Can this be used to test the efficacy of EMP blocking cages and pouches?

It depends what frequency range you are testing and if you have the proper pickup antenna. The EMP noise source could be inside the cage/pouch and the analyzer with probe on the outside. Or, the analyzer and probe is inside the cage while the EMP noise is outside. Second scenario would be tricky to trigger and capture unless you use the waterfall.

can this be used to display and analyze noise on an AC power line?

You might be better off with an oscilloscope. The TinySA does not have high input impedance and a direct measurement on the power line would likely damage it (and be very unsafe).

Is this suitable for testing tv vhf and uhf signal strength?

Not an expert on TV VHF and UHF, but I believe the TinySA range covers the UHF and VHF spectrum. With some calibration and manual setting (research on YouTube) it will provide accuracy that meets most needs. It is not a $2500 SA, so expect a certain amount of "ok, but its only $50 bucks". Also, ATTENUATE if signal strength/input is expected to be high. Again, research videos with professional testing from engineers. There's plenty of help online.

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Portable TinySA Spectrum Analyzer,SEESII Upgraded V0.3.1 Handheld Tiny Frequency Analyzer 100kHz to 960MHz MF/HF/VHF UHF Input,Signal Generator with 2.8 inch Touch Screen with ESD Protect Function

Product ID: 229492526

Details

Brand
Seesii
Item Weight
1 Kilograms
Manufacturer
Seesii
Style
TinySA

📶100kHz-960MHz dual-band range

🔋2+ hours portable battery life

🖥️2.8-inch color touchscreen

20562 som

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Description

📡 Pocket-Sized Powerhouse: Spectrum Analysis Meets Ultimate Portability

BUILT IN SIGNAL GENERATOR - Switch from analyzer to signal generator mode with MF/HF/VHF sinusoidal and UHF square wave outputs for versatile testing.
DUAL BAND FREQUENCY MASTERY - Seamlessly analyze MF/HF/VHF (0.1-350MHz) and UHF (240-960MHz) bands with switchable resolution filters for pinpoint accuracy.
ESD PROTECTION DURABILITY - Enhanced antistatic design ensures longer device lifespan and stable performance even in demanding environments.
VIBRANT TOUCHSCREEN INTERFACE - Navigate complex spectrum data effortlessly on a crisp 2.8-inch color touchscreen designed for intuitive control on the go.
PC CONNECTIVITY FIRMWARE UPDATES - Easily connect via USB for advanced control, data export, and seamless firmware upgrades to stay ahead of tech curves.

The Portable TinySA Spectrum Analyzer is a cutting-edge handheld device covering 100kHz to 960MHz frequency ranges with dual inputs for MF/HF/VHF and UHF bands. Featuring a vibrant 2.8-inch touchscreen, built-in signal generator, and robust ESD protection, it offers professional-grade spectrum analysis and signal generation in a compact, rechargeable package. Ideal for RF interference hunting, ham radio enthusiasts, and wireless system troubleshooting, it supports PC connectivity and user-upgradable firmware, delivering high value at an accessible price point.

Specifications

Asin	B08FB5XT7B
Batteries	1 Lithium Ion batteries required. (included)
Best Sellers Rank	#42,985 in Industrial & Scientific (See Top 100 in Industrial & Scientific) #8 in Spectrum Analyzers
Date First Available	August 5, 2020
Item Model Number	TinySA
Item Weight	2.2 pounds
Manufacturer	Seesii
Package Dimensions	7.72 x 5.04 x 1.22 inches

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20562 som

Duties & taxes included

In stock

Sold byAmazon KyrgyzstanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Kyrgyzstan.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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