Sensitivity - TB-9-6625-2331-350005

TB-9-6625-2331-35 Electronic Counter John Fluke Model PM6681/656 Manual
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TB 9-6625-2331-35

(4) Allow at least 24 hours for stabilization.

Frequency difference meter

indication will remain within 5 parts in 10-10.

(5) Adjust autotransformer output to 105 V and allow 15 minutes for

stabilization. Verify that TI oscillator drift is less than 5 parts in 10-10.

(6) Adjust autotransformer output to 125 V and allow 15 minutes for

stabilization. Verify that TI oscillator drift is less than 5 parts in 10-10 .

(7) Adjust autotransformer output to 115 V.

b. Adjustments. No further adjustments can be made.

9. Sensitivity

a. Performance Check

(1) Set signal generator for a 1 MHz -21 dBm output with RF output off.

(2) Press TI keys as listed in (a) and (b) below:

(a) LOCAL/PRESET.

(b) INPUT A and INPUT B 50Ω /1MΩ to select 50Ω .