Now's The Time To Save
Save $1,000's on UNI-T Spectrum Analyzers and Oscilloscopes. Bundles and Discounts available until 03/31/26 on UTS1000, UTS3000MSO2000X, MSO3000X, and MSO7000X. Learn more about the bundles here.
 
Check out our CLEARANCE Section for unbelievable savings. 

UTS7000A-AMA Analog demodulation measurement option for UTS7000A series

$999.00
Save {price}%

Description

UTS7000A-AMA (Analog Modulation Analysis) Ideal for broadcast engineers, two-way radio technicians, and anyone working with AM, FM, or PM analog signals. Delivers comprehensive analog demodulation with measurements including modulation depth, frequency deviation, and carrier characteristics.


Top Specifications

For use with the UTS7000A-Series

Register today for a 15% EDU Discount

Guarantee safe & secure checkout

trust2

UNI-T UTS7000A Options Series

OVERVIEW

DOCUMENTATION

UTS7000A-AMA: Analog Modulation Analysis

Overview

The UTS7000A-AMA software option turns the Interceptor-Series analyzer into a dedicated analog modulation analyzer for AM, FM, and PM signals. Analog modulation isn't legacy technology—it's the foundation of aviation communications (VHF AM), marine radio (VHF FM), land mobile radio (FM), broadcast radio (AM/FM), and countless industrial telemetry systems. Even modern systems like FMCW radar use FM modulation principles. The AMA option provides calibrated demodulation and measurement of modulation parameters that would otherwise require a separate dedicated instrument or tedious manual calculation from spectrum data.

The UTS7000A's frequency coverage from 2 Hz to 40 GHz means you can analyze analog modulation on everything from a 100 MHz FM broadcast transmitter to a 24 GHz FMCW radar chirp—all on one instrument with calibrated, one-button measurements.

What the AMA Option Measures

AM Analysis: Measures modulation depth (5% to 95%), modulation frequency, carrier power, and carrier frequency offset. For broadcast engineers verifying transmitter compliance, the AMA provides direct readout of modulation depth without manual calculation from sideband levels. For aviation radio testing, accurate AM depth measurement is critical—over-modulation causes distortion and splatter into adjacent channels, while under-modulation reduces intelligibility.

FM Analysis: Measures frequency deviation (1 kHz to 400 kHz), modulation rate, carrier power, and carrier frequency offset. FM deviation measurement is essential for land mobile radio (LMR) compliance testing—Part 90 systems must maintain deviation within specified limits. The AMA also supports FMCW chirp analysis: measuring the linearity and deviation of frequency-modulated chirps used in radar and industrial distance measurement systems.

PM Analysis: Measures phase deviation (0.2 to 6.28 radians), modulation rate, and carrier characteristics. Phase modulation analysis is used in satellite communications, some radar systems, and precision measurement applications where phase stability is critical.

THD and SINAD: Total Harmonic Distortion and Signal-to-Noise-and-Distortion ratio are the key metrics for receiver sensitivity testing. SINAD measurement (12 dB SINAD defines the sensitivity spec for most analog radio standards) requires demodulating the recovered audio and measuring its quality. The AMA automates this entire chain—demodulate the FM signal, analyze the recovered audio, and report SINAD directly. Without this option, you'd need a separate audio analyzer after demodulation.

Audio Output: The analyzer's 3.5mm headphone jack provides real-time demodulated audio, allowing you to listen to the signal while measuring it. This is surprisingly useful for interference identification—you can hear the character of an interfering signal (hum, buzz, voice, data) while quantifying its modulation parameters.

Technical Specifications

Parameter Specification
Demodulation Frequency Range 2 MHz to 40 GHz
Carrier Power Accuracy ±2 dB (Nom.)
Input Power Range -30 dBm to +20 dBm (automatic attenuation)
AM Measurement
Modulation Rate 20 Hz to 100 kHz
Modulation Depth 5% to 95%
Depth Accuracy ±4% (Nom.)
Modulation Rate Accuracy 1 Hz (Nom.) below 1 kHz; <0.1% above 1 kHz
FM Measurement
Modulation Rate 20 Hz to 100 kHz
Frequency Deviation 1 kHz to 400 kHz
Deviation Accuracy ±4% (Nom.)
PM Measurement
Modulation Rate 20 Hz to 100 kHz
Phase Deviation 0.2 to 6.28 radians
Phase Deviation Accuracy ±4% (Nom.)
General
Option Type Software (can be added to existing analyzers at any time)
Compatible Models All UTS7000A models including standard and -NB variants

Frequently Asked Questions

Who still needs analog modulation analysis?

More engineers than you'd think. Aviation (118–137 MHz AM), marine (156–162 MHz FM), land mobile radio/LMR (VHF/UHF FM), broadcast radio (AM/FM), amateur radio, industrial SCADA telemetry, and FMCW radar all use analog modulation. If you support any of these systems—or need to identify unknown analog signals during EMI investigations—the AMA option provides the calibrated measurements that basic spectrum analysis can't.

Can the AMA option be added after purchasing the analyzer?

Yes. AMA is a software option activated through licensing—no hardware modification required. Contact your UNI-T representative or authorized distributor.

Does AMA work with the real-time analysis mode?

AMA operates in zero-span (time-domain) mode for demodulation, which is separate from the RTSA spectrogram/density display. However, you can use RTSA mode to identify and locate signals of interest, then switch to AMA for detailed modulation analysis—a powerful workflow for signal identification in congested RF environments.

Calibrated AM/FM/PM demodulation and SINAD measurement from 2 MHz to 40 GHz—one instrument for analog and digital worlds.

DATA SHEET
USER MANUAL
PROGRAMMING MANUAL
Not Currently Available. Contact us with questions.

Uni-Trend Spectrum Analyzer Accessories

Customer Reviews

Be the first to write a review
0%
(0)
0%
(0)
0%
(0)
0%
(0)
0%
(0)