Figure 4-10. Relative envelope delay vs frequency limits.

TM 11-5895-1012-10

16 2 0

2 8 32 3 6

4 0 4 4 4 8 52 56

60 64

68 72

FREQUENCY (KHz)

NOTES:

1. ABOVE CURVE REPRESENTS ENVELOPE DELAY REQUIREMENTS. LIMITS ARE NOT

SPEClFlED BELOW 6 KHz.

2. IF THE ENTIRE CIRCUIT CONSISTS OF PROPERLY AMPLITUDE EQUALIZED TWISTED

PAIR CABLE, FROM WHICH ALL LOADING COILS AND BRIDGE TAPS HAVE BEEN

REMOVED, NO DELAY EQUALIZATION SHOULD BE REQUIRED. GIVEN THE CORRECT

FREQUENCY RESPONSE OVER THE RANGE OF .01 TO 50 KHz (NO DISCONTINUITIES

OR SHARP ROLLOFFS), ENVELOPE DELAY WILL NOT NORMALLY BE AN ITEM FOR

CONCERN ON CABLE PAIRS.

3. SHOULD THE CIRCUIT CONTAIN CARRIER FACILITIES, DELAY EQUALIZATION MUST

BE EMPLOYED SUCH THAT THE DELAY VERSUS FREQUENCY RESPONSE OF THE

CIRCUIT IS A SMOOTHLY AND CONTINUOUSLY INCREASING FUNCTION OF

FREQUENCY, WHICH FALLS WITHIN THE SHADED AREA OF THIS FIGURE.

EL3Z0046

Figure 4-10. Relative envelope delay vs frequency limits.

4-36