Keithley S46 Installation Manual page 3

Figure 2
Relay connector locations
To Power
Supply Board
18GHz, 26.5 and 40GHz Relay A-D installation
NOTE: Install 26.5 and 40GHz SP6T with port 6 at 12 o'clock position. Control wiring
changes port orientation—dimple identifies operational port 2.
1. Remove the four screws securing the cover plate over the mounting hole where the new relay is to
be installed (see
2. Connect the supplied ribbon cable to the relay (see
For 18GHz relays—Connect the supplied ribbon cable to the relay securing it with the two 4-
40X1/4PPHSEM screws.
For 26.5 and 40GHz relays—Solder the supplied ribbon cable to the relay control solder pins.
3. Insert the relay in the mounting hole, and then secure it with the four screws removed in step 1.
4. Plug the ribbon connector into the appropriate circuit board connector (see
5. Install the top cover, and then configure the system as covered in
of this guide.
System configuration
After installing the new relays, you must program the S46 for the new relay configuration with the following
command:
:ROUT:CONF:CPOL <clist>
<clist> is defined as follows:
clist = (@0 | 3-6, 0 | 3-6, 0 | 3-6, 0 | 3-6, 0 | 1, ... 0 | 1)
Relay: A B
NOTE: All switch locations must be included in the <clist> whether or not all locations
are populated. The numeric value (1 or 3-6) indicates the number of throws,
while a value of 0 indicates that a location is not populated.
For example, if RELAY A and RELAY B are SP6T, RELAY 1 and RELAY 2 are
SPDTs, and all other locations are not populated, the command syntax would
be:
:ROUT:CONF:CPOL (@6,6,0,0,1,1,0,0,0,0,0,0)
See Section 3 of the S46 Instruction Manual (document number S46-901-01) for detailed programming
information.
3
RELAY A–D
Connectors
(J5–J8)
Figure 3).
C D 1 ...
RELAY 1–8
Connectors
(J18–J25)
Figure 3):
8
Relay Connector
1 J18
2 J19
3 J20
4 J21
5 J22
6 J23
7 J24
8 J25
Relay Connector
A J5
B J6
C J7
D J8
Figure 2).
"System configuration" on page 3
PA-910 Rev. B / 12-05