R&S M3SR Series 4100 HF Transceivers Test of Specification
6124.9007.82.01 3.8
4 Receive State A3E - Display, Buttons,
Switches and Controls Check
4.1 Set transceiver to A3E RX mode 15.100 MHz
(Audio Line1 USB is used).
Apply a HF signal to X30 with the following
parameters:
Frequency: 15.100 MHz
HF level: -60 dBm
Modulation: AM
AF: 1 kHz
Modulation depth: 60%
Verify receive level on display.
≥
10 dBIV
4.2 Check the volumes of the front panel and
external loudspeaker (X26.32/.36) by
switching INT/EXT button and turning
headphone/speaker knob. To hear front
panel loudspeaker, headphones must not be
plugged in.
Tone audible
4.3 Turn speaker knob to maximal volume. By
means of INT/EXT button switch manually
from internal to external loudspeaker.
By using the audio analyzer and a 4
Ω
resistor, verify output power between X26.32/
.36.
Switch back to internal loudspeaker.
3 W into 4
Ω
(AF level about 3.5 V
RMS
)
4.4 Plug in headphones. Check volume variation
of headphones by turning headphone/
speaker knob. Check that internal
loudspeaker is switched off, when
headphones are plugged in.
Plug in headset. Check volume variation of
headset by turning headset knob.
Volume changes in audible range
No. Activity Nominal Value
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