B&B Electronics ZP9D-115RM-LR - Manual User Manual
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Manual Documentation Number: ZP9D-115RM-LR-0812
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channels are repeatedly scanned for that number of seconds. The maximum power
level seen for each channel is reported (i.e. peak hold).
A graphical spectrum analyzer can be implemented by repeatedly sending the RM
command (with no arguments) and reading the resultant 50 power levels (this is
easiest to do when CF = 1 or 2).
Sample output [when CF = 0]: Ch 0: -100 dBm
Ch 1: -103 dBm
...
Ch 49: -99 dBm
Sample output [when CF = 1]: 64
67
...
63
Sample output [when CF = 2]: 100
-103
…
-99
RN (Delay Slots) Command
RN command is used to set/read
the time delay that the
transmitting RF module inserts
before attempting to resend a
packet. If the transmitting
module fails to receive an
acknowledgement after sending
a packet, it inserts a random
number of delay slots (ranging
from 0 to (RN minus 1)) before
attempting to resend the packet. Each delay slot is 5 msec (when BR=1) and 54 msec
(when BR=0).
If two modules attempt to transmit at the same time, the random time delay after
packet failure allows only one module to transmit the packet successfully; while the
other module waits until the channel available for RF transmission.
RN Command is only applicable if retries have been enabled [RR (Retries)
Command] or if forced delays will be inserted into a transmission [TT (Streaming
Limit) Command].
RO (Packetization Timeout)
Command
command is used to set/read the
Packetization Timeout setting.
RF transmission begins when
data is in the DI buffer and either
of the following criteria are met:
• RO character times of silence
on the UART receive lines (after
receiving at least 1 byte)
AT Command: ATRN
Binary Command: 0x19 (25 decimal)
Parameter Range: 0 - 0xFF [38 ms slots]
Default Parameter Value: 0 (no delay slots
inserted)
Number of bytes returned: 1
Related Commands: RR (Retries), TT
(Streaming Limit)
AT Command: ATRO
Binary Command: 0x21 (33 decimal)
Parameter Range: 0 - 0xFFFF [ x UART
character times ]
Default Parameter Value: 3
Number of bytes returned: 2
Related Commands: RB (Packetization
Threshold)