The Gr Series Of Synthesizers

The presently available GR synthesizers, Types 1161 -A, 1162-A and 1163-A, have digital frequency selection up to top frequencies of 100 kc s, 1 Mc s and 12 Mc s, respectively. Each instrument, when fully equipped, has seven dials adjustable in digit steps and an eighth dial adjustable continuously. Since the maximum number of digit dials is fixed, it follows that the smallest available digit step increases in size as the available top frequency increases. Thus, the Type 1161-A has digit steps...

Frequency Standard

The new standard-frequency oscillator introduced several months ago 1 and the new digital Syncronometer time comparator announced in this issue lead logically to a new General Radio frequency standard. It is called the Type 1121 Frequency and Time Standard, and it is available in any of four versions, depending on the output frequencies desired. The Type 1121-A Frequency and Time Standard includes a Type 1115-B Standard-Frequency Oscillator and a Type 1123-A Digital Syncronometer time...

Precision Time Measurements

The accurate, precise measurement and keeping of time are more than exercises for astronomers and guardians of the national standard. They are also matters of great concern to navigators, telemetry and communications specialists, data-system technologists, and many others who must establish time intervals and record local time with microsecond precision. The modern method of precise local timekeeping involves 1 the use of standard time signals such as those broadcast on WWV , 2 a...

Info

Type 1560-Type 1560-Type 1560-Type 1560- P40H Preamplifier and Power Supply Set -P40J Preamplifier and Adaptor Set -P40K Preamplifier and Microphone Set Figure 5. View of the Type 1560-P40K Preamplifier and Microphone Set with Type 1564-A Sound and Vibration Analyzer. Figure 5. View of the Type 1560-P40K Preamplifier and Microphone Set with Type 1564-A Sound and Vibration Analyzer. OSCILLATOR-POWER-SUPPLY COMBINATIONS FOR FREQUENCIES FROM 0.5 Mc s TO 2 Gc s General Radio high-frequency...

Experimenter

I 1965 GENERAL RADIO COMPANY, WEST CONCORD, MASS., U.S.A. Published Monthly by the General Radio Company VOLUME 39 NOS 11 amp 12 NOV-DEC 1965 12-Mc Coherent Decade Frequency Synthesizer 3 The OR Series of Types 874-TPDL and -TPD Power Dividers . 8 Types 874-W50BL and -W50B 50-0hm Terminations . 10 Time-Domain Applications of Coaxial Elements . 11 Measurement Briefs. The General Radio EXPERIMENTER is mailed without charge each month to engineers, scientists, technicians, and others interested in...

Preamplifier Sets

The preamplifier is sold separately or as the main component of three different sets, each consisting of the preamplifier and a group of accessories suited for a particular type of use. Adaptors supplied convert the preamplifier input connector to a 3-termi-nal, shielded, audio connector, to a GR-874 Connector, and to a connector that will receive the cartridge from a General Radio Type 1560-P3 Microphone. Cables supplied connect the preamplifier to the measuring instrument or to the power...

Coherent Decade Frequency Synthesizer

The GR family of frequency synthesizers now welcomes a new member, the 12-Ale Type 1163-A. Like its older brothers1 it uses modular construction, which allows one to order at minimum cost the degree of resolution needed for one's application and also to add increased resolution later, if needed. Other features, common to the 11 50 family, include 2-volt output, in-line readout, provision for sweeping, programmable options,2 and ac or battery operation. The Type 1163-A Coherent Decade Frequency...

Electronic Voltmeter

The Type 1806-P2 10 1 Range Multiplier attaches to the probe of Type 1806-A Electronic Voltmeter and permits the probe to be used directly for the measurement of ac voltages up to 1500 volts. In addition to its range-extension use, it can be used advantageously at all voltages at frequencies up to about 200 Mc s. Transit-time effects at these frequencies increase the input conductance of the probe often to the point where the voltmeter may constitute too great a load on the source under...

The Slotted Line

Slotted Line Diagram

The Type 900-LB Precision Slotted Line2 is the most precise coaxial impedance-measuring instrument available commercially, with a residual vswr of 1.001 0.001 gc from 300 Mc s to 9 Gc s it is, moreover, an extremely rugged, reliable instrument whose calibration can be expected to stay within specification indefinitely. The forged outer conductor joins its connectors smoothly, without the reflection-caus ing steps and discontinuities found in noncylindrical coaxial slotted lines. The...

Type Bbl Connector

A few years ago a locking version of the GR874 Connector, fully compatible with the nonlocking connector yet retaining the hermaphrodite feature, was introduced to provide an electrically and mechanically stable connection and to minimize leakage. While retaining all these characteristics, the Type 874-BBL Connector, the latest addition to the GR874 connector series, has a lower vswr over an extended frequency range, with improved reliability and repeatability of connection. The Type 874-BBL...

General Radio Company

Telephone Concord 369-4400 Boston 646-7400 Area Code Number 617 22 Baker Avenue, West Concord, Mass., 01781 Telephone 617 646-0550 Broad Avenue at Linden, Ridgefield, N. J., 07657 Telephone N. Y., 212 964-2722 N. J., 201 943-3140 Pickard Building, East Molloy Road, Syracuse, N. Y., 13211 Telephone 31 5 454-9323 Fort Washington Industrial Park, Fart Washington, Pennsylvania 19034 Telephone 21 5 646-8030 11420 Rockville Pike, Rockville, Md., 20852 Telephone 301 946-1600 113 East Colonial Drive,...

Specifications

Smallest Digital Step 1 C, S. Smallest Direct-Calibrated CAD Increment 0.01 Max Bandwidth Controllable by CAD 1 Me s. Spurious Frequency Outputs Harmonic, lt 34 dB non-harmonic, lt GO dB. Synthesizer Output 0 to 2 V, metered, behind 50 U. 0 to 2 V, metered at output receptacle after low impedance. Output-Frequency Characteristic rb 1.5 db, max, 50 c s to 12 Mc s 50-12 load. Output Terminals at front-panel binding posts and at rear BNC connectors Synthesizer...

With The Transferfunction Bridge

Accurate measurements of high-frequency transistors rapidly became commonplace after the introduction, in 1959,1 of commercially available transistor mounts for use with the Type 1607-A Transfer-Function and Immittance Bridge. These mounts, designed primarily for development applications, i W. R. Thurston, R. A. Soderman, The Type 1607-A Transfer-Function and Immittance Bridge, General Radio Exp rimenter, Vol 33 No 5, May 1959. Figure 1, One of the new transistor mounts, with transistor fully...

Output Mixer

Block diagrams of the three GR synthesizers. All operate on the same principles and use interchangeable modules. Figure 2. Block diagrams of the three GR synthesizers. All operate on the same principles and use interchangeable modules. a signal synthesized anywhere in a continuous band from 50 to 51 Mc s and a second signal generated, at 1.0-Mc increments, between 50 and 39 Mc s, inclusive. The synthesized frequency between 50 and 51 Mc s is produced in exactly the same way as in the...

Tir

The general formulas and required techniques are described fully in References 1 and 2. The Type 900-LZ Air Lines can also be used in the measurement of dielectrics. The air lines, being open at both ends, serve as convenient holders for dielectric samples fabricated in the coaxial cross-section shown in Figure 3. The electrical length and the attenuation of the dielectric-filled line can be measured with high accuracy on the Type 900-LB Slotted Line as described in the...