VTO-8580 - Agilent / Hewlett-Packard

9-23

Varactor-Tuned Oscillators

Technical Data

VTO-8000 Series

Pin Configuration

TO-8V

Features

• 600 MHz to 10.5 GHz

Coverage

• Fast Tuning

• +7 to +13 dBm Output

Power

•±1.5 dB Output Flatness

• Hermetic Thin-film

Construction

GROUND

CASE GROUND

+DC

VOLTAGE

+V 3

OUT

TUNE

Description

HP VTO-8000 Series oscillators

use a silicon transistor chip as a

negative resistance oscillator. The

oscillation frequency is deter-

mined by a silicon abrupt varactor

diode acting as a voltage-variable

capacitor in a thin-film micro-

stripline resonator. This provides

extremely fast tuning speed,

limited primarily by the internal

impedance of the user-supplied

voltage driver. Fast settling is

another feature of the HP

VTO-8000 Series oscillators.

Typical settling times for the

VTO-8090 are <200␣ kHz within one

microsecond while the VTO-8950

settles to <2␣ MHz within two

microseconds referenced to ten

milliseconds. The VTO-8850

combines a bipolar transistor

oscillator with a GaAs FET buffer

stage. This GaAs FET buffer

isolates the oscillator from

variations in load impedance for

low frequency pulling, allows the

oscillator to run lighty-loaded for

low phase noise content and

provides +10 dBm of minimum

output power over the full tuning

range. The VTO-8000 Series

varactor-tuned oscillators are

packaged in TO-8 transistor cans

for simple installation in a

conventional 50-ohm micro-

stripline PC board. They are ideal

for most compact, lightweight

commercial and military equip-

ment designs. Test fixturing is

also available for lab bench test

applications. See the “Test

Fixtures for TO-8 Packages”

section for additional information

and outlines.

Applications

Frequency agile systems, such as

digitally controlled receivers and

active jamming transmitters often

use externally linearized

varactor-tuned oscillators. HP

oscillators are monotonic making

external linearization easy using

analog (opamp) or digital

(EPROM) linearizing techniques.

The HP VTO Series has been

designed with a tuning input

bypass capacitance which is

sufficient to provide the neces-

sary RF filtering action yet as low

as possible to maximize ∆V/∆T

characteristics for excellent

tuning speeds. Used in a phase

locked loop PLL circuit, a VTO

provides a receiver LO with

stability equivalent to the refer-

ence oscillator (usually crystal

controlled), yet variable in

discrete steps or continuously

depending on the PLL

configuration.

Another important aspect of VTOs

used in an LO application is their

power vs. frequency flatness

(±1.5␣ dB). This assures that once a

receiver mixer is biased for best

dynamic range the local oscillator

drive will remain constant

throughout the tuning range

without complex leveling

circuitry.

5964-9815E

9-24

Part Number VTO–8060 VTO–8080 VTO–8090 VTO–8150 VTO–8200

Frequency Range, Min. 600–1000 MHz 800–1400 MHz 900–1600 MHz 1500–2500 MHz 2000–3000 MHz

Power Output into 50–ohm Load,Min. 20 mW/+13 dBm 20 mW/+13 dBm 20 mW/+13 dBm 10 mW/+10 dBm 10 mW/+10 dBm

Power Output Variation @ 25°C, Max. ±1.5 dB ±1.5 dB ±1.5 dB ±1.5 dB ±1.5 dB

Operating Case Temperature Range 0° to +65°C0° to +65°C0° to +65°C0° to +65°C0° to +65°C

Frequency Drift Over Operating 8 MHz 10 MHz 10 MHz 18 MHz 30 MHz

Temperature, Typ.

Pulling Figure (12 dB Return Loss), Typ. 25 MHz 25 MHz 25 MHz 35 MHz 35 MHz

Pushing Figure, +15 VDC Supply, Typ. 5 MHz/V 6 MHz/V 6 MHz/V 6 MHz/V 6 MHz/V

Harmonics, Below Carrier, Typ. –15 dB –15 dB –15 dB –15 dB –18 dB

Spurious Output Below Carrier, Min. –60 dB –60 dB –60 dB –60 dB –60 dB

Tuning Voltage

Low Frequency 3±1 VDC 2±1.5 VDC 2±1 VDC 2.5±1 VDC 2+2/–1 VDC

High Frequency 40±8 VDC 35±10 VDC 48+8/–10 VDC 47±8 VDC 20±4 VDC

Maximum Tuning Voltage +60 VDC +60 VDC +60 VDC +60 VDC +45 VDC

Tuning Port Capacitance, Nom. 180 pF 180 pF 180 pF 90 pF 45 pF

Phase Noise, Singie Sideband,

1 Hz Bandwidth, Typ.

50 kHz From Carrier –110 dBc/Hz –100 dBc/Hz –100 dBc/Hz –95 dBc/Hz –95 dBc/Hz

100 kHz From Carrier –117 dBc/Hz –107 dBc/Hz –107 dBc/Hz –102 dBc/Hz –102 dBc/Hz

Input Power ±1% Regulation

Voltage, Nom. +15 VDC +15 VDC +15 VDC +15 VDC +15 VDC

Current, Max. 50 mA 50 mA 50 mA 50 mA 50 mA

Case Style TO–8V TO–8V TO–8V TO–8V TO–8V

Part Number VTO–8240 VTO-8360 VTO–8430 VTO–8580

Frequency Range, Min. 2400–3700 MHz 3600–4300 MHz 4300–5800 MHz 5800–6600 MHz

Power Output Into 50–ohm Load, Min. 10 mW/+10 dBm 10 mW/+10 dBm 10 mW/+10 dBm 5 mW/+7 dBm

Power Output Variation @25°C., Max. ±1.5 dB ±1.5 dB ±1.5 dB ±1.5 dB

Operating Case Temperature Range 0° to +65°C0° to +65°C0° to +65°C0° to +65°C

Frequency Drift Over Operating 30 MHz 35 MHz 60 MHz 70 MHz

Temperature, Typ.

Pulling Figure (12 dB Return Loss), Typ. 35 MHz 40 MHz 50 MHZ 70 MHz

Pushing Figure, +15 VDC Supply, Typ. 6 MHz/V 6 MHz/V 6 MHz/V 8 MHz/V

Harmonics, Below Carrier, Typ. –18 dB –25 dB –25 dB –25 dB

Spurious Output Below Carrier, Min. –60 dB –60 dB –60 dB –60 dB

Tuning Voltage

Low Frequency 2+2/–1 VDC 8±2 VDC 1.0 VDC Min 5±2.5 VDC

High Frequency 30±8 VDC 24±4 VDC 20.0 VDC Max. 24+3/–5 VDC

Maximum Tuning Voltage +45 VDC +30 VDC +30 VDC +30 VDC

Tuning Port Capacitance, Nom. 45 pF 45 pF 45 pF 45 pF

Phase Noise, Single Sideband,

1 Hz Bandwidth, Typ.

50 kHz From Carrier –95 dBc/Hz –100 dBc/Hz –90 dBc/Hz –85 dBc/Hz

100 kHz From Carrier –102 dBc/Hz –108 dBc/Hz –97 dBc/Hz –92 dBc/Hz

Input Power ±1% Regulation

Voltage, Nom. +15 VDC +15 VDC +15 VDC +15 VDC

Current, Max. 50 mA 50 mA 50 mA 50 mA

Case Style TO–8V TO–8V TO–8V TO–8V

Electrical and Performance Specifications

Guaranteed Specifications @ 25°C Case Temperature (0° to +65°C Operating Temperature)

9-25

Electrical and Performance Specifications

Guaranteed Specifications @ 25°C Case Temperature (0° to +65°C Operating Temperature)

Part Number VTO–8650 VTO–8810 VTO–8850 VTO–8950

Frequency Range, Min. 6500-8600 MHz 8100–9100 MHz 8500–9600 MHz 9500–10500 MHz

Power Output Into 50–ohm load, Min. 10 mW/+10 dBm 10 mW/+10 dBm 10 mW/+10 dBm 10 mW/+10 dBm

Power Output Variation @ 25°C., Max. ±1.5 dB ±1.5 dB ±1.5 dB ±1.5 dB

Operating Case Temperature Range 0° to +65°C0° to +65°C0° to +65°C0° to +65°C

Frequency Drift Over Operating 100 MHz 110 MHz 110 MHz 160 MHz

Temperature, Typ.

Pulling Figure (12 dB Return Loss), Typ. 15 MHz 8 MHz 10 MHz 20 MHz

Pushing Figure, +15 VDC Supply, Typ. 10 MHz/V 12 MHz/V 15 MHz/V 10 MHz/V

Harmonics, Below Carrier, Typ. –20 dB –15 dB –25 dB –20 dB

Spurious Output Below Carrier, Min. –60 dB –60 dB –60 dB –60 dB

Tuning Voltage

Low Frequency 2±1 VDC 2 VDC Min. 5±2 VDC 4±1 VDC

High Frequency 20±5 VDC 16 VDC Max. 13±5 VDC 10 VDC Max.

Maximum Tuning Voltage 30 VDC +30 VDC +30 VDC +15 VDC

Tuning Port Capacitance, Nom. 26 pF 26 pF 26 pF 26 pF

Phase Noise, Single Sideband,

1 Hz Bandwldth, Typ.

50 kHz From Carrier –80 dBc/Hz –80 dBc/Hz –82 dBc/Hz –73 dBc/Hz

100 kHz From Carrier –88 dBc/Hz –88 dBc/Hz –90 dBc/Hz –80 dBc/Hz

Input Power ±1% Regulation

Voltage, Nom. +15 VDC +15 VDC +15 VDC +15 VDC

Current, Max. 50 mA 100 mA 100 mA 100 mA

Case Style TO–8V TO–8V TO–8V TO–8V

Schematic

RF OutputOutput Matching

+15 V

Resonator

Series Feedback

Tuning

Port

Capacitor

V Tune Varactor

9-26

Typical Performance @ 25ºC Case Temperature

9-27

9-28

Typical Performance (Continued)

–20

LOG £(f), dBc/Hz

Figure 14. Noise Comparison Single Sideband

Phase Noise.

FOURIER FREQUENCY, Hz

10k 100k 1M

–40

–60

–80

–100

–120

–140

–160 10M

8650

8240 8950

Figure 13. VTO–8950 Power Output, Frequency

and Modulation Sensitivity vs. Tuning Voltage.

802 46 810 0

200

400

600

800

12 14 16

FREQUENCY,

GHz

TUNING VOLTAGE, VDC

POWER

OUTPUT, dBm

MODULATION

SENSITIVITY, MHz/V

POWER OUTPUT

TUNING CURVE

MODULATION

SENSITIVITY

TO-8V Case Drawing

.50

DIA .45

DIA

.18

.22

MIN

.150

TYP

.300

TYP GROUND

CASE

GROUND

.150

TYP

APPROXIMATE WEIGHT 1.7 GRAMS

.017 +.002

.300

TYP

VTUNE

–.001

RFOUT

GLASS RING

.060 DIA TYP

(3X)

NOTES (UNLESS OTHERWISE SPECIFIED):

1. DIMENSIONS ARE SPECIFIED IN INCHES

2. TOLERANCES: xx ± .02

xxx ± .010

9-29

Test Fixtures for

TO-8␣ Packages

(TF 801/802)

Oscillators (VTO)

Features

• DC to 11 GHz Frequency

Range

• Connectorized Tuning Port

and RF Output

• Easy to Test Package

• Repeatable Performance

Applications

• Engineering

Characterization

• Incoming Inspection

• System Prototype

• Demonstration of Device

Performance

Description

To facilitate testing and

prototyping of products in the

TO-8V package, a series of test

fixtures is available. Designated

the HP TF Series test fixtures,

they feature rugged construction

for precise, repeatable

measurements.

The TF Series test fixtures come

supplied with mounting hardware

to ensure excellent ground

contact between the oscillator

package and test fixture. This

assures excellent contact between

package pins and test fixture

connector pins for reliable testing.

The device under test is aligned

according to Figure 15, and

pushed fully down onto the

fixture. The steel mounting ring

clamp is placed over the device

under test and secured by ma-

chine screws prior to testing.

Orientation of pins can be verified

by comparison with part (c) of

Figure 15. It is recommended that

both machine screws be used to

fasten the ring clamp. Screws

should be tightened down snugly

with a jewelers type screwdriver.

For different connector options

check the table in Figure 15 to

identify the correct part numbers.

It should be noted that some

output power variation may be

seen, from unit data, at frequen-

cies above 8 GHz. This is

due to small differences in lengths

of test fixture RF output

connector pins.

Figure 15. TO-8 Test Fixture.

GROUND

TUNING VOLTAGE

.150

TYP

.300

TYP

CASE

GROUND

.150

TYP

OUT

.45

+ TUNING

VOLTAGE

+DC VOLTAGE

(Bottom View)

GROUND

OUT

(c)

+ TUNING

VOLTAGE

GROUND TAB ON PACKAGE

TUNING VOLTAGE

CONNECTOR

POWER INPUT

CONNECTOR

.35

.70

(b)(a)

.15

.45

.83

.55

VTO IN

PLACE

OUT

GROUND

.53

.65

.20

CONNECTOR OPTIONS

SERIES

TF-801

TF-802

TUNING

VOLTAGE

SMA

OUTPUT

SMA

TYPE N