Custom-Cal has a high success rate in repairing Agilent 8753A, 8753B and 8753C Network Analyzers. We specialize in quick turnaround times and we can handle expedited deliveries upon request.
The Agilent HP 8753A, 8753B and 8753C provide excellent RF network measurements for lab and production test areas. When combined with a test set, it yields a complete solution for characterizing the linear behavior of either active or passive networks, devices, or components from 300 kHz to 3 GHz. With two independent display channels available, you can simultaneously measure and display the reflection and transmission characteristics of the device under test.

Errors and Options for Network Analyzer.
  Error Messages:
ADDITIONAL STANDARDS NEEDED (error #68).
  Error correction for the selected calibration class cannot be computed without measuring the necessary standards.
ADDRESSED TO TALK WITH NOTHING TO SAY (error #31).
  An enter command was sent to the HP 8753 without first requesting data with an appropriate output command (such as OUTPDATA). The HP 8753 has no data in the output queue to satisfy the request.
AIR FLOW RESTRICTED: CHECK FAN FILTER (error #20).
  An inadequate air flow condition has been detected. Clean fan filter. For most efficient cooling, the instrument covers should be in place. If problem persists, troubleshoot power supplies.
AVERAGING INVALID ON NON-RATIO MEASURE (error #13).
  Sweep to sweep averaging is only valid for ratioed measurements: AI R, BI R, AfB. Other noise reduction techniques are available for single input measurements.
BLOCK INPUT ERROR (error #34).
  The HP 8753A did not receive a complete data transmission, usually caused by an interruption of the bus transaction: pressing the [LOCAL] key, or aborting the 10 process at the controller.
BLOCK INPUT LENGTH ERROR (error #35).
  The length header received by the HP 8753A did not agree with the size of the internal array block.
CALIBIRATION ABORTED (error #74)
  The calibration in progress was terminated due to change of active channel.
CALIBRATION REQUIRED (error #63)
  A calibration set could not be found that matched the current stimulus state or measurement parameter.
CAN'T CHANGE-ANOTHER CONTROLLER ON BUS (error #37)
  The HP 8753A cannot assume the mode of system controller until the active controller is removed from the bus or relinquishes the bus.
CHANGE HP-IB to SYST CTRL or PASS CTRL
  The HP 8753A cannot control another peripheral while in TALKER/LISTENER mode.
CAN'T STORE/LOAD SEQUENCE, INSUFFICIENT MEMORY (error #127)
  A sequence transfer to or from an external disc could not be completed because of insufficient memory.
CH1 (CH2) TARGET VALUE NOT FOUND (error #159)
  The target value for the marker search function does not exist on the current data trace.
CONTINUOUS SWITCHING NOT ALLOWED (error #10)
  The current measurement states require the S-parameter test set to automatically switch between a forward and reverse measurement, driving test port 1, then test port 2. To guard against undue mechanical wear in the RF switch, continuous switching is not allowed. The tsH indicator in the left margin of the display indicates that the instrument has been put in the sweep hold mode due to the test set. Turn dual channel OFF and make one measurement at a time by discretely activating each channel, or use NUMBER OF GROUPS trigger type to enable a limited series of dual channel measurements.
CORRECTION CONSTANTS NOT STORED (error #3)
  A store operation to the EEPROM was not successful. The position of the jumper on . the A9 CPU assembly must be changed. Refer to A9 CC Jumper Position Procedure in the Adjustments and Correction Constants section of the service manual.
CORRECTION TURNED OFF (error #66)
  Critical parameters in the current state do not match the parameters for the calibration set, therefore correction has been turned off. Critical state parameters are sweep type, start frequency, frequency span, and number of points.
CURRENT PARAMETER NOT IN CAL SET (error #64)
  Correction is not valid for the selected measurement parameter.
D2/D1 INVALID WITH SINGLE CHANNEL (error #130)
  A D2/D1 measurement can only be made if both channels are on.
D2/D1 INVALID. CH1 CH2 NUM PTS DIFFERENT (error #152)
  A D2/D1 measurement can only be made if both channels have the same number of points.
DEADLOCK (error #111)
  A fatal firmware error has occurred. Press the preset key or cycle the line power to reset the instrument.
DIEMODULATION NOT VALID (error #17)
  Demodulation is only valid for the CW time mode.
DISC: not on, not connected, wrong addrs (error #38)
  The disc cannot be accessed by the HP 8753. Verify power to the disc drive and the HP-IB connection between the HP 8753 and the disc. Ensure that the correct disc address is input to the HP 8753.
DEVICE: not on, not connect, wrong addrs (error #119)
  The device at the power meter address cannot be accessed by the HP 8753. Verify power to the device, and check the HP-IB connection between the HP 8753 and the device. Ensure that the device address recognized by the network analyzer matches the HP-IB address set on the device itself.
DISC HARDWARE PROBLEM (error #39)
  The disc drive is not responding correctly. Refer to the disc operating manual.
DISC MEDIUM NOT INITIALIZED (error #40)
  The disc must be initialized before it is used.
DISC MEDIUM FULL
  The store operation will overflow available disc space. Insert a new disc or purge files appearing last in the directory to create free disc space.
DISC IS WRITE PROTECTED (error #48)
  The store operation cannot write to a write-protected disc. Slide the write-protect tab over the write-protect opening in order to write data on the disc.
DISC WEAR - REPLACE DISC SOON (error #49)
  Cumulative use of the disc is approaching the maximum. Copy files as necessary using an external controller. If no controller is available, load instrument states from the old disc and store them to a newly initialized disc using the save/recall features of the HP 8753A.
DUPLICATING TO THIS SEQUENCE NOT ALLOWED (error #125)
  A sequence cannot be duplicated to itself.
EXCEEDED 7 STANDARDS PER CLASS (error #72)
  A maximum of seven standards can be defined for any class.
EXTERNAL SOURCE MODE REQUIRES CW TIME (error #148)
  An external source can only be phase locked and measured in the CW time sweep mode.
FIRST CHARACTER MUST BE A LETTER (error #42)
  The first character of a disc file title or an internal save register title must be an alpha character.
FREQ OFFSET ONLY VALID IN NETWORK ANALYZER MODE (error #140)
  Frequency offset measurements can only be made in the network analyzer mode because this is the only mode that controls the source.
FUNCTION NOT VALID (error #14)
  The requested function is incompatible with the current instrument state.
FUNCTION NOT VALID DURING MOD SEQUENCE (error #131)
  Sequencing operations cannot be performed while a sequence is being modified.
ILLEGAL UNIT OR VOLUME NUMBER (error #46)
  The disc unit or volume number set in the HP 8753 is not valid.
INIT DISC removes all data from disc
  Warning! Continuing with the initialize operation will destroy any data currently on the disc.
INITIALIZATION FAILED (error #47)
  Disc initialization failed, usually due to a damaged disc.
INPUT OVERLOAD, ATTENUATOR SET TO MAX (error #160)
  This message occurs only with an HP85047A test set when the instrument is in 6 GHz mode. The power level at the A or B input has exceeded the maximum allowed, and the attenuator has been set automatically to 70 dB to reduce the power. The annotation P?appears in the left margin of the display to indicate that power trip has been activated.
INSTRUMENT STATE MEMORY CLEARED (error #56)
  The five instrument state registers have been cleared from memory along with any calibration or calibration kit definitions.
INSUFFICIENT MEMORY (error #51)
  The last front panel or HP-IB request could not be implemented due to insufficient memory space. In some cases, this is a fatal error which can only be escaped by presetting the instrument.
INSUFFICIENT MEMORY, PWR MTR CAL OFF (error #154)
  A power meter calibration array requires more memory space than is currently available. Increase the available memory by clearing one or more save/recall registers, or by reducing the number of points.
INVALID KEY (error #2)
  An undefined key was pressed.
LIST TABLE EMPTY (error #9)
  The frequency list is empty. To implement LIST FREQ mode, add segments to the list table.
LOG SWEEP REQUIRES 2 OCTAVE MINIMUM SPAN (error #150)
  A logarithmic sweep is only valid if the stop frequency is greater than 4 times the start frequency. For frequency spans of less than two octaves, the sweep type automatically reverts to linear sweep.
LOW-PASS: FREQ LIMITS CHANGED
  The frequency domain data points must be harmonically related from DC to the stop frequency. If this condition is not true when a low pass mode is selected, the end points of the frequency range are modified as necessary.
LOW PASS MODE NOT ALLOWED (error #18)
  Gating with 1601 points is only allowed in bandpass mode.
MEMORY FOR CURRENT SEQUENCE IS FULL (error #132)
  All the memory in the sequence being modified is filled with instrument commands.
MORE SLIDES NEEDED (error #71)
  At least three slides are required to complete the calibration.
NO 6 GHZ TEST SET PRESENT (error #120)
  Sampler correction cannot be performed on an option 006 (6 GHz) instrument unless an HP 85047A 6 GHz test set is connected.
NO CALIBRATION CURRENTLY IN PROGRESS (error #69)
  The [RESUME CAL SEQUENCE] key is not valid unless a calibration was previously in progress. Start a new calibration.
NO DISC MEDIUM IN DRIVE (error #41)
  No disc was found in the current disc unit. Insert disc or check the disc unit number stored in the HP8753.
INO FAIL FOUND (service error #114)
  The self-diagnose function of the instrument operates on an internal test failure. At this time, no failure has been detected. Refer to Troubleshooting Reference in the service manual for information on internal tests.
INO FILE(S) FOUND ON DISC (error #45)
  No files of the type created by an HP 8753A save operation were found on the disc.
NO IF FOUND: CHECK R INPUT LEVEL (error #5)
  The first IF was not detected during the pretune stage. Ensure that the R input is connected with at least - 35 dBm input power to R.
NO LIMIT LINES DISPLAYED (error #144)
  Limit lines are turned on but cannot be displayed on polar or Smith chart display formats.
NO MARKER DELTA - SPAN NOT SET (error #15)
  The [MARKER - SPAN] key function requires delta marker mode be turned on with at least two markers displayed.
NO MEMORY AVAILABLE FOR INTERPOLATION (error #123)
  Interpolated error correction cannot be performed due to insufficient memory. Increase the available memory by clearing one or more save/recall registers.
NO MEMORY AVAILABLE FOR SEQUENCING (error #126)
  The sequence cannot be modified due to insufficient memory. Increase the available memory by clearing one or more save/recall registers.
NO PHASE LOCK: CHECK R INPUT LEVEL (error #7)
  The first IF was detected at the pretune stage but phaselock could not be acquired thereafter. Refer to the system level troubleshooting in the service manual.
NO SPACE FOR NEW CAL. CLEAR REGISTERS (error #70)
  Insufficient memory is available to store a calibration set. Memory can be freed by clearing a saved instrument state that will result in the deletion of a saved calibration set.
NO VALID MEMORY TRACE (error #54)
  In order to display or otherwise use the memory trace, a data trace must first be stored to memory.
NO VALID STATE IN REGISTER (error #55)
  A request to load an instrument state from an empty register was received over HP-IB.
NOT ENOUGH SPACE ON DISC FOR STORE (error #44)
  The store operation will overflow the available disc space. Insert a new disc or purge the files appearing last in the directory, to create free disc space.
NOT VALID FOR PRESENT TEST SET (error #62)
  The calibration requested is inconsistent with the test set type. This message occurs when (1) a full two port calibration is requested with any test other than an HP 85046A/B, or (2) a 1 port, 2 path calibration is requested with an HP 85046A (this is typically used with transmission/reflection test sets).
ONLY LETTERS AND NUMBERS ARE ALLOWED (error #43)
  Non-alphanumeric characters are not allowed in disc file titles or internal save register titles.
OPTIONAL FUNCTION; NOT INSTALLED (error #1)
  The function you requested requires a capability provided by an option to the standard HP 8753. That option is not currently installed.
OVERLOAD ON INPUT A, POWER REDUCED (error #58)
  Whenever the power level at one of the three receiver inputs exceeds approximately + 2 dBm, the RF OUT power level is reduced to the minimum possible level. A P? appears in the left margin of the display to indicate that the power trip function has been activated. To remedy this condition, decrease the power level at the input below 0 dBm. Then turn the power trip off.
OVERLOAD ON INPUT B, POWER REDUCED (error #59)
  Whenever the power level at one of the three receiver inputs exceeds approximately + 2 dBm, the RF OUT power level is reduced to the minimum possible level. A P? appears in the left margin of the display to indicate that the power trip function has been activated. To remedy this condition, decrease the power level at the input below 0 dBm. Then turn the power trip off.
OVERLOAD ON INPUT R, POWER REDUCED (error #57)
  Whenever the power level at one of the three receiver inputs exceeds approximately + 2 dBm, the RF OUT power level is reduced to the minimum possible level. A P? appears in the left margin of the display to indicate that the power trip function has been activated. To remedy this condition, decrease the power level at the input below 0 dBm. Then turn the power trip off.
PHASE LOCK CAL FAILED (error #4)
  An internal phase lock calibration routine is automatically executed at power-on, when a drift in pretune values has been detected, and anytime a phase lock problem is detected (loss of lock). This message indicates that phase lock calibration was initiated and the first IF detected, but a problem prevented the calibration from completing successfully. Refer to the Troubleshooting Reference section of the service manual and execute test 48, Pretune Correction.
PHASE LOCK LOST (error #8)
  Phase-lock was acquired but then lost. Refer to the Troubleshooting reference section of the Service Manual and execute the phase lock diagnostic routine. See Service Modes.
PLOT ABORTED (error #27)
  Depressing any front panel key causes the HP 8753 to abort the plot in progress.
PLOTTER: not on, not connect, wrong addrs (error #26)
  Plotter doesn't respond. Check line power, HP-IB connections. Verify that the plotter address set in the HP 8753 matches the actual address of the plotter.
PLOTTER NOT READY-PINCH WHEELS UP (error #28)
  The plotter pinch wheels are responsible for clamping the paper in place. With the pinch wheels raised, the plotter indicates a " not ready" status on the bus.
POSSIBLE FALSE LOCK (error #6)
  The instrument is achieving phase lock but possibly on the wrong comb tooth. Refer to the Adjustments and Correction Constants section of the Service Manual and execute pretune correction.
POW MET INVALID (error #116)
  The power meter indicates an out-of-range condition. Check the test set up.
POW MET NOT SETTLED (error #118)
  Sequential power meter readings are not consistent. Verify that equipment is set up correctly. If so, preset the instrument and restart the routine.
POW MET NOT FOUND
  Power meter does not respond over HP-IB. Check line power and HP-IB connections to the power meter. Verify that the power meter address and model number set in the HP 8753A matches the address and model number of the actual power meter.
POW MET: not on, not connected, wrong addrs (error #117)
  The power meter cannot be accessed by the HP 8753. Verify that the power meter address and model number set in the HP 8753 match the address and model number of the actual power meter.
POWER SUPPLY HOT! (error #21)
  The temperature sensors on the A8 Post Regulator assembly have detected an over-temperature condition. Note, the power supplies regulated on that assembly have been shut down.
POWER SUPPLY SHUT DOWN! (error #22)
  One or more supplies on the A8 Post Regulator assembly have been shut down due to one of the following conditions: over-current, over-voltage, or under-voltage.
PRESENT LIST FREQ INVALID IN 3 GHZ RANGE (error #139)
  Frequency list segments above 3 GHz were set while the instrument was in 6 GHz mode using the HP 85047A test set. These frequencies can only be used in the 6 GHz mode. Either change the frequency list or press [FREQ RANGE 3GHz6GHz] to turn on the 6 GHz mode.
PIRINT ABORTED (error #25)
  Depressing any front panel key causes the HP 8753 to abort output to the printer.
PRINTER: not on, not connected, wrong addrs (error #24)
  Printer doesn't respond. Check line power, HP-IB connections. Verify that the printer address set in the HP 8753 matches the actual address of the printer.
PROBE POWER SHUT DOWN! (error #23)
  The biasing supplies to the probe are shut down due to exessive current draw. Troubleshoot probe.
REQUESTED DATA NOT CURRENTLY AVAILABLE (error #30)
  The HP 8753 does not currently contain the data being requested. This condition occurs when requesting, for example, error term arrays without an active calibration in the instrument.
SAVE FAILED. INSUFFICIENT MEMORY (error #151)
  The instrument state could not be saved in an internal register because of insufficient memory. Increase the available memory by clearing one or more save/recall registers, or by storing files to an external disc.
SELECTED SEQUENCE IS EMPTY (error #124)
  The sequence you tried to run does not contain instrument commands.
SELF TEST #n FAILED (service error #112)
  Internal test #n has failed. Several internal test routines are executed upon preset of the instrument. The HP 8753A reports the first failure detected. Refer to the Troubleshooting Reference section of the Service Manual for more information on internal tests and the self-diagnose feature.
SEQUENCE ABORTED (error #157)
  The running sequence was stopped prematurely when the operator pressed the [LOCAL] key.
SEQUENCE MAY HAVE CHANGED, CAN'T CONTINUE (error #153)
  The sequence that was paused cannot be continued because it has been modified. The sequence must be started again.
SLIDES ABORTED (MEMORY REALLOCATION) (error #73)
  Memory was taken for other functions. Reduce memory usage (see chapter 10), then redo sliding loads.
SOURCE PARAMETERS CHANGED (error #61)
  Some of the stimulus parameters of the instrument state have been changed. This is usually due to a request to turn 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.
SWEEP TIME INCREASED (error #11)
  Sweep time is automatically increased to compensate for other instrument state changes. Some parameters which cause an increase in sweep time are an increase in the number of points, narrower IF bandwidths, and sweep type.
SWEEP TIME TOO FAST (error #12)
  The fractional-N and the digital IF circuits have lost synchronization. Refer to the System Troubleshooting section in the Service Manual for more information.
SWEEP TRIGGER SET TO HOLD
  The instrument is in a hold state and is no longer sweeping.
SWEEP TYPE CHANGED TO LINEAR SWEEP (error #145)
  If the frequency list mode is active when the [FREQ RANGE 3GHz6GHz] softkey is pressed, or when the instrument mode is changed to harmonic measurements, and the list frequencies do not fall in the allowable frequency range of these modes, the list mode is turned off.
SYNTAX ERROR (error #33)
  An improperly formatted command was received over HP-IB.
SYST CTRL OR PASS CTRL IN LOCAL MENU (error #36)
  The HP 8753 cannot control a peripheral device on the bus while it is in talker/listener mode. Use the local menu to change to system controller or pass control mode.
SYSTEM IS NOT IN REMOTE (error #52)
  The HP 8753 is in local mode. In this mode, the HP 8753 will not respond to HP-IB commands with front panel key equivalents. It will however, respond to commands which have no such equivalents, such as status requests.
TARGET VALUE NOT FOUND
  The target value for the marker search function does not exist on the current data trace.
TEST ABORTED (error #113)
  A service test has been prematurely stopped at the operator's request.
THIS LIST FREQ INVALID IN HARM/3 GHZ RNG (error #133)
  The frequencies in the list do not fall in the allowable frequency range for harmonic measurements, or for 6 GHz operation with an HP 85047A test set. Reduce the frequency range of the list.
TOO MANY SEGMENTS OR POINTS (error #50)
  Frequency list mode is limited to 30 segments or 1632 points. Refer to chapter 3 for more information.
TRANSFORM, GATE NOT ALLOWED (error #16)
  Transformation to the time domain is not allowed for sweep types other than linear and CW.
TROUBLE! CHECK SETUP AND START OVER (service error #115)
  Refer to the Adjustments and Corrections Constants section of the Service Manual for the appropriate equipment set up for this routine.
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 HP-IB command that the instrument is currently processing will not complete until the sweep completes.
WAITING FOR HP-IB CONTROL
  The HP 8753A has been instructed to use pass control (USEPASC). When the instrument next receives an instruction requiring active controller mode, it requests control of the bus and simultaneously displays this message. If the message remains, the system controller is not relinquishing the bus.
WAITING FOR DISC
  This message is displayed between the start and finish of a read or write operation to a disc.
WRITE ATTEMPTED WITHOUT SELECTING INPUT TYPE (error #32)
  The data header for the HP 8753, "#A" , was received with no preceding input command (such as INPUDATA). The instrument recognized the header but did not know what type of data to receive.
WRONG DISC FORMAT, INITIALIZE DISC (error #77)
  A command to store, load, or read file titles has been received, but the disc format does not conform to the Logical Interchange Format (LlF). The instrument must initialize the disc before reading or writing to it.

Instrument Options:
010 Time Domain Capability
   
   
   
   
   
Description of Model 
Network Analyzer
Frequency Characteristics
• Frequency Range: 300 kHz to 3 Ghz
• Frequency Resolution: 1 Hz
• Frequency Accuracy (25 C): ±10 ppm
Source Output Characteristics
• Power Range: -5 to +20 dBm
• Power Accuracy (50 MHz, +10 dBm): ±0.5 dB
• Power Linearity (relative to +10 dBm, 25 ±5 C):
-5 to + 15 dBm: ±0.2 dB
+ 15 to +20 dBm: ±0.5 dB
• Impedance 50Ω
• Harmonics: ≤ -25 dBc (20 dBm output level); typically < -50 dBc (0 dBm output level)
Receiver
• Frequency Range: 300 kHz to 3 GHz
• Inputs: A, B 100 dB dynamic range
• Sensitivity (noise level):
3 kHz BW: -90 dBm
10 Hz BW: -100 dBm (typically -110 dBm)
• Maximum Input Level: 0 dBm
• Impedance: 50Ω
• Input Crosstalk:
300 kHz to 1 GHz: -100 dB
1 GHz to 3 GHz: -90 dB
• Dynamic Accuracy: ±0.05 dB, ±0.5 deg over a 50 dB input range
 
 

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