5700A/5720A Series II
Operators Manual
5-24
Table 5-2. Commands (continued)
CAL_TEMP
Description Sequential command, ignored if not in remote.
Sets the temperature for calibration. This should be done before sending CAL_REF,
CAL_WBFLAT, CAL_WBGAIN, or CAL_CHK commands. Once set, the temperature is
used for all calibration activities until it is changed. If the temperature is not set before a
calibration activity, the calibrator uses a default of 23.0°C.
Parameter Temperature in degrees C.
CAL_TEMP?
Description Sequential command.
Returns the previous ambient temperature setting used for a particular calibration
procedure.
Parameter B5725, CAL, WBFLAT, WBGAIN, or CHECK
Response (Float) Temperature in degrees C.
CAL_WBFLAT
Description Overlapped command, ignored if not in remote.
Does Wideband AC Module (Option 5700-03) flatness calibration. There are two different
calibration procedures for the wideband module; gain and flatness. Wideband gain is to be
done at every calibration cycle. Wideband flatness is needed only during full verification,
recommended every two years. For reference, the manual procedure for wideband flatness
cal is in Chapter 3 of the 5700A/5720A Series II Service Manual.
After sending a CAL_WBFLAT START command, the controller must adjust the calibrator’s
output using the INCR command until it matches the calibration voltage, then inform the
calibrator of the fact by sending a CAL_WBFLAT NULL command. A series of points to test
is selected automatically by the software. After each CAL_WBFLAT NULL command, you
can determine the calibration setting by sending an OUT? command.
Parameter
START (Starts flatness calibration, sources the first point)
NULL (Calculates flatness constant, sources the next point)
STORE (Stores wideband flatness constants into EEPROM)
Example:
CAL_TEMP 24.6
CAL_WBFLAT START
(Connect to external standard as in the Service Manual)
OPER
INCR (Enough to get the calibrator’s output correct)
CAL_WBFLAT NULL
(Repeat the preceding two commands for each calibration point. CAL_NULL
automatically sources the next calibration point. When OUT? returns 0,V,0, all points
have been calibrated.)
CAL_WBFLAT STORE
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