6.2 Measurement
6-3
6.2 Measurement
6.2.1 VHF Frequency
As a reference oscillator for this equipment, TCXO (Temperature Compensated Crystal
Oscillators) is used. And there is no adjustment part of frequency.
Regulated range of frequency tolerance is 10 ppm (+1.5 kHz approximately). If
the tolerance is more/less than +10 ppm, replace CPU board or Y1 (TCXO: 25.6 MHz)
on CPU board.
Connect the frequency counter as below. Read the frequency of the setup channel when
PTT switch is ON.
The frequency tolerance: 10 ppm
Fig. 6.2.1 Frequency Measurement
or
50 ohm
Dummy
Antenna
FM-8800S
FM-8800D
ANT
CH70 ANT
50 ohm
Power meter
Handset
Freq. Counter
The input to a frequency counter approximates the pick-up coil to a
dummy load or ANT coaxial cable and picks up TX frequency.
Содержание FM-8800
Страница 3: ......
Страница 4: ......
Страница 5: ......
Страница 6: ......
Страница 7: ......
Страница 8: ......
Страница 9: ......
Страница 10: ......
Страница 12: ... Addenda No 9 of this page is missing ...
Страница 13: ......
Страница 18: ......
Страница 36: ......
Страница 62: ...2 1 Main Unit 2 11 Photo 2 1 21 PANEL 05P0772 A side Photo 2 1 22 PANEL 05P0772 B side LCD p c b ...
Страница 63: ...2 1 Main Unit 2 12 Photo 2 1 23 RTC board 05P0804 Russian Ver ...
Страница 235: ......
Страница 236: ......
Страница 237: ......
Страница 238: ......
Страница 239: ......
Страница 240: ......
Страница 241: ......
Страница 242: ......
Страница 243: ......
Страница 244: ......
Страница 245: ......
Страница 246: ......
Страница 247: ......
Страница 248: ......
Страница 249: ......
Страница 250: ......
Страница 251: ......
Страница 252: ......
Страница 253: ......
Страница 254: ......
Страница 255: ......
Страница 256: ......
Страница 257: ......
Страница 258: ......
Страница 259: ......
Страница 260: ......
Страница 261: ......
Страница 262: ......
Страница 263: ......
Страница 264: ......
Страница 265: ......
Страница 266: ......
Страница 267: ......
Страница 268: ......