temp The temperature measured inside the power sensor enclosure. The value is in degree Celsius.
sens
The actual input amplifier sensivity. sens is either HIGH or LOW
tflt
The threshold fault state. if the power reading is below the threshold the value is FAULT,
otherwise it is OK
To set the operational parameters the power sensor, request the 'set' document with a HTTP GET
command and append the parameters which shall be set to the URL. The path which must be sent with the
GET request is
/set?fmt=txt&...
where ... stands for an arbitrary number of parameter definitions, each consisting of a key word and the
associated parameter value, separated by a '=' character. Assuming the power sensor listens to the IP
address 10.0.0.1, an example URL for this request is:
http://10.0.0.1/set?fmt=txt&smod=AUTO&offs=0
The 'fmt=txt' parameter forces the power sensor to reply a one line text document rather than the HTML
coded page which is normally displayed by the web browser. The parameter definitions 'smod=AUTO' and
'offs=0' shown in the above example make the power sensor to select it's sensivity range automatically and
to clear any user defined offset to the measurement value. For a complete list of keywords see the table
below.
The power sensor replies to every 'set' request with a complete list of parameters in one line. Like with the
'read' command, the line consists of a set of keyword - value pairs, separated by '&' characters. Within each
pair, keyword and value are separated by the '=' character.
smod=AUTO&fltr=OFF&thrh=-99.99&freq=0&fcor=0.00&offs=0.00&snr=0D8F9
The values contained in this list are the values which actually are applying, including the new values read
from the 'set' URL. The power sensor does not give a fault message if it receives an invalid parameter
definition. It limits parameter values to a valid range or selections instead. If a keyword is not known, it
ignores this parameter completely. To read the parameters actually set with changing a value, send a HTTP
GET request with 'fmt=txt' as the only parameter.
The table below describes the valid parameter settings (keywords and selection tokens are case sensitive):
smod Sets the sensivity range, the power sensor uses. AUTO makes the power sensor select the
appropriate range automatically. LOW selects the low sensivity range (for high levels), HIGH
selects the high sensivity range. It is strongly recommended to operate the power sensor with
smod=AUTO. The power sensor uses this as fall-back, if it receives an invalid 'smod' selection.
fltr
Sets the filter, the power sensor applies to the measured values. Valid choices are OFF, FAST and
SLOW. OFF is the default value the power sensor uses if it recognizes an invalid 'fltr' selection.
thrh
Defines the alarm threshold value. If the displayed power value (with any user defines offset and
frequency response calibration already applied) drops below this limit, the power sensor reports a
'low signal' alarm and opens the fault relay contact. To disable the threshold, set it to -99.99.
freq
Defines the frequency of the measured signal in MHz. If this parameter is not zero, the power
sensor looks up the frequency response calibration offset for the given frequency and adds this
offset to each measured value before it is displayed. 'freq' accepts integer numbers on the range 0
.. 19000.
fcor
The calibration offset, the power sensor actually adds to each measured value due to the
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PS-UM-2002 Page 11/16
