1.1 Description

The NAV-1000 Aviation Navigation Signal Source is a comprehensive, configurable avionics navigation test platform used for testing navigation equipment, communication systems, and components. This test equipment provides a rich set of RF test functions and can be applied to the development, manufacturing, troubleshooting, and return‑to‑service testing of avionics navigation equipment. In addition to a user‑friendly touch‑screen graphical interface, it also offers a complete remote test control interface, providing unparalleled flexibility for equipment and repair to meet the user's unique needs.

Figure 1‑1 Appearance of the Signal Source Device

1.2 Functions

The NAV-1000 Aviation Navigation Signal Source provides output of the following signals:

NDB (Non‑Directional Beacon) Generator – Outputs a standard NDB signal. Carrier frequency: 190 kHz – 1750 kHz. Modulation signals: 400 Hz / 1020 Hz. Modulation depth: 0–99%. Morse code can also be set.

LOC (Localizer) Generator – Outputs a standard localizer signal. Carrier frequency: 108 MHz – 111.9 MHz. Modulation signal: dual tones of 90 Hz and 150 Hz. The modulation depth of each tone can be set independently. The modulation sum and difference are automatically calculated. The phase difference can also be set. Additionally, a Morse code with programmable coding is available.

G/S (Glide Slope) Generator – Outputs a standard glide slope signal. Carrier frequency: 328.6 MHz – 335.4 MHz. Modulation signal: dual tones of 90 Hz and 150 Hz. The modulation depth of each tone can be set independently. The modulation sum and difference are automatically calculated. The phase difference can also be set.

MKR (Marker Beacon) Generator – Outputs a standard marker beacon signal. Carrier frequency: 75 MHz. Modulation signals: 400 Hz (inner marker) single tone, 1300 Hz (middle marker) single tone, 3000 Hz (outer marker) single tone. The modulation depth of each audio signal can be set independently.

VOR (VHF Omnidirectional Range) Generator – Outputs a standard VOR signal. Carrier frequency: 108 MHz – 117.975 MHz. Modulation signals include a 30 Hz audio signal and a 9960 Hz subcarrier that is frequency‑modulated by the 30 Hz signal. Additionally, a Morse code with programmable coding and a single‑tone audio with adjustable frequency are available. The modulation depth of all four signals can be set independently. The phase difference between the two 30 Hz signals can be set.

VHF (Very High Frequency) Signal Generator – Outputs a VHF signal with a carrier frequency of 70 MHz – 400 MHz. The modulation signal consists of three independently generated audio tones from 300–3000 Hz. The frequency and modulation depth of each of the three audio signals can be set independently.

SELCAL (Selective Calling) Generator – Outputs a selective calling signal corresponding to letter‑coded tones. Carrier frequency: 70 MHz – 400 MHz. The modulation signal is a dual‑tone pulse signal. A call signal consists of 4 letters: 2 letters form one dual‑tone pulse, and 4 letters form a pair of dual‑tone pulses. The call signal can be programmed. Pulse duration, pulse interval, and SELCAL repetition interval can all be set.

1.3 Features

The NAV-1000 Aviation Navigation Signal Source has a standard 19‑inch chassis, a touch‑screen graphical interface for easy operation, and extended USB ports for external keyboard, mouse, etc. A standard network interface is available for remote control.

1.4 Interfaces

Figure 1-2 NAV-10 (Refer to original document)

Table 1-1: Front and Rear Panel Interfaces