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Giga-tronics GT 9000 Operation & Maintenance Manual

Synthesized microwave signal generator
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Operation & Maintenance Manual
Microwave Synthesizer
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Certified Product
ISO 9001
Registra: BSI, Certification No. FM 34226, Registered 04 June 1996
Giga-tronics Incorporated
Telephone (925) 328-4650, or (800) 726-4442
Customer Service: Telephone (800) 444-2878
Model GT 9000
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Certified Process
4650 Norris Canyon Road
Web Site: www.gigatronics.com
Manual Number:
Revision:
Configuration Code:
Print Date:
September 1998
San Ramon, California 94583
Telefax (925) 328-4700
Telefax (925) 328-4702
120AM00250
C
14

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  • Page 1 September 1998 Operation & Maintenance Manual Model GT 9000 Microwave Synthesizer ......... . . Certified Product ISO 9001 .
  • Page 2 WARRANTY Giga-tronics products are warranted against defective materials and workmanship for one year from date of shipment. Giga-tronics will at its option repair or replace products that are proven defective during the warranty period. This warranty DOES NOT cover damage resulting from improper use, nor workmanship other than Giga-tronics service.

  • Page 3: Table Of Contents

    Table of Contents About This Manual ..........Conventions.
  • Page 4 GT 9000 Syntax Virtual Keystrokes ........
  • Page 5 Preface 3.3.20 Pushbutton — PC Assembly A105 ........3-33 3.3.21 Data Entry —...
  • Page 6 Series GT 9000 Microwave Synthesizers 5.3.7 Level Control Circuit ..........
  • Page 7 GT 9000 PCB Assy Set,, DWG# 120DA00750 ........
  • Page 8 Series GT 9000 Microwave Synthesizers Power Supply Circuit Schematic (A11), DWG# 120BS04650 ..... . . 7-49 100 MHz Ref PLL PC Assy (A14), DWG# 120BA06951 ......
  • Page 9 Preface A • Options __________________________________________________________ A.1 Introduction ............. . A.2 Accessory A001: Cable Kit (SMA), P/N 29847 .
  • Page 10 Series GT 9000 Microwave Synthesizers List of Figures ________________________________________________________ Figure 1-1 Power Line Connection ........
  • Page 11 2-20 Table 2-5 GT 9000 Virtual Keystrokes ......2-24 Table 2-6 Character Representations .
  • Page 12 Series GT 9000 Microwave Synthesizers Manual No. 120AM00250, Rev C, September 1998...

  • Page 13: About This Manual

    About This Manual This Operation and Maintenance Manual covers all aspects of the Giga-tronics Model GT 9000 Synthesized Microwave Signal Generator. The information required to operate, calibrate and maintain the instrument is provided. Chapter 1 — Introduction & Performance Specifications — This chapter contains a brief introduction to the instrument as well as the instrument’s performance parameters.
  • Page 14 Series GT 9000 Microwave Synthesizers Manual No. 120AM00250, Rev C, September 1998...

  • Page 15: Conventions

    Conventions The following conventions are used in this product manual. Additional conventions not included here will be defined at the time of usage. Warning WARNING The WARNING statement is enclosed in double lines and centered in the page. This calls attention to a situation, or an operating or maintenance procedure, or practice, which if not strictly corrected or observed, could result in injury or death of personnel.
  • Page 16 Series GT 9000 Microwave Synthesizers SYMBOLS Block diagram symbols frequently used in the manual are illustrated below. Course Fine STEP ATTEN Pulse YIG-Tuned Mixer Switch Step PIN-Diode Modulator Oscillator Attenuator Leveler PASS RF Level Voltage- Digital to Fixed Filter Detector...

  • Page 17: Record Of Manual Changes

    Record of Manual Changes This table is provided for your convenience to maintain a permanent record of manual change data. Corrected replacement pages will be issued as Technical Publication Change Instructions, and will be inserted at the front of the binder. Remove the corresponding old pages, insert the new pages, and record the changes here.
  • Page 18 Series GT 9000 Microwave Synthesizers Manual No. 120AM00250, Rev C, September 1998...

  • Page 19: Special Configurations

    Special Configurations When the accompanying product has been configured for user-specific application(s), supplemental pages will be inserted at the front of the manual binder. Remove this page and replace it with the furnished Special Configuration supplemental page(s). xvii Manual No. 120AM00250, Rev C, September 1998...
  • Page 20 Series GT 9000 Microwave Synthesizers xviii Manual No. 120AM00250, Rev C, September 1998...

  • Page 21: Introduction

    Complete performance specifications are described later in this chapter. The GT 9000 has a nominal weight of 43 lbs. It measures 5.25 inches high by 16.75 inches wide by 24 inches deep. Power requirements are 100/120/220/240 VAC +10%, 47-400 Hz, 250 Watts nominal.

  • Page 22: Items Furnished

    SMA output connector can be ordered as an Accessory Cable Kit, No. A001. 1.1.4 Tools and Test Equipment No special tools are required to operate the GT 9000. Test equipment required for calibration or performance verification is described in Chapter 4. 1.1.5 Cooling A cooling fan is installed in the instrument.

  • Page 23: Preparation For Reshipment

    NOTE: If you are returning an instrument to Giga-tronics for service, first contact Giga-tronics Customer Service at (800) 444-2878 or Fax at (925) 328-4702 so that a return authorization number can be assigned.

  • Page 24: Safety Precautions

    The instrument has been designed for international voltages of 100, 120, 220, or 240 VAC, +10%, at 50-400 Hz. The GT 9000 uses an internationally approved connector that includes voltage selection, fuse and filter for RFI protection.

  • Page 25: Voltage And Fuse Selection

    1.2.1 Voltage and Fuse Selection When the GT 9000 is shipped from the factory, it is set for a line voltage of 120 V for domestic destinations. The power line fuse for this setting is a 4 A 3AG Slo-Blo. If the instrument is set to operate on a 240 V power line, the fuse must be changed to a 2 A 3AG Slo-Blo.

  • Page 26: Performance Specifications

    0.5 to 15 kHz .01 to <.5 .5 to 2 >2 to <8 8 to <20 20 to 26.5 Specification applies from 2 GHz for Models GT 9000/2 - 20 and GT9000/2 - 26 Manual No. 120AM00250, Rev C, September 1998...

  • Page 27: Pm Envelope Parameters

    >15 to <20 20 to 26.5 +9.5 +7.5 Specification applies from 2 GHz for Models GT 9000/2 - 20 and GT9000/2 - 26 Incremental Level Range: -20 to +20 dBm Resolution: 0.01 dB, entry and display to -99.99 dBm (display is 0.1 dB at <-100.0 dBm).

  • Page 28: Internally Generated Pm Repetition Rate

    Model GT 9000 Microwave Synthesizer 1.3.5 Internally Generated PM Repetition Rate Repetition Rate: Range Resolution 1 Hz to 100 Hz 1 Hz 100 Hz to 1 kHz 1 Hz 1 kHz to 10 kHz 10 Hz 10 kHz to 100 kHz...

  • Page 29: Fm Envelope Parameters (Wide Or Narrow Mode)

    Introduction 1.3.10 FM Envelope Parameters (Wide or Narrow Mode) NOTE: Frequency Modulation (FM) specifications apply with Scan/AM and PM off. FM may be operated simultaneously with AM or PM. Distortion: <5% Incidental AM: <+0.2%/MHz of deviation Modulation Accuracy: +5%, at maximum deviation and a 1 kHz rate. 1.3.11 FM Envelope Parameters (Wide Mode) Max Deviation: 2.5 MHz peak (<2 GHz);...

  • Page 30: Externally Supplied Fm Envelope

    Model GT 9000 Microwave Synthesizer 1.3.15 Externally Supplied FM Envelope Waveform: Any waveform compatible with bandwidth considerations. Rate: 10 Hz to 5 MHz Sensitivity: Settable; calibrated for 1 Vp input. External FM Sensitivity RF Output Deviation at Deviation Deviation Frequency...

  • Page 31: Externally Supplied Am Envelope

    Introduction 1.3.19 Externally Supplied AM Envelope Waveform: Any waveform compatible with bandwidth considerations. Input Sensitivity: 1 Vpp for 50% depth +10% depth, at a 1 kHz rate. Depth is settable; sensitivity is calibrated for a 2 Vpp input, as shown in the table: AM Input Sensitivity Depth at Depth at...

  • Page 32: General Specifications

    Model GT 9000 Microwave Synthesizer A 50 ns wide trigger pulse output (approximately 1 V into 50 Ω), coincident with PM Sync Out: the leading edge of the pulse modulation envelope waveform. AM Sig Out: An amplitude modulation waveform output, at 2 Vpp into 1 MΩ.

  • Page 33: Operation

    Remote Programming (1026 Syntax) 2.2 The Front Panel The Model GT 9000 front panel is versatile and easy to use. It is designed with displays and fields as illustrated in Figure 2-1. Displays and fields are contained within surrounding borders, and are discussed in the following sections to identify their functions.

  • Page 34: Entry Menu

    At power-on, the Entry Menu displays the model and frequency range of the instrument (e.g., ). The last settings made before power-off remain in effect. MODEL GT 9000, 10 MHz to 26 GHz The default settings can be enabled with the Reset function (see Section 2.2.1). The default settings are minimum frequency, 0 dBm level, no modulation.

  • Page 35: Data Entry Field

    Operation 2.2.2 Data Entry Field The Data Entry field contains the following controls: • Numeric keypad • Units keys • Digi-Dial • Up/down keys • Entry On/Off • Entry Resolution • Shift • Recall/Store Figure 2-3. Data Entry Field The value of a parameter can be entered in any of three methods: The numeric keypad, the digi-dial, or the up/down keys.
  • Page 36 Entry resolution is limited only by the resolution of the instrument (e.g., in the case of a GT 9000 with 1 Hz frequency resolution, entry resolution can range from 1 Hz to the maximum frequency). Entry resolution is set independently for different functions (for example, resolution can be different for RF frequency and PM rate).

  • Page 37: Shifted Functions

    Operation 2.2.3 Shifted Functions A number of the keys in the numeric keypad have an additional use when preceded by the [SHIFT] key (see Figure 2-4). These additional uses are labeled in blue. When the [SHIFT] key is pressed, the LED to its left lights and remains on until a function key is pressed (the shift key and the function key should not be held down at the same time).
  • Page 38 However, the actual output frequency of the GT 9000 will equal the displayed value divided by the multiplication factor. The value of the multiplication factor can be entered with the keypad, the digi-dial, or the up/down keys.
  • Page 39 Press [ON] or [OFF] to enable or disable this function. HP GPIB Syntax. Press [ON] to use the normal (GT 9000) remote control command set. GT GPIB Syntax. Press [ON] to use the Giga-tronics 1026 remote control command set.

  • Page 40: Frequency

    Model GT 9000 Microwave Signal Generator 2.2.4 Frequency To set a fixed frequency output from the generator, press [FREQ] and then key the desired frequency (see Figure 2-5). For example, enter [FREQ] [2.468] [GHz] When you press [FREQ], the LED in that key turns on and the Entry Menu displays on the top line.

  • Page 41: Rf Level

    Operation 2.2.5 RF Level To set the RF power output from the signal generator, press [LEVEL]. Use the numeric keys to key in the desired power level, then press the [dBm] units key. If a negative value is desired, press the [-] key before the first value key (see Figure 2-6). For example, to set the RF level to -15 dBm, enter [LEVEL] [-] [15.5] [dBm] When you press [LEVEL], the Entry Menu displays...

  • Page 42: Pulse Modulation

    Model GT 9000 Microwave Signal Generator 2.2.6 Pulse Modulation External modulation signals are applied to the PM IN connector, which is duplicated on the front and rear panels. The Pulse Modulation function has a number of programmable modes and parameters (see Figure 2-7).
  • Page 43 Operation When RATE, WDTH or DELY is selected, the appropriate numeric value can be entered through the Data Entry field. For example, to set an internal 10 kHz rate 50 µs width pulse with a sync to output delay of 300 ns, enter [PM] [MODE] [SCROLL] [10] [kHz] [SCROLL] [50] [us] [SCROLL] [300] [ns] [ON] When you first press [PM], the Entry Menu will display the last setting.

  • Page 44: Frequency Modulation

    Model GT 9000 Microwave Signal Generator 2.2.7 Frequency Modulation Modulating signals for frequency modulation must be applied to the FM IN connector from an external source, unless Option 24 (internal modulation) is installed. The FM IN connector is duplicated on the front and rear panels.
  • Page 45 Operation [FM] [MODE] [SCROLL] [10] [kHz] [SCROLL] [300] [kHz] [ON] When you first press [FM], the Entry Menu displays the last setting. Press [MODE] repeatedly until the desired mode is displayed in the Entry Menu. Now press [SCROLL] repeatedly until RATE appears in the Entry Menu.

  • Page 46: Amplitude Modulation

    Model GT 9000 Microwave Signal Generator 2.2.8 Amplitude Modulation NOTE: Modulating signals for amplitude modulation must be applied to the AM IN connector (which is duplicated on the front and rear panels) from an external source, unless Option 24 (internal modulation) is installed.
  • Page 47 Operation [AM] [MODE] [SCROLL] [10] [kHz] [SCROLL] [30] [%] [ON] When you first press [AM], the Entry Menu will automatically show the last setting. Press [MODE] repeatedly until the desired mode is displayed in the Entry Menu. Now press [SCROLL] repeatedly until RATE is displayed in the Entry Menu. Key in the desired numeric value [10] followed by [kHz].

  • Page 48: The Rear Panel

    Model GT 9000 Microwave Signal Generator 2.3 The Rear Panel This section explains the functions on the rear panel (see Figure 2-10). Figure 2-10. The Rear Panel 2.3.1 BNCs A 5 to 6 MHz input, at 2 Vpp (input impedance is 50 Ω, nominal), for 5-6 MHz IN controlling the frequency of the signal generator;...

  • Page 49: Line Power And Fuse

    Controller No Capability Hardware Interface A standard IEEE-488 interface cable can be used to connect the GT 9000 to a controller. The 24-pin interface connector, located on the rear panel of the GT 9000, has the following pin assignments: Table 2-3. Interface Connector Pin Assignments...
  • Page 50 Section 2.2.3). The available range of addresses is 0 through 30. Command Interpretation The GT 9000 uses a 40-character buffer to accept and store characters sent to it through the interface. Spaces are ignored. The buffer contents are interpreted and the buffer is reset upon...

  • Page 51: Gt 9000 Syntax

    Giga-tronics 1026. If you select the 1026 syntax (using the GT command), you can recall the default syntax later by sending the HP command. The GT 9000 syntax is designed to make Model GT 9000 a compatible substitute for the HP 8340 in most remote-control operations. However, differences between the GT 9000 and the...

  • Page 52: Table 2-4 Gt 9000 Syntax Commands

    Model GT 9000 Microwave Signal Generator Table 2-4. GT 9000 Syntax Commands Code Operation Example Notes leveling mode, internal Select the internal ALC mode. leveling mode, external Select the external ALC mode (with a negative detector). leveling mode, power meter Select the external ALC mode (with a power meter).
  • Page 53 Set the internal FM rate to 50 kHz (Opt. 24). Giga-tronics 1026 syntax Select the 1026 syntax for the remote interface (use the HP command to return to the GT 9000 syntax, which emulates an HP 8340). increment frequency Raise the CW frequency by the minimum resolvable step.
  • Page 54 Model GT 9000 Microwave Signal Generator Code Operation Example Notes OPTC (d) output temp cal pmtr (This command is used for diagnostic purposes only.) OR (d) output power level Send the output power level. OS (2b) output status bytes (This command is not supported.)
  • Page 55 Operation Code Operation Example Notes SHRF d t unleveled SHRF Select the unleveled mode (disable automatic level control). SHS1 0 displays not blanked SHS10 Deactivate/activate the blanking of front panel displays. SHS1 1 displays blanked SHS11 SHSL d t uncouple attenuator & ALC; set SHSL10DB Uncouple the attenuator from the level attenuator in 10 dB increments...

  • Page 56: Gt 9000 Syntax Virtual Keystrokes

    (scroll, and mode) are reset to their initial state before other keystrokes modify them. Table 2-5. GT 9000 Virtual Keystrokes Virtual Keystrokes ( KK Command) in GT 9000 Syntax Code Shifted Key...

  • Page 57: 1026 Syntax Interface

    In addition to the default GT 9000 syntax, Model GT 9000 can also be remotely controlled using the 1026 syntax (Giga-tronics 1026 emulation), as described below. This syntax is selected by sending the command GT (the HP command is used to return to the GT 9000 syntax).

  • Page 58: Commands

    EXTALCzON enable external automatic level control FAzn set FA (RF output frequency) to n MHz select GT 9000 syntax (use GT command to return to the present syntax) level correction off level correction on LEVELzn set output level to n dBm (entry resolution .1 dB) LVLCRSzn set attenuator to n dB, independently of leveling loop (entry resolution: 10 dB steps);...

  • Page 59: Theory Of Operation

    The Assembly Circuit Descriptions in Section 3.3 are at component level. 3.2 General Circuit Theory The interior of the GT 9000 is divided into five main sections as illustrated in the top-view diagram in Figure 3-1. •...

  • Page 60: The Computer

    Model GT 9000 Microwave Synthesizer 3.2.1 The Computer Model GT 9000 is controlled by an internal microcomputer based on the 68000 microprocessor running at 8 MHz. The microprocessor controls and communicates with other circuits by means of a data bus system and a series of latches. This system along with the various memory devices will be referred to collectively as the computer (see Figure 3-2).

  • Page 61: The Rf Path

    In the GT 9000, most of the RF path and its circuits are incorporated into a single module. The circuits which perform path switching, filtering, coupling, amplification, pulse modulation, and level control for the fundamental outputs of the YIG oscillators are housed within this module.

  • Page 62: Figure 3-4 Phase Lock Loop Circuit, With Prescaler

    300 different integer divisors; therefore it can phase-lock 300 different frequencies to the same reference. The phase lock loops used in Giga-tronics instruments employ integrated circuit phase detectors, with external filter components and amplifiers designed to minimize the sidebands, which the output pulses of the phase detector tend to contribute to the variable frequency.

  • Page 63: Dual-Loop Indirect Synthesis

    However, this can be difficult to achieve in broad-band generators. Giga-tronics employs a dual-loop synthesis technique to produce stable and spectrally pure frequencies over a wide frequency range. The two loops are (1) the output loop, which phase-locks the synthesizer output frequency to a reference frequency, and (2) the reference loop, which phase-locks the reference frequency to the timebase.

  • Page 64: The Output Loop

    Model GT 9000 Microwave Synthesizer 3.2.5 The Output Loop Up to three fundamental YIG oscillators are needed to generate the RF output. The ranges of the individual YIGs are 2 to 8 GHz, 8 to 20 GHz, and 20 to 26.5 GHz. Frequencies up to 2 GHz are produced by downconversion (mixing and/or dividing the outputs of two oscillators to obtain an intermediate frequency).
  • Page 65 Theory of Operation Comparing the output from the divide-by-N circuit to an exact 1 MHz signal (derived from the timebase), the output PLL determines whether the mixer IF, and therefore the output loop (since the reference loop is assumed to be correct) is too high or too low in frequency, and sends to the output YIG FM coil whatever correction is needed to reduce the error.

  • Page 66: The Reference Loop

    Model GT 9000 Microwave Synthesizer 3.2.6 The Reference Loop The operation of the output loop requires a stable reference frequency that is relatively close to the RF output frequency (the limitations of the divide-by-N circuit demand that the difference between the two loops be no greater than 395 MHz). Therefore, the reference loop must accomplish the task of generating a broad range of frequencies and locking them to a single timebase.
  • Page 67 Theory of Operation The reference frequencies selected by the computer are always slightly offset from a multiple of 100 MHz. This offset is equal to either 5 MHz, or 1.667 MHz (which is 5 MHz divided by three). For example, a reference frequency of 2705 MHz is the 27th harmonic of 100 MHz, plus an offset of 5 MHz;...

  • Page 68: Table 3-1 Output & Reference Frequencies (In Mhz)

    Model GT 9000 Microwave Synthesizer Table 3-1. Output & Reference Frequencies (in MHz) 10-48 2601.667 1150-1174 4505 2000 (see note) 49-123 2701.667 1175-1199 4605 2001-2099 1905 124-198 2801.667 1200-1224 4705 2100-2199 2005 199-273 2901.667 1225-1249 4805 2200-2299 2105 274-348 3001.667...

  • Page 69: Table 3-2 Output And Ref. Frequencies To 26.5 Ghz

    Theory of Operation 7000-7099 6905 12100-11499 3701.667 18700-18999 6201.667 7100-7199 7005 11500-11799 3801.667 19000-19299 6301.667 7200-7299 7105 11800-12099 3901.667 19300-19599 6401.667 7300-7399 7205 12100-12399 4001.667 19600-19899 6501.667 7400-7499 7305 12400-12699 4101.667 19900-20000 6601.667 7500-7599 7405 12700-12999 4201.667 7600-7699 7505 13000-13299 4301.667 At 2000 MHz, the reference frequency is 7905 for instruments which include the downconverter range (<2 GHz), and 1905 for instruments which do not include this range.

  • Page 70: The Downconverter

    Model GT 9000 Microwave Synthesizer 3.2.7 The Downconverter Frequencies up to 2000 MHz are generated within the downconverter module. The 10 to 2000 MHz range of the downconverter spans more than seven octaves; in order to accommodate changes in component frequency response across so wide a range, the module is divided into multiple paths.
  • Page 71 Theory of Operation amount equal to the desired output frequency). These two signals are applied to a mixer. The IF output of the mixer (which equals the difference between the two inputs, and has a range of 40 to 2000 MHz) is applied to the second Divide-by-4 circuit, which reduces it to an output in the range of 10 to 500 MHz.

  • Page 72: Figure 3-8 Downconverter Phase Lock Loop

    Model GT 9000 Microwave Synthesizer Figure 3-8. Downconverter phase lock loop 3-14 Manual No. 120AM00250, Rev C, September 1998...

  • Page 73: Level Control

    Theory of Operation 3.2.8 Level Control RF output amplitude is controlled by a combination of fixed-step attenuation and closed-loop leveling. The RF output stage includes a step attenuator providing up to 110 dB of attenuation in 10 dB steps. Finer control of the output power level is provided by the closed loop leveling system, also referred to as Automatic Level Control or ALC.
  • Page 74 Model GT 9000 Microwave Synthesizer variable amplitude, which is applied to a reference detector. The reference signal is applied to the control input of a balanced modulator on the output of a 2.5 MHz crystal oscillator. The modulator serves as a variable attenuator, controlling the amplitude of the 2.5 MHz output. The modulated 2.5 MHz signal is applied to the reference detector, which is matched to the level...

  • Page 75: Frequency Modulation

    Theory of Operation 3.2.9 Frequency Modulation This feature is implemented by injecting a modulation signal into the output phase lock loop circuit. The modulation input is summed with the output of the loop phase detector and integrator; the combined signal drives the FM (fine tuning) coil of the YIG oscillator. Because of the modulation input, the input to the FM coil varies;...

  • Page 76: Assembly Circuit Descriptions

    3.3 Assembly Circuit Descriptions The following sections describe the circuit theory and operation of specific assemblies in the GT 9000 Microwave Synthesizer. Each section heading includes the PC assembly number as shown in the related circuit drawings. 3.3.1 Front Panel Interface — PC Assembly A1 The Front Panel Interface PC assembly interfaces the front panel and the computer.

  • Page 77: Memory - Pc Assembly A3

    Theory of Operation 3.3.3 Memory — PC Assembly A3 U1 through U4 are RAMs used by the CPU for temporary data storage. U5 through U14 are ROMs used to store the operational software. The RAMs and ROMs are 32K x 8 and are used in pairs (one for even addresses and the other used for odd), to simulate 32K x 16 as required by the 16-bit data bus.

  • Page 78: Cpu - Pc Assembly A4

    Model GT 9000 Microwave Synthesizer 3.3.4 CPU — PC Assembly A4 Y1, C3, C4, Q1, and U6A provide clocking for U1, the 68000 microprocessor chip. U2, U3, and U4 buffer the output to the I/O data bus. U5A and B make up the Power-On Reset logic. The presence of the clock is detected at U5-2.

  • Page 79: Pulse Generator - Pc Assembly A5A1

    Theory of Operation 3.3.6 Pulse Generator — PC Assembly A5A1 The pulse generator consists of the rate generator, the delay generator, and the width generator. The rate generator employs a programmable phase lock loop circuit, consisting of a 3-10 MHz VCO (U1), and two synthesizer chips (U3/U4) containing phase comparators and programmable dividers.

  • Page 80: Function Generator - Pc Assembly A6A1

    Model GT 9000 Microwave Synthesizer One side of this differential signal is buffered by U26A for output to the rear panel as the FM_SIG output. The voltage from DAC U4 and U5A controls the amplitude of the FM signal via U14, depending on the deviation selected. The output of the variable attenuator U14 is a differential signal combined by U15 to give a single signal output.

  • Page 81: Level - Pc Assembly A10

    3.3.10 Level — PC Assembly A10 The leveling scheme used in the GT 9000 series can be compared to a Phase Locked Loop. The similarities are that the leveling loop has a reference and a variable input which are compared, and the loop action adjusts the variable input (proportional to the actual unit output level) until the two inputs are balanced.

  • Page 82: Level Driver - Pc Assembly A10A1

    Model GT 9000 Microwave Synthesizer (LGAIN) pot. The output of U17B is the level voltage which goes to the level driver board (A10A1) to drive the PIN leveling diodes. The reference signal is generated on this board. The 2.4596 MHz oscillator is composed of U1 A, B, C, and Y1.

  • Page 83: Power Supply - Pc Assembly A11

    Theory of Operation module. Relays K1 and K2 bypass these filters during AM operation (the control input labeled SCAN N is on only during amplitude modulation, not scan modulation). Higher frequency bands are level-controlled by PIN diode attenuator circuits in the microwave module.

  • Page 84: 100 Mhz Reference Pll - Pc Assembly A14

    Model GT 9000 Microwave Synthesizer 3.3.13 100 MHz Reference PLL — PC Assembly A14 This circuit phase locks the 100 MHz oscillator (A201) to the internal 10 MHz timebase or to an external timebase. In addition to the loop output, it produces a lock indicator signal and a set of buffered 10 MHz outputs used as references for other loops in the instrument.

  • Page 85: Hz Pll - Pc Assembly A15

    Theory of Operation 3.3.14 1 Hz PLL — PC Assembly A15 The 1 Hz Phase Locked Loop circuit synthesizes a reference frequency programmable in fine increments. This reference is substituted for the standard timebase signal used by the reference phase lock loop. By setting the reference output from this circuit, the computer is able to specify RF frequency in 1 Hz increments.

  • Page 86: Reference / Downconverter Pll - Pc Assembly A16

    Model GT 9000 Microwave Synthesizer 3.3.15 Reference / Downconverter PLL — PC Assembly A16 Reference PLL The Reference Phase Locked Loop circuit contains the Reference PLL, and the Downconverter (or Fixed LO) PLL circuitry as well as the logic and drivers for the Downconverter filters. The Reference PLL fine tunes the reference YIG oscillator to phase lock it to a harmonic of the 100 MHz oscillator (see A201) and ultimately to the instrument timebase.
  • Page 87 Theory of Operation their drive circuitry U18 thru U25. The GENN and MEAS logic drives for the computer are provided by U29. U27 provides chip selects for various IC’s on the board and U26 and U28 serve as buffers required for computer bus interface. 3-29 Manual No.

  • Page 88: Divide-By-N - Pc Assembly A17

    Model GT 9000 Microwave Synthesizer 3.3.16 Divide-By-N — PC Assembly A17 This circuit is a programmable frequency divider. It is set by the computer with a divisor between 95 and 395. Its frequency input is the 95 to 395 MHz IF from the reference mixer. The divided IF is supplied to the output phase lock loop and should be exactly 1 MHz when the output loop is locked.
  • Page 89 Theory of Operation Example: When the divisor is to be 195 (this occurs when the IF is 195 MHz), the translators are programmed with the binary equivalent of 195 (011000011). This breaks down as 3 for the 3-bit counter (binary 011), and 24 for the 6-bit counter (binary 011000). For the first three clock cycles U11 divides the IF by 9, for a total of 3 x 9 = 27 IF cycles.

  • Page 90: Output Pll - Pc Assembly A18

    Model GT 9000 Microwave Synthesizer 3.3.17 Output PLL — PC Assembly A18 The Output Phase Locked Loop circuit compares the output of the divide-by-N circuit (A17) to a timebase-related reference signal, and fine-tunes the output YIG oscillator to stabilize the divide-by-N output at 1 MHz.

  • Page 91: Yig Driver - Pc Assembly A19

    Theory of Operation 3.3.18 YIG Driver — PC Assembly A19 The YIG Driver PC assembly consists of four YIG driver circuits (for the 2-8, 8-20, 20-26 and Reference YIG oscillators). In addition, this board holds the circuitry which generates the logic for different frequency bands, and for switching filters in RF modules.

  • Page 92: Data Entry — Pc Assembly A106

    Model GT 9000 Microwave Synthesizer 3.3.21 Data Entry — PC Assembly A106 This board holds the pushbuttons for the main power, numerical keypad, modulation buttons and the sweep marker buttons, as well as any corresponding LEDs. In addition the Intelligent HP alpha numeric displays reside on this board.

  • Page 93: Mhz Oscillator/Sampler Driver — Pc Assembly A201

    Theory of Operation 3.3.24 100 MHz Oscillator/Sampler Driver — PC Assembly A201 This module includes a 100 MHz Voltage Controlled Crystal Oscillator to drive the sampling mixers, and two identical amplifier circuits to increase the low level IF from those mixers to ECL voltage levels.
  • Page 94 Model GT 9000 Microwave Synthesizer 3-36 Manual No. 120AM00250, Rev C, September 1998...

  • Page 95: Calibration Procedures

    Chapter 1 of this manual. The recommended interval between calibrations is one year. The GT 9000 being calibrated or tested is referred to in these procedures as the UUT (unit under test). The required warm-up time before calibration or testing is 72 hours (2 hours if an external timebase is being used, or if timebase accuracy tests are not to be done).

  • Page 96: Power Supply Calibration

    Model GT 9000 Microwave Synthesizer 4.1.2 Power Supply Calibration This procedure checks power supplies at test points on PC board A11. Voltages are also verified on the motherboard, A101. On the A11 board, use a DVM and measure the following power supplies (adjust the appropriate pot if required): On A11, check TP2 for 8.0 V.

  • Page 97: Mhz Phase Lock Loop

    Calibration and Testing 4.1.3 100 MHz Phase Lock Loop Ensure that the high stability oscillator has warmed up for two hours. The warm-up time is not required if an external 10 MHz standard is used. PC boards A14 and A201 are referenced in this procedure.

  • Page 98: Yig Driver Calibration

    Model GT 9000 Microwave Synthesizer 4.1.5 YIG Driver Calibration This procedure calibrates each driver at the high and low ends of its frequency range to ensure the accuracy of the coarse and fine tuning of the YIG oscillators. PC boards A16 and A19 are referenced in this procedure.

  • Page 99: Level Calibration

    Calibration and Testing 4.1.6 Level Calibration The A10A1 board is referenced in this procedure. Some of the adjustments are on the A10 board, others are on the A10A1 piggyback board. On A10, monitor TP3 with a DVM. Check for a voltage of 3.2 V +0.01 V; adjust R48 as necessary.

  • Page 100: Am/Fm Generator Verification (Option 24 Only)

    Model GT 9000 Microwave Synthesizer 4.1.7 AM/FM Generator Verification (Option 24 only) This procedure verifies that the internal AM and FM function generators perform correctly. AM Procedure Setup: On the rear panel, connect AM SIG OUT to channel 2 on the scope. Connect a frequency counter to Channel 2 Out.

  • Page 101: Pulse Generator Verification

    Calibration and Testing 4.1.8 Pulse Generator Verification These steps verify that the pulse generator performs correctly. PM Video Out Setup: On the rear panel, connect PM VIDEO OUT to Channel 1 on the scope. On the front panel, connect RF OUT through a detector to Channel 2 on the scope. This setup is to verify that RF OUT is aligned with VIDEO OUT.

  • Page 102: Am Calibration

    Model GT 9000 Microwave Synthesizer 4.1.9 AM Calibration After verifying the AM/FM generators, use these steps to calibrate the AM output. Parts of the equipment setup can also be used in the FM calibration steps. Equipment Setup On the front panel connect an external function generator with a BNC tee connector to AM IN.

  • Page 103: Fm Calibration

    Calibration and Testing 4.1.10 FM Calibration After the AM/FM generators are verified use these steps to calibrate the FM output. Equipment Setup On the front panel, connect an external function generator with a BNC tee connector to FM IN. Connect a scope to the BNC tee at channel 1. Ensure that the scope displays a clean sine wave.

  • Page 104: Spectral Purity

    Model GT 9000 Microwave Synthesizer 4.1.11 Spectral Purity Select 2.1 GHz. Connect a spectrum analyzer to RF OUT on the front panel. On the A18 PC board, adjust balance pot R8 for minimum 1MHz sidebands. 4.1.12 10 MHz Time Base The following steps check and calibrate the 10 MHz reference time base.

  • Page 105: Performance Tests

    Calibration and Testing 4.2 Performance Tests The procedures in this section are used to verify the electrical performance of GT 9000, using the specifications in Chapter 1. 4.2.1 Equipment Required Each of the Performance Test Procedures in this section includes a list of recommended test equipment.

  • Page 106: Frequency Range, Resolution And Accuracy

    Model GT 9000 Microwave Synthesizer 4.2.5 Frequency Range, Resolution and Accuracy Specification Range: From .01, .5, or 2 GHz to 20 or 26.5 GHz Resolution: 1 kHz (1 Hz with Option 16) Accuracy: Same as time base accuracy Description The output of the UUT is connected to the input of a frequency counter. The internal time base of the counter is a reference for the UUT to eliminate time base errors from the measurements.
  • Page 107 Calibration and Testing If the UUT includes the 1 Hz resolution option, perform this test. This test exercises the 1 Hz through 100 kHz digits in such a manner that any incorrect digital programming data being sent to the 1 Hz Resolution assembly will be detected. Improper operation of the 1 Hz assembly will also be indicated.

  • Page 108: Spurious Signals Tests

    Model GT 9000 Microwave Synthesizer 4.2.6 Spurious Signals Tests Specification Harmonics: 40 dBc, .01 to .1 GHz -50 dBc, >.1 to 2 GHz -65 dBc, >2 to 26.5 GHz For 2-20 or 26 GHz instruments: -65 dBc, 2 to 20 GHz or 2 to 26.5 GHz...
  • Page 109 (from the GT 9000, for example) at the spurious frequency. The digi-dial of the GT 9000 may generate some noise spikes when it is rotated. The acquisition of the various phase lock loops in the instrument can also cause transients (within the specified settling time).

  • Page 110: Figure 4-3 Single-Sideband Phase Noise

    Model GT 9000 Microwave Synthesizer 4.2.7 Single Sideband Phase Noise Specification Frequency Offset from Carrier 100 Hz 1 kHz 10 kHz 100 kHz 1 MHz 250 MHz -122 -135 500 MHz -127 -135 2 GHz -125 -130 6 GHz -115...

  • Page 111: Figure 4-4 Rf Output Power Tests

    Calibration and Testing 4.2.8 RF Output Power Tests Specification Maximum Leveled Output: Frequency Standard With Option 26 Range (GHz) (dBm) (dBm) .01 to 2 >2 to <8 8 to 15 >15 to 20 20 to 26.5 For 2-20 and 2-26 GHz instruments: 2 to <8 Minimum Output Level: -10 dBm (-20 typical);...
  • Page 112 Model GT 9000 Microwave Synthesizer Procedure Connect the power sensor to the UUT. Disable the leveling system of the UUT. Step the frequency across the particular instrument operating range in 50 MHz increments. At each point measure the power, apply the appropriate sensor correction factor, and plot the result.

  • Page 113: Figure 4-5 Pulse Modulation On/Off Ratio Test

    >80 dB Description The GT 9000 is set to a CW frequency at a power level of 0 dBm. A spectrum analyzer is used to view the signal. The pulse modulation is then enabled and the resulting waveform is measured.

  • Page 114: Pulse Modulation Rise And Fall Time Test

    Rise/fall Time: <10 ns Description A crystal detector is connected to the GT 9000, terminated in 50 Ω, and monitored with an oscilloscope. NOTE: It is very important to use either the specified detector or one with similar rise-time characteristics. Even when terminated in 50 Ω with a short cable, the detector parameters can markedly influence the measurement.

  • Page 115: Pulse Modulation Overshoot And Settling Time

    <100 ns to within 1 dB Description A crystal detector is connected to the GT 9000, terminated in 50 Ω, and monitored with an oscilloscope. NOTE: It is very important to use either the specified detector or one with similar rise-time characteristics.
  • Page 116 Model GT 9000 Microwave Synthesizer Change the level setting of the UUT by plus and minus 2 dB and note the graticule position of the pulse on level. Return to the original level. Measure and record any undershoot/overshoot of the signal.

  • Page 117: Figure 4-8 Pulse Modulation Accuracy Test

    Calibration and Testing 4.2.12 Pulse Modulation Accuracy Test Specification Leveled Pulsed Output Power (referenced to leveled, unmodulated output power): +.5 dB, typical (> 100 ns pulse width) +1 dB, typical (< 100 ns pulse width) Equipment Required Oscilloscope Crystal detector Figure 4-8.

  • Page 118: Figure 4-9 Internal Pulse Generator Tests

    Model GT 9000 Microwave Synthesizer 4.2.13 Internal Pulse Generator Tests Specifications Repetition Rate Accuracy: + .02% of range maximum value Delay Accuracy: The greater of: +1% of setting, or 20 ns. Width Accuracy: The greater of: +1% of setting, or 20 ns.

  • Page 119: Frequency Modulation Tests

    Calibration and Testing 4.2.14 Frequency Modulation Tests Specifications Maximum Deviation (wide mode): 2.5 MHz peak (<2 GHz); 10 MHz peak (>2 GHz). For 2-20 or 2-26.5 GHz instruments: 10 MHz peak (>2 GHz). Deviation Flatness (wide mode): +2dB for rates from 10 Hz to 1 MHz; +3 dB for rates from 1 to 5 MHz.
  • Page 120 Model GT 9000 Microwave Synthesizer Connect the FM test fixture to the RF OUT connector of the UUT. Monitor the mixer output with the oscilloscope (5 mV/div). For each test data sheet frequency, set the UUT to the closest null frequency (that is, at a frequency where the mixer output voltage is zero);...

  • Page 121: Figure 4-11 Internal Modulation Generator Tests

    Calibration and Testing 4.2.15 Internal Modulation Generator Tests (Option 24 Only) Specification Range: 10 Hz to 1 MHz Accuracy: +.01 Hz Resolution: 1 Hz Waveforms: Sine, square, triangle Description The output of each of the internal modulation generators (AM and FM) is connected to the frequency counter where the frequency range, resolution and accuracy is tested.
  • Page 122 Model GT 9000 Microwave Synthesizer 4-28 Manual No. 120AM00250, Rev C, September 1998...
  • Page 123 Calibration and Testing Model GT 9000 Test Data Sheet, p. 1 of 4 Serial Number: Under Test Result record measured values (if any). In the case of a function check or Date: range check, write OK to indicate that the Tested By: unit under test meets specifications.
  • Page 124 Model GT 9000 Microwave Synthesizer Model GT 9000 Test Data Sheet, p. 2 of 4 Serial Number: Tested By: Date: Quality Assurance: Single Sideband Phase Noise (dBc/Hz) Frequency Offset from Carrier (MHz) 100 Hz 1 kHz 10 kHz 100 kHz 1 MHz 1513.425...
  • Page 125 Calibration and Testing Model GT 9000 Test Data Sheet, p. 3 of 4 Serial Number: Tested By: Date: Quality Assurance: Pulse Generator Tests — Rate Rate Set Tolerance Measured 50 Hz 49.98 - 50.2 500 Hz 499.8 - 500.2 5 kHz 4.998 - 5.002...
  • Page 126 Model GT 9000 Microwave Synthesizer Model GT 9000 Test Data Sheet, p. 4 of 4 Serial Number: Tested By: Date: Quality Assurance: Frequency Modulation Tests Parameter @ 1 GHz @ 4 GHz @ 12 GHz @ 22 GHz Deviation (5.7-6.3 div)

  • Page 127: Introduction

    The air inlet screen should be cleaned whenever a noticeable amount of dirt has accumulated. During the warranty period of the GT 9000, it is recommended that no user initiated service work be performed without first communicating with the factory (or our authorized representative).

  • Page 128: Malfunctions

    LEVEL indicator may or may not be lit. Recommendations: Before proceeding, be sure that the selected RF level is within the capability of the GT 9000. Although it must meet a maximum power specification, the actual maximum will be somewhat in excess of this, and will vary for different frequencies.
  • Page 129 Maintenance Check the level control circuit (see Section 5.3.7). Manual No. 120AM00250, Rev C, September 1998...

  • Page 130: Output Frequency Unlocked

    Model GT 9000 Microwave Synthesizer 5.2.4 Output Frequency Unlocked Symptoms: The LOCK indicator on the front panel is dark whenever any phase lock loop circuit is unlocked. The output frequency will drift; the degree of frequency error depends on where the fault is.

  • Page 131: Output Locked, But Frequency Incorrect

    Maintenance 5.2.5 Output Locked, but Frequency Incorrect Symptoms: The LOCK indicator is illuminated; the output frequency is stable, but incorrect. Recommendations: The troubleshooting procedure is the same as for the unlocked condition described in Section 5.2.4. The same circuits are likely to be at fault, even if there is no indication of unlock; the problem may be caused by improper control or reference inputs rather than by complete circuit failure.

  • Page 132: Troubleshooting Notes

    5.3 Troubleshooting Notes 5.3.1 Power Supply This is the common denominator among malfunctions of all types. Because the GT 9000 has many regulated supplies, and they are not all used by all circuits, it is possible for the failure of a single supply to disable only a part of the system.

  • Page 133: Table 5-2 Switching Power Supply Module

    Maintenance Power supplies that originate within the switching power supply module are listed in Table 5-2 (the locations cited are convenient measurement points, not points of origin). Table 5-2. Switching Power Supply Module Supply Measurement Point Application +24 V A13-89 YIG oscillators, analog circuits, relay drivers for the step attenuator -5 V A13-95...

  • Page 134: Db Step Attenuator (Option 26)

    Model GT 9000 Microwave Synthesizer 5.3.2 The Computer All functions are controlled by the computer, and a general computer failure will lead to a general system failure. The computer is based on the Motorola 68000 microprocessor. It uses a bus architecture which corresponds on a one-to-one basis with the signals from and to the 68000 chip.

  • Page 135: Yig Oscillator

    Maintenance 5.3.4 YIG Oscillator All YIG oscillators require +15 V and +24 V supplies; some may also require a -5 V supply. In addition to the power supply requirements, the YIG oscillator must have current supplied to its tuning coil within an appropriate range in order to generate an RF output of any kind. If tuning coil current is excessive or insufficient, there will be no signal, and the front panel LOCK LED will not be lit.

  • Page 136: Detector

    Model GT 9000 Microwave Synthesizer Table 5-4. Microwave Module Control Biases Normal Bias Voltages for Microwave Module Pins Module Pin Bias Origin (at 0 dBm out, no modulation) (at 1 GHz out) (at 5 GHz out) (at 15 GHz out)

  • Page 137: Level Control Circuit

    Maintenance Corrective Action Be sure that the correct leveling mode is activated (external ALC should not be enabled unless an external detector is in use). A failure of the internal detector is unlikely, but it is important to verify that the detector signal is in fact being received by the level control board (A10).

  • Page 138: Output Phase Lock Loop

    Model GT 9000 Microwave Synthesizer 5.3.8 Output Phase Lock Loop This circuit is located on the A18 PC board. Corrective Action Verify that the coarse tuning of the YIG is not pushing the frequency out of the control range of the PLL. Remove the A18 board, and check the RF output with a frequency counter;...

  • Page 139: Yig Driver

    Maintenance 5.3.10 YIG Driver This circuit is located on the A19 PC board. Corrective Action If this circuit is tuning the YIG oscillator to the wrong frequency, the error may be too large for the output PLL to correct. The problem sometimes occurs after incorrect adjustment of the MIN and MAX pots, in which case the output loop may be able to lock at some frequencies but not others.

  • Page 140: 100 Mhz Pll

    Model GT 9000 Microwave Synthesizer 5.3.12 100 MHz PLL This circuit is located on the A14 PC board. Corrective Action Verify that the 10 MHz master reference input is being received. Verify that the 100 MHz input is being received.

  • Page 141: Reference Mixer

    Maintenance 5.3.17 Reference Mixer The mixer is located inside the microwave module. The IF output from the mixer is furnished to the Divide-by-N circuit; the RF and LO inputs to the mixer are also present at measurable levels on this IF output, so all three signals can be checked at the same place. Corrective Action Remove the Output PLL PC board, A18 (this disables the YIG FM coil).
  • Page 142 Model GT 9000 Microwave Synthesizer 5-16 Manual No. 120AM00250, Rev C, September 1998...

  • Page 143: Gt9000/.01-20 Microwave Signal Generator

    Parts Lists 6.1 Introduction This chapter contains the parts lists for all major and minor assemblies in the Model GT 9000 Microwave Synthesizer. Section 6-2 contains a list of manufacturers. GT9000/.01-20 MICROWAVE SIGNAL GENERATOR, Rev: C Item Part Number Cage Mfr’s Part Number...

  • Page 144: Gt9000/2-20 Microwave Signal Generator

    Model GT 9000 Microwave Synthesizer GT9000/2-20 MICROWAVE SIGNAL GENERATOR, Rev: C Item Part Number Cage Mfr’s Part Number Description 120AA14300 58900 120AA14300 ACCESSORIES ASY 120BA13900 58900 120BA13900 4 CONN MTG PLATE ASY 120DA00520 58900 120DA00520 2-20 GHZ FREQ ASSY 120DA00750...

  • Page 145: Da00952 Gt9000 Chassis W/ Sw Ps

    Parts Lists 120DA00952 GT9000 CHASSIS W/ SW PS, Rev: G Item Part Number Cage Mfr’s Part Number Description 120DF03700 58900 120DF03700 SIDE GUSSET 120DF03601 58900 120DF03601 COMPUTER CHASSIS 7XXX 120CF01700 58900 120CF01700 CARD CAGE REAR WALL 120CF02100 58900 120CF02100 CARD CAGE FRONT WALL 120DF02400 58900 120DF02400...

  • Page 146: Da11052 Gt9000 R/P Asy For Sw Ps

    Model GT 9000 Microwave Synthesizer 120DA11052 GT9000 R/P ASY FOR SW PS, Rev: F Item Part Number Cage Mfr’s Part Number Description 30246 58900 30246 CHASSIS WIRELIST FOR SW P/S 30237 58900 30237 REAR PANEL GT9000/S (VDE) JLFF-16250 05245 6EDL4C...

  • Page 147: Ca16450 Gt9000/S Front Panel Out

    Parts Lists 120CA16450 GT9000/S FRONT PANEL OUT, Rev: A Item Part Number Cage Mfr’s Part Number Description WCAS-18003 58900 WCAS-18003 3" 18GHZ SEMI-FLEX COAX 107BF01700 58900 107BF01700 SMA CONNECTOR MOUNT FLAN 107BF01701 58900 107BF01701 SMA CONNECTOR MOUNT SPAC JRAB-00200 96341 2784-5002-00 SMA F BULK MT CONN HNKS-44004...

  • Page 148: Da00501 .01-26 Ghz Freq Assy

    Model GT 9000 Microwave Synthesizer 120DA00501 .01-26 GHZ FREQ ASSY, Rev: F Item Part Number Cage Mfr’s Part Number Description 420DA46900 58900 420DA46900 GT9000 STD MICROWAVE DEC MCD3-00226 62331 2616SE 1.7-26.5 GHZ DIRECTIONAL DET 420BF41401 58900 420BF41401 DIR DETECTOR MT;GT9000/S...

  • Page 149: Da00510 .5-20 Ghz Freq. Assy

    Parts Lists 120DA00510 .5-20 GHZ FREQ. ASSY, Rev: H Item Part Number Cage Mfr’s Part Number Description 120AW00500 58900 120AW00500 20 GHz FREQ ASSY W/L 420DA46900 58900 420DA46900 GT9000 STD MICROWAVE DEC MCD0-00120 62331 200520016E 0.5-20 GHZ DIR DET/REF 420BF41401 58900 420BF41401 DIR DETECTOR MT;GT9000/S...

  • Page 150: Da00520 2-20 Ghz Freq Assy

    Model GT 9000 Microwave Synthesizer 120DA00520 2-20 GHZ FREQ ASSY, Rev: J Item Part Number Cage Mfr’s Part Number Description JRAT-00050 96341 2001-6113-00 50 OHM SMA TERMINATION 120AW00500 58900 120AW00500 20 GHz FREQ ASSY W/L 420DA46900 58900 420DA46900 GT9000 STD MICROWAVE DEC...

  • Page 151: Da46900 Gt9000 Std Microwave Dec

    Parts Lists 420DA46900 GT9000 STD MICROWAVE DEC, Rev: E Item Part Number Cage Mfr’s Part Number Description CE25-R7220 0H1N5 CEBSM1E221M 220UF 25V RADIAL LAD0-06470 91637 IMS-5 47UH 10% 47 UH INDUCTOR MYYT-00209 24539 S080-1342 1.9-8.7 GHZ YIG XSTR OSC MYYT-30820 0RN63 MLOS-1165 8-20GHZ YIG XSTR OSC...

  • Page 152: Ghz Subassy

    Model GT 9000 Microwave Synthesizer 30413 .01-26.5 GHz SUBASSY, Rev: C Item Part Number Cage Mfr’s Part Number Description 30412 58900 30412 .01-26GHz ASSY HOUSING 001BF05006 58900 001BF05006 MODULE LABEL 004BA34210 JRAP-00000 58900 JRAP-00000 SMA SEALPLUG 0052331101 ——- 0052331101 2-26 GHz MIXER PCB...

  • Page 153: Parts Lists

    Parts Lists 30413 .01-26.5 GHz SUBASSY, Rev: C Item Part Number Cage Mfr’s Part Number Description TCB0-00004 59365 M3X1622 .4PF BEAM LEAD CAPACITOR TCB0-00004 59365 M3X1622 .4PF BEAM LEAD CAPACITOR TCC2-00018 55153 C11CF1R8B5TXL 1.8PF CHIP CAPACITOR TDPC-01010 17540 CSB-7151-74 0.01 CHIP PIN DIODE TDPC-01010 17540 CSB-7151-74...
  • Page 154 Model GT 9000 Microwave Synthesizer 30413 .01-26.5 GHz SUBASSY, Rev: C Item Part Number Cage Mfr’s Part Number Description JRAF-00000 2J899 9930-0431-6420 SMA SPARKPLUG JRAF-00000 2J899 9930-0431-6420 SMA SPARKPLUG JRAF-00000 2J899 9930-0431-6420 SMA SPARKPLUG JRAF-00000 2J899 9930-0431-6420 SMA SPARKPLUG JRAF-00000...

  • Page 155: Ba34700 Gt9000/S .01-2 Downc Asy

    Parts Lists 30413 .01-26.5 GHz SUBASSY, Rev: C Item Part Number Cage Mfr’s Part Number Description LFT0-83212 59660 4205-038 FEED THRU FILTER 15A LFT0-83212 59660 4205-038 FEED THRU FILTER 15A TSP0-10026 96341 MA4SW110 SPST MONOLITHIC SWITCH TSP0-10026 96341 MA4SW110 SPST MONOLITHIC SWITCH TSP0-10026 96341 MA4SW110...

  • Page 156: Da11250 Gt9000 Bench Mt Dress

    Model GT 9000 Microwave Synthesizer 120DA11250 GT9000 BENCH MT DRESS, Rev: B Item Part Number Cage Mfr’s Part Number Description 120DF04902 58900 120DF04902 BEZEL,PAINTED 120CF04110 58900 120CF04110 SIDE TRIM, PAINTED 120CF04450 58900 120CF04450 TOP COVER 120DA04550 58900 120DA04550 BOTTOM COVER ASY 120CF11310 ——-...

  • Page 157: Ba01300 Front Panel I/F Pca (A1)

    Parts Lists 120BA01300 FRONT PANEL I/F PCA (A1), Rev: C Item Part Number Cage Mfr’s Part Number Description 120CF01300 58900 120CF01300 FRONT PANEL I/F PCB ETST-06224 58900 ETST-06224 TURRET TERMINAL JSP0-10028 09769 2-641615-1 28 PIN DIP SOCKET CC50-03100 54583 RD30HX7R103K .01 UF CERAMIC X7R CC50-03100 54583...

  • Page 158: Ba05300 Ieee / Timer Pca (A2)

    Model GT 9000 Microwave Synthesizer 120BA05300 IEEE / TIMER PCA (A2), Rev: B Item Part Number Cage Mfr’s Part Number Description 120CF05300 58900 120CF05300 IEEE / TIMER PCB ETST-06224 58900 ETST-06224 TURRET TERMINAL CE25-R6470 61058 ECEA1EU470 47 UF 25V RADIAL LEAD...

  • Page 159: Ba01200 Memory Pca (A3)

    Parts Lists 120BA01200 MEMORY PCA (A3), Rev: D Item Part Number Cage Mfr’s Part Number Description 120BS01200 58900 120BS01200 MEMORY SCH 120CF01200 58900 120CF01200 MEMORY PCB JSP0-10028 09769 2-641615-1 28 PIN DIP SOCKET CC50-03100 54583 RD30HX7R103K .01 UF CERAMIC X7R CC50-03100 54583 RD30HX7R103K...

  • Page 160: Ba01100 Cpu Pca (A4)

    Model GT 9000 Microwave Synthesizer 120BA01100 CPU PCA (A4), Rev: C Item Part Number Cage Mfr’s Part Number Description 120CF01100 58900 120CF01100 CPU PCB ETST-06224 58900 ETST-06224 TURRET TERMINAL CC50-00330 31433 C315C330J2G5CA C9248 33 PF CERAMIC NPO CE25-R6470 61058 ECEA1EU470...

  • Page 161: Ba09303 Pulse Driver Pca (A5)

    Parts Lists 120BA09303 PULSE DRIVER PCA (A5), Rev: E Item Part Number Cage Mfr’s Part Number Description 120BS09303 58900 120BS09303 PULSE DRIVER SCH 120CF09303 58900 120CF09303 PULSE DRIVER PCB ETST-06224 58900 ETST-06224 TURRET TERMINAL CC50-03100 54583 RD30HX7R103K .01 UF CERAMIC X7R CC50-03100 54583 RD30HX7R103K...
  • Page 162 Model GT 9000 Microwave Synthesizer 120BA09303 PULSE DRIVER PCA (A5), Rev: E Item Part Number Cage Mfr’s Part Number Description RN55-31000 91637 RN55C1003F 100 K OHMS 1% MET FILM RN55-01820 91637 RN55C1820F 182 OHMS 1% MET FILM RN55-12210 91637 RN55C2211F 2.21 K OHMS 1% MET FILM...

  • Page 163: Ba12550 Gt9000 Pulse Generator (A5A1)

    Parts Lists 120BA12550 GT9000 PULSE GENERATOR (A5A1), Rev: A Item Part Number Cage Mfr’s Part Number Description 120BS12550 58900 120BS12550 PULSE GENERATOR; GT9000 120CF12500 58900 120CF12500 PULSE GENERATOR PCB ETST-06224 58900 ETST-06224 TURRET TERMINAL HSTS-44005 55566 3048-B-440-A-0 5/16 ROUND SWAGE SPACER WSTD-24900 58900 WSTD-24900...
  • Page 164 Model GT 9000 Microwave Synthesizer 120BA12550 GT9000 PULSE GENERATOR (A5A1), Rev: A Item Part Number Cage Mfr’s Part Number Description RN55-02210 91637 RN55C2210F 221 OHMS 1% MET FILM RN55-21000 91637 RN55C1002F 10 K OHMS 1% MET FILM RN55-21000 91637 RN55C1002F...

  • Page 165: Ba09401 Am/Fm Driver Pca (A6)

    Parts Lists 120BA09401 AM/FM DRIVER PCA (A6), Rev: C Item Part Number Cage Mfr’s Part Number Description 120BS09401 58900 120BS09401 AM/FM DRIVER SCH 120CF09400 58900 120CF09400 AM/FM DRIVER PCB ETST-06224 58900 ETST-06224 TURRET TERMINAL CC50-00330 31433 C315C330J2G5CA C9248 33 PF CERAMIC NPO CC50-00330 31433 C315C330J2G5CA C9248...
  • Page 166 Model GT 9000 Microwave Synthesizer 120BA09401 AM/FM DRIVER PCA (A6), Rev: C Item Part Number Cage Mfr’s Part Number Description RN55-14990 91637 RN55C4991F 4.99 K OHMS 1% MET FILM RN55-14990 91637 RN55C4991F 4.99 K OHMS 1% MET FILM RN55-14990 91637 RN55C4991F 4.99 K OHMS 1% MET FILM...
  • Page 167 Parts Lists 120BA09401 AM/FM DRIVER PCA (A6), Rev: C Item Part Number Cage Mfr’s Part Number Description ULN0-00539 24355 AD539JD AD539 LINEAR MULT/DIVIDR UFN0-00842 24355 AD842JN AD842 80 MHZ OP AMP UTN0-01382 01295 74HC138N 74HC138 DECODER/DEMULTIP UTN0-02732 01295 74HC273N 74HC273;OCTAL D-TYPE F-F UTN0-02732 01295 74HC273N...

  • Page 168: Ba47500 Gt9000 Level Pca (A10)

    Model GT 9000 Microwave Synthesizer 420BA47500 GT9000 LEVEL PCA (A10), Rev: D Item Part Number Cage Mfr’s Part Number Description 420BS47500 58900 420BS47500 LEVEL SCH; GT9000 420CF47500 58900 420CF47500 LEVEL PCB; GT9000 ETST-06224 58900 ETST-06224 TURRET TERMINAL HQIP-00180 32559 104-020 PERM-O-P...
  • Page 169 Parts Lists 420BA47500 GT9000 LEVEL PCA (A10), Rev: D Item Part Number Cage Mfr’s Part Number Description CC50-03100 54583 RD30HX7R103K .01 UF CERAMIC X7R CC50-03100 54583 RD30HX7R103K .01 UF CERAMIC X7R CC50-03100 54583 RD30HX7R103K .01 UF CERAMIC X7R CC50-00680 31433 C315C680J2G5CA 68 PF CERAMIC NPO DSA0-04148...
  • Page 170 Model GT 9000 Microwave Synthesizer 420BA47500 GT9000 LEVEL PCA (A10), Rev: D Item Part Number Cage Mfr’s Part Number Description RN50-21000 91637 RN50C1002F 10.0 K OHMS 1% MET FILM RN50-21000 91637 RN50C1002F 10.0 K OHMS 1% MET FILM RN50-21000 91637 RN50C1002F 10.0 K OHMS 1% MET FILM...

  • Page 171: Ba50500 Level Driver Am 9000 Pca (A10A1)

    Parts Lists 420BA50500 LEVEL DRIVER AM 9000 PCA (A10A1), Rev: C Item Part Number Cage Mfr’s Part Number Description 420BS50500 58900 420BS50500 LEVEL DRIVER AM 9000 SCH 420BF50501 58900 420BF50501 LEVEL DRIVER AM 9000 PCB ETSB-06216 58900 ETSB-06216 BIFURCATED TERMINAL HSTS-44005 55566 3048-B-440-A-0...
  • Page 172 Model GT 9000 Microwave Synthesizer 420BA50500 LEVEL DRIVER AM 9000 PCA (A10A1), Rev: C Item Part Number Cage Mfr’s Part Number Description JIA2-20105 55322 TSW-110-05-G-D 20 PIN STRIPLINE PLUG QBNS-02222 04713 2N2222A PN2222 .5A 30V NPN RN55-11000 91637 RN55C1001F 1 K OHMS 1% MET FILM...

  • Page 173: Ba04650 Power Supply Pca (A11)

    Parts Lists 420BA50500 LEVEL DRIVER AM 9000 PCA (A10A1), Rev: C Item Part Number Cage Mfr’s Part Number Description UFN0-00072 01295 TL072CP TL072CP DUAL FET OP AMP UFN0-00072 01295 TL072CP TL072CP DUAL FET OP AMP UFN0-00844 24355 AD844AN AD844AN;OP AMP UFN0-00072 01295 TL072CP...

  • Page 174: Ba06951 100 Mhz Pll Pca (A14)

    Model GT 9000 Microwave Synthesizer 120BA04650 POWER SUPPLY PCA (A11), Rev: D Item Part Number Cage Mfr’s Part Number Description RN50-31500 91637 RN50C1503F 150 K OHMS 1% METAL FILM RN50-27500 91637 RN50C7502F 75.0 K OHMS 1% MET FILM RN50-16980 91637 RN50C6981F 6.98 K OHMS 1% MET FILM...
  • Page 175 Parts Lists 120BA06951 100 MHz PLL PCA (A14), Rev: B Item Part Number Cage Mfr’s Part Number Description CC50-03100 54583 RD30HX7R103K .01 UF CERAMIC X7R CE25-R6470 61058 ECEA1EU470 47 UF 25V RADIAL LEAD CC50-02100 04222 SR155C122MAT .001 UF CERAMIC Y5P CC50-03100 54583 RD30HX7R103K...
  • Page 176 Model GT 9000 Microwave Synthesizer 120BA06951 100 MHz PLL PCA (A14), Rev: B Item Part Number Cage Mfr’s Part Number Description RN50-31000 91637 RN50C1003F 100 K OHMS 1% MET FILM RN50-11000 91637 RNC50H1001F 1.00 K OHMS 1% MET FILM RN55-01000...

  • Page 177: Ba08800 1 Hz Pll Pca (A15)

    Parts Lists 120BA08800 1 HZ PLL PCA (A15), Rev: J Item Part Number Cage Mfr’s Part Number Description 120CF08800 58900 120CF08800 1 HZ PLL PCB 101CF38200 58900 101CF38200 1 HZ BOTTOM SHIELD 101CF38100 58900 101CF38100 1 HZ TOP SHIELD 101BF38000 58900 101BF38000 1 HZ TOP SHIELD COVER...
  • Page 178 Model GT 9000 Microwave Synthesizer 120BA08800 1 HZ PLL PCA (A15), Rev: J Item Part Number Cage Mfr’s Part Number Description CC50-03100 54583 RD30HX7R103K .01 UF CERAMIC X7R CC50-03100 54583 RD30HX7R103K .01 UF CERAMIC X7R DVA0-00109 26629 KV3901 MV109 6-30 PF DIODE...
  • Page 179 Parts Lists 120BA08800 1 HZ PLL PCA (A15), Rev: J Item Part Number Cage Mfr’s Part Number Description RN50-21000 91637 RN50C1002F 10.0 K OHMS 1% MET FILM RN50-16980 91637 RN50C6981F 6.98 K OHMS 1% MET FILM RN50-14990 91637 RN50C4991F 4.99 K OHMS 1% NET FILM RN50-11000 91637 RNC50H1001F...

  • Page 180: Ba07000 Ref/Dc Pll Pca (A16)

    Model GT 9000 Microwave Synthesizer 120BA07000 REF/DC PLL PCA (A16), Rev: E Item Part Number Cage Mfr’s Part Number Description 120BS07000 58900 120BS07000 REF/DC PLL SCH 120CF07000 58900 120CF07000 REF/DC PLL PCB CC50-03100 54583 RD30HX7R103K .01 UF CERAMIC X7R CC50-03100...
  • Page 181 Parts Lists 120BA07000 REF/DC PLL PCA (A16), Rev: E Item Part Number Cage Mfr’s Part Number Description JRBM-00101 09769 903-373J-51A SMB M RTANG PC MOUNT JRBM-00101 09769 903-373J-51A SMB M RTANG PC MOUNT JRBM-00101 09769 903-373J-51A SMB M RTANG PC MOUNT LAD0-08120 91637 IMS 5 1200 UH 10...
  • Page 182 Model GT 9000 Microwave Synthesizer 120BA07000 REF/DC PLL PCA (A16), Rev: E Item Part Number Cage Mfr’s Part Number Description UEN0-10216 04713 MC10216PC MC10216P TRIPLE RCVR UEN0-10102 04713 MC10102P MC10102P QUAD NOR UEN0-10131 04713 MC10131L MC10131P DUAL D F/F UEN0-10131...

  • Page 183: Ba07150 Divide By N Pca (A17)

    Parts Lists 120BA07150 DIVIDE BY N PCA (A17), Rev: C Item Part Number Cage Mfr’s Part Number Description 120BS07150 58900 120BS07150 DIVIDE BY N SCH 120CF07100 58900 120CF07100 DIVIDE BY N PCB 304BF09200 58900 304BF09200 PC BD SHIELD COVER 304CF09100 58900 304CF09100 TOP PC SHEILD 1.25 X 2.5...
  • Page 184 Model GT 9000 Microwave Synthesizer 120BA07150 DIVIDE BY N PCA (A17), Rev: C Item Part Number Cage Mfr’s Part Number Description RN55-14990 91637 RN55C4991F 4.99 K OHMS 1% MET FILM RN55-13920 91637 RN55C3921F 3.92 K OHMS 1% MET FILM RN55-34750...

  • Page 185: Ba07250 Output Pll Pca (A18)

    Parts Lists 120BA07250 OUTPUT PLL PCA (A18), Rev: B Item Part Number Cage Mfr’s Part Number Description 120BS07250 58900 120BS07250 OUTPUT PLL SCH 120CF07210 58900 120CF07210 OUTPUT PLL PCB ETST-06224 58900 ETST-06224 TURRET TERMINAL CC50-00330 31433 C315C330J2G5CA C9248 33 PF CERAMIC NPO CC50-03470 31433 C320C473K5R5CA...
  • Page 186 Model GT 9000 Microwave Synthesizer 120BA07250 OUTPUT PLL PCA (A18), Rev: B Item Part Number Cage Mfr’s Part Number Description DSA0-02810 28480 5082-2800 5082-2810 SCHOT. DIODE DSA0-02810 28480 5082-2800 5082-2810 SCHOT. DIODE DSA0-04148 58900 DSA0-04148 1N4148 G.P . DIODE DSA0-04148...
  • Page 187 Parts Lists 120BA07250 OUTPUT PLL PCA (A18), Rev: B Item Part Number Cage Mfr’s Part Number Description RN55-01820 91637 RN55C1820F 182 OHMS 1% MET FILM RN55-14750 91637 RN55C4751F 4.75 K OHMS 1% MET FILM RN50-11000 91637 RNC50H1001F 1.00 K OHMS 1% MET FILM RN50-13320 91637 RN50C3321F...

  • Page 188: Ba08350 Yig Driver Pca (A19)

    Model GT 9000 Microwave Synthesizer 120BA08350 YIG DRIVER PCA (A19), Rev: D Item Part Number Cage Mfr’s Part Number Description 120BS08350 58900 120BS08350 YIG DRIVER SCH 120CF08300 58900 120CF08300 YIG DRIVER PCB ETST-06224 58900 ETST-06224 TURRET TERMINAL CC50-03100 54583 RD30HX7R103K .01 UF CERAMIC X7R...
  • Page 189 Parts Lists 120BA08350 YIG DRIVER PCA (A19), Rev: D Item Part Number Cage Mfr’s Part Number Description RN50-14990 91637 RN50C4991F 4.99 K OHMS 1% NET FILM RN55-01000 91637 RN55C1000F 100 OHMS 1% MET FILM RN57-15000 58900 RN57-15000 5.00 KOHM .1% MET FILM RAPG-12000 32997 3296Z-1-202...

  • Page 190: Gt9000 Disp Driver Pca (A20)

    Model GT 9000 Microwave Synthesizer 1202221000 GT9000 DISP DRIVER PCA (A20), Rev: E Item Part Number Cage Mfr’s Part Number Description 120BS21000 58900 120BS21000 DISPLAY DRIVER SCH;GT900 1203321000 58900 1203321000 DISPLAY DRIVER PCB, GT9000 HQH1-02200 13103 THERMALLOY 6073B TO220 HEATSINK...

  • Page 191: Ba39101 Hi Stab Osc Pca (A21)

    Parts Lists 1202221000 GT9000 DISP DRIVER PCA (A20), Rev: E Item Part Number Cage Mfr’s Part Number Description UIN0-00594 58900 UIN0-00594 NE594 8X DISP DRIVE UIN0-00594 58900 UIN0-00594 NE594 8X DISP DRIVE UIN0-00594 58900 UIN0-00594 NE594 8X DISP DRIVE UTN0-02442 01295 SN74HC244N 74HC244 8X DRIV/RECV...

  • Page 192: Ba05621 5 Digit Display Pca Nvfd (A104)

    Model GT 9000 Microwave Synthesizer 120BA05621 5 DIGIT DISPLAY PCA NVFD (A104), Rev: A Item Part Number Cage Mfr’s Part Number Description 120BF05620 58900 120BF05620 5&9 DIG DISPLAY PCB NVFD HSTS-44005 55566 3048-B-440-A-0 5/16 ROUND SWAGE SPACER HSTX-44004 58900 HSTX-44004...

  • Page 193: Ba12900 Main Tune Pca (A107)1

    Parts Lists 120BA01512 DATA ENTRY M7100 PCA (A106), Rev: D Item Part Number Cage Mfr’s Part Number Description DS 15 ILGR-01540 28480 HLMP 1540 CLEAR GREEN LED DS 16 ILGR-01540 28480 HLMP 1540 CLEAR GREEN LED DS 17 ILGR-01540 28480 HLMP 1540 CLEAR GREEN LED DS 18...

  • Page 194: Ba07900 Detector Buffer Pca (A200)

    Model GT 9000 Microwave Synthesizer 120BA07900 DETECTOR BUFFER PCA (A200), Rev: D Item Part Number Cage Mfr’s Part Number Description 120BS07900 58900 120BS07900 DETECTOR BUFFER SCH 120CF07900 58900 120CF07900 DETECTOR BUFFER PCB 120CF08500 58900 120CF08500 DETECTOR BUFFER HOUSING 120BF08600 58900...

  • Page 195: Ca11502 100Mhz Module Asy (A201); Gt9000

    Parts Lists 120BA07900 DETECTOR BUFFER PCA (A200), Rev: D Item Part Number Cage Mfr’s Part Number Description R 18 RN50-31000 91637 RN50C1003F 100 K OHMS 1% MET FILM R 19 RN50-31000 91637 RN50C1003F 100 K OHMS 1% MET FILM R 20 RN50-31000 91637 RN50C1003F...

  • Page 196: Ca04203 100 Mhz Module Pca; Gt9000

    Model GT 9000 Microwave Synthesizer 101CA04203 100 MHz MODULE PCA; GT9000, Rev: A Item Part Number Cage Mfr’s Part Number Description 101DS04203 58900 101DS04203 100 MHz MODULE SCH; GT9000 101CF04200 58900 101CF04200 100MHZ MODULE PCB ETSB-06216 58900 ETSB-06216 BIFURCATED TERMINAL...
  • Page 197 Parts Lists 101CA04203 100 MHz MODULE PCA; GT9000, Rev: A Item Part Number Cage Mfr’s Part Number Description QBNS-04275 58900 QBNS-04275 PN4275 .1A 15V .6W NPN QBNS-04275 58900 QBNS-04275 PN4275 .1A 15V .6W NPN QBNS-04275 58900 QBNS-04275 PN4275 .1A 15V .6W NPN QBNS-04275 58900 QBNS-04275...
  • Page 198 Model GT 9000 Microwave Synthesizer 6-56 Manual No. 120AM00250, Rev C, September 1998...

  • Page 199: List Of Manufacturers

    Table 6-1. Each manufacturer is listed under its CAGE number (COMMERCIAL AND GOVERNMENT ENTITY), as noted in the parts lists. In a few cases, no CAGE number has been assigned; these manufacturers are referenced by Giga-tronics codes which are shown at the end of the list.
  • Page 200 Model GT 9000 Microwave Synthesizer Cage Name Address 07115 Corning Glass Works Houghton Pk Corning NY 14830 07180 Sage Laboratories Inc East Natick Industrial Park 3 Huron Dr Natick MA 01760 07263 Fairchild Semiconductor Corp Cupertino CA 07512 Oak Materials Group Inc...
  • Page 201 Parts Lists Cage Name Address 23499 Judd Wire Inc 870 Los Vallecitos Blvd San Marcos CA 92069 23899 Van Petty Mfg Inc 1168 Tourmaline Dr Newbury Park CA 91320 23936 Pamotor 770 Airport Blvd Burlingame CA 94010 24355 Analog Devices Inc Rt 1 Industrial Park Norwood MA 02062 24539 Avantek Inc...
  • Page 202 Model GT 9000 Microwave Synthesizer Cage Name Address 52763 Stettner Electronics Inc 6135 Airways Blvd Chattanooga TN 37421 52840 Western Digital Corp 3128 Red Hill Ave Costa Mesa CA 92626 53387 Minnesota Mining & Mfg Co Electronic Products Div 3M...
  • Page 203 Parts Lists Cage Name Address 63132 Time Microwave 398 Martin Ave Santa Clara CA 95050 63345 Overland Products Co Inc 1687 Airport Rd Fremont NE 68025 63468 Electro Dynamics 5625 Foxridge Dr Shawnee Mission KS 66201 63542 Hall-Mark Electronics Corp 11333 Pagemill Rd Dallas TX 75243 64135 Filter Concepts...
  • Page 204 Model GT 9000 Microwave Synthesizer Cage Name Address 84411 American Shizuki Corp 301 W O St Ogallala NE 69153 86797 Rogan Corp 3455 Woodhead Dr Northbrook IL 60062 88245 Winchester Electronics 13536 Saticoy St Van Nuys CA 91409 89110 Amp Inc...
  • Page 205 Diagrams 7.1 Introduction Assembly drawings and circuit schematics for the Model GT 9000 Microwave Synthesizer assemblies are in this chapter. Parts lists for all assemblies are contained in Chapter 6. Manual No. 120AM00250, Rev C, September 1998...
  • Page 206 Model GT 9000 Microwave Synthesizers Manual No. 120AM00250, Rev C, September 1998...

  • Page 207: A.1 Introduction

    Options A.1 Introduction The following accessories and options are available for the Model GT 9000 Synthesized Microwave Sweeper. Each accessory and option is described under its respective heading in this appendix. Field Installable • Accessory A001: Cable Kit (SMA) •...

  • Page 208: A.2 Accessory A001: Cable Kit (Sma), P/N 29847

    A.4 Accessory A003: Rack Mount Without Slides, P/N 29862 This is a field kit for mounting the Model GT 9000 in a standard equipment rack. The kit does not include mounting slides. The kit is available from Giga-tronics with part number 29862. The components included are listed below.

  • Page 209: A.5 Accessory A006: Extender Board Service Kit, P/N 29813

    A.7 Accessory A011: Instrument Carrying Case, P/N 29855 This is a special ruggedized carrying case for transporting the instrument between work sites. It can be ordered from Giga-tronics with part number 29855. A.8 Option 16: 1 Hz Resolution If Option 16 is installed, the frequency resolution of the instrument is 1 Hz.

  • Page 210: A.9 Option 20: High Power Rf Output

    Model GT 9000 Microwave Synthesizer A.9 Option 20: High Power RF Output Option 20 provides a higher power output than is normally available. Option 20A uses PIN diodes and can operate with frequency sweep while the option is installed. Option 20B uses a mechanical relay to switch 2 GHz or less.

  • Page 211: A.9.4 High Power Indications

    Options the operation of the high power option is incompatible with low power settings. If the option has been selected, and a power level of less than +8 dBm is requested, the option will be disabled, and will not activate itself until a level setting is changed to +8 dBm or greater. During a digital power sweep across 8 dBm, the high power option is activated or deactivated (as needed) when the power level crosses 8 dBm.

  • Page 212: A.9.6 Option 20 Components

    Model GT 9000 Microwave Synthesizer A.9.6 Option 20 Components 29853 OPT 20A HIGH POWER RF OUTPUT, Rev: C Item Part Number Cage Mfr’s Part Number Description 002CI05900 58900 002CI05900 INSTRUCTIONS FOR 0042235200 58900 0042235200 .01-20 GHz POWER AMP ASY 30091...

  • Page 213: A.10 Option 22: Rear Panel Rf Output Connector

    If Option 22 is installed, the RF output connector is relocated to the rear panel of the Model GT 9000. This option can reduce RF output power by as much as 2 dB. Option 22 can be installed with or without Option 26. Option 22A is with Option 26; Option 22B is without Option 26.

  • Page 214: A.12 Option 24: Internal Modulation, Am And Fm Modes

    This option provides two built-in function generators for creating AM and FM envelopes (the built-in pulse generator for pulse modulation is standard equipment in Model GT 9000). This option has been incorporated into the main body of the manual; where a procedure or specification applies only to instruments with Option 24, a note to that effect is included.
  • Page 215 Options 120BA12601 FUNCTION GENERATOR PCA (A6A1), Rev: C Item Part Number Cage Mfr’s Part Number Description CC50-03100 54583 RD30HX7R103K .01 UF CERAMIC X7R CC50-01470 31433 C315C471K1G5CA 470 PF CERAMIC NPO CC50-03470 31433 C320C473K5R5CA .047 UF CERAMIC X7R CC50-01470 31433 C315C471K1G5CA 470 PF CERAMIC NPO CC50-03100 54583...

  • Page 216: A.13 Option 25: Planar Crown Rf Output Connector

    Model GT 9000 Microwave Synthesizer A.13 Option 25: Planar Crown RF Output Connector If Option 25 is installed, the RF output connector is replaced by a Planar Crown Universal Connector, manufactured by Lucas Weinschel. This is a two-part connector; the components are referred to as the planar bulkhead and the planar crown.

  • Page 217: A.14 Option 26: 10 Db Step Attenuator

    Options A.14 Option 26: 10 dB Step Attenuator Under this option, an attenuator is placed in the RF output path of the instrument, which provides up to 110 dB of attenuation in 10 dB increments. This option has been incorporated into the main body of the manual. Where a procedure or specification applies only to instruments with Option 26, a note to that effect is included.

  • Page 218: A.15 Option 27: Scan Modulation/Linear Am

    Model GT 9000 Microwave Synthesizer A.15 Option 27: Scan Modulation/Linear AM In instruments with Option 27, a scan modulator (an FET-based variable attenuator) is placed in the RF path, between the level control system and the output step attenuator. This modulator is digitally controlled and linearized, and can operate in Scan mode (DC coupled, with depth specified in dB) or Linear AM mode (AC coupled, with depth specified in per cent).

  • Page 219: A.15.1 Option 27 Front Panel Operation

    Options A.15.1 Option 27 Front Panel Operation Figure A-2. Scan/AM Modes To select any of the modulation modes provided under Option 27, press [AM] (see Figure A-2). The entry menu display should read SCAN EXT: OFF. This indicates that Scan mode is selected but is presently turned off;...

  • Page 220: A.15.2 Option 27 Theory Of Operation

    Model GT 9000 Microwave Synthesizer A.15.2 Option 27 Theory of Operation Figure A-3. Scan Modulation The modulating waveform can be applied from an external source, or (if Option 24 is installed) generated internally. Internal modulating signals are transmitted through a shaping circuit which adapts them to the input requirements of the scan circuit.

  • Page 221: A.15.3 Option 27 Acceptance Test Procedure (Scan Mode)

    Apply a 0 to 1 V (10 dB depth) sine wave to the AM input BNC. Select SCAN EXT: ON. Connect a detector to the Model GT 9000 RF output, and connect the output of the detector to the oscilloscope (channel B, 50 Ω on). Set the oscilloscope to 2 mV, 200 µsec, and adjust the channel B input vernier for a display of the waveform that...

  • Page 222: A.15.4 Option 27 Acceptance Test Procedure (Linear Am Mode)

    With an ohmmeter, measure the resistance of the AM input BNC to ground; it should read 50 Ω, ±3 Ω. Connect the GT 9000 RF output to a mixer box, as shown in Figure A-2. On the HP 8902A, select 50 Hz and 15 kHz filters, AM mode. Set the GT 9000 RF output frequency to 5 GHz.

  • Page 223: A.15.5 Option 27 Linear Am Calibration

    Adjust the Level pot (R25) for a DVM reading of +0.65 Vdc on TP1. Connect the Model GT 9000 and test equipment as shown in Figure A-2. On the HP 8902, select 50 Hz and 15 kHz filers, AM mode. Set the GT 9000 RF output to 5 GHz.

  • Page 224: A.15.6 Option 27 Scan Calibration

    Set the UUT to 1 GHz, 0.0 dBm. Select VAR ATTN: ON. Using a Giga-tronics 8540 power meter (or equivalent), measure the RF output power of the UUT (see the 8540 frequency value equal to the frequency being measured). Verify a reading of 0.0 dBm ±2 dB.
  • Page 225 Options 29866 OPT 27 60 dB SCAN WITH OPT 26, Rev: A Item Part Number Cage Mfr’s Part Number Description 004BA34300 58900 004BA34300 .01-20 GHZ SCAN 420CF41700 58900 420CF41700 CTR/SCAN MOUNT; GT9000/S MRTL-22020 58900 MRTL-22020 COAX TRANS SWITCH 003AW02700 58900 003AW02700 OPT 27;...
  • Page 226 Model GT 9000 Microwave Synthesizer 120BA15650 SCAN MODULATION PCA (A7); GT9000, Rev: C Item Part Number Cage Mfr’s Part Number Description CC50-04220 31433 C322C224M5U5CA .22 UF CERAMIC Z5U CC50-05100 04222 SR305E105MAA 1 UF CERAMIC Z5U CC50-00470 31433 C315C470J2G5CA 47 PF CERAMIC NPO...
  • Page 227 Options 120BA15650 SCAN MODULATION PCA (A7); GT9000, Rev: C Item Part Number Cage Mfr’s Part Number Description RAPG-12000 32997 3296Z-1-202 2K 10% 25T .5W POT. RN50-11000 91637 RNC50H1001F 1.00 K OHMS 1% MET FILM WJIB-02022 58900 WJIB-02022 .2 INSULATED JUMPER RN55-00511 91637 RN55C51R1F...
  • Page 228 Model GT 9000 Microwave Synthesizer A.16 Option 28: High Stability Timebase When Option 28 is installed, a special timebase oscillator having an aging rate of 5 × 10 /day is substituted for the standard timebase oscillator. The components required for Option 28 are listed in below.

  • Page 229: A.17 Option 30: Switching Power Supply

    Options A.17 Option 30: Switching Power Supply This is a factory-installed option to provide a CE-approveed Switching Power Supply. This option is not field-installable. The components required for Option 30 are listed below. 30796 OPT 30 SWITCHING PWR SUP, Rev: B Item Part Number Cage...
  • Page 230 Model GT 9000 Microwave Synthesizer 30712 OPT 30 SW PWR SPLY PCA, Rev: B Item Part Number Cage Mfr’s Part Number Description 30713 58900 30713 SWITCHING PWR SUPPLY SCHEM 30711 58900 30711 SWITCHING PWR SUPPLY PCB 30714 58900 30714 SWITCHING PWR SUPPLY TP...
  • Page 231 Options 30717 OPT 30 SW PWR SPLY PCA, Rev C Item Part Number Cage Mfr’s Part Number Description 30718 58900 30718 SWITCHING PWR SUPPLY SCH 30711 58900 30711 SWITCHING PWR SUPPLY PCB 30719 58900 30719 SWITCHING PWR SUPPLY TP CC00-B1470 58900 CC00-B1470 470PF Z5F CERAMIC DISC...
  • Page 232 Model GT 9000 Microwave Synthesizer A-26 Manual No. 120AM00250, Rev C, September 1998...
  • Page 233 Index Output PLL PC A18 3-32 Power supply PC A11 3-25 1 Hz PLL PC A15 3-27 Pulse driver PC A5 3-20 100 MHz Oscillator 3-35 Pulse generator PC A5A1 3-21 100 MHz Oscillator/sampler driver PC A201 3-35 Pushbutton PC A105 3-33 100 MHz Oscillator 3-35...
  • Page 234 Model GT 9000 Microwave Synthesizer Recall/store Front panel interface, PC A1 3-18 Up/down keys Function generator PC A6A1 3-22 Data entry PC A106 3-34 Delay test setup Detector buffer PC A200 3-34 Diagrams General circuit theory Digi-dial knob General failure...
  • Page 235 2-26 Interface 2-18 Commands 2-27 Interface hardware configuration 2-18 Front Panel Description Internal modulation generator tests 4-27 GT 9000 Syntax 2-20 Internal pulse generator tests 4-24 IEEE-488 Interface 2-18 Internally generated AM envelope 1-10 Line power and fuse 2-18 Internally generated PM delay...
  • Page 236 Model GT 9000 Microwave Synthesizer Spurious signals tests 4-14 Phase lock loop, 100 MHz Safety Precautions Phase Lock Loops Voltage and fuse selection PM envelop parameters Sampler drive 3-35 PM sync out setup Sampler drivers, 100 MHz VCO PM video out setup...
  • Page 237 Index 10 MHz master reference 5-14 Loss of RF output 100 MHz module 5-13 Output frequency unlocked Output locked but frequency incorrect 100 MHz PLL 5-14 Detector 5-10 Troubleshooting Notes Divide-by-N 5-12 Downconverter PLL 5-14 IEEE-488 interface/timer circuit 5-14 Up/down keys Level control circuit 5-11 Microwave module...
  • Page 238 Model GT 9000 Microwave Synthesizer Index-6 Manual No. 120AM00250, Rev C, September 1998...

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