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Cell phone:18126505465

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Address: Shenzhen City, Baoan District, Shajing Street, Nga side of the school of Wei Juji Industrial Park, Building A 1 ~ 2 floor, Building C 3 floor

Land/Maritime Interphone Product Testing

A walkie talkie can make calls without any network support, without incurring any charges. It is suitable for relatively fixed and frequent communication situations and consists of a housing, host, battery, belt clip, seat charger, and antenna. There are three main types of walkie talkies: analog walkie talkies, digital walkie talkies, and IP walkie talkies.

The following is a complete technical solution for testing land/maritime walkie talkie products, covering international standards, actual testing scenarios, and key indicator requirements, suitable for factory QA testing and third-party certification testing:

 

1、 Basic compliance testing
Wireless authentication testing

Transmission power: Land ≤ 5W (UHF)/Maritime ≤ 25W (subject to ITU-R M.1174)

Frequency compliance: Land (400-470MHz)/Maritime (156-174MHz VHF CH16 forced lock)

Stray radiation: ≤ -36dBm (FCC Part 90/ETSI EN 300 113)

Security certification testing

Explosion proof certification: ATEX/IECEx Zone1 (mandatory requirement for oil and gas platform machines)

Drop test: 6-sided drop from a height of 1.5m (MIL-STD-810G method 516.6)

Battery Safety: UL 2054 Overcharge/Short Circuit Protection Test

 

2、 Core Performance Testing Matrix
Testing items, testing equipment qualification standards, maritime special requirements
Receiving sensitivity of R&S CMW500 comprehensive tester ≤ 0.25 μ V (12dB SINAD) requires testing -120dBm weak signal capture
Audio Precision APx555 THD ≤ 3% @ 1kHz (microphone input 1Pa) with background noise reduction function ≤ 5%
Endurance: Constant temperature charging and discharging cabinet, 5W emission, continuous for ≥ 8h (standard battery), low temperature -20 ℃, endurance attenuation ≤ 30%
Channel switching speed vector signal generator Cross channel group switching ≤ 300ms DSC distress call response ≤ 5s
 

3、 Environmental reliability testing
Salt spray corrosion test

Standard: ISO 9227 Neutral Salt Spray Test

Conditions: 5% NaCl solution, continuous spray for 96h at 35 ℃

Judgment: The shell has no corrosion or expansion, and the button function is normal

Waterproof/dustproof test

IP68 verification: Soak in 1.5m water depth for 30 minutes (maritime aircraft need to reach IPX7/IPX8)

Dust test: IEC 60529 8-hour dust environment

Temperature shock test

Range: -30 ℃ (Arctic route) to+70 ℃ (equatorial deck)

Cycle: 10 fast changing cycles (MIL-STD-810H method 503.6)

 

4、 Special scenario simulation testing
Maritime multipath interference testing

Equipment: ETS Lindgren multipath simulation box

Scenario: Simulating Level 6 sea conditions with multipath delay (0.1-3 μ s dynamic variation)

Emergency distress function verification

DSC test: GPS positioning error ≤ 15m (IMO A.694 (17) standard)

One click alarm: continuously transmit distress coordinates for ≥ 30 minutes after triggering

Multi device networking testing

Land: 50 devices communicating simultaneously (testing TDMA time slot allocation)

Maritime: Verify data interoperability of AIS automatic collision avoidance system

 

5、 Test problem diagnosis and improvement
Common Failure Modes

PTT button adhesion in high humidity environment (silicone drainage groove design needs to be added)

Low temperature battery voltage drop (Li SOCl ₂ battery is recommended)

Key points of EMC rectification

Install EMI filter on antenna port (to suppress interference in the 30-88MHz frequency band)

Motherboard grounding impedance ≤ 20m Ω (critical grounding points require star topology)

 

6、 Certification and reporting requirements
Mandatory Certification Checklist

China: SRRC model approval (with water specific identification)

International: MED ship servo certification (requires DNV/GL type approval)

United States: FCC Part 80 (Maritime)/Part 90 (Land)

Test report elements

Contains radiation field strength map of 10m/1m/3m

Record of measured trajectories at sea (including at least 3 base station switches)

Battery charge discharge cycle life curve (100 cycle capacity retention rate)

Implementation suggestion:

Prioritize pre testing through CNAS 17025 accredited laboratories

Maritime aircraft models need to undergo 72 hours of continuous copying on real ships

Test Wi Fi connectivity using Anritsu MT8860C (if available)

6 individual

Large-scale experimental base

150 individual

Professional Lab

30 All kinds of

Analysis Method

8 million times

Testing/year