Cale - Control Byte #101 (65 H ); Arker - Control Byte #102 (66 H ) - Anritsu Spectrum Master MS2711D Programming Manual

Set Spectrum Analyzer Scale – Control Byte #101 (65h)
Description: Sets the reference level and the number of dB represented by each graph division.
Ref Level will be the "top" scale of the graph, and there are total of 10 division, so bottom scale can be determined
by : Ref level + 10 x dB/div.
Bytes to Follow: 8 bytes
1) Ref Level (Highest byte)
2) Ref Level
3) Ref Level
4) Ref Level (lowebyte)
5) dB/div (Highest byte)
6) dB/div
7) dB/div
8) dB/div (Lowest byte)
Spectrum Master Returns: 1 byte
1) 255 (FFh) Operation Complete Byte
224 (E0h) Parameter Error: Invalid scale
238 (EEh) Time Out Error
Notes:
Ref Level is sent as the (Ref Level * 1000) + 270,000 (0 dBm = 270,000, 20 dBm = 290000, -120 dBm = 150,000)
Scale should be sent as (dBm * 1000) (e.g. -12.34 dBm = -12340)
Set Spectrum Analyzer Marker – Control Byte #102 (66h)
Description: Sets an individual Spectrum Analyzer marker.
Bytes to Follow: 5 bytes
1) Marker Number (01h = marker 1, 02h = marker 2, 03h = marker 3, 04h = marker 4,05h = marker 5,
06h = marker 6)
2) Marker Line On/Off (01h = On, 00h = Off)
3) Marker Delta Status On/Off (01h = On, 00h = Off)
4) Marker Value (Higher byte)
5) Marker Value (Lower byte)
Spectrum Master Returns: 1 byte
1) 255 (FFh) Operation Complete Byte
224 (E0h) Parameter Error: Invalid marker number, status or position
238 (EEh) Time Out Error
Note:
Marker Value is between 0 and 400, inclusive: Point = (400 * (marker freq - start freq)) / span
100