Agilent 11667A User Manual

User’s and Service Guide
11667A DC to 18 GHz Power Splitter
Part Number 11667-90003 Print Date: June 2001 Supersedes: November 1999 Printed in USA

Notice

The information contained i n this document is subject to change without noti ce. Agilent Technologies makes no warranty of any kind with regard to this
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© Copyright 1974, 1999, 2001 Agilent Technologies, Inc
2 User’s and Service Guide 11667- 90003

General Information

The 11667A power splitter is a two-resistor type power splitter for use in network measurements where one arm of the power splitter is used for leveling or to supply a reference signal for a ratio measurement.

Specifications

The specifications are listed in Table 1. These specifications are the performance standards or limits, against which the power splitter may be tested. The typical operating characteristics are provided in Table 2, “Typical Operating Characteristics,” on page 4. They are included as
additional information only; they are not specifications.
Table 1 11667A Specifications
Frequency (GHz)
DC to 4 4 to 8 8 to 18
Input SWR Equivalent Output SWR (Leveling or
ratio measurement) Output Tracking (between out p ut
arms)
1.≤ 1.38 for Option 002
1.15
1.10
0.15 dB 0.20 dB 0.25 dB
1.25
1.20
1.33
1.45
1
Frequency Range: DC to 18 GHz Maximum Input Power: +27 dBm
Connectors:
Type-N Female on all ports Option 001: Type-N Male on the Input and Type-N Female on the Output Ports Option 002: Type-N Female on the Input and APC-7 on the Output Ports
Dimensions: 52mm wide x 46mm high x 21.3mm deep (2.06 in. x 1.82 in. x 0.84 in.) Shipping Weight: 0.22 kg (8 oz.)
User’s and Service Guide 11667-90003 3
Table 2 Typical Operating Characteristics
DC to 4 4 to 8 8 to 18
Frequency (GHz)
Phase Tracking (between output arms), typically:
Insertion Loss: 6 dB nominal (input to either output)
0.5°
0.2,
≤−
+0.6 dB
1.5°
0.2,
≤−
+1.0 dB
3.0°
0.2,
≤−
+1.8 dB
Figure 1 Leveling or Ratio Measurement Source Match Graph
CAUTION Applying a signal greater than +27 dBm (0.5 Watts) may result in damage to the
power splitter.

Options

The standard 11667A power splitter is supplied with a female type-N on all three ports. The Option 001 provides a type-N male connector on the input and two type-N female connector s on the output ports. The Option 002 is supplied with a type- N female connector on the input and APC-7 connectors on the output ports.
Description
The 11667A is a two-resistor power splitter for use in measurement systems where one arm is an active arm. The active arm may be a leveling loop, or a reference channel of the network analyzer for making a ratio measurement.
Power splitters used for wide-frequency coverage are usually of the resistive type. The generalized form of a pow er splitter is shown in Figure 2, on page 5.
4 User’s and Service Guide 11667- 90003
Figure 2 Typical Power Splitter Diagram
For simple power-dividing, a resistance value of 16 2/3 Ω in each arm will give an output impedance of 50 Ω on any port, provided that all other ports are terminated in the characteristic impedance of 50 Ω.
A network analyzer measurement system, as shown in Figure 3, uses the recommended two-resistor type power splitter. Here R2 = R3 = 50 Ω, and R1 = 0 Ω. The two-resistor power splitter, such as model 11667A, provides a better output SWR when used in leveling or in ratio measurement applications.
Figure 3 Simplified Diagram of a Network Analyzer System
When a power splitter is used in a network analyzer system, the node at the fork of the power
splitter is kept at a fixed voltage by the AGC action of the network analyzer’s reference channel. Since this action forces the node to be held at a constant voltage, a virtual ground is present.
If a three-resistor power splitter, as shown in Figure 4, is used in leveling or ratio measurement applications, each port will have an output impedance of 16 2/3 Ω to ground. This would be a 3:1 mismatch which could cause significant measurement errors.
Figure 4 Three-Resistor Power Splitter
However, the 11667A power splitter uses two 50 resistors, as shown in Figure 5, on page 6. The network analyzer creates a virtual ground at the fork, enabling the resistance in each output arm of the power splitter to be a matched 50 ohms .
User’s and Service Guide 11667-90003 5
Figure 5 11667A Power Splitter Schematic
Although optimized for leveling or ratio measurements when used as a coupler, the power splitter still provides excellent frequency response tracking for direct power splitting applications with typically <1.8:1 SWR.
6 User’s and Service Guide 11667- 90003

Installation

Initial Inspection

Inspect the shipping container for damage . If the shipp ing container or cushioning material is damaged, it should be kept until the contents of the shipment have been checked mechanically and electrically. If the contents are incomplete , or i f there i s mechanical da mage or defects, or if the device does not meet specifications, notify the nearest Agilent office. If the shipping container is damaged, or the cushioning material shows signs of stress, notify the
carrier as well as the Agilent office. Keep the shipping materials for the carrier’s inspection. The office will arrange for repair or replacement without waiting for claim settlement.
Figure 6 Device Features
User’s and Service Guide 11667-90003 7

Storage and Shipment

Environment.
The splitter should be stored in a clean, dry environment. The following environmental limitations apply to storage and shipment:
Temperature: −40 °C to +75 °C
Humidity: <95% relative Altitude: <25,000 feet
Original Packaging.
If you need to ship the splitter for any reason, be sure to use the original (or comparable) packaging materials. If the device is being returned to Hewlett-Packard for servicing, attach a tag indicating the type of service required, return address, model number , and full serial number. Also mark the container FRAGILE to assure careful handling. In any correspondence, refer to the instr ument model number and full serial number.
8 User’s and Service Guide 11667- 90003

Operation

Environment

The operating environment should be within the following limits:
Temperature: 0 °C to +55 °C Humidity: <95% relative Altitude: <15,000 feet

Adjustments

The 11667A power splitter requires no electrical or mechanica l adjustme nts.
User’s and Service Guide 11667-90003 9

Service

Replacing the APC-7 Center Contact (Option 002 Only)

This contact is a small, four-pronged, sp ring-action contact which snaps into a recess in the center conductor. It is normally held in place by the spring-action of the four prongs. With a magnifying glass, examine the contact to determine if it needs replacement.
CAUTION Do not remove this contact for inspection. It may be damaged by removal. The contact should be free of burrs or wear and the prongs should be equally spaced. Push the
contact in with your fingernail and note the spring action. If the contact needs replacing, proceed as follows:
1. Place the power splitter so that the connector face is down.
2. Tap the pin connector lightly and the contact should protrude slightly. Insert the centering pin of the contact extractor (Part Number 5060-0236) with the jaws open. If this tool is not
available, an ordinary draftsman’s mechanical pencil may be used. (The end of the jaws may have to be filed to get a good grasp at the very end.)
3. Allow the jaws of the tool to close and pull straight away fr om the connector without twisting. The contact should come o ut with t he tool. If not, r epe at the p rocess. Do not reuse the contact.
4. Insert a new contact (Part Number 1250-0907) with the fingernail.

Troubleshooting

Troubleshooting the 11667A power splitter usually takes advantage of the fact that the circuit elements are split into two channels. Malfun ctions will usually occur in only one channel at a time. Therefore, malfunctions can be confirmed by reversing connections to the splitter.
Since the power splitter works to DC, an ohmmeter can be used to check the inner conductor connections. The resistanc e from either output center conduc tor to the input center conductor should be 50 Ω ±±2
Ω.

Ordering Information

To obtain rep lacement parts , contact the nearest Agilent T echnolo gies. T able 3 on page 11 lists the replaceable parts. Do not try to replace any parts not listed.
10 User’ s and Serv ice Guide 11667-900 03
Table 3 Replaceable Parts
Part Number Qty Description
2200-0165 6 Screw: machine 4-40 x 0.312-inch Pozidriv
flat head
Standard 11667A and Type-N Female on Option 002
1250-0549 3 Connector Type-N 1250-0915 3 Contact: center conductor Female 5040-0306 3 Insulator 5020-9108 3 Conductor: center 5020-9107 3 Conductor: outer
Model 11667A Option 001 (Male Type-N Input)
1250-2184 1 Retaining Ring 5021-1746 1 Connector Flange 1250-0916 1 Connector Body Type-N 1250-0917 1 Male Pin Type-N 1250-0918 1 Connector Nut Type-N 5020-9778 1 Center Conductor Extension
Model 11667A Option 002 (APC-7 Connectors Only)
1250-0909 2 Connector Assembly: APC-7 5021-1746 2 Connector Flange 85130-20002 2 Contact holder: center conductor 85050-20001 2 Contact: center conductor
User’s and Service Guide 11667-90003 11

Repair

CAU TION Do not open the 11667A power split ter. Opening the 11667A power splitter voids
the warranty.
Replace only the parts shown in Table 3. To replace these parts, proceed as follows:
Standard Model 11667A and Type-N Connectors on Options 001 and 002
1. Loosen and remove the two Pozidriv screws on the faulty connector. Remove the flange.
2. With a rotating motion, pull the center conductor assembly loose.
3. Use a pin vise to unscrew the two pins.
4. Replace the defective part.
5. Apply a small amount of Locktite to the threads of the contact and screw the center conductor assembly together.
6. Push the end of the conductor assembly into the connector hole while rotating the assembly. Do not force it on. It should slide on.
7. Complete the remainder of the assembly in reverse order of disassembly.
Option 002 (APC-7 Connectors)
1. With a thin 1/2-inch open wrench, remove the outer connector assembly on the faulty connector.
2. Loosen and remove the two Pozidriv screws. Remove the flange.
3. With a rotating motion, pull the center conductor assembly loose.
4. Use a pin vise to unscrew the two pins.
5. Replace the defective part.
6. Apply a small amount of Locktite to the threads of the contact and screw the center conductor assembly together.
7. Push the end of the center conductor assembly into the connector hole while rotating the assembly. Do not force it on: it should slide on.
8. Complete the remainder of the assembly in reverse order of disassembly.
12 User’ s and Serv ice Guide 11667-900 03

Contacting Agilent

By internet, phone, or fax, get assistance with all your test and measurement needs.
Online assistance: www.agilent.com/find/assist United States
(tel) 1 800 452 4844
New Zealand
(tel) 0 800 738 378 (fax) (+64) 4 495 8950
Country Phone Number Fax Number
Singapore 1-800-375-8100 (65) 836-0252 Malaysia 1-800-828-848 1-800-801664 Philippines (632) 8426802
Thailand (088) 226-008 (outside Bangkok)
Hong Kong 800-930-871 (852) 2506 9233
Latin America
(tel) (305) 269 7500 (fax) (305) 269 7599
Japan
(tel) (+81) 426 56 7832 (fax) (+81) 426 56 7840
Asia Call Center Numbers
1-800-16510170 (PLDT Subscriber Only)
(662) 661-3999 (within Bangkok)
Canada
(tel) 1 877 894 4414 (fax) (905) 282-6495
Australia
(tel) 1 800 629 485 (fax) (+61) 3 9210 5947
(632) 8426809 1-800-16510288 (PLDT Subscriber Only)
(66) 1-661-3714
Europe
(tel) (+31) 20 547 2323 (fax) (+31) 20 547 2390
Taiwan 0800-047-866 (886) 2 25456723
People’s Republic of China
India 1-600-11-2929 000-800-650-1101
800-810-0189 (preferred) 10800-650-0021
10800-650-0121
User’s and Service Guide 11667-90003 13
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