Instruction manual

Chapter 4 Technical Information 31
GE Star® Format Types
Radio systems using GE Star® can define the T1, T2 and S1 bits to
have different values or various meanings. Industry-wide, there are
sixteen accepted variants with Format ―B‖ being the industry defacto
standard. The VMDE-200 is programmable for any of the sixteen
variants.
Format Definitions
The following table defines the sixteen GE Star® formats.
Format
Description
T1
T2
S1
Comments
A
IDs to 2047 (1st 11 bits).
X
X
X
T1, T2, and S1 ignored
B
IDs to 16383 (14 bit ID)
8192
4096
2048
Expanded-ID STAR #1.
C
IDs to 16383 (14 bit ID)
4096
8192
2048
GE-STAR #3.
D
IDs to 16383 (14 bit ID)
4096
2048
8192
Compatible with GE-STAR #4
E
IDs to 4095 (12 bit ID, T2 =
"0")
2048
M0
X
GE-STAR #1. T2 = "0" for Mobile.
F
IDs to 4095 (12 bit ID, T2 =
"1")
2048
P1
X
GE-STAR #1. T2 = "1" for Portable.
G
IDs to 8191 (13 bit ID, T2 =
"0")
4096
M0
2048
GE-STAR #2. T2 = "0" for Mobile.
H
IDs to 8191 (13 bit ID, T2 =
"1")
4096
P1
2048
GE-STAR #2. T2 = "1" for Portable.
I
IDs to 4095 (12 bit ID),
Tags="00"
0
0
2048
System "0"
J
IDs to 4095 (12 bit ID),
Tags="01"
0
1
2048
System "1".
K
IDs to 4095 (12 bit ID),
Tags="10"
1
0
2048
System "2".
L
IDs to 4095 (12 bit ID),
Tags="11"
1
1
2048
System "3".
M - P
IDs to 2047 (11 bit ID)
X
Identical to I - L with capability only to
program IDs to max of 2047.
Value Assignment
Description
8192
If bit is set, add 8192 to ID
4096
If bit is set, add 4096 to ID
2048
If bit is set, add 2048 to ID
M0
If the bit is not set, originator is a Mobile
P1
If the bit is set, originator is a Portable
X
This bit is ignored
For system types E through H, the VMDE-200 will look for the T2 bit
to designate if the received message is from a mobile or portable.
The radio display will describe the source. Typically, a radio system
that uses these descriptors will use formats E and F or G and H. If
the VMDE is programmed for format E and it receives a PTT ANI
from a mobile radio programmed for format E, the radio display will
show the unit ID and an ―M‖ because the originator was a mobile