VIAVI ATB-7300NG Avionics NAV Bench Test Set

Bench-top avionics NAV signal generator for VHF, ILS localizer and glide slope, VOR, ADF and marker beacon testing.

Frequency range: 100 kHz to 6 GHz
Frequency resolution: 1 Hz
Frequency accuracy: ±0.1 ppm
RF level accuracy, 1 MHz to 400 MHz: ±1.2 dB

Datasheet

Overview

The VIAVI ATB-7300NG is a bench-top navigation signal generator. OEMs and MRO return-to-service shops use it to confirm the performance of VHF, ILS localizer and glide slope, VOR, ADF and marker beacon equipment.

The test set is built on the VIAVI AXIe Avionics Test Bench (ATB) platform, which is designed for users from OEMs to repair shops. The platform covers every stage of the avionics lifecycle: product development, design verification and validation, certification, manufacturing, return-to-service, and service/calibration.

Signal generation

The unit has separate generators for VHF COMM (AM and SELCAL modes), ILS localizer, ILS glide slope, VOR, ADF and marker beacon signals. Each generator lets the user set tone frequencies, modulation depths and IDENT parameters, including Morse code identification. The VHF generator also handles SELCAL tones and tone sequences.

Control and compatibility

The ATB-7300NG has a basic graphical user interface and an Ethernet remote control interface. It offers legacy command set compatibility with the NAV-2000R, the ATN-7300 and the Collins 479S-6A.

Key Features

Legacy command set compatibility for NAV-2000R, ATN-7300 and Collins 479S-6A
Ethernet remote control interface
VHF generator with control of modulation frequency, modulation depth (up to 3 sources), SELCAL tones, frequency and tone sequences
ILS/Localizer generator with control of 90 Hz and 150 Hz tone frequencies, modulation depths, left/right DDM and IDENT settings including Morse code
ILS glide slope generator with control of 90 Hz and 150 Hz tone frequencies, modulation depths and up/down DDM
VOR generator with control of 30 Hz Var/Ref and 9960 Hz tone frequencies, modulation depths, 9960 Hz deviation, VOR bearing, to/from and IDENT settings
ADF generator with control of modulation frequency, modulation depth and IDENT settings
Marker/beacon generator with selection of Outer, Middle and Inner marker beacon tones and control of tone frequencies, modulation depth and IDENT settings
Basic graphical user interface (GUI) for access to test features

Specifications

Signal Generator

Frequency range	100 kHz to 6 GHz
Frequency resolution	1 Hz
Frequency accuracy	±0.1 ppm
RF level accuracy, 1 MHz to 400 MHz	±1.2 dB -125 dBm to +4 dBm, RF output port
RF level accuracy, 400 MHz to 3 GHz	±0.9 dB -125 dBm to +4 dBm, RF output port
RF level accuracy, 3 GHz to 6 GHz	±1.6 dB -125 dBm to +4 dBm, RF output port
Phase noise	-114 dBc/Hz at 10kHz offset
Harmonics	<-33 dBc
Non-harmonics	<-50 dBc

Marker Beacon (MKR) Generator

Tone frequency range	30 Hz to 7,400 Hz
Tone frequency resolution	1 Hz
Default tone, Outer	400 Hz
Default tone, Middle	1.300 kHz
Default tone, Inner	3.000 kHz
% Modulation range	0-99%
% Modulation resolution	1%
% Modulation default	95%
Outer IDENT dot time	0 ms, fixed
Outer IDENT gap time range	50 ms to 250 ms Resolution 1 ms; default 125 ms
Outer IDENT dash time range	150 ms to 750 ms Resolution 1 ms; default 375 ms
Middle IDENT dot time	125 ms, fixed
Middle IDENT gap time	125 ms, fixed
Middle IDENT dash time	375 ms, fixed
Inner IDENT dot time	83 ms, fixed
Inner IDENT gap time	83 ms, fixed
Inner IDENT dash time	0 ms, fixed

ILS Generator

Phase shift range	0.0 to 359.9° Resolution 0.1°; default 0.0°
Total MOD	Not to exceed 99% LOC includes 1,020 Hz IDENT modulation
DDM range (Glideslope)	0.000 to 0.800 DDM
DDM range (Localizer)	0.000 to 0.400 DDM
DDM resolution	0.001 DDM Default 0.000 DDM
Total system error (Glideslope)	±0.001 DDM from 0.000 to 0.045 DDM; ±2% of setting from 0.045 to 0.400 DDM
Total system error (Localizer)	±0.001 DDM from 0.000 to 0.045 DDM; ±2% of setting from 0.045 to 0.200 DDM
90 Hz tone setting range	72 Hz to 108 Hz Glideslope and localizer tone settings
150 Hz tone setting range	120 Hz to 180 Hz Glideslope and localizer tone settings
Tone frequency resolution	1 Hz
Tone frequency accuracy	±0.01%
Tone distortion	<0.40% THD
90 and 150 Hz modulation	Total MOD not to exceed 99% Default 20%
Modulation overall accuracy	±2% for 5% to 90% AM

VOR Generator

Bearing range	000.0° to 359.9° Resolution 0.1°
Radial accuracy	±0.05°
30 VAR and 30 REF frequency range	20 Hz to 40 Hz Resolution 1 Hz; default 30 Hz
9960 frequency range	9 kHz to 11 kHz Resolution 1 Hz; default 9,960 Hz
Tone accuracy	±2% of setting
Tone distortion	<0.40% THD
30 VAR and 9,960 MOD range	Total % MOD not to exceed 99% Includes 1,020 Hz IDENT modulation; default 30%
Modulation overall accuracy	±2% for 5% to 90% AM
Frequency deviation range	240 Hz to 540 Hz Resolution 1 Hz; default 480 Hz

IDENT (ADF, ILS LOC and VOR)

IDENT code valid characters	A-Z, 0-9
IDENT code length	1 to 5 characters Default IDENT
Word rate range	1 sec. to 65 sec. Default 10 sec.; resolution 1 sec.
Frequency range	10 Hz to 18 kHz Resolution 1 Hz; default 1,020 Hz
Frequency accuracy	±0.01%
Modulation range	Total % MOD not to exceed 99% Resolution 0.01%; default 0.00%
Modulation overall accuracy	±2% for 5% to 90% AM
Distortion	<0.40% THD
Dot time range	50 ms to 250 ms Default 150 ms; resolution 1 ms
Gap (dot/dash) time range	50 ms to 250 ms Default 150 ms; resolution 1 ms
Dash time range	150 ms to 750 ms Default 450 ms; resolution 1 ms
Character spacing range	150 ms to 750 ms Default 450 ms; resolution 1 ms

VHF COMM Generator

AM mode modulation frequency range (per tone)	30 Hz to 18 kHz Default 1 kHz; resolution 1 Hz
AM mode modulation accuracy	±1% from 10% to 90%
AM mode modulation range	Total % MOD not to exceed 99% Default (per tone) 30%
AM mode distortion	<0.40% THD
SELCAL mode	user selectable tone set with programmable tone periods.
SELCAL P1 and P2 code range	2 characters
SELCAL valid characters	A through H, J through M, P through S
P1 and P2 tone frequency range	Set from code, 312.6 Hz to 1,479.1 Hz
Pulse MOD range	0.00% to 99% Applies to ALL pulses including test tone; resolution 0.01%; default 90.00%
P1 and P2 time range	0.000 to 2.000 sec. Resolution 0.001 sec.; default 1.000 sec.
Gap time range	0 to 999 ms Resolution 1 ms; default 200 ms
Test tone frequency range	10 Hz to 18 kHz Default 1020 Hz; resolution printed as 1 ms in the datasheet
Test tone MOD range	0.00% to 99% Resolution 0.01%; default 30.00%
Test tone enable	ON (Checked) or OFF (Unchecked)

Environmental

Operating temperature	0° - 50° C
Storage temperature	-40° - 71° C
Humidity	95% to 40° C in accordance with MIL-PRF-28800F
Altitude	4,600 m
Functional shock	30 G in accordance with MIL-PRF-28800F
Random vibration	5 Hz - 500 Hz in accordance with MIL-PRF-28800F

Regulatory

Safety compliance	IEC / EN 61010-1
EMC compliance	IEC / EN 61326-1, IEC / EN 61000-3-2, IEC / EN 61000-3-3
Environmental class	MIL-PRF-28800F Class 3

Mechanical

Rack units mA-1302	2U x 19”
Dimensions mA-1302	432 mm (W) x 88 mm (H) x 435 mm (D)
Weight mA-1302	10.5 kg (23.1 lbs)
Acoustic emissions	78 LWA dB (max), 63 LWA dB (typical)

Interfaces

Remote control interface	Ethernet
Front RF output	SMA female (1 total) Connectors currently available for use
Front USB	USB 3.0 Type A (4 total) Connectors currently available for use
Front Ethernet	Gigabit Ethernet (1 total) Connectors currently available for use
Front display output	DisplayPort (1 total) Connectors currently available for use
Rear	1588v2 (1 total) Connectors currently available for use