B&B Electronics ZP9D-115RM-LR Especificaciones descargar pdf (Pagina 44)

44 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

...

Sample output [when CF = 2]: 100

-103

…

-99

RN (Delay Slots) Command

<Networking & Security> The

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

<Serial Interfacing> The RO

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)

1 2 ... 39 40 41 42 43 44 45 46 47 48 49 ... 53 54

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B&B Electronics ZP9D-115RM-LR Especificaciones Pagina 44

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