Rohde & Schwarz SMB100A - Stereo;RDS Coder (Option R&S SMB-B5)

Test Procedures R&S SMB
1407.0806.82 1.48 E-5
Stereo/RDS Coder (Option R&S SMB-B5)
Frequency Response
Test setup DUT RF output connected to Modulation Analyzer RF input, Audio
analyzer LF output connected to DUT Stereo L, R input.
Test method
Measurement of demodulated AF signal by Modulation Analyzer
Measurement
Setting on DUT:
RF On
Frequency 100 MHz
Level 0 dBm
Stereo Modulation menu:
State On
FM Deviation 40 kHz
Audio Source LF Gen (EXT L, R)
Mode Mono L (Mono R)
LF Gen Frequency 20 Hz
LF Gen Shape Sine
Stereo Pilot tone settings:
Pilot State On
Pilot Deviation 6.75 kHz
ARI settings:
State Off
RDS settings:
State Off
 Setting on Audio Analyzer UPL:
GEN:
INSTRUMENT ANALOG: Channel(s) 1 (2)
FUNCTION Sine
FUNCTION Frequency = 20 Hz
FUNCTION Voltage = 0.707 V
 Setting on Modulation Analyzer FMB:
DEMODULATION FM-STEREO
CHANNEL L (R)
RELATIVE
 Vary the LF Generator frequency and measure the reference level
(MEAS-REF).
Recommended settings
 LF in logarithmic steps, 7 steps per decade (1, 1.5, 2, 3, 4, 6, 8)
from 20 Hz to 15 kHz.
 Repeat the measurement for all four combinations (internal L,
internal R, external L, external R).