HP 8340B Manual page 205

5-15. ALC ADJUSTMENTS (Cont'd)
32. Adjust the power supply for +0.3 Vdc. The
2.38dB. If the indication is not in this range, adjust A26R91 (AM GAIN, Figure 5-51) for a power
meter indication
33. Adjust the power supply for —0.3 Vdc. The power meter indication should be between —2.91 and
—3.29 dB. If the indication is not in this range, adjust A26R91
indication within the given range.
34. Repeat steps 32 and 33 until the power level requirements are met for each step.
If adlustments of the calibration constants were made in this procedure,
the data thus stored in the "working memory area" should be copied to
the "protected memory area" by pressing the following key sequence:
[SHIFT][MHz] [1] [4] [Hz] [SHIFT][kHz] [5] [3] [4] [9] [Hz]. Wait for
"CALIBRATION RESTORED" to be displayed in the ENTRY DISPLAY and
then press [INSTRPRESET].
HP 8340B/41B
within the given range.
R91
Figure 5-51. A26 Linear Modulator Component Location Diagram
power meter indication should be between 2.18 to
£26
(AM
NOTE
GAIN) for a power meter
Adjustments 5-99/5-100