VXI Technology, Inc.
(FRONT PANEL CONNECTOR)
100K |
|
10K | K9 |
| |
10pf |
|
+CH1
VMIP
BUS
IRQ*
100K
100K
CONTROL
- | 6K |
|
|
|
|
|
U17A |
|
|
|
|
| |
|
|
|
|
|
| |
+ |
| 2K |
|
|
|
|
|
|
|
|
|
| |
100K |
|
|
|
|
|
|
| K9 |
|
|
|
|
|
10K |
|
|
|
|
|
|
|
|
|
|
| VCC |
|
|
|
|
| BUFCH1 - | 4.7K |
|
|
|
|
| 4.7K |
| |
|
|
|
|
|
| |
DACDATA | D A C | TRIGLEV1 | 1K |
| U13A |
|
|
|
| ||||
DACLOAD# | + |
|
| |||
|
|
|
|
| ||
DACCLK |
|
|
|
| 470K |
|
|
|
|
|
|
| |
| U8 |
|
|
|
|
|
|
|
|
|
| COMPCH1 |
|
|
|
|
|
| VCC |
|
RELAYCLK |
|
|
|
| 10K |
|
RELAYDATA |
|
|
|
|
| |
|
|
|
| LATIRQOUT | TO FRONT PANEL |
U3
RELAYENA* | CONNECTOR |
| |
| 4.7K |
| Q34 |
| 1K |
DATA | DATA |
|
|
| BUFFER | DATA | |
DOE* |
|
|
|
| U4 |
|
|
ADDRESS |
|
|
|
|
|
| |
CONTROL |
|
| |
|
| ||
BUFFER |
|
| |
|
|
| |
CONTROL |
| CONTROL | |
| U1 |
|
|
|
|
|
|
RELAY DRIVER
U15
TO RELAY K9
FIGURE 3-1: SINGLE CHANNEL OPERATION
Due to the type of signal being monitored, input channel +CH1 is grounded. The command and data for the SCPI command INP:RANG is received by the control (U1) and data (U4) buffers and routed to the control FPGA (U3). The control FPGA converts the parallel data for the relay drivers into a serial data stream. This data (RELAYDATA) is synched to the 10 MHz (RELAYCLK) and written into the relay drivers when (RELAYENA*) goes low. The relay drivers will energize relay K9 selecting a gain of 0.1 for the differential amplifier U17A.
36 | VM4016 Programming |