9-29
Test Fixtures for
TO-8Packages
(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
RF
OUT
34
21
.45
+ TUNING
VOLTAGE
+DC VOLTAGE
(Bottom View)
GROUND
RF
OUT
(c)
+ TUNING
VOLTAGE
PIN
GROUND
TAB ON PACKAGE
V
DC
DC
PIN
TUNING VOLTAGE
CONNECTOR
POWER INPUT
CONNECTOR
.35
.35
.35
.70
(b)
(a)
.15
.45
.83
.55
.65
VTO IN
PLACE
RF
OUT
GROUND
.53
.20
CONNECTOR OPTIONS
SERIES
TF-801
TF-802
TUNING
VOLTAGE
SMA
SMA
RF
OUTPUT
SMA
TYPE N