UHF3 (350-400MHz) Information Service Manual
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Description of Normal Situations:
[1] Voltage of the power supply: about 7.4V.
[2] For low power, APC-OUT: 1.8-2.1V; for high power, APC-OUT: 2.4-2.8V.
[3] For low power, APC-IN: 1-1.3V; for high power, APC-IN: 1.8-2.1V.
[4] PS-APC: about 3.3V.
[5] TX5V: about 5V; RT5V: about 5V; PS-TX: about 3.3V.
[6] High power: about 4.2W; low power: about 1.2W.
[7] Start-up voltage of D9002: about 0.7V. The low-pass coil must be soldered appropriately and
remain in good condition. The spring plate for the antenna must well fit the antenna connector.
[8] The match components must not be soldered inappropriately or damaged.
[9] Vdd: about 7.3V; for low power, Vgg: 1-1.2V; for high power, Vgg: 1.35-1.55V.
[10] Vdd: about 7.3V; for low power, Vgg: 1.7-2.1V; for high power, Vgg: 2.4-2.8V.
[11] Vc: about 4.8V; Vb: about 1.4V; Ve: about 1.1V.
[12] Vc: about 4.7V; Vb: about 0.7V; Ve: 0V. Start-up voltage of D9007: about 0.7V.
Note
The above check operations should be made under 7.4V voltage.
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