Spectra Precision ProFlex 800 Reference Manual - Manual (Page 725)

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Other Procedures & Memos
Configuring Serial Port A
• Set up your equipment in such a way that it can
successfully receive and process a serial command sent
from outside the equipment. See Applying Commands
Through Bluetooth or a Serial Port on page 292 in this
manual to know how this can be done.
• Use the $PASHS,MDP serial command to configure serial
port A as an RS232 or RS422 port. Refer to MDP: Setting
Port A to RS232 or RS422 on page 399 in this manual to
learn how to use this command.
• Use the $PASHS,CTS command to enable/disable
hardware handshaking. Refer to MDP: Setting Port A to
RS232 or RS422 on page 399.
NOTE: A Bluetooth connection is also possible between a
Bluetooth-enabled computer and the receiver.
Enabling a Firmware Option
• Set up your equipment in such a way that it can
successfully receive and process a serial command sent
from outside the equipment. See Applying Commands
Through Bluetooth or a Serial Port on page 292 in this
manual to know how this can be done.
• Use the $PASHS,OPTION serial command to enable the
firmware option. Refer to OPTION: Receiver Firmware
Options on page 414 in this manual to learn how to use
this command.
Through this command, you will enter the code provided
by Spectra Precision after you purchased the option.
Entering this code into the receiver will unlock the option.
Enabling or Disabling the External Reference Clock
Using an external reference clock as a frequency pilot for the
receiver requires the purchase and installation of the External
Reference Clock Input option (P/N 802097).
Use the $PASHS,REF and $PASHQ,REF command to control
the use of this input and specify the signal frequency.
Input specifications:
• Signal amplitude: 0.5 to 3 V, peak to peak
• Input impedance: 50
Ω