TB 9-4920-456-24
(a) EXAMPLE A. If value of step (13) above is (-0.42 divided by 2) = -0.21
(subtract from value recorded in step (14) above). If value of (14) above is:
-5.31
- -0.21
Return loss is:
-5.1 dB
(b) EXAMPLE B. If value of (13) above is (+0.42 divided by 2) = 0.21 (invert
sign and add to value recorded in step (14) above).
If value of (14) above is:
-5.31
+ -0.21
Return loss is
-5.52 dB
(16) Repeat technique of (1) through (15) above three times and average value.
Return loss value for mismatch unit (4049398) will be between -5.105 and -5.435 dB.
(17) On measuring receiver deselect RATIO function.
(18) Repeat technique of (1) through (15) for termination (4049397). Return loss will
be -26.45 dB or greater (more negative).
b. Adjustments. No adjustments can be made.
a. De-energize and disconnect all equipment.
b. Annotate and affix DA label/form in accordance with TB 750-25.