Specifications

When testing microstrip devices it is necessary to launch from coax to
microstrip. In production testing this launching must be temporary, so
that the device can easily be installed in and be removed from the
fixture. The requirement for launching is met by the Anritsu
Universal Test Fixture (UTF). The UTF provides accurate, repeatable
launch to substrates from 5 to 70 mils thick, and from 0.15 to 2 inches
long. Offset connections and right angles can be configured. DC bias
probes can be mounted to the UTF to inject bias onto the substrate.
UTF calibration/verification kits are available for alumina in 10 mil,
15 mil, and 25 mil microstrip, and for 25 mil coplanar waveguide.
Although a UTF is not essential, the following calibration procedures
presume its use.
Step 1. Select the desired LRL line substrates from the ap
-
propriate microstrip calibration kit. When called for
in the calibration sequence, mount the LRL line
substrates on the UTF following the procedure
given in the 3680 OMM.
Step 2.
Press Appl (top left) then TRANSMISSION AND
REFLECTION.
Step 3.
Press Cal (bottom left) then PERFORM CAL
2-PORT CAL.
Pressing this key starts a linked set of soft-key
choices that guide you through a measurement cali-
bration.
Step 4.
Observe the CAL METHOD and LINE TYPE
soft-key options. If they read LRL/LRM and
MICROSTRIP, respectively, go to step 6.
Step 5. Press the following soft keys in sequence:
CHANGE CAL METHOD AND LINE TYPE
CAL METHOD LRL/LRM
LINE TYPE MICROSTRIP
NEXT CAL STEP
Step 6. Press the following soft keys in sequence:
NEXT CAL STEP
INCLUDE ISOLATION (STANDARD)
This soft-key set lets you choose whether to include or
exclude the error terms associated with leakage be
-
tween measurement channels. For a normal calibra
-
tion, you would choose to include these error terms.
Step 7.
Press NORMAL (1601 POINTS MAXIMUM).
LRL/LRM MEASUREMENT
CALIBRATION CALIBRATION
7-28 MS462XX OM
Data Entry
Power
Keyboard
Port 3
Channels
Enhancement
Stimulus
System
Port 1
Port 2
Probe Power
1
8
5
2
9
6
3
-
.
G/ns/m
M/ s/cm

k/ms/mm
X1
Enter
Local
Appl
Meas
Marker
Hold
Ch 1
Ch 2
Ch 4
Ch 3
Freq
Sweep
Power
Config
Seq
Cal
Avg
Utility
Hard
Copy
Default
Save /
Recall
0
7
4
Display
Clr
Print
Soft
Keys
Appl
Data Entry
Power
Keyboard
Port 3
Channels
Enhancement
Stimulus
System
Port 1
Port 2
Probe Power
1
8
5
2
9
6
3
-
.
G/ns/m
M/ s/cm

k/ms/mm
X1
Enter
Local
Appl
Meas
Marker
Hold
Ch 1
Ch 2
Ch 4
Ch 3
Freq
Sweep
Power
Config
Seq
Cal
Avg
Utility
Hard
Copy
Default
Save /
Recall
0
7
4
Display
Clr
Print
Soft
Keys
Cal