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General requirements:

The input is DC 12V (+30 / -10%)

Transmitter section

Transmission power 25W, you can manually select as low as 1W.
Transmission audio harmonic distortion ≤10%.
Audio Response +1/-3dB of +6dB/octave.
AC Noise ≤-40dB
The maximum deviation± 5KHz.
Parasitic radiation ≤0.25μW.
When current consumption 25W 5A.

Receiver section

Frequency range: 156.025MHz~­­163.275MHz.
The first IF 21.7MHz, the second IF 450KHz.
Noise by 20dB when the maximum available for the sensitivity of≤0.4μV.
Adjacent Channel Selectivity ≥70dB.
Spurious response suppression ≥70dB.
Intermodulation suppression ≥68dB.
Spurious emission suppression ≤2nW.
Maximum current consumption of the audio output 0.9A; standby 0.3A.
Audio response +1/-3dB of +6dB/octave.
AC Noise ≤-40dB.
10% audio distortion when the output power of built-in speaker 2W, external speaker 3.5W.

70 channel receiver section

Continuous duty to 70 channels.
Receiving frequency 156.525MHz.
Receive mode 16K0G2B.
Yu-character error rate of 10-2, the maximum usable sensitivity≤0.6μv.
The first IF 17.9MHz, the second IF 455KHz.
Adjacent Channel Selectivity≥70dB.
Spurious response suppression≥70dB.
Intermodulation suppression≥68dB.
Spurious emission suppression≤2nW

Digital selective calling section 

HX2000 meet lTU-RM.493-13 on DSC system requirements.
DSC can encode and decode messages.
DSC can manually write the message content.
Can store 20 calls from the identification number (MMSI) and contact name.
Automatically into the calibration of the DSC message.