VERTEX-VX 821

Withstands Harsh Environments
Water, dust, temperature extremes, shock, and vibration are no problem for these radios manufactured to rugged Military Standards specifications. The VX-820 Series also meets international waterproofing standard IP57 where water does not harm the radio when submersed to a depth of 1 meter for up to 30 minutes.

Tailored Communications to Meet Your Demands
Get the ultimate signaling performance with a choice of multiple 2-tone Encode and decode or 5-tone signaling to support the most advanced communications needs from individual to fleet operations. The front panel also includes a 7-color LED with a variable flash pattern for custom incoming call alerts.

When Safety Counts – Never Be Alone
When help is needed, the VX-820 Series has an Emergency notification that will switch to a designated channel and send an emergency alert. The radios also include Remote Listen which turns the radio on remotely if needed to check out what is happening near the radio.

Loud Audio for Noisy Environments
With 700 mW audio output, be assured of hearing the critical information you need in most situations.

Exclusive Auto-Range Transpond System – ARTS™
Only Vertex Standard radios are designed to inform you when you and another ARTS™-equipped station are within communication range. If out of range for more than 2 minutes, your radio senses no signal has been received and beeps to alert you. The base station can then alert the field unit to move back in range. A great solution to keep your workers coordinated.

General Specification

Frequency Range
VHF: 134 – 174 MHz
UHF: 400 – 470 MHz

Number of Channels and Groups
512 and 32 Groups (VX-829/VX-824)
16 and 1 Group (VX-821)

Power Supply Voltage
7.4 V DC ± 20%

Channel Spacing
12.5 / 20 / 25 kHz

PLL Steps
5 / 6.25 kHz

Battery Life (5-5-90 duty) 1500 mAh FNB-V100LIEX
VHF: 16.5 hrs (12.5 hrs w/o saver)
UHF: 16 hrs (12.2 hrs w/o saver)

IP Rating
IP 57

Operating Temperature Range
–10° C to +55°C

Frequency Stability
±2.5 ppm

RF Input-Output Impedance
50 Ohms

Dimension (H x W x D)
96.5 x 57.5 x 41 mm

Weight (Approx.)
335 g (w/FNB-V100LIEX, Antenna and Belt Clip)

Receiver Specification: measured by EN 300 086

Sensitivity 20 dB SINAD
-4 / -2 dB μV emf

Adjacent Channel Selectivity
75 / 65 dB

Intermodulation
65 dB

Spurious and Image Rejection
70 dB

Hum and Noise
48 / 42 dB

Audio Output
700 mW @ 16 Ohms 5% THD

Transmitter Specification: measured by EN 300 086

Output Power
1 / 0.5 W

Modulation Limiting
±5.0 kHz @ 25 kHz
±4.0 kHz @ 20 kHz
±2.5 kHz @ 12.5 kHz

Spurious Emissions
-36 dBm @ ≤ 1 GHz, – 30 dBm @ > 1 GHz

FM Hum & Noise
45 / 40 dB

Audio Distortion
< 3 % @1kHz

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