Harris PT-150C, Руководство пользователя

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About the PT-150C and PR-150C
Input Impedance
PT/PR-150C Module Installation & Operation Manual Harris Corporation
Issue 1, October 2000 Intraplex Products
1-12
1.8 Input Impedance
1.9 Configuration Settings
Table 1-7 Audio input impedance jumpers (JMP1 and JMP2) — PT-150C only
Jumper Setting Effect
JMP1 In place Sets left channel input to 600 ohms impedance
Removed Sets left input to greater than 10 kilohms impedance
JMP2 In place Sets right channel input to 600 ohms impedance
Removed Sets right input to greater than 10 kilohms
impedance
Table 1-8 Configuration setting (SW5)
Position Label Setting Description
1 M450 Up Disabled
Down A 7.5 kHz mode supporting VRM applications that
require an 8 kHz synchronization bit. See Section 7.2,
Using PT/PR-150C Modules in a Variable Rate
Multiplexer
, on page 7-2
2 EMP1/D-EMP1 Up Disabled
Down Applies J.17 emphasis on the PT-150C (or
de-emphasis on a PR-150C) to the analog audio signal
on channel 1
a
3 EMP2/D-EMP2 Up Disabled
Down Applies J.17 emphasis on the PT-150C (or
de-emphasis on a PR-150C) to the analog audio signal
on channel 2
a
4 TONE (PT-150C)
SPARE (PR-150C) Up Disabled
Down Activates a 1 kHz test tone at -12 dBFS from the
PT-150C module for testing. See Section 4.2,
Test
Procedure , on page 4-2
5 AUTO Up Disabled
Down Enables automatic synchronization mode. The
PR-150C will mute the output if sync data is not
detected. See Section 7.5,
Auto Sync Mode , on
page 7-4