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Read Channel Power – Control Byte #86 (56h)
Description: Read the current channel power or the channel power of a stored trace.
Send a 0 (zero) following the command to read the current channel power measurement (i.e. the one that is updated as the
unit is sweeping).
Send 1-200 to read the channel power associated with a stored trace (use Query Trace Names, #24, to obtain trace numbers).
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, frequencies are 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) Channel Power Location (0 = current measured value, 1-200 = value in stored trace)
Site Master Returns: 21 bytes
1) Channel Power On/Off
2-5) Channel Center Frequency
6-9) Integration Bandwidth
10-13) Channel Span Frequency
14-17) Channel Power (= (power in dBm * 1000) + 270000)
18-21) Channel Power Density (= (density in dBm/Hz * 1000) + 270000)
Set Adjacent Channel Power Ratio (ACPR) – Control Byte #87 (57h)
Description: Sets the state of the measurement (ON or OFF), the center frequency, the main channel bandwidth, the adjacent
channel bandwidth and the channel spacing.
Send a 0 (zero) following the command to set the channel power measurement in the current setup.
Send a 1 (one) to set the adjacent channel power associated with the trace that was most recently uploaded by command #36,
Upload Sweep Trace.
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, frequencies are sent in Hz. Use Control Word A203 to determine whether a module
is attached and the appropriate scale factor.
Note that if the ACPR measurement is turned ON, all other measurements (field strength, channel power) are turned OFF.
Bytes to Follow: 18 bytes
1) Adjacent Channel Power Location (0 = current setup, 1 = last uploaded trace)
2) Adjacent Channel Power Measurement State (On/Off)
3-6) Center Frequency
7-10) Main Channel Bandwidth
11-14) Adjacent Channel Bandwidth
15-18) Channel Spacing
Site Master Returns: 1 byte
1) 255 (FFh) Operation Complete Byte
224 (E0h) Parameter Error
238 (EEh) Time Out Error
Read Adjacent Channel Power Ratio (ACPR) – Control Byte #88 (58h)
Description: Read the current adjacent channel power or the adjacent channel power of a stored trace.
80 Site Master PM