Frequency Modulation Operating Modes ....3-74
Providing Frequency Modulation ........3-75
Square Wave Modulation Operating Modes . . . 3-77
Providing Square Wave Modulation.......3-77
3-13 SYSTEM CONFIGURATION ............3-80
Configuring the Front Panel ..........3-81
Configuring the Rear Panel...........3-82
Configuring the RF ...............3-83
Configuring the GPIB .............3-85
Setting Increment Sizes ............3-88
3-14 SAVING/RECALLINGINSTRUMENT SETUPS . 3-89
Saving Setups .................3-89
Recalling Setups ................3-89
Erasing Stored Setups .............3-90
3-15 SECURE OPERATION ...............3-91
3-16 REFERENCE OSCILLATOR CALIBRATION . . . 3-92
Chapter 4 Local Operation–Menu Maps
4-1 INTRODUCTION ...................4-3
4-2 MENU MAP DESCRIPTION .............4-3
Chapter 5 Operation Verification
5-1 INTRODUCTION ...................5-3
5-2 TEST EQUIPMENT..................5-3
5-3 TEST RECORDS ...................5-3
5-4 INITIAL 681XXC CHECKOUT............5-4
Power Up ....................5-4
Self Test.....................5-4
Resetting the 681XXC ..............5-4
Warmup Time ..................5-4
5-5 CW FREQUENCY ACCURACY TEST........5-5
Test Setup ....................5-5
Test Procedure..................5-6
5-6 POWER LEVEL ACCURACY AND FLATNESS
TESTS ........................5-13
Test Setup ...................5-13
681XXC OM iii
Table of Contents (Continued)