The length of the header received by the analyzer did not agree with the size of the internal array block. Refer to the programmer’s guide for instructions on using analyzer input commands.
74 CALIBRATION ABORTED
  You have changed the active channel during a calibration, so the calibration in progress was terminated. Make sure the appropriate channel is active and restart the calibration.
63 CALIBRATION REQUIRED
  A calibration set could not be found that matched the current stimulus state or measurement parameter. You will have to perform a new calibration.
185 CANNOT FORMAT DOS DISKS ON THIS DRIVE
  You have attempted to initialize a floppy disk to DOS format on an external disk drive that does not support writing to all 80 tracks of the double density and high density disks. The older single-sided disks had only 66 tracks and some disk drives were limited to accessing that number of tracks. To format the disk, either choose another external disk drive or use the analyzer's internal disk drive.
199 CANNOT MODIFY FACTORY PRESET
  You have attempted to rename, delete, or otherwise alter the factory preset state. The factory preset state is permanently stored in ROM and cannot be altered. If your intent was to create a user preset state, you must create a new instrument state, save it, and then rename it to “UPRESET”. Refer to Chapter 8, “Preset State and Memory Allocation” for more detailed instructions.
203 CANNOT READ/WRITE HFS FILE SYSTEM
  The disk is being accessed by the analyzer and is found to contain an HFS (hierarchical file system) or files nested within subdirectories. The analyzer does not support HFS. Replace the disk medium with a LIF or DOS formatted disk that does not contain files nested within subdirectories.
127 CAN'T STORE/LOAD SEQUENCE, INSUFFICIENT MEMORY
  Your sequence transfer to or from a disk could not be completed due to insufficient memory.
215 CAUTION: CORRECTION OFF: AUX CHANNEL(S) DISABLED
  This message is displayed when correction is forced off due to a stimulus change that is not compatible with the current calibration while an auxiliary channel is enabled. The auxiliary channels are restored when correction is turned on by pressing Cal, CORRECTION on OFF.
218 CAUTION: FLOPPY DISK IS FULL
  This message is displayed if you try to save files to the floppy disk that does not have enough memory to perform the save task. Correct by inserting a new floppy disk in the front panel disk drive or by erasing files from the current floppy disk.
159 CH1 (CH2, CH3, CH4) TARGET VALUE NOT FOUND
  Your target value for the marker search function does not exist on the current data trace.
10 CONTINUOUS SWITCHING NOT ALLOWED
  Your current measurement requires different power ranges on channel 1 and channel 2. To protect the attenuator from undue mechanical wear, test sethold will be activated. The “tsH” (test set hold) indicator in the left margin of the display indicates that the inactive channel has been put in the sweep hold mode. This message is also displayed if a mechanical switch test set is in use and channels are measuring parameters that require the test set to switch continuously, for example S11 on Channel 1 and S22 on Channel 2
170 COPY: device not responding; copy aborted
  The printer or plotter is not accepting data. Verify the cable connections, GPIB addresses, and otherwise ensure that the copy device is ready.
66 CORRECTION TURNED OFF
  Critical parameters in your current instrument state do not match the parameters for the calibration set, therefore correction has been turned off. The critical instrument state parameters are sweep type, start frequency, frequency span, and number of points.
64 CURRENT PARAMETER NOT IN CAL SET
  Correction is not valid for your selected measurement parameter. Either change the measurement parameters or perform a new calibration.
130 D2/D1 INVALID WITH SINGLE CHANNEL
  You can only make a D2/D1 measurement if both channels are on.
152 D2/D1 INVALID: CH1 CH2 NUM PTS DIFFERENT
  You can only make a D2/D1 measurement if both channels have the same number of points.
111 DEADLOCK
  A fatal firmware error occurred before instrument preset completed. Instrument needs service.
17 DEMODULATION NOT VALID
  Demodulation was selected when the analyzer was not in CW time mode. Select demodulation only after putting the analyzer into CW time mode.
119 DEVICE: not on, not connect, wrong addrs
  The device at the selected address cannot be accessed by the analyzer. Verify that the device is switched on, and check the GPIB connection between the analyzer and the device. Ensure that the device address recognized by the analyzer matches the GPIB address set on the device itself.
188 DIRECTORY FULL
  There is no room left in the directory to add files. Either delete files or get a new disk.
39 DISK HARDWARE PROBLEM
  The disk drive is not responding correctly. If using an external disk drive, refer to the disk drive operating manual.
48 DISK IS WRITE PROTECTED
  The store operation cannot write to a write-protected disk. Slide the write-protect tab over the write-protect opening in order to write data on the disk.
40 DISK MEDIUM NOT INITIALIZED
  You must initialize the disk before it can be used.
190 DISK MESSAGE LENGTH ERROR
  The analyzer and the external disk drive aren't communicating properly. Check the GPIB connection and then try substituting another disk drive to isolate the problem instrument.
38 DISK: not on, not connected, wrong addrs
  The disk cannot be accessed by the analyzer. Verify power to the disk drive, and check the GPIB connection between the analyzer and the disk drive. Ensure that the disk drive address recognized by the analyzer matches the GPIB address set on the disk drive itself.
189 DISK READ/WRITE ERROR
  There may be a problem with your disk. Try a new floppy disk. If a new floppy disk does not eliminate the error, suspect hardware problems.
49 DISK WEAR - REPLACE DISK SOON
  Cumulative use of the disk is approaching the maximum. Copy files as necessary using an external controller. If no controller is available, load instrument states from the old disk and store them to a newly initialized disk using the save/recall features of the analyzer. Discard the old disk.
125 DUPLICATING TO THIS SEQUENCE NOT ALLOWED
  A sequence cannot be duplicated to itself.
72 EXCEEDED 7 STANDARDS PER CLASS
  When modifying calibration kits, you can define a maximum of seven standards for any class.
192 FILE NOT FOUND
  The requested file was not found on the current disk medium.
197 FILE NOT FOUND OR WRONG TYPE
  During a recall operation, either the file was not found or the type of file was not an instrument state file.
42 FIRST CHARACTER MUST BE A LETTER
  The first character of a disk file title or an internal save register title must be an alpha character.
75 FORMAT NOT VALID FOR MEASUREMENT
  Conversion measurements (Z or Y reflection and transmission) are not valid with Smith chart and SWR formats.
202 FUNCTION NOT AVAILABLE
  The function you requested over GPIB is not available on the current instrument.
14 FUNCTION NOT VALID
  The function you requested is incompatible with the current instrument state.
131 FUNCTION NOT VALID DURING MOD SEQUENCE
  You cannot perform sequencing operations while a sequence is being modified.
201 FUNCTION NOT VALID FOR INTERNAL MEMORY
  The function you selected only works with disk files.
163 FUNCTION ONLY VALID DURING MOD SEQUENCE
  You can only use the GOSUB SEQUENCE, capability when you are building a sequence. Attempting to use this softkey at any other time returns an error message and no action is taken.
61 8703 SOURCE PARAMETERS CHANGED
  Some of the stimulus parameters of the instrument state have been changed, because you have turned correction on. A calibration set for the current measurement parameter was found and activated. The instrument state was updated to match the stimulus parameters of the calibration state.
169 GPIB COPY IN PROGRESS, ABORT WITH LOCAL
  A GPIB copy was already in progress when you requested the GPIB for another function. To abort the first copy, press Local, otherwise the GPIB is unavailable until the first copy is completed.
46 ILLEGAL UNIT OR VOLUME NUMBER
  The disk unit or volume number set in the analyzer is not valid. Refer to the disk drive operating manual.
47 INITIALIZATION FAILED
  The disk initialization failed, probably because the disk is damaged.
56 INSTRUMENT STATE MEMORY CLEARED
  All instrument state registers have been cleared from memory along with any saved calibration data, memory traces, and calibration kit definitions. Additionally, all user-settable selections (such as GPIB addresses) are set to their defaults.
51 INSUFFICIENT MEMORY
  Your last front panel or GPIB request could not be implemented due to insufficient memory space. In some cases, this is a fatal error from which you can escape only by presetting the instrument.
168 INSUFFICIENT MEMORY FOR PRINT/PLOT
  There is not enough memory available for the print or plot function. Increase the available memory by changing or eliminating a memory-intensive operation such as reducing the number of points in the sweep.
154 INSUFFICIENT MEMORY, PWR MTR CAL OFF
  There is not enough memory space for the power meter calibration array. Increase the available memory by clearing one or more save/recall registers, or by reducing the number of points.
2 INVALID KEY
  An invalid key was attempted; there may be a possible hardware failure.
223 ISOL AVERAGES < SWP AVERAGES
  The isolation averages are less than the instrument sweep averages. Increase the isolation averages to be equal to or greater than instrument sweep averages. This error can only occur when instrument averaging is turned on.
219 LASER TEMPERATURE LOOP OPEN
  The laser temperature is unstable. (This message may appear for the first few minutes when the analyzer is powered up.) Cycle the analyzer power and allow a warm-up time of two hours, then press any key. If the message persists, instrument needs service..
205 LIMIT TABLE EMPTY
  Limit lines cannot be turned on unless a limit table has been created. Refer to the “Making Measurements” chapter of the user’s guide for information on how to create a limit table.
9 LIST TABLE EMPTY
  The frequency list is empty. To implement list frequency mode, add segments to the list table.
150 LOG SWEEP REQUIRES 2 OCTAVE MINIMUM SPAN
  A logarithmic sweep is only valid if the stop frequency is greater than four times the start frequency. For frequency spans of less than two octaves, the sweep type automatically reverts to linear sweep.
224 LW TESTSET MISSING
  The lightwave testset may be powered down separately, or the cable at the rear panel may be removed or loose.
132 MEMORY FOR CURRENT SEQUENCE IS FULL
  All the memory in the sequence you are modifying is filled with instrument commands.
220 MODULATOR TEMPERATURE LOOP OPEN
  The modulator temperature is unstable. (This message may appear for the first few minutes when the analyzer is powered up.) Cycle the analyzer power and allow a warm-up time of two hours, then press any key. If the message persists, instrument needs service..
71 MORE SLIDES NEEDED
  When you use a sliding load (in a user-defined calibration kit), you must set at least three slide positions to complete the calibration.
69 NO CALIBRATION CURRENTLY IN PROGRESS
  The RESUME CAL SEQUENCE, softkey is not valid unless a calibration is already in progress. Start a new calibration.
41 NO DISK MEDIUM IN DRIVE
  You have no disk in the current disk unit. Insert a disk, or check the disk unit number stored in the analyzer.
114 NO FAIL FOUND
  The self-diagnose function of the instrument operates on an internal test failure. At this time, no failure has been detected.
45 NO FILE(S) FOUND ON DISK
  No files of the type created by an analyzer store operation were found on the disk or the disk drive is empty. If you requested a specific file title, that file was not found on the disk.
5 NO IF FOUND: CHECK R INPUT LEVEL
  The first IF signal was not detected during pretune. Check the front panel R channel jumper. If there is no visible problem with the jumper, refer to the service guide for troubleshooting.
144 NO LIMIT LINES DISPLAYED
  You can turn limit lines on but they cannot be displayed on polar or Smith chart display formats.
15 NO MARKER DELTA - SPAN NOT SET
  You must turn the delta marker mode on, with at least two markers displayed, in order to use the MARKER -> SPAN, softkey function.
123 NO MEMORY AVAILABLE FOR INTERPOLATION
  You cannot perform interpolated error correction due to insufficient memory.
126 NO MEMORY AVAILABLE FOR SEQUENCING
  You cannot modify the sequence due to insufficient memory.
70 NO SPACE FOR NEW CAL. CLEAR REGISTERS
  You cannot store a calibration set due to insufficient memory. You can free more memory by clearing a saved instrument state from an internal register (which may also delete an associated calibration set, if all the instrument states using the calibration set have been deleted). You can store the saved instrument state and calibration set to a disk before clearing them. After deleting the instrument states, press Preset, to run the memory packer.
198 NOT ALLOWED DURING POWER METER CAL
  When the analyzer is performing a power meter calibration, the GPIB bus is unavailable for other functions such as printing or plotting.
44 NOT ENOUGH SPACE ON DISK FOR STORE
  The store operation will overflow the available disk space. Insert a new disk or purge files to create free disk space.
54 NO VALID MEMORY TRACE
  If you are going to display or otherwise use a memory trace, you must first store a data trace to memory.
55 NO VALID STATE IN REGISTER
  You have requested the analyzer, over GPIB (or by sequencing), to load an instrument state from an empty internal register.
43 ONLY LETTERS AND NUMBERS ARE ALLOWED
  You can only use alpha-numeric characters (and underscores) in disk file titles or internal save register titles. Other symbols are not allowed, except for the “underscore” symbol.
211 OVERLAP! LIST TYPE CHANGED TO STEPPED
  The list type changed to stepped because one or more frequency segments in the swept list table overlapped. Change the frequency ranges of the overlapping segments and switch back to swept list mode.
58 OVERLOAD ON INPUT A, POWER REDUCED
  See OVERLOAD ON INPUT R, POWER REDUCED (error number 57).
59 OVERLOAD ON INPUT B, POWER REDUCED
  See OVERLOAD ON INPUT R, POWER REDUCED (error number 57).
57 OVERLOAD ON INPUT R, POWER REDUCED
  You have exceeded approximately +14 dBm at one of the test ports. The RF output power is automatically reduced to -85 dBm. The annotation P? appears in the left margin of the display to indicate that the power trip function has been activated. When this occurs, reset the power to a lower level, then toggle the softkey to switch on the power again.
165 PARALLEL PORT NOT AVAILABLE FOR GPIO
  You have defined the parallel port as COPY for printing in the GPIB menu. To access the parallel port for general purpose I/O (GPIO), set the selection to PARALLEL [GPIO].
167 PARALLEL PORT NOT AVAILABLE FOR COPY
  You have defined the parallel port as general purpose I/O (GPIO) for sequencing. The definition was made under the Local, key menus. To access the parallel port for copy, set the selection to PARALLEL [COPY].
4 PHASE LOCK CAL FAILED
  An internal phase lock calibration routine is automatically executed at power-on, preset, and any time a loss of phase lock is detected. This message indicates that phase lock calibration was initiated and the first IF detected, but a problem prevented the calibration from completing successfully.
7 PHASE LOCK FAILURE
  The first IF signal was detected at pretune, but phase lock could not be acquired. Check the signal level to the R channel input to make sure it is -35 dBm or higher.
8 PHASE LOCK LOST
  Phase lock was acquired but then lost.
27 PLOT ABORTED
  When you press the Local, key, the analyzer aborts the plot in progress.
26 PLOTTER: not on, not connect, wrong addrs
  The plotter does not respond to control. Verify power to the plotter, and check the GPIB connection between the analyzer and the plotter. Ensure that the plotter address recognized by the analyzer matches the GPIB address set on the plotter itself.
28 PLOTTER NOT READY-PINCH WHEELS UP
  The plotter pinch wheels clamp the paper in place. If you raise the pinch wheels, the plotter indicates a “not ready” status on the bus.
6 POSSIBLE FALSE LOCK
  Phase lock has been achieved, but the source may be phase locked to the wrong harmonic of the synthesizer.
116 POWER METER INVALID
  The power meter indicates an out-of-range condition. Check the test setup.
118 POWER METER NOT SETTLED
  Sequential power meter readings are not consistent. Verify that the equipment is set up correctly. If so, preset the instrument and restart the operation.
179 POWER OUT MAY BE UNLEVELED
  There is either a hardware failure in the source or you have attempted to set the power level too high. The analyzer allows the output power to be set higher or lower than the specified available power range. However, these output powers may be un-leveled or unavailable. Check to see if the power level you set is within specifications.
21 POWER SUPPLY HOT!
  The temperature sensors on the A8 post-regulator assembly have detected an over-temperature condition. The power supplies regulated on the post-regulator have been shut down.
22 POWER SUPPLY SHUT DOWN!
  One or more supplies on the A8 post-regulator assembly have been shut down due to an over-current, over-voltage, or under-voltage condition.
25 PRINT ABORTED
  When you press the Local, key, the analyzer aborts output to the printer.
178 print color not supported with EPSON
  You have defined the printer type as EPSON-P2. Color print is not supported with this printer. The print will abort.
176 PRINTER: busy
  The parallel port printer is not accepting data.
175 PRINTER: error
  The parallel port printer is malfunctioning. The analyzer cannot complete the copy function.
173 PRINTER: not connected
  There is no printer connected to the parallel port.
177 PRINTER: not handshaking
  The printer at the parallel port is not responding.
172 PRINTER: not on line
  The printer at the parallel port is not set on line.
24 PRINTER: not on, not connected, wrong addrs
  The printer does not respond to control. Verify power to the printer, and check the GPIB connection between the analyzer and the printer. Ensure that the printer address recognized by the analyzer matches the GPIB address set on the printer itself.
171 PRINTER: paper error
  There is a paper-related problem with the parallel port printer such as a paper jam or out-of-paper condition.
174 PRINTER: power off
  The power to the printer at the parallel port is off.
166 PRINT/PLOT IN PROGRESS, ABORT WITH LOCAL
  If a print or plot is in progress and you attempt a second print or plot, this message is displayed and the second attempt is ignored. To abort a print or plot in progress, press Local.
117 PWR MTR NOT ON/CONNECTED OR WRONG ADDRS
  The power meter cannot be accessed by the analyzer. Verify that the power meter address and model number set in the analyzer match the address and model number of the actual power meter.
213 RANGE CAUSED POWER LVL CHANGE IN LIST
  The selected power range changed the power level of one or more segments in the swept list table. Change the segment power or change the power range.
219 RECEIVER TEMPERATURE LOOP OPEN
  The receiver temperature is unstable. (This message may appear for the first few minutes when the analyzer is powered up.) Cycle the analyzer power and allow a warm-up time of two hours, then press any key. If the message persists, instrument needs service.
30 REQUESTED DATA NOT CURRENTLY AVAILABLE
  The analyzer does not currently contain the data you have requested. For example, this condition occurs when you request error term arrays and no calibration is active.
151 SAVE FAILED. INSUFFICIENT MEMORY
  You cannot store an instrument state in an internal register due to insufficient memory. Increase the available memory by clearing one or more save/recall registers and pressing Preset, or by storing files to a disk.
124 SELECTED SEQUENCE IS EMPTY
  The sequence you attempted to run does not contain instrument commands.
112 SELF TEST #n FAILED
  Internal test #n has failed. Several internal test routines are executed at instrument preset. The analyzer reports the first failure detected.
157 SEQUENCE ABORTED
  The sequence running was stopped prematurely when you pressed the Local, key.
153 SEQUENCE MAY HAVE CHANGED, CAN'T CONTINUE
  When you pause a sequence, you cannot continue it if you have modified it. You must start the sequence again.
73 SLIDES ABORTED (MEMORY REALLOCATION)
  You cannot perform sliding load measurements due to insufficient memory. Increase the available memory by clearing one or more save/recall registers and pressing Preset, or by storing files to a disk and then deleting them from internal memory.
187 SWEEP MODE CHANGED TO CW TIME SWEEP
  If you select external source auto or manual instrument mode and you do not also select CW mode, the analyzer is automatically switched to CW.
11 SWEEP TIME INCREASED
  You have made instrument changes that cause the analyzer sweep time to be automatically increased. Some parameter changes that cause an increase in sweep time are narrower IF bandwidth, an increase in the number of points, and a change in sweep type.
12 SWEEP TIME TOO FAST
  The fractional-N and digital IF circuits have lost synchronization.
33 SYNTAX ERROR
  You have improperly formatted a GPIB command. Refer to the programmer’s guide for proper command syntax.
36 SYST CTRL OR PASS CTRL IN LOCAL MENU
  The analyzer is in talker/listener mode. In this mode, the analyzer cannot control a peripheral device on the bus. Use the local menu to change to system controller or pass control mode.
57 TEST PORT OVERLOAD, REDUCE POWER
  You have exceeded approximately +14 dBm at one of the test ports (or 0 dBm at the A or B sampler, Option 012 only). When this occurs, reduce the power to a lower level.
133 THIS LIST FREQ INVALID
  You have set frequencies in the list that are outside of the allowable frequency range of the analyzer. Reduce the frequency range of the list.
164 TOO MANY NESTED SEQUENCES. SEQ ABORTED
  You can only nest sequences to a maximum level of six. The sequence will abort if you nest more than six.
50 TOO MANY SEGMENTS OR POINTS
  You can have a maximum of 30 segments or 1601 points in frequency list mode. In power meter calibrations, you can have a maximum of 12 segments for power sensor cal factors and power loss functions.
32 WRITE ATTEMPTED WITHOUT SELECTING INPUT TYPE
  You have sent the data header “#A” to the analyzer with no preceding input command (such as INPUDATA). The instrument recognized the header but did not know what type of data to receive. Refer to the programmer’s guide for command syntax information.
77 WRONG DISK FORMAT, INITIALIZE DISK
  You have attempted to store, load, or read file titles, but your disk format does not conform to the Logical Interchange Format (LIF) or DOS format. You must initialize the disk before reading or writing to it.

Instrument Options:
011 HMS-10 Connector
012 FC/PC Connector
013 DIN 47256 Connector
014 ST Connector
015 Biconic Connector
017 SC Connector
100 Adds External Lightwave Source Input
210 1550 nm DFB Laser
220 1300 nm DFB Laser
300 Adds One Lightwave Receiver 1300 nm and 1500 nm
Description of Model 
20 GHz Lightwave Component Analyzer
 
Lightwave Source
Wavelength: 1308 ±10 nm, 1550 ±10 nm (option based)
Average optical output power: -11.6 to -2.2 dBm
Spectral width: 3 nm RMS (FP) or 50 MHz (DFB) (typical)
Modulation bandwidth: 130 MHz to 20 GHz
Modulation frequency resolution: 1 Hz
Modulated Signal Output Power from Modulator (p-p): -10.5 to -8.9 dBm
Modulation index: 25% (typical)
Optical return loss: 15 dBo (typical)
Lightwave Receiver
Wavelength: 1298 to 1560 nm
Input modulation bandwidth: 130 MHz to 20 GHz
Maximum average input power operating level: 7 dBm
Input port return loss (typical): 20 dBo
Microwave Source
Frequency bandwidth: 130 MHz to 20 GHz
Frequency resolution: 1 Hz
Output power range: +5 to –70 dBm
Microwave Receiver
Frequency bandwidth: 130 MHz to 20 GHz
Maximum input power operating level: 0 dBm

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