Marconi Instruments 2955 - Page 56

OPERATION
Table
3-1
TONE
STANDARDS
USED IN
THE
2955
Tone
number
CCIR
2VEI
DZVE!
EIA*
EEA’
0
.
1981
2400
2200
600
1981
1
1124.6
1060.6
970 741
1124
2
1197
1160
1060.6
882.5
1197
3
1275
1270
1160
1023
1275
4
1358
1400
1270
1164
1358
5
1446
2530
1400
1305
1446
6
1540
1670
1530
1446
1540
1
1640
2830
1670 1587
1640
8
1747
2000
1830
1728
T747
9
1860
2200
2000 1869
1860
10
2400
2800
2400 459
1055
11
930
810
2600
1000
930
12
2247
970
885
1000
2247
13
991
885 825 1000 991
14
2110
2600
810 1000
2110
Duration
100
ms
70
ms
70
ms
33
ms
40
ms
Extended
700
ms
700
ms 700
ms 330 ms
400
ms
All
frequencies
are
show'n in
fiz.
*As
supplied,
each
2955
is
programmed
either
for EEA
(European) or
for
EIA
(North
American).
EEA
or
EIA
is shown
on the
display.
(18)
Press
the
kev
which
is arrowed bv
CObTflNUE to
return to TX SEQUENTIAL
TONE.
'
.
(19)
Press
the
kev
which is arrowed
bv
RETLIRN
to return to
TRANSMITTER
TEST.
Two
tone
generation
(20)
Select
two
tone
operation
by
pressing
the
MODE
key
(T) which
is
arrowed
by
TWO
TONES.
Tne TWO
TONE
menu
is
displayed.
46881-622N
Apr.
88
3-32