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Changing Bands/
Modules While in Millimeter
Wave
The effect of changing millimeter wave bands while in Millimeter
Wave mode operation will be to (1) change the sweep frequency range
to the default range for the new band and (2) delete any current RF
calibrations. Therefore, the Caution on page 14-11 applies. Actually, it
is unlikely that any calibration would be valid if the modules are
changed. (This is because of manufacturing variations from module to
module.)
To configure the system for a different band or for one or more differ-
ent modules, follow the exact same steps as described on pages 14-11
through 14-13, except that only the new band or module types are
changed.
Allowable Millimeter Wave
Module Configurations, Mea-
surements and Calibrations
The S-parameter measurements and RF calibrations allowed are a
function of the type of millimeter wave module users have selected in
Menu MMW2. Note that one could actually have only one module and
still make reflection-only measurements. The criteria in Table 14-4 ap-
plies.
Effect of Default Program
Because the system is reconfigured for Millimeter Wave mode opera-
tion, the effects of performing a “Default Program” are somewhat dif-
ferent. Performing a default program operation, either from the front
panel or via the GPIB will have the following results.
q
Default-Default:
The Millimeter Wave operating band, its associated frequency range,
multipliers, and millimeter wave module types will remain un-
changed. If the frequency range has been modified from the default
values for the band, the modified values will remain in force. The cur-
rent sweep range will be set to the band frequency range. This is con-
sistent with other similar setup parameters, such as GPIB addresses.
Also see below.
q
Default-1:
37XXXC OM
14-17
MILLIMETER WAVE
OPERATION
MMW
Modules
Allowed
S-Parameters
Allowed RF Calibrations
Port 1
Port 2
S11
S12
S21 S22
12
Term
Forward
1 Path 2 Port
Reverse
1 Path 2 Port
Reflection
P1
Reflection
P2
Forward
Trans
Reverse
Trans
3740
3740
X
X
X
X
X
X
X
X
X
X
X
3740
3741
X
X
X
X
X
3741
3740
X
X
X
X
X
3741
3740
b1/1
b2/1 b2/1 b1/1
X
X
X
Table 14-5.
Calibration Criteria
Содержание 37 C Series
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