Figure 1. Top View.

Calibration Procedure For Electronic Counter, Model Pm6681/656 Page Navigation
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TB 9-6625-2331-24

Front

Figure 1. Top View.

(9) 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.

(10)Adjust autotransformer output to 115 V.

b. Adjustments. No further adjustments can be made.

9. Sensitivity

a. Performance Check

(1) Press TI LOCAL/PRESET key.

(2) Press both INPUT A 50Ω/1MΩ and INPUT B 50Ω/1MΩ key to select 50Ω.

(3) Connect signal generator RF output to TI INPUT A.

(4) Set signal generator to settings in first row of table 3 with RF output off.

(5) Set the signal generator RF output to on. If TI does not indicate a stable display

of the applied frequency as listed in table 3, perform b below.

(6) Repeat steps (4) and (5) above for remaining settings listed in table 3.