TB11-6625-596-12/1
c. Square the earphone unit over the test
table 4 for list of
specific jacks and/or special cables and
adaptor plate required for the particular item to be tested.
microphone screen. Hold the earphone unit in place with
Connect the special cable leads to the EARPHONES
the clamping fixture.
front panel terminals.
f. Press the LOW, CENTER, and HIGH buttons in
sequence. The meter should read within the meter
limits indicated in table 4 for each condition.
Table 4. Norms for Earphones and Headsets
RECEIVER
LEVEL controls
VALUE controls
Meter Limits
Transducer
LOAD
Notes
switch
A
B
C
D
LOW CENTER HIGH
Earphone
H-269/G
15
10
8
6
10
35-65
40-65
40-65
Use cable C.
H-16( )/U
8000
20
8
4
0
35-65
35-66
20-60
Use Cable E.
H-16A
300
20
0
7
2
20-85
20-70
20-70
Use Cable E.
H-43/U
8000
20
1
5
0
28-70
34-68
14-66
Use Cable B.
H-65/U
1000
20
7
4
1
25-68
25-75
20-86
Use Cable E.
H-113/U
300
10
6
4
4
30-80
30-85
30-80
Use Cable E.
H-140/U
1000
10
4
6
11
40-70
40-75
40-70
1A2A14J7
H-158/AIC
15
0
0
2
14
15-60
25-65
25-70
Use adaptor plate.
1A2AIW48
H-183/U
15
0
8
7
14
30-70
30-70
30-70
Use Cable H.
H-216/U
300
10
3
5
10
35-75
30-75
35-70
Ue oble E.
H-227/U
1000
10
4
6
11
40-70
40-75
40-70
IA2AI6
H-251/U
300
10
8
7
8
35-70
40-60
40-65
1A1A2A147
d. Test the dynamic microphone portion, using the
10. Headset-Microphone Combination Test. a.
NOTE
b. Test the headset portion, using the testing
procedures in paragraph 9, but refer to table 56.
The type of microphone used in specific
c. Test the carbon microphone portion, using the
equipments is identified in column 1 of
Table 5. Norms for Headset-Microphones
RECEIVER
LEVEL controls
VALUE controls
Meter Limits
Transducer
LOAD
Notes
switch
A
B
C
D
LOW CENTER HIGH
a
H-63/U
100
60
4
7
7
30-78 25-79 25-76
Use Cable A.
b
10
4
8
6
39-80 29-70 30-75
Use Cable C.
300
a
70
2
13
16
40-66 40-68 40-68
1A2A14J6
H-91( )/U
200
b
20
6
7
3
16-75 30-75 30-75
300
a
10
3
13
19
30-80 30-76 30-75
1A2A14J8
H-101A/U
4
b
0
9
6
11
40-70 40-70 34-90
15
a
70
0
6
11
40-60 40-60 38-60
1A2A14J6
H-144/W
20
b
20
5
7
2
40-70 40-70 40-70
300
a
10
4
6
17
35-80 35-75 35-70
Use adaptor plate.
H-157A/AIC
4
b
0
0
2
16
15-60 25-65 25-65
1A2A14J8
15
a
c
20
1
9
12
25-65 30-70 35-70
1A2A14J7
H-161/GR
150
b
d
300
10
1
7
12
40-70 36-75 38-70
Use Cable G
d
H182/PT
20
70
2
13
17
40-84 40-78 40-84
Use adaptor plate.
b
0
4
6
8
36-80 40-90 26-88
1A2A14J6
125
a
MICROPHONE LOAD switch position.
b
RECEIVER LOAD switch position.
c
Connect P2 (unmarked connector of H-161/GR) to cable G. Insert the red banana plug into the lower EARPHONE terminal and the
black plug into the upper EARPHONE terminal.
5