Watch-Dog Timer On/Off - Control Byte #12 (0Ch); Store Sweep Trace - Control Byte #16 (10H); Obsolete: Recall Sweep Trace - Control Byte #17 (11H) - Anritsu Spectrum Master MS2711D Programming Manual

Watch-Dog Timer On/Off – Control Byte #12 (0Ch)
Description: Enables or disables the Watch-dog timer. Default is Disabled.
The Spectrum Master incorporates a watch-dog timer for higher reliability in serial communication. In selected
control bytes (see control byte summary), the Spectrum Master checks for the time interval between each byte
received from the computer. If the time interval exceeds the set time limit (0.5 sec), the Spectrum Master notifies
the computer by sending Time-out Byte #238 (EEh). The Spectrum Master discards the data it just received and
then waits for the next control byte sequence.
Bytes to Follow: 1 byte
1) Watch-dog timer On/Off
00h = Off
01h = On
Spectrum Master Returns: 1 byte
1) 255 (FFh) Operation Complete Byte
224 (E0h) Parameter Error : Invalid watch-dog timer status
Store Sweep Trace – Control Byte #16 (10h)
Description: Saves current trace to the next available memory location. Trace name can be set using control byte
#9, "Set Trace Name (Reference Number)" before executing this command.
Bytes to Follow: 0 bytes
Spectrum Master Returns: 5 bytes
1-4) Time/Date Stamp (In long integer format)
5) Operation result:
OBSOLETE: Recall Sweep Trace – Control Byte #17 (11h)
This command exists for backward compatibility with MS2711B models. To access the new features use
Control Byte #33 (21h). This command cannot be used with a frequency extension module (option 6
required) attached.
Description: Queries the Spectrum Master for sweep trace data.
NOTE: Before you can recall a sweep stored in non-volatile memory (trace numbers 1-200) you must build a trace
table in the Spectrum Master's RAM. Use Control Byte #24 to build the trace table. Since the trace table exists in
RAM, Control Byte #24 must be executed every time the Spectrum Master's power is cycled.
Bytes to Follow: 1 byte
0 = Last sweep trace before entering remote mode (sweep trace in RAM)
1- 200 = Specific saved sweep number (stored sweeps in Flash memory)
Spectrum Master Returns: 1950 bytes
1-2) # of following bytes (1948 for a valid sweep)
3-4) Model ID (16h for the MS2711D)
5-11) Model Number (7 bytes in ASCII)
12-15) Software Version (4 bytes in ASCII)
16) Measurement Mode
1
See Control Byte #3 for available measurement modes.
11
255 (FFh) Operation Complete Byte
224 (E0h) Out of memory (Memory full)
238 (Eeh) Time-out Error
1