SIGNALCORE SC5507A, Руководство по оборудованию

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Rev 1.0 | SC5507A & SC5508A Hardware Manual SignalCore, Inc.
14 SC5507A & SC5508A Hardware Manual
data to the appropriate components. This trigger pulse can be sent on the completion of every step
frequency or on the last frequency of a sweep cycle. This trigger signal is present on pin 20 (TRIGOUT).
Default Startup Mode
The factory power-up state for the device is detailed in the following table. The default state can be
changed to the current state of either channel programmatically, allowing the user to power up the
device in the last saved state without having to reprogram.
Table 5. Factory Default Power-Up State.
RF Out
Frequency 3 GHz
Power 0.00 dBm
RF Output Enabled
ALC Mode Closed Loop
Standby Disabled
Auto Level Enabled
Ref Out Select 10 MHz
Ext Ref Lock Disabled
4 Hardware Registers
Configuration Registers
These are write-only registers to configure the device. The registers vary in length to reduce redundant
data and improve the communication speed, especially for SPI and RS232 interfaces. Furthermore, it is
vitally important that the length of data written to a register is exact because failure to do so will cause
the interfaces to misinterpret the incoming data, leaving the device in a stalled state. The total number of
bytes is the sum of the register address (1 Byte) and its corresponding data bytes. For example, to set the
RF frequency value, eight bytes must be written; the sum of the 1 register byte and 7 data bytes. See the
RF_FREQUENCY register of
Table 6 . The table provides a summary of the configuration registers, and each
register is explained in detail in the sections following.
Table 6. Configuration Registers
Register Name
Register
Address Serial
Range
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
INITIALIZE 0x01 [7:0] Open Open Open Open Open Open Open Mode
SYSTEM_ACTIVE 0x02 [7:0] Open Open Open Open Open Open Open
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