Model: DDU-TM-44/46 or DDU-44/46
Doc. Ref. no. : - m06c/om/101
Issue no. 04
User’s Manual
Page 32 of 36
8.1.2 T-Format
The settings for this format are programmable. The full data message of T-format shall consist of 21
printable characters with a concluding CRLF as follows:
Table 8 T-Format
Description
Number of
Characters
Character
Position
Range of
Value/Information
Code Identification
1
1
Capital T
Divider
1
2
:
Year in Century
2
3,4
0 to 99
Divider
1
5
:
Month
2
6,7
1 to 12
Divider
1
8
:
Day of Month
2
9,10
1 to 31
Divider
1
11
:
Day of Week
1
12
1 to 7
Divider
1
13
:
Hours
2
14,15
0 to 23
Divider
1
16
:
Minutes
2
17,18
0 to 59
Divider
1
19
:
Seconds
2
20,21
0 to 59
Divider
1
22
:
GMT Marker
1
23
0 or 1
Validity Marker
1
24
0 or 1
CRLF
2
25,26
Non printing character
8.2 Wireless Time Frame Input
8.2.1 Wireless Clock Network
DDU-TM-44/46 or DDU-44/46 designed to create mesh network protocol to increase the range of
DDU-TM-44/46 or DDU-44/46 network as shown in fig 22.
As shown in fig 22, there is Wireless master connected with GPS, which transmit the GPS time
code in 866 MHz frequency. Wireless master will transmit data on 0 RF channel, so please set
RF receive channel 0 on DDU-TM-44/46 or DDU-44/46, all slave DDU-TM-44/46 or DDU-44/46
will get lock which are in range of Wireless Master. As shown in figure S1, S2 and S3 are all in
range of master so it will be directly connect with master.
Slave device S4 is out of range from Wireless master so; it will not connect with master. It will in
the range of Slave clock S1 it works as master clock. Slave device S4 is Synchronize with S1
clock.
Slave clock 7 and 8 in the range of Slave clock 5 and Salve clock 6 it works as master clock.
This two clock synchronize with respective Master clock.
In DDU-TM-44/46 or DDU-44/46 we have given option of re-transmission of Received signal on
configured channel using key configuration, please refer section 6.2 for RF
– transmit and
receive channel configuration.
So please set S1, re-transmission on channel 1, S2 on Channel 2, S3 on channel 3, so you can
connect more slave devices(Slave to Slave Delay <=1s) using this mesh protocol created by
DDU-TM-44/46 or DDU-44/46.
8.2.2 DDU-TM-44/46 or DDU-44/46 Re-Transmit Option Details
For increasing the network range and for creating the mesh network, DDU-TM-44/46 or DDU-
44/46 has option of re-transmission of received signal using key configuration.
You can configure 1-9 RF transmit channel and in case of you do not want re-transmit the signal
please select no option in key configuration.
