Entering Remote Mode; Exiting Remote Mode; Lifetime Of Changes To Spectrum Master Operating Parameters; Write Cycle Limitation Of Eeprom - Anritsu Spectrum Master MS2711D Programming Manual

Entering Remote Mode

Send the Enter Remote Mode Byte #69 (45h) to the Spectrum Master to enter remote mode at the end of a sweep
Send the Enter Remote Mode Immediately byte #70 (46h) to enter remote mode in the middle of a sweep.
The Spectrum Master's serial port buffer is one byte wide. No internal buffer exists, so waiting for the unit's
response is essential. If the Spectrum Master is not in remote, sending a second byte overwrites the original byte
commanding it to go into remote. If you send control byte #69, you must wait until the end of the sweep. If you
send control byte #70, the unit will enter remote mode as soon as it receives the byte. Note that this means that data
stored for the current sweep may be incomplete.
Once you receive the response string from Spectrum Master, you are in remote mode.

Exiting Remote Mode

Send the Exit Remote control byte #255 (FFh) to the Spectrum Master. Spectrum Master sends a response byte of
255 (FFh) then exits remote mode. Remote mode can also be exited by pressing the ESCAPE/CLEAR key.

Lifetime of Changes to Spectrum Master Operating Parameters

System parameters changed during remote mode remain changed for normal operation. They are not automatically
written to the non-volatile EEPROM. Turning off power erases the changed settings.
If you want the changes saved, you must save the change to one of the setup memories. Use either the run-time
setup (location 0, which holds the power-on defaults) or one of the nine saved setups. See control byte #18 (12h) for
details.

Write Cycle Limitation of EEPROM

The EEPROM, used to store calibrations, setups and traces has a guaranteed lifetime of at least 100,000 write cycles
and an unlimited number of read cycles. The write cycle limitation is for a specific location. For example, you can
store setup #1 100,000 times and setup #2 100,000 times, etc.
It is for this reason we do not automatically store the changed system parameters to EEPROM. Instead, we provide
a means of changing the operating parameters independent of this limitation.
Be aware of the EEPROM write cycle limitation when programming the Spectrum Master. Keep the number of
write cycles to a minimum.

Documentation Conventions

Through this manual the following conventions will be observed:

Numeric Representation:

Hexadecimal numbers are represented with the suffix h. For example, the decimal number 255 is represented in
hexadecimal as FFh.
Binary numbers are represented with the suffix b. For example, the decimal number 2 is represented in binary as
10b.
Decimal numbers are represented with the prefix # when referring to a control byte (command byte) and without a
prefix or suffix in all other cases.

Bit Positions:

When enumerating bits in a byte, bit 0 will always be the least significant bit (LSB).
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