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Site Master Returns: 1 byte
1) 255 (FFh) Operation Complete Byte
224 (E0h) Parameter Error: Invalid limit segment, status or value
238 (EEh) Time Out Error
Notes: Limit Value depends on the current display mode selected.
Return Loss &: Limit should be sent as ( dB * 1000 )
Cable Loss Maximum value sent is 60000 which represents 60.00 dB
Minimum value sent is 0 which represents 0.0 dB
SWR: Limit is in thousandths (of ratio), so it should be sent as ( ratio * 1000 )
Maximum value sent is 65530 which represents 65.53
Minimum value sent is 1000 which represents 1.00
Set Spectrum Analyzer Multiple Limit – Control Byte #113 (71h)
Description: Sets the position and ON/OFF Status of a limit segment.
Multiple limits are defined by multiple limit segments, each with a different finite slope. The single limit is a single,
horizontal line that can be defined to act as an upper limit or as a lower limit. See control byte #103 for information about the
single limit.
The limit types are mutually exclusive. That is, you cannot have both single and multiple limits at the same time. Note that
setting a limit segment ON automatically makes the limit type “MULTIPLE”.
One segment is defined each time this command is sent to the Site Master. The first two bytes of the command specify which
segment is being defined. There are 5 upper limits and 5 lower limits available in Spectrum Analyzer mode. Byte 1 selects
the segment number. Byte 2 specifies whether it is an upper limit or a lower limit. Byte 3 turns the segment ON or OFF. Byte
4 specifies whether the error beep sounds when the bound set by the segment is exceeded by the measured data.
The segment location is defined by its endpoints. The “Start” endpoint must appear to the left of the “End” endpoint on the
graph. That is, Start X < End X. If Start X = End X then Start Y must equal End Y. Vertical segments are not allowed.
Bytes to Follow: 20 bytes
1) Segment number (1-5)
2) Segment type (00h = LOWER limit, 01h = UPPER limit)
3) Limit Line ON/OFF (01h = On, 00h = Off)
4) Limit Beep ON/OFF (01h = On, 00h = Off)
5) Limit Value Start X
270
(highest byte)
6) Limit Value Start X
7) Limit Value Start X
8) Limit Value Start X (lowest byte)
9) Limit Value Start Y
271
(highest byte)
10) Limit Value Start Y
11) Limit Value Start Y
12) Limit Value Start Y (lowest byte)
13) Limit Value End X
272
(highest byte)
14) Limit Value End X
15) Limit Value End X
88 Site Master PM
270 If Option 6 is installed and the frequency converter module is attached, the frequencies should be scaled by the scale
factor of the module. If the module is not attached, the frequencies are sent in Hz. Use Control Word A203 to
determine whether a module is attached and the appropriate scale factor.
271 ( Value in dBm * 1000 ) + 270,000
272 If Option 6 is installed and the frequency converter module is attached, the frequencies should be scaled by the scale
factor of the module. If the module is not attached, the frequencies are sent in Hz. Use Control Word A203 to
determine whether a module is attached and the appropriate scale factor.