Advertisement
Section
3
TTS
58AXPJ
Model 58BXPJ
3.8
3
.
9
a.
Set IMPULSE COUNTER TIMER
to desired time in minutes.
b
.
On the Model 58B, immediately
and momentarily depress the COUNT/
RESET key switch to
RESET position.
For the TTS 58A,
reset all
three
mechanical counters.
This resets
all
counters to 0 and
establishes
the
start
of
the test.
a.
At the end of test,
when
timer
has returned to 0, record
individual
readings
accumulated on
mechanical
counters
on
TTS 58A
.
For
example:
(See Table
3-3)
Readings indicate
that 122 phase hits due to impulse
noise
exceeded
5° phase shift but
were
less than 10°.
50 phase hits
0
0
exceeded
10
but
were
less than 16
2 phase hits
were greater
thah 16°.
TABLE
3-3
Main Sens. Control
Channel
Sens.
Controls
70
70
70
c
B
A
10
6
0
TABLE 3-4
b.
InthecaseoftheModel58B,
set
SELECTOR switch to
each channel
and record individual readings
For
example:
(See
Table
3-4).
Rea4ing
9
indicate a total
of
112 hits
due to imp}llse noise and resulted in
phase
shifts equal
to
or greater
than
0
.
.
5 ;
82 of
these
were equal
to or
0
greater
than
8
; 2J
were equal
to or
greater
than 12. 5
and
6
were equal
0
to
or greater
than
20
,
c.
To by-pass phase
measuring
set
to measure IMPULSE NOISE or
CIRCUIT
NOISE with
58B or TTS
58A,
place MEAS
NOISE/MEAS
PHASE
toggle switch in MEAS NOISE position.
This connects the
external
line
directly
to
the
IMPULSE
COUNTER
LINE input.
Cha
.
Sens.
Readings
Cor
res
.
(Phase Hits)
Phase Hits
80
dBrn
2
16°
76 dBrn
50
10°
0
70
dBrn
122
5
Min. Level
Impulse Noise
In~t
~ment
Channel
Readings
Corres.
3-4
70
70
70
70
Thresh,
12
8
4
0
Level
Sens.
D-82 dBrn
C-78
dBrn
B-74 dBrn
A.-70
dBrn
(Phase Hits)
. .
6
25
82
112
Phase Hits
0
20
0
12.
5
80
0
5
l
L
Advertisement
