12
Agilent 8710x Operating and Service Manual
2
Switch Configuration
Driving the Switch
Each RF path can be closed by applying ground (TTL “High” for
Option T24) to the corresponding “drive” pin. In general, all other
RF paths are simultaneously opened by internal logic. See
for drive connection diagrams.
The default operation of the switches is break- before- make.
Make- before- break switching can be accomplished by
simultaneously selecting the “drive” pins for old RF path and new
RF path. Once the new RF path is closed (15 ms), de- select the
old RF path “drive” pin while leaving the new RF path “drive” pin
selected. The switch circuitry will automatically open the old RF
path while leaving the new RF path engaged.
Figure 2
Drive Connection Diagram for Option 161 and Option 100
Drive
Sense
Common
ground
Ind. Comm.
Ind. 1
Ind. 2
Ind. 3
Ind. 4
Ind. 5
Ind. 6
+24 Vdc
*Path 1
Path 2
Path 3
*Path 4
Path 5
Path 6
10
12
14
2
4
6
8
15
1
3
5
7
9
11
13
15 16
Common Ground (Green - 15)
Indicator Path 6 (Yellow - 14)
Drive Path 5 (Brown - 11)
Indicator Path 4 (Black - 10)
Indicator Path 3 (Gray - 8)
Drive Path 2 (Green - 5)
Indicator Path 1 (Yellow - 4)
** Open all paths (Blue - 16)
Drive Path 3 (Violet - 7)
Drive Path 6 (Orange - 13)
Indicator Path 5 (Red - 12)
*Drive Path 4 (White - 9)
Indicator Path 2 (Blue - 6)
*Drive Path 1 (Orange - 3)
Indicator Common (Red - 2)
Drive Common (Brown - 1)
Drive
Sense
Ind. comm.
Open all paths
+24 Vdc
*Path 1
Path 2
Path 3
*Path 4
Path 5
Path 6
Common Ground
1
2
Ind. 1
3
4
Ind. 2
5
6
Ind. 3
7
8
Ind. 4
9
10
Ind. 5
11
12
Ind. 6
13
14
Switch connector (Option 161)
Mating cable connector
15
16
1
2
Solder terminal (Option 100)
* Path1 and path 4 are not connected for 87104A/B/0C/D
** “Open all paths pin is not available for option 100
87104-90001.book Page 12 Thursday, August 30, 2007 3:49 PM
