HP 4935A MANUAL PDF

Hp A Pdf User Manuals. View online or download Hp A Operating And Service Manual. Operating and Service Manual. HP A. Transmission Impairment. Measuring Set. Serial Numbers. This manual applies to instruments with serial numbers. HP / Hewlett Packard / Agilent Used Oscilloscopes, Analog and Digital, Power Supplies, AC DC Power Supplies, Single Output, Multiple Dual Triple Quad.

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We have made no changes to this manual copy. Warnings, cautions and notes. All Warmngs and caut! Page Title Page Section Hhp Output Level and Transmit Monitor l-l. Charge Acceptance at Various Receiver Board Schematic Transmit Monitor Test Output Al Front Panel Schematic Diagram Model A f ransnhdon Impairment Measuring set The manual is divided into eight major sections which provide the following information: General Information Model A T a b l e l – l.

These provide typically 2.

Normal recharge time is about 17 hours. Refer to Section IV for electrical checks. If the unit is mechanically damaged or fails electrical tests, notify the yp and the nearest HP officbe listed at the rear of this manual. Hewlett-Packard will arrange for repair or replacement of the instrument without waiting for claim settlement.

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Hewlett-Packard sales and service offices listed at the rear of this manual. Include return address, model number, option number if applicable and complete serial number.

This section contains information on front and re jr panel features, self check procedures, manuzl error c-odes Err-c,otlrs. Also covered are the principles of operation for all measurements. Accepts power cord supplied with instrument. Contains line fuse and PC board for selecting line voltage see Section II, paragraph for procedure to select line voltage. Do not connect more than VDC signal to terminals.

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Lighted cursor indicates one-of-two digit positions. Digit value is inc. Output level is Adjusts the transmitter output level continuou;ly displayed on left display.

Permits adjustable volume for listening to the cirl: Always connect power cord to a properly grounded 3-wire power outlet. The A will automatically do a self check of the transmitter, the filters, and the LEDs. I,rvel can be read in the left display and frequency in the right. A sign indicates the received signal is: TRMT light will be on. There will be no values displayed because in this configuration the transmitter is turned off and a quiet termination is supplied to the TRMT jack.

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RCV light will be on. This disengages the dial circuitry and allows testing. GA are described in the following paragraphs.

Includrd arc explanations of the measurcmcnts and the effects of certain parameters on data transmissicjn.

IT,A input and output circuits are balanced to match standard voice channel lines. The message circuit measurement is obtained by measuring the noise present on a line with a quiet: The C-message filter measures noise signals that annoy the typical telephone service subscriber. The A combines th s notch with any of the five filters. Single frequency interference refers to unwanted steady tones which may appear in lines.

Single frequency tones may interfere with certain data signals, particularly narrowband signals which are multiplexed onto a voiceband channel. The 49XA uses noise-to-ground to measure the longitudinal noise present on a telephone circuit,: The transmitting A provides a quiet termination at one end of the voice channel.

The basic measurement technique used manua, the noise-to-ground measurement is very similar to the message circuit noise measurement; Performance Tests Model Tests in this section verify instrument specifications. If the instrument fails the tests, refer to the Service Section.

HP 4935A Operating And Service Manual

ISA frequency when measured with the counter is between Cheek the A transmitter at the frcqucncics given in Table Setup the A as follows: Test the A at each frequency given in Table Calibrator 1 banana plug test cable I BNC to bantina adapter: Check the response at each frequency in Table The A should be within the range given Table The A display should be within the range given.

Cheek the rcsponsc at each frcclucncy in Table The A should bc within the range given. XEA display should indicate lf counts. Connect equipment as shown in Figure F i r s t use a 9OOIl rrsistor, second a ! It should be dHm -t:! Measure distortion at the following points. Disconnect AC power from the instrument before opening the case or removing any assemblies. Power SuppI xl iurlmcnts shoulcl bc done p r i o r t o m a k i n g a n y inlcrn: Output Level and Transmit When ordering a non-listed part include the instrument model number, serial number and a description and function of the part.

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Address the order to the nearest Hewlett Keplaceahlc Parts Table MTG Screw No.

Also See for A Operating and service manual – pages. Page of Go. This manual may contain references to HP or Hewlett-Packard.

Please note that Hewlett. Packard’s former test and measurement, semiconductor products and chemical analysis. We have made no changes to this. We’ve added this manual to the Agilent website in an effort to help you support your.

This manual provides the best information we could find. It may be incomplete. If we find a better. Mmanual no longer sells or supports this product. You will find any other available. Search for the model number of this product, and the resulting product page will guide. Our service centers may be able to perform calibration. Table of Contents Add to my manuals Add. Page 15 Model Recommended Test Equipment Model A Page 20 Refer to Section IV for electrical checks.

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Operating Environment, Environment Hewlett-Packard sales and service offices listed manuxl the rear of this manual. Page 22 Installation Table Page 25 Model A Figure Page 28 Operation Model Measurements of Installation section for procedure to select line manua. Page 35 Model Sf Skip, Message Circuit Noise Measurements, Noise Measurements The message circuit measurement is obtained by measuring the noise present on a line with a quiet: Khz Flat Filter Operation Model Noise-to-ground Measurement The 49XA uses noise-to-ground to measure the longitudinal noise present on a telephone circuit,: