PHASE LOCKED OSCILLATOR
MODEL 621499 (500 MHz)
Features
! Low Phase Noise: -138 dBc/Hz @ 100 kHz
! Low Spurious: -70 dBc Typical
! External Reference: 100 MHz
! Environmental Screening Available
Description
Specifications
CHARACTERISTIC
TYPICAL
Ta= 25 ºC
500 MHz
+13
MIN/MAX
Ta = -20 ºC to +70 ºC
500 MHz
Spectrum Microwave’s Series 600 Phase Locked
Oscillators use a High “Q” Coaxial Resonator in
the resonant circuit. The circuit is lightly loaded to
obtain the lowest phase noise possible.
Frequency
Output Power (dBm)
+12
Variation Over
Temperature (dBm)
+/- 0.75 dBm
-70
+/- 1 dBm
-60
The resonator is soldered to a printed circuit
board and well grounded to minimize modulation
sidebands during shock and vibration.
Spurious (dBc)
Phase Noise (dB)
-113 dBc/Hz @ 100 Hz
-136 dBc/Hz @ 1 kHz
-138 dBc/Hz @ 10 kHz
-136 dBc/Hz @ 30 kHz
-138 dBc/Hz @ 100 kHz
-150 dBc/Hz @ 1 MHz
Buffer amplifiers are used to provide isolation
from load VSWRs; Regulators filter noise on
the DC input voltage.
VSWR
1.5
-25
2.0
-20
Harmonics (dBc)
External Reference
(MHz)
Internal reference models are also available.
A lock indicator circuit is provided to signal an
out-of-lock condition.
10
10
Lock Indicator
TTL (High=Locked)
-55 ºC
TTL (Low=Unlocked)
+125 ºC
StorageTemperature
Supply Power DC
mA
15
120
15
125
Spectrum Microwave, Inc.
www.SpectrumMicrowave.com
2707 Black Lake Place Phila, Pa. 19154
Rev.
9/19/08
PH: 215-464-4000 FAX: 215-464-4001
SPECTRUM [ SPECTRUM MICROWAVE, INC. ]
