Signal format requirements.

CFR · 2024-01-01 · US · Title 14

The signals radiated by the MLS must conform to the signal format in which angle guidance functions and data functions are transmitted sequentially on the same C-band frequency. Each function is identified by a unique digital code which initializes the airborne receiver for proper processing. The signal format must meet the following minimum requirements: (a) (b) (2) Rotation of the receiving antenna thirty degrees from the vertically polarized position must not cause the path following error to exceed the allowed error at that location. (c) (1) DPSK. The DPSK signal must have the following characteristics: (2) CW. The CW pulse transmissions and the CW angle transmissions as may be required in the signal format of any function must have characteristics such that the requirements of paragraph (d) of this section are met. (d) (e) (f) (g) (h) (i) (1) (i) (ii) (2) (i) Preamble. Must be in accordance with requirements of § 171.311(i)(1). (ii) (A) (B) (C) The duration of each pulse measured at the half amplitude point shall be at least 100 microseconds, and the rise and (D) (iii) (A) (B) (C) (iv) (3) (i) (ii) (j) (1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12) (13) (14) (k) (l) (m) (2) (3) (i) (ii) (iii) (iv) (v) (vi) (vii) (viii) (ix) (x) (xi) (xii)

official document · source cfr-2024 · id 14:§ 171.311