CHARACTERISTIC

TYPICAL

MIN/MAX

Ta= 25 ºC

Ta = -20 ºC to +65 ºC

20

20

+12

+12

mA

265

275

PHASE LOCKED OSCILLATOR

VSWR

1.5

2.0

-90 dBc/Hz @ 1 KHz

-100 dBc/Hz @ 10 KHz

-105 dBc/Hz @ 100 KHz

-120 dBc/Hz @ 1 MHz

Spurious (dBc)

-80

-70

Variation Over

Temperature (dBm)

+/- 0.75

+/- 1

+13

+12

Features

!

!

!

!

! Low Phase Noise: -105 dBc/Hz @ 100 kHz

!

!

!

!

! Low Spurious: -80 dBc Typical

!

!

!

!

! Internal Reference Design

!

!

!

!

! Environmental Screening Available

Harmonics (dBc)

-20

-15

Spectrum Microwave, Inc.

2707 Black Lake Place Phila, Pa. 19154

www.SpectrumMicrowave.com

PH: 215-464-4000 FAX: 215-464-4001

Rev.

10/30/08

Description

Spectrum Microwave’s Series MDR5100 Phase

Locked Oscillators use a Dielectric Resonator in

the resonant circuit. The circuit is lightly loaded to

obtain the lowest phase noise possible.

The resonator is epoxied to a printed circuit

board and well grounded to minimize modulation

sidebands during shock and vibration.

Buffer amplifiers are used to provide isolation

from load VSWRs; Regulators filter noise on

the DC input voltage.

External reference models are also available.

A lock indicator circuit is provided to signal an

out-of-lock condition.

Notes:

1. Specifications labeled “min.” or “max.” are guaranteed in a 50 Ohm system over the

specified temperature range.

2. Output frequency must be specified, and it is an integer multiple of the internal crystal

reference frequency.

3. Mechanical tuning of PLO in unlocked mode.

4. Higher output power is available.

5. Phase Noise at offsets <100 kHz is dependent on external reference and can be

approximated as follows: Phase Noise (dB) = 20log(N) +3 dB above the external reference

phase noise, where N = multiple of reference.

6. Other input voltages are available.

7. Actual or impending loss of lock.

8. Package must be verified by Spectrum Microwave.

Lock Indicator

TTL (High=Locked)

TTL (Low=Unlocked)

Mechanical Tuning

+/- 20

+/- 20 Min.

Phase Voltage

Set to (nom.)

+5.0 VDC

Lock Range (min.)

+2 to +9 VDC

Phase-Lock Alarm

Transistor Collector (NPN)

Locked

Open Vc = 30 VDC max.

Saturated to Ground

Vce = +0.5 VDC max.

Ic = 50 mA max.