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Reference Level Accuracy - Continued
Reference Level Accuracy - Continued

Calibration Procedure For Spectrum Analyzer Model 8558B Page Navigation
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TB 9-6625-2235-24
(11) Set variable attenuator 10 dB step control to 0.
(12) Repeat (9) through (11) above until no further adjustment is required.
(13) Set variable attenuator 10 dB step control to 30 dB and adjust A14R23 (fig. 13)
for a multimeter indication of 500 mV, 1 mV (plus offset voltage recorded in (7) above) (R).
(14) Set variable attenuator 10 dB step control to 0 dB and adjust A14R69 (fig. 13)
for a multimeter indication of 800 mV l mV, (plus offset voltage recorded in (7) above) (R).
(15) Repeat (13) and (14) above until no further adjustment is required.
Figure 13. A14 log amplifier assembly adjustment locations for SN prefix 2436A.
(16) Set variable attenuator 10 dB step control to 10 dB and adjust A14R23 (fig. 13)
for a multimeter indication of 700 mV, l mV (plus offset voltage recorded in (7) above) (R).
(17) Set variable attenuator 10 dB step control to 0 dB and adjust A14R39 (fig. 13)
for a multimeter indication of 800 mV, l mV (plus offset voltage recorded in (7) above) (R).
(18) Repeat (16) and (17) above until no further adjustment is required.
(19) Set variable attenuator 10 dB step control to settings as listed in table 9. If
multimeter does not indicate within specified limits, repeat (9) through (18) above.
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