GAI-Tronics ITA2000A ITA2000A Series Tone Remote Adapter with Scanning User and Installation Manual - Manual (Page 35)

ITA2000A Series Tone Remote Adapter Installation
31 03/13
Switch Settings for SW2 (Scan)
Switch Determines: Up/Down Settings
SW2-1
to
SW2-4 Scan Limit: Maximum number of channels
to be scanned.
Sequence of scanning starts at channel 1
and counts upward to the maximum
number of channels to be scanned. Once
the maximum channel has been reached
the scanning sequence repeats beginning
with channel 1.
N
OTE : The wrap-around time for
scanning the same channel is a function of
the scan limit and the scan rate. For
example, if the scan limit is 10 and the
scan rate is 100 ms, the minimum wrap-
around time for any one channel is 10

100 ms, or 1 second.
SW2 SW2
Scan 1 2 3 4 Scan 1 2 3 4
Home     8    
1     9    
2     10    
3     11    
4     12    
5     13    
6     14    
7     15    
SW2-5
to
SW2-7 Scan Rate (ms): Time allotted for carrier
detect per channel frequency.
Depending upon the radio and the
programming of the radio used, the time
required for detection of valid carrier can
vary. Factors such as the design of the
radio, use of PL/DPL and quieting can
affect carrier detection time. Consult your
radio manual and manufacturer for specific
carrier-detect times.
N
OTE : The scan rate should be set for the
maximum time any one channel requires
for reliable carrier detection.
SW2 SW2
Rate
(ms)
5 6 7
Rate
(ms)
5 6 7
100    400   
120    420   
160    460   
200    500   
SW2-8 Scan Stop Time: Time scan halts after a
desk set PTT (SW1-5) or carrier is no
longer detected (SW1-8).
UP = 4 seconds
DN = 2 seconds
N OTE : Scan Rate Setting - Due to the differences in radios, the scan rate should be selected from the
slowest level (500 ms) first. The scan rate can be affected by the PL/DPL decode time within certain
radio transceivers.