Set Spectrum Analyzer Impedance - Control Byte #116 (74H); Read Marker Value - Control Byte #117 (75H) - Anritsu Spectrum Master MS2711D Programming Manual

1) 255 (FFh) Operation Complete Byte
224 (E0h) Parameter Error
238 (EEh) Time Out Error

Set Spectrum Analyzer Impedance - Control Byte #116 (74h)

Description: Set the impedance and the loss value due to an adapter.
The MS2711D can automatically compensate for the effects of impedance adapters. The impedance of the MS2711D is 50W,
so there is no need for an adapter in this case. The loss for the Anritsu 75W adapter 12N50-75B is known by the MS2711D.
This control byte also allows for the specification of the impedance and the loss due to an adapter the system does not know.
In either case, 5 bytes must be sent to the unit. If the impedance is 50W or one of the known adapters is specified, bytes 2-5
are ignored. If an unknown adapter is specified, the unit uses bytes 2-5 to correct for the adapter.
Bytes to Follow: 5 bytes
1) Impedance Adapter
343
2) Impedance Loss
3) Impedance Loss
4) Impedance Loss
5) Impedance Loss (lowest byte)
Spectrum Master Returns: 1 byte
1) 255 (FFh) Operation Complete Byte
224 (E0h) Parameter Error
238 (EEh) Time Out Error
Read Marker Value – Control Byte #117 (75h)
Description: Returns the frequency location of the specified marker, and the value at that location.
If Option 6 is installed and the frequency converter module is attached, the frequency will be scaled by the scale factor of the
module. If the module is not attached, the frequency is sent in Hz. Use Control Word A203 to determine whether a module is
attached and the appropriate scale factor.
Bytes to Follow: 1 byte
1) Marker number (1-6)
Spectrum Master Returns: 8 bytes (1 byte if an error occurs)
1) Frequency (highest byte)
2) Frequency
3) Frequency
4) Frequency (lowest byte)
5) Value at Marker (highest byte)
6) Value at Marker
7) Value at Marker
8) Value at Marker (lowest byte)
or
1) 224 (E0h) Parameter Error: Invalid marker number
238 (EEh) Time-out Error
Notes:
Marker value sent as (value in dBm * 1,000) +270,000.
342 Impedance Adapter: 00h = 50W, 0Ah = 75W, adapter 12N50-75B, 0Ch = 75W, other adapter offset
343 Send the loss value as: (value in dB * 1000)
84
342
(highest byte)
Spectrum Master PM