The Packet Radio
“
2 N 1
”
Handbook
by
Buck Rogers
K4ABT
Section 1
;
Packet Radio “The Basics
”
Section 2
;
The X1J4 System Node Operator’s (SNO) Handbook
ILLUSTRATION SECTION Charts & Node Drawings
TheNET
X1J4 System Node Operators Handbook
__ Page 49
APPENDIX “C”
The MFJ-52B DEViation and ADC meter for the X-1J4 NODE
The following addendum of this handbook is excerpted from the X1J4 overview documentation by Dave Roberts
and Neville Pattinson. The purpose of this addendum is to give the X1J4 sysop a jump-start to configure the
addition of the MFJ-52A PC Board in the X1J4 node. For a much more detailed set of X1J4 documentation, print
the OVERVIEW.TXT file from the original X1J/2 disk.
♥
METER
♥
ADC (S meter)
♥
ADC1 (Temperature)
♥
ADC2 Voltage)
METER COMMAND:
This command's syntax is similar to the PARMS command, and includes the new syntax as described in
the X1J4 overview guide, section 3.32.
It allows the following parameters to be controlled. Note that the parameter list differs from TheNet X-1J,
where the first ( and only ) parameter was the deviation meter scaling factor.
1
The meter mode flags
2
The deviation meter
scaling
factor
3
The signal strength meter noise floor value
4
The S meter display format multiplier
5
The dBm meter display format multiplier
6
The dBm noise floor value
7
The voltmeter channel 1 multiplier
8
The voltmeter channel 2 multiplier
9
The voltmeter channel 1 offset value
10 The voltmeter channel 2 offset value
IMPORTANT NOTE !
If you are
NOT
using the MFJ-52B deviation, temperature, volt, and S meter add-on PC
board, then set the METER command to:
ME 0 0 0 0 0 0 0 0 0 0
THE METER MODE FLAGS
Each bit of this parameter controls a different aspect of the meters as shown below
BIT If set, then ....
0 The deviation meter is enabled
1 The signal strength meter is enabled
2 The signal strength is shown as S points rather than dBm
3 ADC channel 3 is enabled ( voltmeter channel 1 )
4 ADC channel 4 is enabled ( voltmeter channel 2 )
5 Voltmeter channel 1 divisor is 1000 rather than 100
6 Voltmeter channel 2 divisor is 1000 rather than 100
7 Voltmeter channel 1 displays fine resolution rather than integers
8 Voltmeter channel 2 displays fine resolution rather than integers
