Racal Instruments 2251A Operator's Manual page 56

Table 3.20 - Alphabetical List of 2251A Command Codes (continued)
CODE
BDC Selects Input B DC coupling
BHI Sets Input B input impedance to 1 Megohm
BLI Sets Input B input impedance to 50 ohms
BMN Selects Input B manual trigger mode
BNS Sets Input B trigger to negative slope
BPS Sets Input B trigger to positive slope
*CLS Clear Status Registers command
CK Selects CHECK mode
D0 Enable Gate out signal on backplane connector P2 A 23 (TTLTRG0)
D1 Enable Gate out signal on backplane connector P2 C 23 (TTLTRG1)
D2 Enable Gate out signal on backplane connector P2 A 24 (TTLTRG2)
D3 Enable Gate out signal on backplane connector P2 C 24(TTLTRG3)
D4 Enable Gate out signal on backplane connector P2 A 26 (TTLTRG4)
D5 Enable Gate out signal on backplane connector P2 C 26 (TTLTRG5)
D6 Enable Gate out signal on backplane connector P2 A 27 (TTLTRG6)
D7 Enable Gate out signal on backplane connector P2 C 27 (TTLTRG7)
D8 Disable Gate output (Default)
DD Disables Time Interval Delay
DE Enables Time Interval Delay
*ESE? Query the Standard Event Status Enable Register, response 0 -255
*ESE <Nrf> Set the mask of the Event Status Enable Register 0 - 255
*ESR? Query the Standard Event Status Register, response 0 - 255
FA Selects Frequency A measurement mode
FB Selects Frequency B measurement mode
FC Selects Frequency C measurement mode
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