Fl Channel Config, Pin Frequency Hz | Agilent Technologies 2712A

Service

Model 8904A

4b. Digital-to-Analog Converter Check (Using a Counter)

a.If the counter has an external 10 MHz timebase reference input, connect it to the rear-panel 10 MHz REF OUT of the Multifunction Synthesizer.

NOTE

If the counter does not have an external reference, the readings in the following steps may be off several counts. This does not indicate a failure.

b.On the Multifunction Synthesizer, press SHIFT PRESET. After the instrument presets, key in

For A3 Output Assembly For A10 Output Assembly

fl (Channel Config.)	fl (Channel Config.)
NEXT	NEXT NEXT
WAVE FORM /t	WAVE FORM /L
FREQ 25.6 Hz	FREQ 25.6 Hz
AMPTD 10V	AMPTD 10 V

NOTE

Setting the frequency to exactly 25.6 Hz inputs a TTL squarewave to each input of the DAC latches. As the DAC’s data input lines are probed from the most significant bit the the least significant bit, the frequency is consecutively divided by two.

c.Connect the high-impedance input of the counter to the pin of the IC listed below. The counter should read within one count of the frequency indicated in the table.

IC on A3 or A10	Pin	Frequency (Hz)
u5	14	52 428.8
u5	13	26 214.4
u5	1 1	13 107.2
u5	6	6	553.6
u5	4	3	276.8
u5	3	1	638.4
u4	14	819.2
u4	13	409.6
u4	11	204.8
u4	6	102.4
u4	4		51.2
u4	3		25.6

8-34Troubleshooting (Digital/Output Interface)

Image 102

Agilent Technologies 2712A, 2948 manual Fl Channel Config, Pin Frequency Hz

Contents

Agilent Technologies Innovating the HPWay Multifunction Synthesizer Copyright@ HEWLETT-PACKARD Company Regulatory Information Safety Considerations Safety Considerationsfor this Instrument Product Markings Contents Service cont’d Section Reu.200CT88 Replaceable Parts List Introductionto this SectionReference Designationsand Abbreviations Used in this Manual Replaceable Parts List Updating Manual Updates How to Order Abbreviations 1 AccessNable 6-1.Reference Designations ALC Abbreviations 2 Description Replaceable PartsRev.01JUL91 Number Code Fible 6-3.Replaceable Parts HPPart Description Number Mfr- Mfr. Part Number CodeCAPACITOR-FXD22PF +-5% Poovdc CER 0+-30 Not Assigned Reference HP Part Description Designation Number Reference HP Part Description Designation Number Mfr Me 6-3. Replaceable Parts Rev.1 7MAY88Reference HP Part Designation Number CONNECTOR-RFSMC M PC 5 W H M DIODE-SWITCHING 80V 200MA 2NS DO45Not Assigned Connector Spin M Post Type CONNECTOR-RF SMC M PC W H M Reference Mfr RESISTOR-TRMR 1K 10% C TOP-ADJ 17-TRN Cable 6-3.Replaceable PartsHP Part Description RESISTOR-TRMR20K 10% C TOP-ADJ 17-TRN Mfr. Part Number 0698-3430 Rev.17MAY88 Description Mfr IC Instm Ampl CUR 10-DIP-P PKG Transistor Array 16-PIN Plstc DIPIC OP AMP Prcn 8-DIP-C PKG IC OP AMP LOW-BIAS-H-IMPD 8-DIP4 PKG Nble 6-3. Replaceable Parts HPPart Description A10 L e 6-3. Replaceable Parts Miscellaneous Parts Ble 6-3.Replaceable PartsHPPart Reference HPPart Description Mfr Designation Number Code RIVET-BUND PL-STEM DOME-HD .125DIA Deck AssyRnftsund Plstem DOME-HD .125DIA RIVET-BUND Plstem Domehd .125DIA Keypad Punched PANEL, Front AYNot Separaretlyreplaceable Shield Display Reference HPPart Designation Number QW. Description Qty.Description Designation Code Lbble 6-3. Replaceable Parts Mfrm Mfr. Part Number CodeOrder by Description IZZ-9 Main Deck Assembly Top, 2923A and above Model 8904A Main Deck Assembly Bottom Main Deck Assembly Bottom, Option 006 2948A and above Reu.30NOV89 Front Panel Assembly, 2923A and above Rent Panel Assembly, Option 006 2948A and above Reu.30NOV89 Rear Panel Assembly Rear Panel Assembly, Option 005 2948A and above Rev.30N0 Covers, Labels, and ROMs Rev.ZSSEP88 Output Cables 1 Output Cables, Option 005 29484 and above 2 Rev.30N0V89 Table of Contents Option Conversions Rev.15DEC89Number 2942A and below Instrument Modifications Titled Hardware ModificationsRevision 22987A with HP 08904-8701 0 as A2U12 Parts Required Modification ProcedureFRONT-TO-REAR-PANELOUTPUT Conversion Description Tools Required Fl Channel Config Operation Verification REAR-TO-FRONT-PANELOUTPUT Conversion DescriptionRev.15DEC89 Rear-to-Front-Panel Output Conversion Fl Channel Config Ront Panel Output Hardware Output Cable Routing ALL Options Firmware Updates A2U12 and A2U13 Rev.01JUL91 Firmware UpdatesBardware ModificationsDifferent function Modification for Possible Ground Wire Shock Hazard Serial Prefix 2737A and below Parts Location Shown with Power Supply Removed Firmware Updates/Hardware Modifications Ground Wire Wrapping Firmware Updates/Hardware Modifications HPPartNumber ~~ Qty Description Parts ListModification for Output Overvoltage Protection Improvement Fixed Resistor, 261 or Modification for Potential Power Supply Short Cabinet Parts Color Change 1. Modificationfor Front Panel Assembly Reu.15DEC89 Firmware UpdatesIHardwareModifications Removing the Front Panel Installingthe Front Panel Dont-Panel Assembly, 2923A and above A3 or A10 Output Assembly Phase Synchronization Option Section Service Safety Considerations Before Applying PowerHOW the Section is Organized Iwarning Service TOOLS, HELPS, and Information Schematic Symbology and Schematic Diagram Notes Schematic Diagram Notes 1 Pin of socket Schematic Diagram Notes 2 Schematic Diagram Notes 3 Llzble 8-1.Schematic Diagram Notes 4 Digital Symbology Reference Information Schematic Diagram Notes 5 Combinational Logic Symbols and Functions Digital Symbology Reference Information Schematic Diagram Notes 6 Schematic Diagram Notes 7 Only with D-type flip-flops Gate and Dependency-Binary Llable 8-1.Schematic Diagram Notes 8of Miscellaneous Service Schematic Diagram Notes 9 Schematic Diagram Notes 10 Active Levels Schematic Diagram Notes 11 Enable Principles of Operation Overall What the Multifunction Synthesizer Can DoHow Waveforms Are Generated Channel a Generating Staircases in the Phase Accumulator Output of the Phase Adder for P=O, 1, Further Digital Waveform Processing with Options Phase @PHASE Freouency PulseFreouency SUM Pulse Level Analog Waveform Processing Interrelationshipof the Circuit AssembliesReu.15DEC89 Principles of Operation Overall Synthesizer PASSY- t A2 Digital Assembly General A3 Output Assembly Service Sheets 1 through General Digital-to-Analog Converter Service SheetTrack-and-Hold Circuit Service Sheet Simplified Diagram of the Sampler Drive 10.Simplified Diagram of the Sampler Amplifier Sine X/X CompensationService Sheet Low-Pass Filters Service SheetAudio Amplifier Service Sheet 12, and 24 dB Attenuators Service Sheet Floating Amplifier Driver and On/Off Switch Service Sheet Floating Output Amplifier Service SheetOvervoltage Protectionand Output Circuits Service Sheet Troubleshooting General Rev.15DEC89 Troubleshooting General A2 Digital Assembly to A3 or A10 Output Assembly Interface ProcedureEquipment 1. How to Access A3 in Instruments Equipped with Option Troubleshooting Digital/Output Interface Serial Prefix Fl Channel Config Period Fl Channel Config Pin Frequency Hz Function A3 Key Sequence A10 Key Sequence A3/A10 ConnectionIC Pin Level F3 Memory Map Access J1 and J5 Clocks A10Pin Miscellaneous Control A2 Digital Assembly to A1 Keyboard Assembly Interface Fl Keyboard Check AMPTD, Wave Form Pin Key Pressed Response lTL F3 Memory Map Access Key Sequence Annunciator Status IC on A2 Pin Level lTL A2 Digital Assembly to A5 Display Assembly Interface Description A3 or A10 Output Assembly Phase Synchronizationoption Troubleshooting Phase Synchronization HP 8904A Opts After keying in 8 7, the display should be IFirmware Revision 18387A Serial No IFirmware Revision 18387A Serial No HP 8904A Opts 02/01 After keying in 4 8, the display should be Begin again at step Tools and Supplies HOW to Replace the Memory Backup BatteryTroubleshooting Memory Backup Battery 48.1 Parts Troubleshooting Memory Backup Battery Rev.15DEC89 Troubleshooting Memory Backup Battery 48.3Page N a 12.4. Line Voltage Wiring Harness A3 Component Coordinates 1 R300 Ipower Supply Conditioners L0nA Current Source A3 Component Coordinates 2 Comp On the A3 schematic Ss2Rev.28MAR89 I813IldIll3 JJOlfl3 dWHS 31901 N3AILlO ONV 15.Service Sheet Information Component Locator Changes Rev.28MAR89 54.1 Coup OUT Aooitions I T I a L Instrument SettingsAmpto Instrument Settings Measure K2A + a Component Coordinates 1 Ss4 56.1 Ss4 A6 Schematic and Component locator Ss5 Output Assembly 0 A3/A10