User's Manual
Table Of Contents
- 1. Introduction
- 2. Hardware
- 3. The A431 Radio Module
- 3.1. About the A431 Radio Module
- 3.2. Functional description
- 3.3. Manufacturing Issues
- 3.3.1. Marking and labeling issues
- 3.3.2. Alignment Range and Switching Range
- 3.3.3. Tuning Procedure
- 3.3.4. Setting Up the Default Parameters
- 3.3.5. Definitions
- 3.3.6. Test Equipment Settings
- 3.3.7. Trimming Elements
- 3.3.8. Adjusting the Receiver Front End
- 3.3.9. Adjusting the VCOs
- 3.3.10. Adjusting the Crystal Reference
- 3.3.11. Checking the Receiver Parameters
- 3.3.12. Checking the Transmitter Parameters
- 3.3.13. Data Transfer Check
- 3.6. Frequency Reference Specifications
- 3.7. A431 Module’s Photographs
- 4. Software
53
Commands
FREQ
DESCRIPTION Sets/returns the operating frequency.
PARAMETERS The operating frequency and step (Hz), or none in the GET version.
RETURNS The actual frequency and step, in Hz.
REMARKS GET/SET.
REMOTE Yes, SET only.
EXAMPLE
FREQ 433925000 25000
193 FREQ 0
#
FREQ
193 FREQ 433925000 25000 0
#
DATA
DESCRIPTION Returns data stored for a certain device.
PARAMETER The ID of the device for which the data is requested and the date/time (in the stan-
dard format) the data was stored. If missing, it refers to the data of the local device.
RETURNS A data block.
REMARKS GET only. If the date/time parameter is not included, the latest data is returned. If
the date/time parameter is included, the date and time closest to, but later than, the
given date/time is returned.
REMOTE Yes, for a GET, but only one frame at a time. The A440 implements only the remote
version.
EXAMPLE
DATA 193 12/12/1998 12:12:12
193 DATA b1 b2 b3 ... bn 0
#
The data block returned will typically contain a number of data frames (telegrams).
The structure of a block is as follows:
dd mm yyyy hh mm ss si ft d1 d2 ... dn dd mm yyyy ... dn cs
where:
• dd mm yyyy is the date
• hh mm ss is the time
• si is the size of the frame
• ft is the frame type
• d1 d2 ... dn are the data values (the frame content)