VTI Instruments EX1200 Series - RF Switching Applications

VTI Instruments Corp.
14 EX1200 Switching Overview
F
IGURE
2-1: S
TUB
B
REAKING
R
ELAYS
When programming switches to perform 2-wire and 4-wire measurements, the 2-wire and 4-wire
channel names must be used. For “standard” matrix cards (i.e. 2-banks of paired H/L inputs), the
2- and 4-wire name, the 1-wire names is used as the base. The convention is illustrated in
324H
Table 2-1 below:
1-Wire Channel Name 2-Wire Channel Name 4-Wire Channel Name
CH1_1L
CH1_1
CH_1
CH1_1H
CH2_1L
CH2_1
CH2_1H
CH1_2L
CH1_2
CH_2
CH1_2H
CH2_2L
CH2_2
CH2_2H
T
ABLE
2-1: S
TANDARD
2-
AND
4-
WIRE
N
AMING
C
ONVENTIONS
For “non-standard” matrix cards, this convention cannot be used, however. For these switch cards,
the full 2- and 4-wire names are provided following the 1-wire discussion for those cards.
RF S
WITCHING
The EX1200-6xxx cards can be used for high bandwidth applications such as switching to/from
oscilloscopes and function generators. These modules provide a maximum of 10 W of switching
power and the stub effects are terminated to ensure maximum signal fidelity.