User`s manual

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Tektronix to VXI Technology Cross-Ref. Guide 83
SECTION 11
VX4330 TO SM4330: 120 CHANNEL, 2 A
SPECIFICATION COMPARISONS
Note The information provided in this section is specific to the SM4330. The SM4330A provides a pin-
to-pin replica of the Tektronix VM4350 and is presented in Section 2.
GENERAL SPECIFICATIONS Tektronix VX4330 VXI Technology SM4330
MODEL TYPE
120 Channel Scanner/Mux Module 120 Channel Scanner/Mux Module
CONFIGURATION**
240 channel 1-wire
120 channel 2-wire
60 channel 4-wire
256 channel 1-wire
128 channel 2-wire
64 channel 4-wire
INTERFACE TYPE
Message Based, SCPI, IEEE 488.2 Register Based
VXI REVISION LEVEL
1.4 1.4
INSTRUMENT DRIVERS
WIN framework (Rev. 4.0)
WIN95 framework (Rev. 4.0)
WINNT framework (Rev. 4.0)
WIN95 framework (Rev. 4.0)
WINNT framework (Rev. 4.0)
RATED SWITCH OPERATIONS
Mechanical
Electrical
1 x 10
8
1 x 10
5
(Full Load)
5 x 10
7
5 x 10
5
(Full Load)
SCANNING RATE
125 cycles/s > 300 cycles/s
MODULE SIZE
Single-wide, C-size Single-wide, C-size
POWER SPECIFICATIONS
MAXIMUM SWITCHING VOLTAGE
250 V dc or 250 V ac rms 300 V dc, 300 V ac
MAXIMUM SWITCHING CURRENT
< 30 V, 2 A / channel < 30 V, 2 A / channel
MAXIMUM SWITCHING POWER
DC
AC
60 W / channel
125 VA / channel
60 W / channel
125 VA / channel
DC PERFORMANCE
PATH RESISTANCE
< 1.5 Ω < 0.5 Ω
INSULATION RESISTANCE
> 1 x 10
7
Ω > 1 x 10
9
Ω
AC PERFORMANCE
BANDWIDTH (-3 dB)
> 10 MHz > 40 MHz
CROSSTALK
100 kHz
1 MHz
10 MHz
< -80 dB
< -50 dB
Not Available
< -90 dB
< -70 dB
< -50 dB
NOTE** The VX4330 and SM4330 are configured using different 'building blocks'. For example, in
2-wire mode, the VX4330 is sectioned off in six groups of 1 x 20, and these sections (or groups)
can be joined to form larger scanners, up to 120 channels. In 2-wire mode, the SM4330 is
sectioned off in four groups of 1 x 20 and two groups of 1 x 16. Groups 1, 2, 4 and 5 are the
1 x 20 groups. Sections 3 and 6 are the 1x16 groups. These sections can be joined under program
control to form larger scanners, up to 120 channels. Because the VX4330 groups are 1 x 20 and
the SM4330 groups are really 1 x 8, the SM4330 channel configurations vary, depending on the
number of groups joined. The standard configurations are: ‘no groups joined’, ‘groups 1 & 2
(and/or 4 & 5) joined’ and ‘groups 1, 2 & 3 (and/or 4, 5 & 6) joined’. Channel pin assignments
for the various configurations are detailed on the following pages.