Miteq D-9301, Руководство по эксплуатации и обслуживанию, Страница: 45 / 86

4-11
4.3.2.2 Frequency Synthesizer (A3A2)
The microwave frequency synthesizer incorporates multiple loop,
digital phase locking techniques to produce an RF output
frequency in steps of 125 kHz. Phase lock loop bandwidths are
adjusted for best overall phase noise performance.
Due to the complexity of the microwave synthesizer, it is
recommended that all service be referred to the factory.
The specifications for the synthesized source are:
A. Frequency Output: 4800-5300 MHz
B. Frequency Input: 5 MHz
C. Power Output: +13 dBm minimum
D. Power Input: 0±3 dBm
E. DC Power: +20V at 1.0A, +5V at 1.5A
F. Phase Lock TP: DC voltage variable with
frequency
G. Connectors -
1. RF: SMA female
2. DC: "D" connector
Function Pin
+20V 1, 6
+5V 4, 8
Ground 5, 9
Phase Voltage 2
Alarm 3
3. Control: Ribbon cable
An isolator (A3A3) and fixed attenuator (A3A5) follow the phase
lock source. The isolator provides load isolation and the
attenuator is used to provide level adjustment. A coupler (A3A4)
is used to provide a rear panel test point frequency/power
monitor of the synthesizer output.