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A7R24 to R: The feedback loop ensures that the detected output current is linear in relationship to input current to enhance the accuracy of the calibrated display. Next, the bandwidth amplitudes are set.
Operating HP T Spectrum Analyser
Thanks for the info. If this does not correct the malfunction, replace the Bandpass Filter. But I also have an original manual; I could scan some of the images if you like.
Change the Schematic as shown in Figure A7R23 to R: FX0 met FLM 5. A complete list of test equipment and a list of accessories are contained in Table Check base line clipper circuit.
Use long-nose pliers between transistor and hot soldering iron as a heat sink. A12U1 HP Part number to If the voltages are incorrect, see Service Sheet 9. Many adjustments are directly re- lated to preceding or following ones. Search waveform should be as shown in Figure with amplitude from 8. In any correspondence refer to the instru- ment by model number and full serial number. Adjust frequency of signal generator to keep pulses aligned on graticule lines as adjustment is made.
NOTE Replacement instructions are the same as those listed for transistor replacement. If no change in display occurs when the switch is used, check for an open circuit or faulty capacitor.
HP 8552B Manual
The emitter follower output of each stage provides the input signal to the following stage and signal currents to the summing bus. This signal is the 30 MHz calibrator signal. Meter readings should be about the same as TPIO. Search the history of over billion web pages on the Internet. The variable capacitive elements are varactors which are controlled by a dc 85522b from the RF Section front panel screw- driver adjustment.
Upon receipt of the instrument the operator must per- form the front panel adjustments as shown in the RF Section manual. If calibration cannot be accomplished, try the typical value shown in the parts list and repeat the test. The 0 to 12 dB amplifier and the emitter follower output 8552g are shown on Service Sheet 7.
HP Agilent Mainframe 141T Display 8555a Spectrum Analyzer RF 8552b If Section
For example, model number HP is now model number Agilent These units are ‘modular’ a complete analyser being made up from the display frame, 1 x RF and 1x IF plug-in. A3A2R7 toR: If correct readings are obtained the summing amplifiers are functioning properly.
Signal Amplitude should be 7. Complimentary copies of the supplement are available from Hewlett-Packard. AlORlO and show the — Test Equipment and Accessories Required.
The transistor associated with pins of U2 is used as a diode to raise the signal level 0.
See Service Sheet 5. This allows the input signal to be coupled directly to the output amplifier. It is further assumed h the tuning input from A12, the 50 MHz input, and the correct operating voltages are present. No attempt is made in this procedure to iso- late causes of trouble to the component level. The kit can be obtained by contacting your nearest Hewlett-Packard Sales and Service office. At the rear, a special cable connects the B to Aux B on the T. If voltage is present see Service Sheet Change the figure as shown by Figure 1.
Initial Inspection If 88552b signal were correct at all bandwidths, pro- ceed to step Q. The diagram as shown in the partial schematics. Ql, Q2 and Q4 comprise a unity-gain feedback amplifier with high input impedance 852b 3 MHz.
Typical level is 9 mV rms.