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Calibration
Steps
Each of the steps in this procedure provides initial
calibration of a specific 682XXB/683XXB circuit or
component. To ensure accurate instrument calibra
-
tion, each step of this procedure must be performed
in sequence.
1. Calibrate the internal DVM circuitry as follows:
a.
At the
$ prompt, type: calterm 119 and
press <ENTER>. (The
$ prompt will appear on
the screen when the calibration is complete.)
b. Record step completion on the Test Record.
2. Calibrate the Coarse Loop Pretune DAC as fol
-
lows:
a.
At the
$ prompt, type: calterm 137 and
press <ENTER>. (The
$ prompt will appear on
the screen when the calibration is complete.)
b. Record step completion on the Test Record.
3. Calibrate the Fine Loop Pretune DAC as follows:
a.
At the
$ prompt, type: calterm 136 and
press <ENTER>. (The
$ prompt will appear on
the screen when the calibration is complete.)
b. Record step completion on the Test Record.
4. Calibrate the Sweep Time DAC as follows:
a.
At the
$ prompt, type: calterm 132 and
press <ENTER>. (The
$ prompt will appear on
the screen when the calibration is complete.)
b. Record step completion on the Test Record.
5. Calibrate the YIG Frequency Offset DAC as fol
-
lows:
a.
At the
$ prompt, type: calterm 134 and
press <ENTER>.
b. Follow the instructions on the screen.
NOTE
Adjust the DAC to the number that will get
the closest to the 1.9 GHz and 8.3 GHz
called for by the procedure.
c. Record step completion on the Test Record.
4-14 682XXB/683XXB MM
PRELIMINARY
CALIBRATION CALIBRATION
NOTE
To save the calibration data after
completing any calibration step,
type:
calterm 787 and press
<ENTER>.