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