TB 9-6625-2271-50
b. Adjustments
NOTE
The adjustments provided are for the notch filter. These
adjustments will not affect distortion accuracy; however,
capability will be enhanced by lowering residual distortion.
Perform the following only if TI indications are high.
(1) Connect TI OUTPUT HIGH to INPUT HIGH and OUTPUT LOW to INPUT
LOW.
(2) Press keys and enter values using DATA ENTRY keys as listed in (a) through
(d) below:
(a)
LCL INIT.
(b)
SOURCE LEVEL.
(c)
3 V.
(d)
ANALYZER DIST.
(3) Adjust A2R57 and A2R58 (fig. 4) for minimum distortion indication on TI.
A2 NOTCH BOARD
TOP VIEW
R58
R57
13. Output Frequency Accuracy
a. Performance Check
(1) Connect TI OUTPUT HIGH to frequency counter CHANNEL A input.
(2) Press keys and enter values using DATA ENTRY keys as listed in (a) through
(e) below:
(a) LCL INIT.
(b) SOURCE LEVEL.
(c) 1 V.
(d) SOURCE FREQ.
(e) 21.111 Hz.
