Racal Instruments 2251A Operator's Manual page 47

SF Number
Arming
10 Internal
11 External+ve
12 External-ve
15 External+ve
16 External+ve
17 External-ve
18 External-ve
20 Normal Operation
21 Inputs A and B interchanged. Permits PERIOD B and TI B to
A measurements, for example. See NOTE following.
30 Continuous Auto-trigger measurement
31 Single-shot auto-trigger measurement
50 Selects Mean Amplitude Measurement Mode
51 Selects Positive Peak Amplitude Mode
52 Selects Negative Peak Amplitude Mode
60 Totalize A by B (When in TA)
61 Manual Totalize (When in TA)
70 Basic 10 MHz Check
72 Start TEC short continuous calibration; display shows TEC count (Must
enable CK mode)
73 Start TEC long continuous calibration; display shows TEC count (Must
enable CK mode)
74 Stop TEC short calibration (Must enable CK mode)
75 Stop TEC long calibration (Must enable CK mode)
76 Input A and B DAC Check (Must enable CK mode)
3-18
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Table 3.14 - Special Function Codes
Function
Start
Internal
Internal
Internal
External+ve
External-ve
External+ve
External+ve
Stop