User Manual

AS4000 Survey Tool
605-0000-429
Issue 1.6. Date 1/9/99
DLP-003
Page 1 of 2
PROGRAMMING THE CRU
The CRU should be programmed prior to using the survey tool.
STEP PROCEDURE
7. 1. CRU Programming
1. Switch on the power at the test box.
2. Ensure Indicator A is not illuminated. If Indicator A is illuminated the Test Box is
connected to an unmodified CRU and the TX output will not be disabled when the
TX disable switch is operated.
3. Connect an MF or LD type telephone to the socket labelled Phone A.
4. Each CRU is initialised by entering a unique code. These codes are entered using
the telephone and should be allocated by the RF planning office, or a
programming code may be set up as shown in Figure 12.
Figure 12. CRU Programming Information
RF
2
digits
PN
1
digit
RW
2
digits
Identity
6
digits
Check
N
o
.
1 digit
Remote site
location
0 8 2 1 4 000000 4 CRU1
RF is the frequency (in the example above frequency = 8)
PN is the PN code (in the example above = 2 )
RW code is the user number (in the example above =14)
Identity can be set to 000000 (* may also be entered in place of the identity)
The check digit is the units column sum of all the digits minus one in this
example 8+2+1+4=15 therefore the units column contains the figure 5 subtract
1 = 4
Therefore the check digit is 4.
See appendix F for further details of RF codes and CRU programming
5. Ensure the TX switch is set to TX disabled.
6. Switching on initiates the reset sequence. The red reset LED flashes to indicate the
CRU initialising and self test sequence. Note if the red LED glows permanently
then there is no connection to the CRU, check all connections.
7. After approximately 10 sec, the CRU initialising and self test sequence will be
complete and the Reset LED will be extinguished. The Link Acquired LED will
not yet illuminate.