Rohde & Schwarz M3SR Series 4100, Service Manual, Page: 83 / 138

Test of Specification R&S M3SR Series 4100 HF Transceivers
3.7 6124.9007.82.01
3.4 Set Digital Selector (if installed) to BYPASS,
Preamp on.
Apply HF level of -120 dBm to X30 with
following frequencies:
1.5 MHz
10.107 MHz
20.107 MHz
27.501 MHz
29.999 MHz
Measure SINAD (averaging over 10 values)
of audio signal at X26.11/.41 into 600
Ω .
> 10 dB SINAD
3.5 Only if Digital Selector is installed:
Set Digital Selection to SELECTIVE, Preamp
on.
Apply following HF level to X30 with the fol-
lowing frequencies:
with R&S FK 4120: -108.4 dBm
with R&S FK 4140: -110.9 dBm
Frequencies:
1.5 MHz
10.107 MHz
20.107 MHz
27.501 MHz
29.999 MHz
Measure SINAD (averaging over 10 values)
of audio signal at X26.11/.41 at 600
Ω .
> 10 dB SINAD
No. Activity Nominal Value