Control Byte Descriptions; Setup System - Control Byte #1 (01H); Select Measurement Mode - Control Byte #3 (03H); Read Time/Date - Control Byte #7 (07H) - Anritsu Spectrum Master MS2711D Programming Manual

Control Byte Descriptions

Setup System – Control Byte #1 (01h)
Description: Sets system status flags and switches. The current value of the flags can be obtained by executing command
#29, Query System Setup, and parsing the values from the appropriate bytes. The Spectrum Master acts on the entire byte, so
the state of each of the bits must be defined every time the command is issued. See control byte #29 (1Dh) response bytes
275 and 276 for the current Spectrum Master configuration.
Bytes to Follow: 1 byte
1) Status Byte 1
bit 0: RBW Coupling (to span) (1b = auto 0b = manual)
bit 1: VBW Coupling (to RBW) (1b = auto 0b = manual)
bit 2: LCD Back Light On/Off (1b = On, 0b = Off)
bit 3-4 = Logarithmic Amplitude units (00b = dBm 01b = dBV 10b = dBmV 11b = dBuV)
bits 5-6 = Detection algorithm (00b = positive peak 01b = RMS averaging 10b = negative peak
11b = sample detection)
bit 7 = Attenuation Coupling (to ref level) (1b = auto 0b = manual)
Spectrum Master Returns:1 byte
1) 255 (FFh) Operation Complete Byte
238 (EEh) Time-out Error
Select Measurement Mode – Control Byte #3 (03h)
Description: Sets the measurement mode of the Spectrum Master. The response byte will not be sent until the mode change is
complete.
See control byte #29 (1Dh) response byte 3 for the current Spectrum Master measurement mode.
Bytes to Follow: 1 byte
1) Measurement Mode
30h: Spectrum Analyzer Mode
21h: Transmission Mode (Option 21 only)
40h: Power Meter Mode (Option 29 only)
Spectrum Master Returns: 1 byte
1) 255 (FFh) Operation Complete Byte
224 (E0h) Parameter Error : Invalid measurement mode
238 (EEh) Time-out Error
Read Time/Date – Control Byte #7 (07h)
Description: Reads the current time and date from the real time clock.
This Time/Date is stamped into all stored sweeps (for users' reference). The real time clock time and date can be set using
control byte #8.
Bytes to Follow: 0 bytes
Spectrum Master Returns: 7 bytes
1) Hour
2) Minute
3) Month
4) Day
Spectrum Master PM 7