A720T (VHF) Service Manual V1.0
25/56
Chapter 7 Radio Debugging
7.1 The required test equipment
1. Stabilized power supply
1)The out power can be adjusted from 5V to 15V, and its current is 3A or even bigger.
2)standard voltage is 7.5V.
2. Ampere meter
1)Advanced ampere meter(17 gears and other functions)
2)Full scale can be set as 300mA or 3A.
3)It must use low loss cable.
3. Digital voltmeter
1)Voltage range: approximate FS=18V.
2)Input impedance: 1MΩ or even bigger.
4. Oscilloscope
1)Measuring range: DC to 30MHZ.
2)High accuracy measurement can be provided from 5 to 25MHz
5. Spectrum analyzer
Measurement range: DC to 1GHz or even bigger
6. Dummy load
16Ω
，
3W or even bigger
7. General-purpose tester
8920A/8921A/8920B/3920
Summary of Contents for A720T
Page 1: ...A720T VHF Service Manual V1 0 1 56 A720T VHF Service Manual ABELL INDUSTRIES CO LTD ...
Page 10: ...A720T VHF Service Manual V1 0 10 56 4 2 Explosive View ...
Page 49: ...A720T VHF Service Manual V1 0 49 56 Fig 1 A720T BIT Map TOP Side ...
Page 50: ...A720T VHF Service Manual V1 0 50 56 BOT Side ...
Page 56: ...A720T VHF Service Manual V1 0 56 56 Fig 4 A720T Packing ...
