Keithley S46 Instruction Manual page 17

S46/S46T/S46L Microwave Switch System Instruction Manual
Cables
Only use 50 Ω cables specified for operation at the system frequency (18 GHz, 26.5 GHz, or
40 GHz).
Relay configuration
The S46/S46T/S46L can be populated with relays as follows:
• RELAY A, B, C, and D can be populated with either 4-pole or 6-pole relays. The S46T can
also accommodate up to four transfer switches (DPDT), MSPDT, and unterminated SP4T
and SP6T relays. Make sure that you note the operational differences in these relays (see
Section
• RELAY 1 through RELAY 8 (RELAY 1 through RELAY 4 for S46L) are populated with 2-pole
RF relays.
• Any or all relay locations can be populated.
Channel assignments
Table 2-1
channels.
NOTE
Table 2-1
Relay channel assignments
Relay
RELAY A
RELAY B
RELAY C
RELAY D
RELAY 1 to 8
Input/output connections
Figure 2-4
through RELAY 8. RELAY A through RELAY B have up to six input connections and one output
connection (depending on relay pole configuration). RELAY 1 through RELAY 8 each have two
input connections and one output connection.
Document number: S46-901-01 Rev. F / March 2011
3). The S46L only supports SP6T relays.
summarizes relay channel assignments. See
Regardless of the pole configuration of RELAY A, RELAY B starts numbering at
channel 7.
Channels
1 through 6
7 through 12
13 through 18
19 through 24
25 through 32
shows input and output connections for both RELAY A through RELAY D and RELAY 1
Section 2: Connections
Section 3 for information about controlling
2-5