Page 2 - Notice
ii 8494/95/96G/H Operating And Service Manual Notice The information contained in this document is subject to change without notice. Agilent Technologies makes no warranty of any kind with regard to this material, including, but not limited to, the implied warranties of merchantability and fitness f...
Page 3 - What You’ll Find in This Manual...
8494/95/96G/H Operating And Service Manual iii What You’ll Find in This Manual… • Overview , page 1 • Specifications , page 6 • Installation , page 10 • Operating Instructions , page 12 • Replaceable Parts , page 15 • Service , page 16
Page 4 - Warranty; Certification
iv 8494/95/96G/H Operating And Service Manual Warranty Custom systems are warranted by contractual agreement between Agilent Technologies and the customer. Certification Agilent Technologies, Inc., certifies that this product met its published specifications at the time of shipment from the factory....
Page 5 - Service and Support; Click on “Contact Us” and select your country.; Safety and Regulatory Information; WARNING; CAUTION
8494/95/96G/H Operating And Service Manual v Service and Support Product maintenance agreements and other customer assistance agreements are available for Agilent Technologies products. Any adjustment, maintenance, or repair of this product must be performed by qualified personnel. Contact your cust...
Page 6 - Instrument Markings
vi 8494/95/96G/H Operating And Service Manual Instrument Markings Safety Earth Ground This is a Safety Class I product (provided with a protective earthing terminal). An uninterruptible safety earth ground must be provided from the main power source to the product input wiring terminals, power cord,...
Page 7 - Overview; Specification; Description
8494/95/96G/H Operating And Service Manual 1 Overview This manual contains operating instructions for the Agilent 8494G/H, 8495G/H, and 8496G/H attenuators. Included in the manual is information required to install and test these attenuators. Specification Instrument specifications are indicated in ...
Page 8 - Figure 1
2 8494/95/96G/H Operating And Service Manual Overview Figure 1 Typical Four Section Attenuator Schematic Diagram Table 1 and Table 2 on page 3 and Table 3 on page 4 show the typical switching arrangement to increase the amount of attenuation in an 8494G/H, 8495G/H, or 8496G/H in a linear manner. To ...
Page 9 - Table 2
8494/95/96G/H Operating And Service Manual 3 Overview Table 2 8495G/H Attenuator Switching Order Table 1 8494G/H Attenuator Switching Order 8494G/H Attenuator Sections Atten (dB) 1 1 dB 2 2 dB 3 4 dB 4 4 dB 0 1 X 2 X 3 X X 4 X 5 X X 6 X X 7 X X X 8 X X 9 X X X 10 X X X 11 X X X X 8495G/H Attenuator ...
Page 10 - Table 3
4 8494/95/96G/H Operating And Service Manual Overview Table 3 8496G/H Attenuator Switching Order Each solenoid requires a drive of 20 to 30 V with a switching current of approximately 125 mA * at 24 V dc per section. The solenoid switching time is less than 20 milliseconds including settling time. O...
Page 11 - Figure 2; s. Do not connect an attenuator RF input or; Instrument Options
8494/95/96G/H Operating And Service Manual 5 Overview Figure 2 Typical Solenoid Coil Driver Circuits CAUTION Do not exceed the RF power rating of 1 W average or 100 W peak with a maximum pulse width of 10 µ s. Do not connect an attenuator RF input or output connector to greater the ±7 Vdc. If the at...
Page 12 - Specifications; Frequency Range
6 8494/95/96G/H Operating And Service Manual Specifications Specifications Frequency Range and Attenuation Attenuation Accuracy (±dB): (Referenced from 0 dB) Instrument Frequency Range Attenuation 8494G dc to 4 GHz 0 dB to 11 dB in 1 dB steps 8494H dc to 18 GHz 0 dB to 11 dB in 1 dB steps 8495G dc t...
Page 13 - ±0.01 dB typical after 5 million cycles
8494/95/96G/H Operating And Service Manual 7 Specifications Maximum SWR Maximum Residual Attenuation Attenuation Repeatability ±0.01 dB typical after 5 million cycles RF Power Handling Capability 1 W average, 100 W peak with maximum pulse width of 10 microseconds (all models) Solenoid Drive Instrume...
Page 14 - Solenoid Cable Connector; Refer also to
8 8494/95/96G/H Operating And Service Manual Specifications Solenoid Cable Connector Refer also to Figure 3 . Figure 3 Solenoid Cable Pin Configuration Section Section 1 Section 2 Section 3 Section 4 Power Solenoid Coil Thru-Line Atten Card Thru-Line Atten Card Thru-Line Atten Card Thru-Line Atten C...
Page 15 - Minimum Life; >5 million cycles per section; Switching speed; Maximum 20 milliseconds including settling time.; Environment Limits
8494/95/96G/H Operating And Service Manual 9 Specifications Minimum Life >5 million cycles per section Switching speed Maximum 20 milliseconds including settling time. Environment Limits The instrument should be stored in a clean, dry environment. The following environmental limits apply to stora...
Page 16 - Installation; Initial Inspection; “Operator’s Check” on page 12; Mating Connectors; For Option 003, 7 mm mating connectors must be used (
10 8494/95/96G/H Operating And Service Manual Installation Installation Initial Inspection Inspect the shipping container for damage. If the shipping container or cushioning material is damaged, it should be kept until the contents of the shipment have been checked for completeness and the instrumen...
Page 18 - Operating Instructions; Operator’s Check; Figure 4
12 8494/95/96G/H Operating And Service Manual Operating Instructions Operating Instructions CAUTION Do not apply RF power greater than 1 W average, or 100 W peak with a maximum pulse width of 10 microseconds. If these limits are exceeded, the attenuators may be damaged. CAUTION Do not ground both so...
Page 19 - Procedure; Table 4
8494/95/96G/H Operating And Service Manual 13 Operating Instructions Procedure 1. Connect equipment as shown in Figure 4 on page 12 with the attenuator set to 0 dB attenuation. 2. Set the test oscillator to 0.3 Vrms at 1 kHz. 3. Set SWR meter range to 2 dB (expanded) [or for the 8494G/H to 10 dB (ex...
Page 20 - Performance Tests; The instrument can be tested to the accuracy of the; Adjustments
14 8494/95/96G/H Operating And Service Manual Operating Instructions Performance Tests The instrument can be tested to the accuracy of the “Specifications” on page 6 , with an automatic network analyzer or equivalent equipment of suitable accuracy. If an automatic network analyzer is available, test...
Page 21 - Replaceable Parts; Table 5
8494/95/96G/H Operating And Service Manual 15 Replaceable Parts Replaceable Parts Table 5 lists the replaceable parts which are the only parts that can be replaced without access to the interior of the instrument. If any parts not listed below need replacement, return the instrument to Agilent Techn...
Page 22 - Service; Troubleshooting; Troubleshooting consists of performing the; Repair; Replacing the 7 mm; . The disassembly and assembly instructions for the; Making the Connection; counterclockwise until the sleeve and nut disengage.
16 8494/95/96G/H Operating And Service Manual Service Service Troubleshooting Troubleshooting consists of performing the “Operator’s Check” on page 12 . If the instrument does not perform within limits, return the instrument to Agilent Technologies. Repair The only recommended field repair is replac...
Page 23 - To care for the device:; particles can degrade electrical performance.
8494/95/96G/H Operating And Service Manual 17 Service 4. Close the gap between coupling nut with the nut on the extended-sleeve connector. To disconnect: 1. Loosen the coupling nut of the connector showing the wider gold band. CAUTION Part the connectors carefully to prevent striking the inner condu...
Page 24 - Replacing Amphenol; Figure 6
18 8494/95/96G/H Operating And Service Manual Service CAUTION Do not use aromatic or chlorinated hydrocarbons, esters, ethers, terpenes, higher alcohols, ketones, or ether-alcohols such as benzene, toluene, turpentine, dioxane, gasoline, cellosolve acetate, or carbon tetrachloride. Keep exposure of ...
Page 25 - Type N Connector; Figure 7; Replacing the
8494/95/96G/H Operating And Service Manual 19 Service 3. Allow the jaws of the tool used to close and pull straight back from the connector without twisting. The contact should come with the tool. If not, repeat the process. Do not reuse the contact. 4. Snap in a new contact by pushing it in place. ...
