SECTION 1 TECHNICAL SPECIFICATION ............................ 1-1 SECTION 2 GENERAL DESCRIPTION ................................ 2-1 1 Introduction ...................................... 2-1 2 Measurement Functions ............................ 2-1 2 Frequency A Function ........................ 2-1 3 Frequency B Function ........................ 2-1 4 Period A Function ............................ 2-1 5 Ratio A/D Function............................2-1 6 Ratio B/A Function 1998 Only) ... ............. 2-1 7 Check Function ................................... 2-2 8 Signal Input Channels ............................ 2-2 11 Error Indication ................................ 2-2 12 External Arming...................................2-2 13 Display ...................................2-2 14 Hold Feature ...................................2-3 15 Resolution and Gate Time ........................2-3 16 External Gate Output ............................2-3 18 External Frequency Standard Input ................. 2-3 19 Standby Mode ...................................2-3 20 Null Function ...................................2-3 21 Initialization ..................................2-4 22 Options Available ................................ 2-4 22 Frequency Standard (04X Options) ............. 2-4 23 Reference Frequency Multiplier (Option 10) ..... 2-4 24 GPIB Interface (Option 55)....................2-4 25 Battery Pack (Option 07) ....................2-5 29 Rack Mounting Kits............................2-5 SECTION 3 PREPARATION FOR USE................................3-1 1 Unpacking ......................................3-1 3‘ Pov/er Supply ..................................3-1 3 AC Line Voltage Setting ....................3-1 5 Line Fuse ...................................3-1 6 Power Cord...................................3-2 9 Functional Check ................................ 3-2 11 Frequency Standard 3-3 13 External Arming................................... 3-3 14 Gate Output ................................3-3 15 Preparation For Use With the GPIB .................3-3 15 Introduction ................................3-3 16 Connection to the GPIB........................3-3 17 Address Setting and Display ................. 3-4 19 GPIB Check ......................................3-6 22 Remote and Local Message Check ................. 3-6 26 Local Lockout and Clear Lockout Check ......... 3-7 29 Data Output Check ............................ 3-8 30 SRQ and Status Byte Check ....................3-8 32 Device Clear and Selected Device Clear Check ... 3-9 34 IFC Check .........................................3-10 35 TALK ONLY Selector Check ........................3-10 36 Option Fitting Instructions ............................ 3-10 36 Single-Instrument Fixed Rack Mounting Kit 11-1648 3-10 38 Double-Instrument Fixed Rack Mounting Kit 11-1649 3-11 41 PCB-Mounted Frequency Standard 11-1713 ........... 3-12 44 Ovened Frequency Standard 11-1710 and 11-1711 ... 3-13 47 Reference Frequency Multiplier Option 11-1645 ... 3-14 49 GPIB Option 11-1724 ........................... 3-15 51 Battery Pack Option 11-1625 ................... 3-16 SECTION 4 OPERATING INSTRUCTIONS ............................ 4-1 1 Introduction ................................... 4-1 2 Description of Controls, Indicators and Connectors ... 4-1 2 Front Panel Items .............................4-1 3 Rear Panel Items ............................4-6 4 Frequency Measurement - Input A .....................4-9 5 Frequency Measurement - Input B .....................4-10 6 Period Measurement .................................4-11 7 Ratio Measurement B/A 1998 Only) ..................4-13 8 Ratio Measurement A/D .............................4-15 9 Signal Burst (Single Shot) Measurement ..............4-17 10 Null Facility ...................................4-18 14 External Arming..................................4-18 19 Display Resolution .................................4-19 22 Gate Time .......................................4-20 23 Gate Output Signal ...............................4-20 27 Error Codes.......................................4-22 28 Clearing the Error Codes ....................4-22 29 Using the Battery Pack Option .................... 4-22 29 Power Supply Changeover .....................4-22 30 Battery-Low Indication ........................ 4-23 32 Operating Instructions ........................ 4-23 36 Battery Charging ............................4-24 SECTION 5 OPERATION VIA THE GPIB ............................5-1 1 Introduction ....................................5-1 2 GPIB Operating Modes ............................5-1 3 Talk Only Mode ...................................5-1 8 Addressed Mode ....................................5-2 9 Data Output Format .................................5-2 10 Deferred Commands and Immediate Comamnds ..........5-2 11 Service Request ....................................5-4 13 Status Byte.......................................5-4 14 Explanation of Response to Interface Messages ......5-6 16 Address Messages .............................5-6 20 Local Lockout ................................5-6 22 Device Clear and Selected Device Clear ..........5-6 24 Serial Poll Enable and Serial Poll Disable.....5-8 27 Group Execute Trigger ........................5-8 28 Go to Local ................................5-8 29 Untalk and Unlisten ........................5-8 30 Input Command Codes .................................5-8