Orban OPTIMOD 5750 User Manual

Orban 5750 Technical Manual Operation 3-37
PTY
Program Type – US
Program Type – EU
16
Rhythm and Blues Music
Weather
17
Soft R and B Music
Finance
18
Foreign Language
Children’s Programs
19
Religious Music
Social Affairs
20
Religious Talk
Religion
21
Personality
Phone-In
22
Public Non-Commercial
Travel
23
College
Leisure
24
Spanish Talk
Jazz Music
25
Spanish Music
Country Music
26
Hip-Hop
National Music
27
(unassigned)
Oldies Music
28
(unassigned)
Folk Music
29
Weather
Documentary
30
Emergency Test
Alarm Test
31
Emergency!
Alarm!
Table 3-5: Program Type (PTY)
SCA/Subcarrier Phase Relationship
During stereo broadcast, the SCA subcarrier must
be locked either in-phase or in quadrature to the
third harmonic of the 19 kHz pilot tone. The
tolerance of the phase angle is ±10° measured at
the modulation input to the FM transmitter.
With no modulation other than the pilot tone, an
oscilloscope trigged from the 19kHz pilot tone
should display the waveform as seen to the right.
To minimize the amount of peak level that the RDS
subcarrier adds to the composite baseband, your
OPTIMOD’s RDS generator is locked in quadrature
with respect to the pilot tone, so the example
shown here is for reference only.
If your transmission system is broadcasting stereo
correctly, it will also correctly pass the phasing built
into your OPTIMOD’s SCA generator.
Table 3-6: Pilot/SCA Phasing Scope Trace
µMPX
µMPX in its simplest form is AES-EBU digital audio sampled at 192 kHz. AES sampling is done at 44.1 or 48 kHz in
most all broadcast plants. µMPX allows the FM multiplex signal including baseband audio, pilot, stereo sub, RDS and

Orban OPTIMOD 5750 Specifications

General

Brand	Orban
Model	OPTIMOD 5750
Category	Computer Hardware
Language	English