HP 8568B Manual de usuario Pagina 221

  • Descarga
  • Añadir a mis manuales
  • Imprimir
  • Pagina
    / 313
  • Tabla de contenidos
  • MARCADORES
  • Valorado. / 5. Basado en revisión del cliente
Vista de pagina 220
14. 249 MHz Phase Lock Oscillator Adjustments
14. 249 MHz Phase
Lock Oscillator
Adjustments
Reference
Description
Equipment
RF Section:
A7
249 MHz Phase Lock Oscillator
Two center frequencies are chosen: one which will tune the 249 MHz
Oscillator to its low-end frequency and one which will tune the 249
MHz Oscillator to the high-end frequency. The voltage is monitored
with a DVM at the output of the oscillator, and the oscillator
frequency is adjusted to produce the proper dc voltage output for
each frequency (low-end and high-end). Next, the 500 kHz Trap is
adjusted to null the 500 kHz sidebands using the sixth harmonic of the
249 MHz signal.
SPECTRLM
ANALYZER
DIGITAL VOLTMETER
SPECTRUM ANALYZER
1
J
Figure 3-59. 249 MHz Phase Lock Oscillator Adjustments Setup
Spectrum Analyzer
.........................
HP
8566A/B
Amplifier
...................................... HP 8447F
Digital Voltmeter (DVM)
........................
HP
3456A
Tee, SMB Male
............................. HP 1250-0670
Adapters:
Type N (m) to BNC (f) . . . . . . . . . . . . . . . . . . . . . . . . .
1250-1250
Cables:
BNC cable, 122 cm (48 in) (2 required) . . . . . . . . . . . .
10503A
BNC to SMB Snap-On cable (2 required) . . . . . . 85680-60093
Adjustments
3-107
Vista de pagina 220
1 2 ... 216 217 218 219 220 221 222 223 224 225 226 ... 312 313

Comentarios a estos manuales

Sin comentarios