NARDA PMM ER9000, User Manual

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7-26 Remote control
7.6.3 Analyzer
Reply
The PMM ER9000 replies to the command “ SAGO ” sending back an array of bytes
which contains all the information needed to draw a sweep.
Typically, the user should first send the PMM ER9000 all the setting commands to
insure the receiver is correctly set on the wanted parameters and then read the
reply.
Just as an example, the user could send the following commands:
7.6.3.1 Reply
example
#SAAT -1* Set Attenuator Automatic mode
#SAPA Off* Switch Preamplifier OFF
#SPLM a* Switch Pulse Limiter OFF
#SAFF
150e3,30e6* Sets the Start frequency to 150kHz
and Stop frequency to 30MHz
#SAHT 2* Sets the hold time to 2 ms
#SADT 2* Sets the detector to AVG
............. More Command
............. More Command
#SAGO * Start Sweep in Analyzer Mode
The PMMER9000 replies by sending a 48 bytes header followed by a variable
size array of integer (the size depends on frequency settings) as follows:
HEADER
ID Byte Value Meaning
1 A The first 8 Bytes are just a fixed header and acknowledge the command
2 G
3 O
4 =
5 O
6 K
7 0x13 (CR)
8 0x10 (LF)
9 Start
Frequency Little Endian 32 bit Float figure representing the start frequency of sweep
10
11
12
13
Stop
Frequency Little Endian 32 bit Float figure representing the Stop frequency of sweep
14
15
16
17
Step
Frequency Little Endian 32 bit Float figure representing the step frequency of sweep
18
19
20
21
…
26
Reserved
…
…
27 Attenuator Little Endian 16 bit integer representing the attenuator used
28
29
…
48
Reserved
….
…